Explore Illinois nuclear-energy policy, including the state’s existing reactor fleet, clean-energy support mechanisms, proposals for new nuclear development, federal licensing and safety oversight, spent-fuel management, and the effects of nuclear facilities on workers, customers, host communities, and the electric grid. Select a section below for additional analysis and official resources.
Illinois nuclear policy has shifted from preserving existing plants toward evaluating whether new nuclear generation should become part of the state’s response to rising electricity demand, reliability concerns, and clean-energy requirements.
Existing Illinois Nuclear Fleet
Illinois has eleven operating commercial reactors at six nuclear stations: Braidwood, Byron, Clinton, Dresden, LaSalle, and Quad Cities. These plants supply substantial around-the-clock electricity, participate in the MISO or PJM regional markets, and provide employment and property-tax revenue in their host communities.
The continued operation of an existing reactor is different from construction of a new facility. Existing plants may pursue federal license renewals, equipment upgrades, or increases in authorized output without creating an entirely new generating station.
Illinois’ Nuclear-Construction Policy Has Changed
Illinois maintained restrictions on new nuclear-power-plant construction for decades. Public Act 103-0569, enacted in 2023, created an exception allowing consideration of small modular reactors with a maximum nameplate capacity of 300 megawatts beginning January 1, 2026.
The Clean and Reliable Grid Affordability Act, enacted as Public Act 104-0458 and effective June 1, 2026, subsequently lifted the remaining state restriction on new, larger nuclear reactors.
Removing the state restriction does not approve a particular project, guarantee financing, or replace federal licensing. Proposed reactors must still satisfy the applicable Nuclear Regulatory Commission review and other federal, state, regional-grid, and local requirements.
New Nuclear Development Is Under Evaluation
Illinois has begun examining how at least two gigawatts of additional nuclear capacity could be developed, with potential locations including existing nuclear sites, retired fossil-generation sites, research institutions, and locations associated with major industrial or technology demand.
In 2026, nine Illinois communities or institutions expressed preliminary interest in hosting nuclear development. The responses demonstrate local interest and help identify possible locations, but they are not siting approvals, construction commitments, or findings that a particular reactor design is technically or financially viable.
Conventional Reactors, SMRs & Microreactors Are Different
A conventional commercial reactor generally produces substantially more electricity than an individual small modular reactor. An SMR is designed for a smaller output and may use modular manufacturing or construction methods. A microreactor is an even smaller advanced-reactor concept generally intended for specialized, remote, institutional, military, or industrial applications.
These technologies may differ in design, fuel, cooling, safety features, deployment model, output, and licensing pathway. Claims about lower costs or faster construction remain project- and technology-specific, particularly because commercial deployment of many advanced designs is still limited.
Federal and State Responsibilities Remain Distinct
The Nuclear Regulatory Commission licenses commercial reactors and oversees reactor safety, security, inspections, operator requirements, spent-fuel storage, and decommissioning.
Illinois agencies have responsibilities involving radiation protection, emergency preparedness, environmental regulation, utility policy, economic development, and energy planning. Local governments and host communities may also address land use, emergency services, infrastructure, taxation, and community impacts within their legal authority.
State support for nuclear energy does not reduce the NRC’s licensing and safety responsibilities.
Existing-Plant Support Is Evolving
Illinois previously used zero-emission credits and later carbon-mitigation credits to support designated existing nuclear plants and preserve their carbon-free generation, employment, and reliability contributions. Depending on market conditions and the governing contracts, these mechanisms can produce either customer charges or credits.
Private commercial agreements are also becoming more important. Long-term electricity arrangements involving technology companies or other large customers may support continued plant operation or additional output. Such agreements should be distinguished from state-mandated customer support, although their effects on regional supply, transmission, capacity markets, and remaining customers may still require review.
Spent Fuel Remains a Long-Term Federal Policy Issue
Commercial spent nuclear fuel is stored at operating and decommissioned nuclear sites because the United States does not have an operating permanent repository for commercial spent fuel. Storage commonly begins in spent-fuel pools and may later move to dry-cask systems.
Although the federal government is responsible for developing a permanent disposal solution, Illinois communities continue to host spent fuel and therefore retain an interest in storage safety, security, transportation, decommissioning, and long-term site stewardship.
Principal Issues to Monitor
Current Illinois nuclear-policy questions include:
Whether proposed conventional, small modular, or microreactor projects can obtain financing and federal licenses;
The state’s implementation of its new nuclear-development policy;
Potential projects at existing nuclear, retired fossil-generation, university, industrial, or data-center sites;
License renewals, uprates, and continued operation of existing reactors;
Allocation of construction, transmission, decommissioning, and stranded-project risks;
The relationship among state support, wholesale-market revenues, and private power contracts;
Reactor and fuel-supply-chain readiness;
Workforce availability and labor standards;
Emergency planning, water use, and environmental review;
Spent-fuel storage and permanent disposal;
Property-tax and economic effects on host communities; and
Nuclear generation’s role alongside renewable energy, storage, demand flexibility, and transmission expansion.
Sources & Further Reading:
U.S. Nuclear Regulatory Commission — Operating Nuclear Power Reactors
U.S. Nuclear Regulatory Commission — Locations of Operating Nuclear Power Reactors
Governor’s Office — Clean and Reliable Grid Affordability Act Signing
Capitol News Illinois — Nine Illinois Communities Express Interest in Nuclear Facilities
Illinois Emergency Management Agency and Office of Homeland Security — Nuclear Safety
Use these current government and regulatory resources to review Illinois nuclear facilities, state law, federal licensing, reactor oversight, energy-market information, emergency preparedness, spent-fuel management, and decommissioning.
Illinois Law & State Energy Policy
Public Act 103-0569 — Small Modular Reactor Legislation — The 2023 law that created an exception to Illinois’ former construction restriction for nuclear reactors with a maximum nameplate capacity of 300 megawatts, effective January 1, 2026.
Public Act 104-0458 — Clean and Reliable Grid Affordability Act — The 2026 law that removed Illinois’ remaining restriction on construction of larger nuclear reactors and made other changes involving energy planning, reliability, storage, efficiency, and grid policy.
Governor’s Office — Clean and Reliable Grid Affordability Act Signing — State summary of the major provisions of the 2026 energy legislation, including the change in nuclear-construction policy.
Public Act 102-0662 — Climate and Equitable Jobs Act — The 2021 energy law that established carbon-mitigation procurements supporting designated nuclear facilities and set broader Illinois clean-energy and workforce policies.
Public Act 99-0906 — Future Energy Jobs Act — The 2016 law that created Illinois’ original zero-emission-credit program for designated nuclear generation.
Illinois Power Agency — Clean and Reliable Grid Affordability Act Implementation — Current implementation information for Public Act 104-0458 and related energy-planning initiatives.
Illinois Power Agency — Resource Adequacy Planning — State studies and planning materials concerning electricity supply, demand, reliability, and possible resource needs.
Illinois Commerce Commission — e-Docket — Searchable filings, testimony, orders, and proceedings involving utility rates, carbon-mitigation programs, transmission, and other regulated energy matters.
Illinois Nuclear Safety & Emergency Preparedness
Illinois Emergency Management Agency and Office of Homeland Security — Nuclear & Radiation Safety — Illinois’ central resource for nuclear-facility safety, radiation protection, environmental monitoring, radioactive-material regulation, spent-fuel shipment inspection, and related programs.
IEMA-OHS — Nuclear Facility Safety — Information about state inspection, monitoring, and oversight associated with Illinois nuclear facilities.
IEMA-OHS — Environmental Monitoring Reports — State monitoring information concerning radiation levels near nuclear facilities and elsewhere in Illinois.
IEMA-OHS — Potassium Iodide Information — Information concerning potassium iodide availability and use in connection with nuclear emergency preparedness.
Ready Illinois — State emergency-preparedness information for residents, families, local governments, and organizations.
Federal Reactor Licensing & Oversight
U.S. Nuclear Regulatory Commission — Illinois Facilities — Direct links to NRC information for each operating Illinois reactor and facilities undergoing decommissioning.
NRC — Operating Nuclear Power Reactors — National operating-reactor information, oversight programs, inspection findings, performance indicators, and licensing resources.
NRC — Reactor License Renewal — Information concerning the federal process for extending the authorized operating period of an existing reactor.
NRC — Advanced Reactors — Licensing policy, technical review, applicant engagement, and rulemaking information for advanced reactors, including SMR and microreactor designs.
NRC — New Reactors — Information concerning design certification, early-site permits, combined licenses, construction oversight, and other new-reactor processes.
NRC — Reactor Oversight Process — Explanation of how the NRC evaluates safety performance at operating commercial reactors.
NRC — Emergency Preparedness — Federal requirements and responsibilities for nuclear-facility emergency planning and response.
NRC — ADAMS Public Documents — Search system for NRC license applications, inspection reports, correspondence, orders, environmental reviews, and other regulatory records.
Illinois Reactor & Electricity Data
U.S. Energy Information Administration — Illinois Electricity Profile — State electricity-generation, capacity, pricing, fuel-source, and emissions data.
U.S. Energy Information Administration — Nuclear Energy Data — National reactor generation, capacity, fuel, outage, and operating information.
NRC — Reactor Status Reports — Daily operating status and power levels reported for commercial reactors.
MISO — Markets, Planning & Operations — Regional-grid information relevant to Clinton and portions of Illinois served through MISO.
PJM Interconnection — Regional-market, capacity, transmission, and reliability information relevant to most of Illinois’ other operating nuclear stations.
Spent Fuel, Radioactive Waste & Decommissioning
NRC — Spent Fuel Storage — Federal regulation of spent-fuel pools, dry-cask storage, and independent spent-fuel storage installations.
NRC — High-Level Waste Disposal — Federal information concerning permanent disposal of spent nuclear fuel and other high-level radioactive waste.
NRC — Decommissioning of Nuclear Facilities — Requirements governing shutdown, cleanup, license termination, financial assurance, and public participation.
U.S. Department of Energy — Consent-Based Siting — Federal work concerning community participation in the siting of facilities for managing commercial spent nuclear fuel.
IEMA-OHS — Low-Level Radioactive Waste — Illinois information concerning the regulation and management of low-level radioactive waste.
Advanced Nuclear Research & Federal Support
U.S. Department of Energy — Office of Nuclear Energy — Federal research, development, demonstration, fuel-cycle, workforce, and advanced-reactor initiatives.
U.S. Department of Energy — Advanced Reactor Demonstration Program — Federal support for demonstrating advanced reactor technologies.
Idaho National Laboratory — Gateway for Accelerated Innovation in Nuclear — Technical and regulatory assistance supporting nuclear-energy innovators and developers.
NRC — Executive Order 14300 and ADVANCE Act Implementation — Information concerning changes to federal nuclear licensing, fees, mission, and advanced-reactor review.
Host Communities & Current Development Context
Capitol News Illinois — Nine Illinois Communities Express Interest in Nuclear Facilities — July 2026 reporting on preliminary interest from existing nuclear communities, former fossil-generation communities, and the University of Illinois.
U.S. Economic Development Administration — Nuclear Communities Initiative — Federal technical-assistance and economic-development information relevant to communities hosting or affected by nuclear facilities.
Related Illinois Capitol Group Policy Pages
Illinois Energy, Utility & Electric Grid Policy — Resource adequacy, regional markets, transmission, storage, utility rates, large loads, and natural-gas policy.
Illinois Advanced Technology & Innovation Policy — Data centers, advanced manufacturing, research commercialization, innovation incentives, and emerging technologies.
Illinois Property Tax Policy — Assessment, local revenue, tax-base, and economic-development issues relevant to nuclear host communities.
Illinois has six operating commercial nuclear stations containing eleven reactors: Braidwood, Byron, Clinton, Dresden, LaSalle, and Quad Cities. Together, these facilities constitute one of the nation’s largest state nuclear fleets and make nuclear energy Illinois’ leading source of electricity generation.
Illinois’ Operating Nuclear Fleet
The state’s operating facilities are:
Braidwood Generating Station — Units 1 and 2
Byron Generating Station — Units 1 and 2
Clinton Clean Energy Center — Unit 1
Dresden Generating Station — Units 2 and 3
LaSalle County Generating Station — Units 1 and 2
Quad Cities Generating Station — Units 1 and 2
Constellation Energy operates the six stations. Although all are located in Illinois, they do not participate in a single statewide electricity market. Clinton operates within the Midcontinent Independent System Operator region, commonly known as MISO. The five northern Illinois stations participate in PJM Interconnection.
MISO and PJM independently coordinate wholesale electricity markets, transmission planning, generation dispatch, and regional reliability. Consequently, the economics and reliability value of an Illinois nuclear station can be affected by conditions extending beyond Illinois, including regional electricity demand, capacity-market rules, transmission constraints, competing generation, fuel prices, and federal regulatory decisions.
How Nuclear Plants Serve Illinois Customers
Electricity from an Illinois nuclear station enters the interconnected regional grid rather than traveling exclusively to customers in the plant’s immediate community. Regional system operators generally dispatch available generating units according to market rules and operating conditions while maintaining the balance between electricity supply and demand.
ComEd, Ameren Illinois, municipal utilities, electric cooperatives, and competitive suppliers serve customers in different ways, but the presence of nuclear generation in Illinois does not mean that a particular utility customer receives electricity exclusively from a particular reactor. The physical grid and the financial arrangements used to purchase electricity are related but distinct systems.
This distinction is important when evaluating claims concerning a plant’s output, customer savings, or environmental attributes. A nuclear station may sell energy, capacity, clean-energy attributes, or other products through different arrangements, including regional markets, state programs, and private contracts.
Reliability and Resource Adequacy
Nuclear plants typically operate for long periods at high output, interrupted by planned refueling and maintenance outages or by unplanned operating events. Their ability to produce large quantities of electricity without depending on daily wind or sunlight makes the existing fleet an important component of Illinois and regional resource-adequacy planning.
Nuclear generation nevertheless is not a complete reliability strategy by itself. Individual reactors can experience outages, multiple units may share operational or environmental risks, and plant output still depends on transmission infrastructure capable of delivering electricity where it is needed. A reliable system requires a diverse portfolio of generation, storage, demand response, transmission, distribution infrastructure, and emergency operating tools.
Policymakers therefore consider both the reliability value of preserving existing nuclear capacity and the risks of excessive dependence on any single facility, technology, fuel, or transmission path.
Clean-Energy Role and Environmental Considerations
Nuclear reactors do not emit carbon dioxide while generating electricity. Continued operation of the existing fleet can therefore help Illinois maintain a large supply of carbon-free electricity while implementing the state’s clean-energy and emissions-reduction policies.
The environmental analysis is broader than operational carbon emissions, however. Nuclear facilities require uranium mining and fuel processing, cooling water, long-term management of radioactive materials, extensive security and emergency planning, and eventual decommissioning. Spent nuclear fuel remains stored at Illinois reactor sites because the United States has not established an operating permanent disposal repository.
Nuclear energy’s role in Illinois policy consequently involves several objectives that may reinforce or compete with one another: maintaining adequate electricity supply, reducing emissions, controlling customer costs, protecting public health and the environment, managing radioactive materials, and supporting workers and host communities.
Continued Operation, License Renewal and Uprates
Existing reactors may remain in operation only while meeting federal Nuclear Regulatory Commission requirements. The NRC oversees reactor licensing, inspections, enforcement, security, and license-renewal proceedings. License renewal does not guarantee that a facility will continue operating; owners must also determine that continued operation is technically and economically viable.
An operator may pursue additional license renewals, equipment upgrades, or a power uprate that increases a reactor’s authorized generating capacity. Each option involves plant-specific engineering, safety review, investment, and regulatory requirements. Extending or expanding an existing facility is therefore different from approving and constructing a new reactor, even when both approaches increase the amount of nuclear electricity available to the grid.
Issues to Monitor
Current policy questions concerning Illinois’ existing fleet include:
Whether each station remains economically viable in its applicable regional market;
How state clean-energy programs, wholesale-market revenues, and private contracts interact;
Whether additional license renewals or power uprates are proposed;
How planned and unplanned outages affect regional resource adequacy;
Whether growing electricity demand changes the value of preserving existing capacity;
How operating costs and policy-supported payments affect consumers;
Whether adequate transmission exists to deliver generation reliably;
How Illinois oversees emergency preparedness and environmental monitoring alongside federal regulation; and
How communities prepare for the economic, workforce, tax-base, decommissioning, and land-use consequences of eventual plant closure.
The continued operation of an existing reactor, public support for that reactor, and authorization of an entirely new nuclear facility are separate policy decisions. Each requires its own evaluation of reliability, cost, safety, environmental effects, and allocation of financial risk.
Sources & Further Reading:
U.S. Nuclear Regulatory Commission — Illinois Nuclear Facilities
U.S. Nuclear Regulatory Commission — Operating Reactor Oversight
U.S. Nuclear Regulatory Commission — Reactor License Renewal
U.S. Energy Information Administration — Illinois Electricity Profile
U.S. Energy Information Administration — Nuclear Energy Explained
Illinois Emergency Management Agency and Office of Homeland Security — Nuclear Safety
Illinois nuclear facilities can receive revenue from several distinct sources: sales through regional electricity markets, state-created clean-energy credit programs, federal tax incentives, and private contracts. These mechanisms should not be treated as interchangeable, and not every Illinois reactor participates in every program.
Wholesale Energy and Capacity Markets
Illinois nuclear plants sell electricity into either PJM Interconnection or the Midcontinent Independent System Operator, commonly known as MISO. Depending on the applicable market and the plant’s eligibility, a facility may receive revenue from:
Sales of electricity into day-ahead or real-time energy markets;
Capacity or resource-adequacy commitments;
Ancillary services that support reliable grid operation; and
Bilateral contracts with utilities, competitive suppliers, public entities, or private companies.
Wholesale-market revenues fluctuate with electricity demand, fuel prices, available generation, transmission conditions, market rules, and other regional factors. A nuclear plant may produce substantial quantities of electricity but still face financial pressure if market revenues do not cover its operating, capital, regulatory, security, and long-term maintenance costs.
Federal energy-market regulation and state environmental policy overlap in this area. The Federal Energy Regulatory Commission regulates interstate wholesale electricity markets, while Illinois may separately recognize environmental or public-policy attributes associated with carbon-free generation.
Illinois’ Zero-Emission Credit Program
The Future Energy Jobs Act of 2016 created Illinois’ Zero Emission Standard. The Illinois Power Agency subsequently procured zero-emission credits associated with the Clinton and Quad Cities nuclear facilities.
A zero-emission credit, or ZEC, represents the environmental attribute associated with one megawatt-hour of qualifying electricity generated without direct carbon emissions. Purchasing the credit does not mean that a customer receives the physical electricity produced by that specific facility.
The ZEC program was designed to preserve carbon-free generation at Clinton and Quad Cities after their owner announced plans to close the facilities. The program’s price incorporates statutory calculations rather than simply guaranteeing all plant costs or profits. Market-price adjustments can affect the value of the credits and the resulting cost to customers.
Clinton’s original state-supported ZEC arrangement is scheduled to conclude in 2027. The announced private agreement supporting Clinton after that point illustrates how a reactor may transition from one revenue arrangement to another rather than receive the same state support indefinitely.
CEJA and Carbon Mitigation Credits
The Climate and Equitable Jobs Act of 2021 established a separate Carbon Mitigation Credit program for nuclear facilities found to be at risk of closing. Following an Illinois Power Agency procurement, Carbon Mitigation Credit contracts were awarded for generation from Braidwood Units 1 and 2, Byron Units 1 and 2, and Dresden Units 2 and 3.
The contracts were intended to preserve existing carbon-free generation while Illinois expands renewable energy, storage, transmission, and other resources needed to implement the state’s longer-term clean-energy transition.
The program uses an indexed structure. Payments are affected by wholesale-market revenues and other specified sources of plant support. When market revenues are comparatively low, the program may produce a charge to customers. When applicable revenues rise above the statutory contract level, the calculation can require participating facilities to return value for customers.
This structure differs from a fixed subsidy that pays the same amount regardless of market conditions.
The Carbon-Free Energy Resource Adjustment
For ComEd customers, the financial results of the Carbon Mitigation Credit program appear through the Carbon-Free Energy Resource Adjustment, or CFRA. The CFRA is a per-kilowatt-hour charge or credit calculated under state law and the utility’s approved tariff.
The adjustment can change over time:
It may appear as a charge when covered plants’ applicable revenues fall below the program’s target level;
It may appear as a credit when applicable market revenues and other support exceed that level; and
Reconciliation adjustments may account for differences between projected and actual amounts.
The CFRA therefore should not automatically be described as either a permanent surcharge or a guaranteed customer refund. Its direction and size depend on current calculations. A period in which customers receive credits does not eliminate the program, just as a period containing charges does not establish that the same charge will continue indefinitely.
Because the adjustment can move materially with market conditions, current utility tariffs and Illinois Power Agency explanations are more reliable than an older article or a single historical bill example.
Federal Support and Customer Calculations
Federal law also provides a production tax credit for electricity generated by qualifying existing nuclear facilities. The federal credit is generally adjusted according to a facility’s gross receipts, making its value sensitive to the revenue earned by the plant.
Federal support can interact with Illinois’ indexed state programs. If a qualifying plant receives additional federal assistance or higher market revenue, those amounts may reduce the support required under the applicable state formula or increase value returned to customers. The precise result depends on the governing statute, contract, tariff, eligibility requirements, and calculation period.
Consequently, a statement that a plant receives both state and federal support does not by itself establish that the two programs provide duplicative payments of equal value.
Private Contracts and the Clinton–Meta Agreement
In June 2025, Constellation and Meta announced a 20-year power-purchase agreement supporting the Clinton Clean Energy Center beginning in June 2027, after the expiration of Clinton’s existing Illinois ZEC program.
According to the companies, the agreement is intended to support Clinton’s continued operation, preserve the plant’s carbon-free output, and enable an approximately 30-megawatt increase in generating capacity. The financial terms were not publicly disclosed.
The agreement does not require a dedicated transmission line carrying Clinton’s electricity directly to a particular Meta data center. Electricity continues to enter the regional grid, while the contract governs the parties’ financial arrangement and allocation of specified energy or environmental attributes.
Private nuclear agreements may offer several potential benefits:
Longer-term revenue certainty for an existing plant;
Support for relicensing, maintenance, or additional generating capacity;
Carbon-free-energy attributes for a corporate purchaser;
Reduced reliance on a new state-supported contract; and
Continued employment, tax revenue, and economic activity in the host community.
They also raise policy questions about transparency, transmission and interconnection constraints, allocation of clean-energy attributes, the effect of large-load growth on other customers, and whether private demand for carbon-free electricity changes the need for public support.
Evaluating Nuclear-Support Proposals
When evaluating a current or proposed nuclear-support mechanism, policymakers and stakeholders should ask:
Which reactor or generating units qualify?
Is the mechanism a wholesale-market payment, state credit, federal tax benefit, or private contract?
What obligation does the plant assume in exchange for the support?
How long does the arrangement last?
Does the payment vary with market prices, federal benefits, or other revenues?
Who bears the cost and who receives any resulting credit?
Are costs, revenues, and contractual terms publicly available?
Does the arrangement preserve existing capacity, increase plant output, or finance a new facility?
How are environmental attributes assigned and counted?
What consumer, workforce, host-community, and reliability consequences would follow if the facility closed?
What risks remain with customers, taxpayers, the plant owner, or a private purchaser?
These distinctions are increasingly important as Illinois moves from emergency measures intended to prevent announced reactor closures toward a mix of market revenue, federal incentives, private clean-energy agreements, and possible new nuclear development.
Sources & Further Reading:
Illinois Power Agency — May 2026 Explanation of the Carbon-Free Energy Resource Adjustment
Illinois Power Agency — Carbon Mitigation Credit Procurement Plan
Illinois Power Agency — Zero Emission Standard Procurement Plan
Illinois Commerce Commission — Electricity Proceedings and e-Docket
Internal Revenue Service — Zero-Emission Nuclear Power Production Credit
Midcontinent Independent System Operator — Markets and Operations
Constellation — Meta Agreement Supporting the Clinton Clean Energy Center
Illinois has moved from prohibiting most new nuclear construction to permitting consideration of reactors of all sizes. That policy change creates a pathway for proposed projects, but it does not itself approve a reactor, select a site, guarantee financing, authorize customer charges, or replace federal and local review.
Illinois’ Two-Step Change in Nuclear Policy
Illinois established a moratorium on new nuclear-plant construction in 1987. The restriction generally prevented construction from beginning until the federal government identified and approved a demonstrable method for permanently disposing of high-level nuclear waste.
The General Assembly subsequently changed that policy in two stages:
Public Act 103-0569 authorized construction of new nuclear reactors with a nameplate capacity of 300 megawatts or less beginning January 1, 2026. It also directed the Illinois Emergency Management Agency and Office of Homeland Security to develop rules addressing issues such as reactor regulation, fees, emergency preparedness, and decommissioning.
Public Act 104-0458, the Clean and Reliable Grid Affordability Act, took effect June 1, 2026 and removed the remaining restriction applicable to reactors exceeding 300 megawatts.
Illinois law therefore no longer imposes the former categorical barrier to new commercial reactors. A developer must nevertheless complete the applicable federal licensing process and satisfy state and local requirements before construction and operation can proceed.
Conventional Reactors, SMRs and Microreactors
“New nuclear” can refer to substantially different technologies and project scales.
A conventional large reactor generally produces hundreds of megawatts to more than one gigawatt of electricity from a single unit. Large reactors can provide substantial generating capacity, but recent U.S. projects have involved long development schedules, significant capital requirements, and substantial construction and financing risk.
A small modular reactor, or SMR, is designed to produce less electricity per module than a conventional large reactor. Illinois law uses a threshold of 300 megawatts or less for the smaller reactors initially authorized by Public Act 103-0569. Some projects may combine multiple modules at one site, meaning the facility’s total output could exceed the capacity of one module.
The term “modular” generally refers to the anticipated use of standardized components and factory fabrication rather than proving that a project will necessarily be inexpensive or quick to construct. Actual cost and schedule advantages will depend on successful licensing, manufacturing scale, supply chains, project management, financing, and repeated deployment.
A microreactor is an even smaller advanced reactor, generally intended to serve a more localized need. Potential applications include universities, research campuses, military installations, remote communities, industrial operations, or other facilities seeking continuous electricity or heat. Definitions and proposed capacities vary, and a microreactor remains subject to nuclear-safety, security, fuel, waste, and licensing requirements despite its smaller size.
SMRs and microreactors should not be treated as interchangeable. They may use different fuels, coolants, safety systems, operating models, and licensing approaches and may serve very different customers.
State Planning for Additional Nuclear Capacity
Executive Order 2026-01 directed Illinois agencies to accelerate the evaluation of safe new nuclear generation. The order established an interagency process involving the Illinois Power Agency, Illinois Commerce Commission, Department of Commerce and Economic Opportunity, Illinois Environmental Protection Agency, Department of Natural Resources, Illinois Emergency Management Agency and Office of Homeland Security, Department of Labor, the University of Illinois System, and other agencies as needed.
The process examines possible new generation or uprates totaling at least two gigawatts, with construction beginning by 2033. Among other subjects, the order calls for consideration of:
Potential developers and technologies;
Communities interested in hosting facilities;
Project costs and financing structures;
Effects on residential ratepayers;
Federal licensing and regulatory requirements;
Workforce and supply-chain needs;
Environmental and natural-resource considerations;
Emergency preparedness and public safety;
Waste management and decommissioning; and
Opportunities to increase output at existing nuclear facilities.
Illinois subsequently received expressions of interest from several communities and institutions regarding possible nuclear development. An expression of interest is an invitation for further evaluation—not a siting approval, construction commitment, or finding that a location is suitable for a particular reactor.
The state’s two-gigawatt objective similarly represents a planning goal. It is not evidence that two gigawatts of new capacity have been licensed, financed, placed under construction, or included in customer rates.
Federal Licensing Remains Essential
The U.S. Nuclear Regulatory Commission has primary responsibility for licensing the construction and operation of commercial nuclear reactors. Depending on the project and licensing pathway, federal review may address:
Reactor design and safety systems;
Site characteristics and environmental impacts;
Construction and operating authority;
Security and safeguards;
Emergency planning;
Operator qualifications;
Nuclear materials and fuel;
Quality assurance and inspections; and
Decommissioning and financial assurance.
A reactor developer may pursue design certification, an early site permit, a construction permit and operating license, or a combined license, depending on the applicable federal framework. Preliminary discussions with regulators or approval of a reactor design do not authorize construction at a specific Illinois site.
The NRC is also developing and implementing licensing approaches tailored to advanced reactors. That work may affect future project schedules, but an effort to streamline review does not eliminate the requirement to demonstrate compliance with federal safety standards.
State and Local Roles
Federal licensing does not displace every state or local decision. Depending on the project, Illinois agencies and local governments may address matters including:
Emergency preparedness and radiological monitoring;
Water withdrawal, discharge, and environmental permits;
Roads, transmission, and other supporting infrastructure;
Workforce development and labor standards;
Property taxation and economic-development agreements;
Local land use, zoning, and construction requirements;
Police, fire, emergency-medical, and mutual-aid capacity;
Decommissioning responsibilities; and
Community engagement and host-community impacts.
The precise division of authority will depend on federal preemption principles, state statutes, the reactor technology, site ownership, and the permits or financial support requested. A community’s willingness to host a project does not waive federal or state requirements.
Development Does Not Equal Deployment
Before a proposed reactor produces electricity, a developer may need to complete years of technical, regulatory, commercial, and construction work. Important milestones can include:
Selecting a reactor technology and prospective site;
Establishing control of the site and access to cooling, transmission, and supporting infrastructure;
Completing federal pre-application and licensing activities;
Obtaining state and local approvals that are not federally preempted;
Securing fuel and a qualified supply chain;
Negotiating interconnection and transmission arrangements;
Establishing a creditworthy owner, operator, and construction team;
Securing financing and allocating cost-overrun risk;
Completing construction, inspections, testing, and fuel loading; and
Receiving authorization to operate.
A vendor announcement, memorandum of understanding, feasibility study, community letter, or regulatory pre-application meeting may be meaningful, but none should be presented as an operating project.
Key Policy Questions
As Illinois evaluates new nuclear development, policymakers and communities should consider:
Is the technology commercially demonstrated, under construction elsewhere, or still in development?
Has the NRC approved the reactor design or accepted a project-specific application?
Who will finance development and construction?
Who bears the risk of delay, cancellation, or cost overruns?
Would costs be recovered from ratepayers, taxpayers, private purchasers, investors, or some combination?
How does the expected cost compare with other combinations of generation, storage, transmission, and demand management?
When could the project realistically begin commercial operation?
What transmission or interconnection upgrades would be required?
What water, land, environmental, security, and emergency-response resources would be needed?
Is an adequate workforce and domestic supply chain available?
How will spent fuel and other radioactive materials be managed?
What decommissioning and financial-assurance requirements will apply?
What tax revenue, jobs, infrastructure demands, and other effects would the host community experience?
Could an uprate or expansion at an existing site provide capacity sooner or at lower risk than an entirely new facility?
New nuclear energy may offer firm carbon-free generation, economic-development opportunities, and an additional option for meeting growing electricity demand. Its ultimate role in Illinois will depend on whether particular projects can demonstrate safety, commercial readiness, affordability, community support, and a credible allocation of financial risk.
Sources & Further Reading:
Public Act 103-0569 — Authorization for Reactors of 300 Megawatts or Less
Public Act 104-0458 — Clean and Reliable Grid Affordability Act
Executive Order 2026-01 — Accelerating New Safe Nuclear Generation in Illinois
Illinois General Assembly — Executive Order 2026-01 Status and Agency Responsibilities
Illinois Emergency Management Agency and Office of Homeland Security — Nuclear Safety
U.S. Nuclear Regulatory Commission — Pre-Application Activities for Advanced Reactors
Legal authority to construct a nuclear reactor does not determine whether a project is economically feasible or who will pay for it. A project’s consequences for Illinois consumers depend on its ownership, financing, contracts, public incentives, construction performance, and treatment under state and federal law.
A privately financed reactor whose investors bear development risk presents a different consumer question from a utility-owned facility whose approved costs are recovered through electric rates. Before describing any proposal as privately funded, ratepayer supported, or publicly financed, the complete project structure must be examined.
Why Financing Matters
New nuclear projects generally require substantial investment before they produce electricity or operating revenue. Development expenses may include:
Reactor design and engineering;
Federal licensing and environmental review;
Site acquisition and preparation;
Cooling, water, security, and emergency-response infrastructure;
Transmission and interconnection facilities;
Specialized components, fuel, and supply-chain development;
Construction labor and project management;
Interest and other financing costs during development;
Testing, commissioning, and operator training;
Insurance and financial assurance; and
Future decommissioning and spent-fuel obligations.
The length of the development and construction period can materially affect total cost. Interest accumulates while capital is committed, and delays can increase labor, material, contractor, and financing expenses before the project sells electricity.
For this reason, the initial estimated construction price is not the only relevant figure. Policymakers should also evaluate financing costs, contingencies, transmission expenses, long-term operating costs, fuel, decommissioning, and the consequences of delay or cancellation.
Potential Ownership and Financing Models
A proposed Illinois reactor could use one or more financing structures.
Merchant or investor-owned development. A private developer may finance a project with investor equity and private debt, expecting to recover its investment through wholesale electricity markets, capacity payments, environmental attributes, and commercial contracts. Investors initially bear more development and market risk, although the developer may later seek public incentives, customer-backed contracts, tax benefits, or loan guarantees.
Private power-purchase agreements. A data center operator, manufacturer, university, municipality, or other large purchaser may contract for electricity or clean-energy attributes over an extended period. A creditworthy purchaser can improve a project’s ability to obtain financing. The agreement may reduce direct exposure for ordinary utility customers, but its broader effects on transmission, resource adequacy, market prices, and infrastructure costs still require evaluation.
Utility ownership and rate recovery. A regulated utility could propose owning or purchasing an interest in a facility and recovering approved costs from customers. Depending on the governing legislation and regulatory structure, recovery could occur after the plant begins service or include specified costs incurred during construction. This model can lower financing costs by providing more predictable revenue, but it may shift construction, cancellation, and performance risks toward customers.
State-created credits or contracts. Illinois could establish a credit, procurement, contract-for-differences, or other payment mechanism supporting new nuclear generation. The customer effect would depend on the payment formula, project eligibility, market-price adjustments, contract duration, and whether excess revenues are returned to customers.
Public or municipal ownership. Municipal utilities, joint-action agencies, public authorities, or other governmental entities could participate in a project. Public ownership may provide access to different financing tools, but participating communities may assume long-term debt, contractual commitments, or responsibility for their share of project costs.
Federal assistance. Federal support may include grants, cost-sharing, tax credits, loan guarantees, direct loans, research partnerships, fuel assistance, or demonstration-program funding. Federal assistance can reduce project cost or financing risk, but it does not necessarily eliminate exposure for Illinois customers, taxpayers, private purchasers, or investors.
Projects may combine several of these approaches. The financing should therefore be evaluated as a complete package rather than by highlighting only its most favorable component.
Construction and Completion Risk
A central financing question is who pays if a reactor costs more or takes longer to complete than originally projected.
Risk-allocation tools can include:
Fixed-price or cost-sharing construction contracts;
Performance guarantees;
Parent-company guarantees;
Contingency reserves;
Milestone-based payments;
Cost caps;
Independent engineering reviews;
Prudence reviews by regulators;
Disallowance of specified costs;
Developer equity requirements; and
Cancellation or exit rights for purchasers.
A contract described as “fixed price” may still contain exceptions, escalation provisions, change-order rights, or force-majeure protections. Similarly, a cost cap is only as reliable as the contractual obligations and financial capacity of the party responsible for costs above the cap.
If a developer or contractor cannot absorb an overrun, pressure may arise for additional public support, revised customer charges, or project cancellation. Policymakers should therefore evaluate both the written allocation of risk and the ability of each party to honor that allocation.
First-of-a-Kind and Modular-Reactor Risk
SMRs and microreactors are intended to reduce some challenges associated with very large construction projects through smaller units, standardized designs, and factory fabrication. These features could permit incremental deployment and reduce the amount of capital committed to each module.
Those potential advantages are not guaranteed. Early projects may bear costs associated with design completion, federal licensing, new manufacturing facilities, supply-chain development, specialized fuel, and limited operating experience. A first commercial unit may cost more than later units even if repeated production eventually produces savings.
Cost estimates should therefore identify whether they describe:
A demonstration or first-of-a-kind project;
A later unit based on assumed factory-scale production;
One reactor module or a multi-module facility;
Construction cost alone or total financed cost;
The reactor itself or the complete site and transmission project; and
A vendor estimate, an independent estimate, or a binding contractual price.
Comparisons that use an assumed future cost for a mature SMR fleet while using current complete-system costs for other resources can be misleading. Comparisons should use consistent assumptions concerning financing, reliability, transmission, storage, fuel, operating life, and system value.
When Costs May Reach Customers
A nuclear project does not affect customer bills merely because it is located in Illinois. Customer exposure can arise, however, if legislation, an Illinois Commerce Commission order, a utility tariff, or an approved procurement requires utilities or customers to fund the project or purchase its output.
Potential customer charges could include:
Construction or financing charges;
Utility rate-base recovery;
Long-term energy or capacity contract payments;
Nuclear or carbon-free-energy credits;
Transmission and interconnection upgrades;
Grid-reliability or resource-adequacy charges;
Cost reconciliation or balancing adjustments; and
Decommissioning or other approved long-term obligations.
A proposal should identify which customer classes would pay, when charges would begin, whether customers pay before commercial operation, and what happens if the project is delayed, produces less electricity than expected, or never enters service.
It should also disclose whether customers share in benefits when wholesale prices, federal support, plant output, or other revenues exceed projections.
Affordability and Consumer Protections
Executive Order 2026-01 directs Illinois’ new-nuclear evaluation to consider benefits for residential ratepayers. A credible affordability analysis should address more than the reactor’s projected generation cost.
Relevant protections may include:
Competitive project selection;
Independent cost and engineering review;
Transparent contract terms and assumptions;
Enforceable construction milestones;
Limits on pre-operational cost recovery;
Cost caps and overrun protections;
Developer or shareholder contributions;
Periodic prudence review;
Reconciliation of market and federal revenues;
Customer credits when revenues exceed agreed levels;
Performance standards and availability requirements;
Off-ramps if costs or schedules exceed stated limits; and
Protections for low-income and other vulnerable customers.
Long-term contracts can provide price stability, but they also can obligate customers to pay an above-market price if technologies or market conditions change. Shorter or market-dependent arrangements reduce long-term commitment but may not provide sufficient certainty to finance a capital-intensive project. The appropriate balance depends on the project and the risks Illinois is being asked to assume.
Comparing Costs and System Value
The lowest projected cost per megawatt-hour does not necessarily identify the best resource, but neither does a resource’s reliability value resolve whether its price is reasonable.
A useful comparison should consider:
Expected energy and dependable capacity;
Construction and commercial-operation dates;
Financing assumptions and cost of capital;
Operating life and expected availability;
Fuel-price and supply-chain risk;
Transmission and interconnection requirements;
Ability to operate during peak or emergency conditions;
Environmental attributes;
Flexibility and compatibility with other grid resources;
Decommissioning and waste-management obligations; and
The cost and reliability of reasonable alternatives.
Nuclear generation may provide long-lived, firm, carbon-free capacity. Other combinations of generation, storage, demand response, efficiency, and transmission may offer different costs, timelines, operating characteristics, and risks. Illinois’ analysis should compare complete portfolios capable of providing the required services rather than comparing technologies on a single favorable metric.
Questions for Any Illinois Financing Proposal
Before Illinois authorizes financial support for a new reactor, policymakers and stakeholders should ask:
What is the complete estimated project cost, including financing and transmission?
Is the reactor design commercially demonstrated?
Who provides the initial development capital?
Who pays if the project is delayed, cancelled, or over budget?
Are customer payments permitted before the plant begins operating?
What federal incentives are assumed, and what happens if they change?
Are cost estimates independently reviewed?
Which costs are fixed and which remain subject to escalation?
What performance guarantees apply?
Who owns the project and its environmental attributes?
How long are customers or purchasers committed?
Can customers receive credits from higher-than-expected market revenue?
What happens if electricity demand grows more slowly than forecast?
How are decommissioning and spent-fuel costs funded?
Are host-community benefits included in the project cost?
What less costly or faster alternatives were considered?
What information will remain confidential, and what will be publicly disclosed?
The central policy issue is not simply whether Illinois can authorize a new reactor. It is whether a specific project delivers sufficient reliability, clean-energy, economic, and community benefits to justify its cost—and whether the parties best able to manage each risk are contractually responsible for it.
Sources & Further Reading:
Executive Order 2026-01 — Accelerating New Safe Nuclear Generation in Illinois
U.S. Department of Energy Loan Programs Office — Nuclear Energy
U.S. Department of Energy — Advanced Reactor Demonstration Program
Internal Revenue Service — Clean Electricity Production Credit
Internal Revenue Service — Clean Electricity Investment Credit
Federal Energy Regulatory Commission — Electric Power Markets
Midcontinent Independent System Operator — Generator Interconnection
A decision to consider nuclear energy in Illinois does not place one agency in charge of every aspect of a project. Federal, state, regional, and local entities have different responsibilities involving reactor safety, environmental protection, emergency preparedness, transmission, land use, infrastructure, and public participation.
Approval from one entity does not substitute for approvals required from others. A favorable grid study, for example, is not a nuclear-safety license, and a federal reactor license does not necessarily resolve every state environmental permit or local infrastructure issue.
U.S. Nuclear Regulatory Commission
The U.S. Nuclear Regulatory Commission, or NRC, has primary authority over the radiological safety and security of commercial nuclear reactors. Its responsibilities include review and oversight of:
Reactor designs and safety systems;
Proposed sites and site-specific hazards;
Construction and operating authority;
Nuclear fuel and radioactive materials;
Physical security and safeguards;
Cybersecurity requirements;
Operator licensing;
Quality assurance;
Onsite emergency planning;
Inspections and enforcement;
Changes to licensed facilities; and
Decommissioning and financial assurance.
A proposed reactor may proceed through different licensing pathways. These can include a design certification, early site permit, construction permit and operating license, or combined license. Some approvals can resolve a particular issue in advance, but they do not necessarily authorize the complete project.
For example, an early site permit may address the suitability of a location before a developer selects a final reactor design. A design certification approves a standardized design for later reference. Construction at a particular site still requires the applicable project-specific authorization.
Pre-application meetings, regulatory engagement, or NRC acceptance of an application indicate that review is underway; they are not findings that the project is safe to construct or operate.
Federal Environmental Review
The NRC must comply with the National Environmental Policy Act when taking major licensing actions. Depending on the project, its environmental review may examine:
Land use and ecological resources;
Surface water and groundwater;
Cooling-water needs;
Radiological and nonradiological impacts;
Air quality;
Historic and cultural resources;
Environmental justice;
Transportation of fuel and radioactive materials;
Waste management;
Severe-accident considerations;
Transmission-related impacts; and
Reasonable alternatives.
An NRC environmental review informs the federal licensing decision but does not automatically replace every permit administered by another federal or state agency.
Other federal approvals may be required for matters such as wetlands, navigable waters, endangered species, historic resources, or federally owned property. The specific requirements depend on the site and project design.
Illinois Nuclear-Safety Oversight
The Illinois Emergency Management Agency and Office of Homeland Security, commonly known as IEMA-OHS, administers the state’s nuclear-safety and radiation-protection responsibilities.
For Illinois’ existing commercial reactors, state functions include environmental radiological monitoring, coordination with federal and local agencies, participation in emergency exercises, review of preparedness arrangements, and inspection of certain radioactive-material or spent-fuel transportation activities.
Public Act 103-0569 also directed IEMA-OHS to establish requirements relevant to newly authorized smaller reactors, including matters involving:
State regulatory fees;
Emergency preparedness;
environmental monitoring; and
Decommissioning and financial assurance.
The NRC retains primary authority over reactor safety. Illinois’ role supplements federal oversight through state radiation-protection, monitoring, preparedness, environmental, and public-safety responsibilities.
Environmental and Natural-Resource Agencies
A nuclear facility can require state and federal environmental approvals separate from the NRC license.
The Illinois Environmental Protection Agency may administer permits or certifications concerning:
Water discharges under the National Pollutant Discharge Elimination System;
Construction stormwater;
Air emissions from nonreactor equipment;
Drinking-water or wastewater facilities;
Groundwater protection;
Waste streams outside exclusive federal nuclear regulation; and
State water-quality certification associated with a federal permit.
Cooling-water demand can be a significant siting consideration. The project may need to evaluate water availability, intake structures, consumptive use, thermal discharges, aquatic effects, drought conditions, and competing community or ecological needs.
The Illinois Department of Natural Resources may have responsibilities involving water use, floodways, wetlands, endangered species, natural areas, historic resources, or other matters within its statutory jurisdiction. The U.S. Army Corps of Engineers and other federal agencies also may participate where a project affects wetlands, waterways, or federally regulated resources.
The precise permits depend on the reactor design, cooling system, site, construction plan, and associated infrastructure.
Regional Grid and Transmission Review
A project seeking to deliver electricity to the regional transmission system must proceed through the applicable interconnection process administered by PJM Interconnection or MISO.
The regional grid operator studies whether the proposed facility can connect without compromising transmission-system reliability. Studies may identify:
Required interconnection facilities;
Network transmission upgrades;
Protection and control systems;
Stability or voltage concerns;
Construction sequencing;
Allocation of upgrade costs; and
Milestones and financial-security requirements.
A completed interconnection study does not establish that a reactor satisfies NRC safety requirements or state environmental law. Conversely, an NRC license does not guarantee that adequate transmission will be available on the project’s preferred schedule or at its estimated cost.
Transmission planning can materially affect whether a proposed facility is commercially viable and when its output could reach customers.
Local Government and Host-Community Roles
Federal law limits the ability of states and local governments to regulate nuclear safety where authority has been assigned to the NRC. Local decisions cannot impose a separate reactor-safety standard that conflicts with federal regulation.
Local governments may nevertheless have important responsibilities involving matters outside the federally preempted field. Depending on Illinois law, the project, and the location, those responsibilities may include:
Land-use and zoning procedures;
Building, road, and construction coordination;
Water, sewer, and other public infrastructure;
Police, fire, emergency-medical, and mutual-aid services;
Evacuation routes and traffic management;
Property taxation and economic-development agreements;
Local workforce and housing effects;
Public hearings and community engagement; and
Long-term land-use planning.
Whether a particular local requirement applies must be evaluated individually. A community’s expression of interest in hosting a reactor does not constitute zoning approval, waive environmental review, or commit local taxpayers to infrastructure or emergency-response costs.
Emergency Preparedness
Emergency preparedness for a commercial reactor is shared among the operator, NRC, Federal Emergency Management Agency, IEMA-OHS, and affected local governments.
The reactor operator is responsible for the onsite emergency plan. The NRC reviews onsite preparedness and considers whether adequate protective measures can be implemented.
FEMA evaluates offsite state and local radiological emergency plans and preparedness. Illinois and affected local governments plan for public warning, emergency communications, protective actions, evacuation or sheltering, traffic control, medical response, reception centers, and coordination with schools, hospitals, long-term-care facilities, correctional facilities, and other community institutions.
For the existing large light-water-reactor fleet, emergency planning has traditionally included:
A plume-exposure planning zone extending approximately 10 miles from the reactor; and
An ingestion-pathway planning zone extending approximately 50 miles.
Those distances should not automatically be applied to every proposed advanced reactor. Federal regulations allow emergency-planning requirements for certain SMRs and other new technologies to be informed by the reactor’s design, source term, accident analysis, and site characteristics. The NRC must determine the applicable planning basis for a specific project.
A smaller emergency-planning zone does not eliminate the need for coordination with local first responders or state agencies.
Exercises, Public Communication and Potassium Iodide
Preparedness is an ongoing responsibility rather than a one-time licensing document. Plans must be maintained, personnel trained, communications tested, and exercises conducted.
Effective planning should address:
Clear authority among participating agencies;
Reliable warning and notification systems;
Accessible communication for people with disabilities or limited English proficiency;
Transportation assistance for residents without vehicles;
Plans for schools, hospitals, nursing facilities, and congregate settings;
Responder equipment, training, and radiation protection;
Coordination across county and municipal boundaries;
Evacuation-route capacity and severe-weather contingencies;
Public instructions for sheltering or evacuation; and
Procedures for monitoring, decontamination, and recovery.
IEMA-OHS provides information concerning potassium iodide, or KI, for eligible residents near Illinois nuclear stations. KI can help protect the thyroid from radioactive iodine when taken under official direction. It does not protect against every radioactive material and is not a substitute for evacuation, sheltering, or other instructions from emergency officials.
Safety Oversight After Licensing
NRC oversight continues after a reactor begins operation. The agency uses inspections, performance indicators, enforcement tools, event reporting, and other regulatory processes to evaluate plant performance.
Illinois also continues environmental monitoring and emergency-preparedness activities. Local agencies maintain response plans and participate in training or exercises.
A licensed reactor may need additional approval for certain changes, including power uprates, license amendments, license renewal, spent-fuel-storage activities, or eventual decommissioning. Authorization to operate is therefore not the end of regulatory oversight.
Questions for a Proposed Illinois Site
Before treating a location as a viable nuclear site, stakeholders should ask:
Has a specific reactor technology been selected?
What NRC approval has been requested or obtained?
Has the applicant secured control of the site?
What natural and human-caused hazards require evaluation?
How much water will the project require, and what discharges will occur?
What federal and state environmental permits are necessary?
Which regional grid operator will study the interconnection?
What transmission upgrades will be required and who will pay?
What emergency-planning zone is supported by the reactor’s safety analysis?
Which state and local agencies must expand staff, training, equipment, or facilities?
How will emergency plans address vulnerable populations?
What local land-use and infrastructure approvals apply?
How will the public receive accessible information and opportunities to participate?
What financial assurance supports emergency preparedness and decommissioning?
How will responsibilities change if the project is delayed, cancelled, or transferred to another owner?
A prospective site should not be evaluated solely on public support, existing transmission, or proximity to a former or operating power plant. A credible siting process must integrate federal safety review, environmental conditions, grid requirements, emergency-response capacity, community effects, and long-term stewardship.
Sources & Further Reading:
U.S. Nuclear Regulatory Commission — Combined License Applications
U.S. Nuclear Regulatory Commission — Reactor Oversight Process
U.S. Nuclear Regulatory Commission — Emergency Preparedness for Nuclear Power Reactors
Federal Emergency Management Agency — Radiological Emergency Preparedness Program
Illinois Department of Natural Resources — Office of Water Resources
U.S. Army Corps of Engineers — Regulatory Program and Permits
A nuclear facility’s obligations do not end when electricity generation stops. Spent fuel must remain safely stored, radioactive structures must be decontaminated or dismantled, waste must be managed, and the site must be monitored until applicable regulatory requirements are satisfied.
These responsibilities involve different materials, timelines, funding sources, and government agencies. “Nuclear waste” should not be used as though it describes one uniform category or one regulatory process.
Spent Nuclear Fuel
Commercial nuclear reactors use fuel containing uranium to generate heat and electricity. After fuel assemblies can no longer efficiently sustain reactor operations, they are removed from the reactor and classified as spent nuclear fuel.
Spent fuel remains highly radioactive and continues to produce heat. It initially is stored underwater in a reinforced spent-fuel pool, where water provides cooling and radiation shielding.
After the fuel has cooled sufficiently, an operator may transfer it to a dry-cask storage system. In dry storage, sealed canisters containing spent fuel are surrounded by steel, concrete, or other shielding and placed at a secured facility known as an independent spent-fuel storage installation, or ISFSI.
Dry-cask storage is designed for monitored storage; it is not permanent geological disposal.
Storage Is Not Disposal
Storage preserves spent fuel in a controlled and retrievable condition pending transport, reuse if federal policy permits, or final disposal. Disposal is intended to isolate the material permanently without relying on continuing retrieval or active management in the same manner.
The federal government has not opened a permanent repository for commercial spent nuclear fuel. As a result, spent fuel remains stored at operating and retired reactor sites throughout the country, including sites in Illinois.
Onsite storage does not mean the fuel is unregulated. The U.S. Nuclear Regulatory Commission licenses and oversees spent-fuel pools, dry-cask designs, storage facilities, security, inspections, and related safety requirements.
The absence of a permanent repository nevertheless means that communities hosting reactors may continue hosting spent fuel long after electricity generation and most plant employment have ended.
Federal Responsibility for Long-Term Disposal
Under the Nuclear Waste Policy Act, the federal government has primary responsibility for developing a system for disposing of commercial spent nuclear fuel and high-level radioactive waste. Nuclear utilities entered contracts and paid fees into the federal Nuclear Waste Fund in anticipation that the U.S. Department of Energy would begin accepting spent fuel.
Because the federal government did not begin acceptance as contemplated, spent fuel has remained at reactor sites and the federal government has faced contractual liability for certain storage costs.
Federal policymakers continue to consider consolidated interim storage and permanent geologic disposal. The Department of Energy also has pursued a consent-based siting process intended to involve willing communities, governments, and Tribal nations in evaluating possible federal consolidated interim-storage facilities.
Consolidated interim storage and permanent disposal are different concepts:
Consolidated interim storage would move spent fuel from multiple reactor sites to one or more centralized storage facilities for a limited but potentially extended period.
A permanent repository would place spent fuel or high-level waste in a facility designed for long-term geological isolation.
Neither concept should be presented as an operating national disposal solution until the necessary facility has been authorized, licensed, constructed, and opened.
Transportation of Spent Fuel
Moving spent fuel from an Illinois reactor site would require certified transportation packages, route and security planning, coordination among federal, state, Tribal, and local authorities, and compliance with NRC and U.S. Department of Transportation requirements.
IEMA-OHS has responsibilities involving coordination and inspection of certain radioactive-material shipments through Illinois. State police, emergency-management agencies, fire departments, emergency-medical providers, transportation agencies, and local governments also may participate in preparedness and response planning.
The ability to transport spent fuel safely is separate from the question of whether an authorized destination exists and is ready to receive it.
Low-Level Radioactive Waste Is Different
Reactor operations and decommissioning also generate low-level radioactive waste. Examples can include contaminated protective clothing, filters, resins, tools, piping, concrete, and other materials.
Low-level waste is not the same as spent nuclear fuel or high-level radioactive waste. Its classification, handling, packaging, transportation, storage, and disposal are governed by different requirements.
Decommissioning can generate a substantial volume of low-level waste as equipment and structures are dismantled. Disposal options depend on the waste’s classification, the facility authorized to receive it, interstate compact arrangements, and applicable federal and state law.
Illinois’ responsibilities for radioactive-material and low-level-waste regulation do not transfer federal responsibility for commercial spent-fuel disposal to the state.
What Decommissioning Means
When a commercial reactor permanently ceases operation, the operator must notify the NRC, submit required planning and cost information, maintain security and spent-fuel protections, and proceed under federal decommissioning requirements.
The NRC recognizes principal decommissioning approaches that include:
DECON: Radioactive equipment, structures, and portions of the facility are removed or decontaminated relatively soon after shutdown.
SAFSTOR: The facility is maintained in a monitored condition for a period before final decontamination and dismantlement.
ENTOMB: Radioactive materials are encased in structurally long-lived material until radioactivity decays to levels permitting release. This method is not commonly used for U.S. commercial reactors and would require regulatory approval.
A facility may use a combination of activities consistent with its approved approach. NRC regulations generally require decommissioning to be completed within 60 years after permanent cessation of operations unless the Commission approves a longer period for specified reasons.
Retirement of the generating unit and termination of the NRC reactor license are therefore separate milestones. A site can remain under an NRC license for decades after it stops producing electricity.
Decommissioning Funding Assurance
NRC regulations require commercial reactor licensees to demonstrate financial assurance for radiological decommissioning. Operators periodically report the status of their decommissioning funds, and the NRC may require corrective action if funding assurance is inadequate.
A nuclear decommissioning trust is generally intended to pay qualifying costs of removing radioactive contamination and terminating the NRC license. It should not automatically be assumed to cover every post-closure expense.
Potential obligations outside the minimum radiological-decommissioning estimate may include:
Managing spent fuel until the federal government accepts it;
Dismantling nonradiological structures;
Conventional environmental remediation;
Demolishing cooling towers or other facilities;
Restoring roads, utilities, shorelines, or other property;
Maintaining security at a remaining dry-cask installation;
Preparing land for redevelopment; and
Addressing community economic-transition needs.
A claim that a project is “fully funded” should identify which obligations are included, the valuation date, assumed schedule, investment returns, escalation rates, and responsible party if costs exceed available funds.
Partial Site Release and Continuing Nuclear Use
Decommissioning does not always produce an entirely unrestricted site at one time. Portions of a property may be cleaned and released for other uses while another portion remains under NRC control.
If spent fuel remains in an onsite ISFSI, that area continues to require security, inspection, monitoring, and licensed management even after the reactor and most plant structures have been removed. Transmission facilities or other industrial infrastructure also may remain in use.
Site redevelopment therefore depends on:
The decommissioning schedule;
Residual contamination and cleanup standards;
The location of spent-fuel storage;
Access and security requirements;
Ownership of transmission and utility infrastructure;
Environmental conditions unrelated to radiological contamination;
Local land-use plans; and
Market demand for reuse.
Illinois and Host-Community Interests
Although the NRC oversees radiological decommissioning, Illinois agencies and local governments retain interests involving environmental protection, emergency planning, taxes, infrastructure, land use, workforce transition, and redevelopment.
Host communities should receive timely information concerning:
The selected decommissioning approach and schedule;
The status and assumptions of decommissioning funds;
Expected employment reductions;
Changes in property value and tax revenue;
Spent-fuel storage and security;
Emergency-response responsibilities after shutdown;
Environmental permits and remediation;
Prospects for partial site release;
Ownership and maintenance of roads and utilities; and
Potential industrial, energy, recreational, conservation, or other reuse.
A plan focused only on removing radioactive components may not address the full fiscal and economic consequences experienced by a host community.
New Reactors and Lifecycle Planning
A proposed new reactor should address decommissioning and spent-fuel management before construction begins. Smaller reactors and microreactors may generate less total spent fuel per unit, but their waste characteristics depend on the technology, fuel composition, operating cycle, and number of deployed units.
Some advanced-reactor developers propose alternative fuels, extended fuel cycles, recycling, or other fuel-management strategies. These proposals should be evaluated under existing federal law and the specific licensing record. A reactor’s fuel should not be described as recyclable, disposable, or waste-free merely because a future fuel-cycle option has been proposed.
A complete project plan should establish:
Responsibility for spent fuel and radioactive waste;
Decommissioning funding requirements;
Ownership obligations if the project changes hands;
Financial assurance if the operator becomes insolvent;
Post-closure security and emergency planning;
Expected pathways for site release or reuse; and
Protections for the host community throughout the facility’s lifecycle.
Issues to Monitor
Illinois stakeholders should monitor:
Federal progress toward consolidated interim storage and permanent disposal;
NRC renewal or amendment of dry-storage licenses;
Conditions at Illinois operating and retired reactor sites;
Decommissioning schedules and trust-fund adequacy;
Federal reimbursement or litigation concerning onsite storage costs;
Transportation planning and responder preparedness;
Availability of authorized low-level-waste disposal capacity;
State rules applicable to new SMRs or microreactors;
Opportunities for partial site release and redevelopment; and
Whether proposed new projects internalize their full lifecycle costs.
The continuing presence of spent fuel does not mean that an entire former reactor property must remain unusable. It does mean that decommissioning, redevelopment, and long-term fuel management should be treated as related but distinct responsibilities.
Sources & Further Reading:
U.S. Nuclear Regulatory Commission — Independent Spent-Fuel Storage Installations
U.S. Nuclear Regulatory Commission — Transportation of Spent Nuclear Fuel
U.S. Nuclear Regulatory Commission — Decommissioning of Nuclear Power Plants
U.S. Nuclear Regulatory Commission — Locations of Power-Reactor Decommissioning Sites
U.S. Department of Energy — Spent Nuclear Fuel and High-Level Radioactive Waste
U.S. Department of Transportation — Transporting Radioactive Materials
Nuclear facilities can provide substantial employment, taxable value, contracting opportunities, and economic activity for their host regions. Those benefits are concentrated geographically, however, as are the fiscal, infrastructure, emergency-response, and economic-transition risks associated with plant expansion, closure, or decommissioning.
A complete policy analysis should evaluate the facility throughout its lifecycle—from site selection and construction through operation, decommissioning, and reuse.
Construction and Local Development
A new reactor or major expansion can involve significant construction employment and demand for engineering, skilled trades, manufacturing, transportation, lodging, food service, and other local businesses.
The size and duration of those benefits depend on:
The reactor technology and number of generating units;
The project’s construction schedule;
The extent to which components are manufactured in Illinois;
Contractor and subcontractor selection;
Availability of qualified local workers;
Prevailing-wage, apprenticeship, and project-labor requirements;
Housing and transportation capacity;
Local procurement commitments; and
Whether the project reaches completion.
Construction jobs are generally temporary. Economic-impact estimates should distinguish temporary construction employment from permanent operating positions and should identify whether job figures represent direct workers, indirect supply-chain activity, or induced spending.
A project also can create public costs before it produces revenue. Host communities may need to expand roads, water and sewer service, fire and emergency-medical capacity, law enforcement, inspections, housing, and other infrastructure. Development agreements should identify which costs are paid by the developer and which remain with local taxpayers.
Long-Term Operations and Workforce
Operating a nuclear facility requires a specialized workforce that can include:
Licensed reactor operators;
Engineers and technical specialists;
Radiation-protection personnel;
Cybersecurity and physical-security staff;
Electricians, pipefitters, mechanics, and other skilled trades;
Chemists and environmental-monitoring personnel;
Emergency-preparedness professionals;
Maintenance and outage workers;
Administrative and regulatory-compliance staff; and
Contract workers supporting refueling, inspection, and major projects.
Many positions require specialized education, licensing, security screening, continuing training, or industry experience. A credible workforce strategy should begin well before a new reactor enters service.
Illinois’ planning may involve community colleges, universities, labor organizations, apprenticeship programs, workforce boards, existing nuclear employers, manufacturers, and state agencies. Training programs should identify whether they are preparing workers for construction, long-term operation, component manufacturing, emergency response, or decommissioning because those career paths require different skills.
The workforce benefits of new nuclear development also depend on whether projects create durable Illinois-based supply chains or rely primarily on out-of-state vendors for specialized components and professional services.
Existing Sites, Uprates and New Development
An expansion at an existing nuclear site may benefit from an experienced workforce, transmission access, established emergency plans, industrial land, cooling infrastructure, and community familiarity with nuclear operations.
Those advantages do not eliminate the need for project-specific review. An uprate, additional reactor, SMR, or microreactor may require:
New federal licensing or license amendments;
Transmission upgrades;
Additional cooling or water capacity;
Expanded emergency-response resources;
Construction staging and road improvements;
New property-tax or development agreements; and
Workforce recruitment beyond the existing plant staff.
An existing host community’s support for its current plant also should not be treated as automatic approval of every possible expansion or reactor technology.
Property Taxes and Local Revenue
Illinois property taxes are imposed and collected locally. A nuclear facility’s taxable value can affect counties, municipalities, school districts, fire protection districts, townships, community colleges, libraries, and other taxing bodies serving the property.
The plant’s presence can produce substantial local revenue, but the final distribution depends on:
The property’s assessed and equalized value;
The boundaries and levies of overlapping taxing districts;
Applicable tax rates and statutory limitations;
Assessment appeals or litigation;
Any negotiated valuation agreement;
Abatements or economic-development incentives;
Changes in plant investment or operating status; and
The treatment of new construction and retired property.
A plant owner and local taxing bodies may enter agreements intended to provide greater predictability than recurring assessment litigation. Such an agreement can improve budget planning, but its effects should be evaluated separately for each taxing district and over the agreement’s entire term.
References to a facility’s total property-tax payment do not show how much revenue a particular school district, county, fire protection district, or municipality receives.
School Funding Considerations
A change in a nuclear facility’s equalized assessed value can affect both local school property-tax capacity and calculations used in Illinois’ Evidence-Based Funding system.
A higher local tax base may improve a district’s ability to raise revenue, while a major assessment reduction or plant closure can produce a concentrated local loss. State school-funding calculations may respond to changes in local capacity, but adjustments may not occur at the same time or fully replace locally lost revenue.
School districts should therefore evaluate:
The share of their tax base represented by the facility;
The term and assumptions of any valuation agreement;
The timing of reassessments or retirement-related reductions;
Effects on tax rates and other taxpayers;
Interaction with Evidence-Based Funding calculations;
Enrollment or service changes associated with workforce growth or decline; and
Reserve and transition planning.
Additional background is available through Illinois Capitol Group’s Education & School Funding and Property Tax Policy pages.
Host-Community Agreements and Public Benefits
A host-community or development agreement may address benefits and responsibilities beyond ordinary property taxation. Potential subjects include:
Road, bridge, water, sewer, and broadband improvements;
Police, fire, EMS, and emergency-management costs;
Local hiring and apprenticeship commitments;
Workforce-training partnerships;
Supplier-diversity and local-procurement goals;
Housing and transportation effects;
Environmental monitoring;
Community-benefit funds;
Payments in lieu of taxes or agreed property valuations;
Decommissioning and site-restoration commitments;
Public reporting and community liaison processes; and
Remedies if construction is delayed or cancelled.
Any agreement should clearly identify enforceable obligations, funding sources, performance measures, duration, amendment procedures, and consequences for noncompliance.
Projected public benefits also should be compared with requested tax abatements, infrastructure subsidies, grants, ratepayer support, or other public assistance. Gross investment is not the same as net public benefit.
Closure and Fiscal Concentration Risk
A community that benefits significantly from a nuclear facility also may become dependent on one employer or taxpayer. Closure can affect:
Permanent and contract employment;
Local household income and consumer spending;
School, county, municipal, and special-district revenue;
Housing demand and property values;
Suppliers and service businesses;
Charitable and civic support;
Emergency-response arrangements; and
Community identity and long-term land use.
Decommissioning creates employment and contracting activity, but the number and type of jobs change over time. Decommissioning work should not automatically be treated as a one-for-one replacement for operating employment or tax revenue.
Spent-fuel storage may also continue after most plant employment and assessed value have declined. Host communities can therefore retain security, emergency-planning, land-use, and reputational responsibilities without receiving the same economic benefits associated with an operating reactor.
Planning Before Closure
Economic-transition planning should begin before a closure announcement becomes imminent. Useful preparation can include:
Measuring the facility’s share of employment, income, and local tax base;
Reviewing valuation agreements and likely post-closure assessments;
Identifying workforce credentials transferable to other industries;
Planning retraining and job-placement assistance;
Evaluating infrastructure and site-reuse opportunities;
Coordinating among affected taxing districts;
Establishing a community-transition or redevelopment entity;
Seeking state and federal technical assistance;
Preserving records needed for environmental and land-use decisions; and
Developing realistic timelines for decommissioning, partial site release, and redevelopment.
Existing transmission connections and industrial infrastructure may make a retired plant site attractive for energy storage, renewable generation, advanced manufacturing, data centers, new nuclear facilities, or other large-load projects. Reuse is not automatic; ownership, contamination, spent-fuel storage, interconnection rights, water access, market demand, and local plans all affect feasibility.
Evaluating Economic-Impact Claims
Economic-impact studies can inform public decisions, but their results depend heavily on assumptions. Policymakers should ask:
Who commissioned the analysis?
Are job figures temporary, permanent, direct, indirect, or induced?
Does “regional” mean the host county, Illinois, or a multistate area?
Are wages, tax payments, and procurement estimates independently verifiable?
Does the analysis subtract public incentives and infrastructure costs?
Are displaced economic activities or alternative projects considered?
Are construction delays or cancellation risks modeled?
Does the study account for eventual closure and decommissioning?
Are benefits reported annually or accumulated over several decades?
Which taxing districts receive the projected revenue?
A project can provide meaningful economic value even when its promotional estimates require adjustment. Transparent assumptions allow communities to distinguish credible benefits from figures that cannot be replicated.
Issues for Illinois Host Communities
Communities evaluating an operating plant, uprate, or proposed reactor should consider:
Whether the project matches local economic-development and land-use plans;
The number, duration, and qualifications of expected jobs;
Local workforce and supplier opportunities;
Public infrastructure and emergency-service costs;
Property-tax treatment and effects on overlapping districts;
Any requested abatements, grants, or other incentives;
Housing, traffic, water, and environmental effects;
Enforceable community-benefit commitments;
Ownership and responsibility if the project changes hands;
Decommissioning and spent-fuel obligations;
Revenue and workforce transition after closure; and
Potential alternative uses of the site and infrastructure.
The central question is not whether nuclear facilities can produce local economic benefits—they can. The policy question is whether those benefits are durable, equitably allocated, supported by enforceable commitments, and accompanied by plans for the costs and transitions that occur throughout the facility’s lifecycle.
Sources & Further Reading:
Executive Order 2026-01 — Accelerating New Safe Nuclear Generation in Illinois
Illinois Department of Commerce and Economic Opportunity — Workforce Development
Illinois Department of Employment Security — Labor Market Information
Illinois Works — Pre-Apprenticeship and Construction Workforce Programs
Illinois Department of Revenue — Illinois Property Tax System
U.S. Department of Energy — Nuclear Energy Workforce Development
U.S. Nuclear Regulatory Commission — Decommissioning of Nuclear Power Plants
U.S. Nuclear Regulatory Commission — Illinois Nuclear Facilities
U.S. Economic Development Administration — Economic Adjustment Assistance
Illinois nuclear policy has developed through recurring debates over plant closures, state support, electricity-market revenues, construction restrictions, consumer costs, and the effects of nuclear facilities on host communities. The materials below are retained for historical context. They should not be treated as descriptions of current law, current utility charges, or the present financial condition of any facility.
Existing-Plant Support: FEJA, CEJA & Closure Debates
The Future Energy Jobs Act, Public Act 99-0906, enacted in 2016, established Illinois’ Zero Emission Standard and authorized the purchase of zero-emission credits associated with the Clinton and Quad Cities nuclear stations. The program followed announcements that the facilities could close because of unfavorable market conditions.
During 2019 and 2020, Illinois again faced possible nuclear-plant closures, including announced plans affecting Byron and Dresden and concerns involving other facilities. News articles, market analyses, and legislative proposals from that period help explain the policy environment preceding the Climate and Equitable Jobs Act, but their projections should not be presented as current facility status.
The Climate and Equitable Jobs Act, Public Act 102-0662, enacted in 2021, created a carbon-mitigation-credit program supporting designated generation from Braidwood, Byron, and Dresden. Those developments now belong in the historical record leading to Illinois’ current mix of wholesale-market revenue, state programs, federal incentives, and private energy agreements.
Older articles concerning threatened closures, proposed support programs, and the negotiations preceding these laws may remain in this archive when clearly labeled with their publication dates.
2018–2019 Zero-Emission-Credit Litigation
Illinois’ zero-emission-credit program was challenged in federal court by competing electricity suppliers and generators. In Electric Power Supply Association v. Star and Village of Old Mill Creek v. Star, the U.S. Court of Appeals for the Seventh Circuit upheld the Illinois program against federal-preemption and constitutional challenges. The U.S. Supreme Court declined to review the decision in 2019.
The litigation remains useful for understanding the boundary between state authority over environmental attributes and federal authority over interstate wholesale-electricity markets. It should nevertheless be read as historical legal context rather than a comprehensive statement about every later Illinois support mechanism or subsequent federal market rule.
Carbon-Free Energy Resource Adjustment Dispute
In August 2023, several customer organizations filed a complaint at the Illinois Commerce Commission challenging aspects of ComEd’s administration of the Carbon-Free Energy Resource Adjustment. The parties’ filings included competing claims concerning calculations, customer credits, reconciliation, and interest.
Because allegations made in a complaint are not equivalent to an agency finding, archived discussion of the proceeding should distinguish the complainants’ positions, ComEd’s responses, and the Commission’s final decision. The Commission entered its final order on June 20, 2024.
Illinois Commerce Commission Docket 23-0610 — Complete docket sheet
Illinois Power Agency — Carbon Mitigation Credit Procurement Plan
Older CFRA articles may remain here for historical comparison, but any quoted charge, credit, percentage, or customer-bill effect should retain its original date. The adjustment changes with market revenues, governing calculations, and reconciliation periods; a historical amount should not be presented as a current rate.
Evolution of Illinois’ Nuclear-Construction Policy
Illinois’ former nuclear-construction restriction generated several rounds of legislative debate:
In 2023, the General Assembly initially approved broader repeal legislation, which Governor JB Pritzker vetoed.
A subsequent compromise became Public Act 103-0569, permitting consideration of nuclear reactors with a maximum nameplate capacity of 300 megawatts beginning January 1, 2026.
Public Act 104-0458, effective June 1, 2026, removed the remaining state restriction applicable to larger reactors.
Articles covering the 2023 veto, the later compromise, and the national cancellation of the NuScale Carbon Free Power Project may be preserved here as historical context. The NuScale project was not an Illinois reactor project; it is relevant principally as an example of the cost, subscription, and execution risks that can affect emerging nuclear technologies.
Current explanations of Illinois law and possible new projects should remain in the New Nuclear Development, SMRs & Microreactors section rather than being duplicated in this archive.
Historical Plant Valuation & Local Property-Tax Agreements
Illinois nuclear stations have long affected the tax bases of their host counties, municipalities, school districts, fire protection districts, and other local taxing bodies. Assessed-value disputes and negotiated agreements have therefore played a significant role in local budgeting and plant-owner relations.
The following older materials may remain as site-specific historical records:
Braidwood property-tax agreements involving Will County and the Reed-Custer school community;
Byron assessment changes and local-revenue effects;
Clinton agreements involving DeWitt County and local taxing districts;
Dresden agreements involving Grundy County taxing bodies;
LaSalle County nuclear-station valuation settlements; and
Quad Cities agreements involving Rock Island County and affected local governments, including the 2018 Quad Cities Generating Station Settlement Agreement.
These agreements should retain their dates and should not be used to infer a plant’s current assessed value, tax obligation, or the terms of a later agreement. Current explanations of host-community revenue and assessment policy belong in Host Communities, Workforce, Property Taxes & Economic Development and on the Illinois Property Tax Policy page.
Selected Historical Materials to Preserve
The archive may retain dated links or documents addressing:
Announced or threatened reactor closures and the negotiations preceding FEJA or CEJA;
Earlier Illinois nuclear-support proposals;
Implementation and litigation involving zero-emission credits;
Historical CFRA charges, credits, complaints, and reconciliations;
The 2023 nuclear-moratorium veto and subsequent legislative compromise;
Prior federal wholesale-market rules affecting state-supported nuclear generation;
Plant-specific property-tax settlements and assessment disputes;
Historical workforce and host-community impact analyses; and
Earlier reporting about emerging reactor technologies, when clearly identified as reflecting information available at the time.
Using the Archive
Archived materials document how Illinois arrived at its present nuclear-policy framework. Laws, market rules, utility tariffs, regulatory orders, facility plans, and technology projections may have changed since an item was published. Readers evaluating a current proposal should consult the page’s current-policy sections and the Illinois Nuclear Energy Policy Resources directory before relying on an archived source.
Apply Illinois Nuclear Policy to Your Organization’s Priorities
Illinois nuclear policy intersects with energy reliability, utility regulation, economic development, property taxation, workforce planning, environmental review, emergency preparedness, and host-community interests. Illinois Capitol Group helps organizations evaluate legislative and regulatory proposals, understand potential costs and opportunities, develop policy positions, and engage effectively with state decision-makers.