Dresden Generating Station

Dresden Generating Station
Name	Dresden Generating Station
Country	United States
Location	Morris, Grundy County, Illinois
Status	Operational
Operator	Exelon Corporation
Construction commissioned	1966
Reactor type	Boiling Water Reactor (BWR)
Units operational	2 (units 2 and 3)
Electrical capacity MWe	1,835
Cooling source	Illinois River
Website	Exelon Nuclear

Dresden Generating Station is a nuclear power plant located near Morris in Grundy County, Illinois, on the Illinois River. The site, owned and operated by Exelon Corporation, houses boiling water reactors that have supplied baseload electricity to the Midcontinent Independent System Operator and PJM Interconnection grids since the 1960s and 1970s. The station has been central to regional energy policy debates involving the Illinois General Assembly, the Federal Energy Regulatory Commission, and environmental groups such as the Sierra Club.

Introduction

The Dresden complex sits near the intersection of transport corridors serving Chicago and St. Louis, adjacent to the Illinois River and in proximity to communities including Joliet and Naperville. As part of the United States nuclear fleet overseen by the Nuclear Regulatory Commission, Dresden has interfaced with national institutions including the Department of Energy and the Electric Power Research Institute. The plant's operation intersects with industrial entities such as Commonwealth Edison and corporate successors including Exelon and Constellation Energy, and with stakeholders including labor unions like the International Brotherhood of Electrical Workers.

History and Development

Dresden's origins trace to early private and public nuclear programs that included firms such as General Electric, Westinghouse, and Bechtel. Construction began during the mid-1960s amid a wave of utility nuclear expansion alongside plants such as Palisades, Oyster Creek, and Three Mile Island. Unit 1 entered service in the late 1960s; units 2 and 3 followed, paralleling developments at the Browns Ferry and Humboldt Bay sites. Over decades the station has been affected by policy shifts from the Atomic Energy Commission to the Nuclear Regulatory Commission and legislative actions in the Illinois General Assembly, and has appeared in discussions involving figures and entities such as the Energy Research and Development Administration and the Carter administration energy initiatives.

Reactor Design and Specifications

Dresden's primary operating units are boiling water reactors supplied by General Electric; the site historically included an early prototype pressurized water design that was retired. Units 2 and 3 are Mark I/II-era BWRs with reactor pressure vessels, recirculation pumps, steam separators, and turbine-generator sets connected to regional transmission operated by entities like the Northern Illinois Transmission System. Key components and vendors over time have included GE nuclear steam supply systems, Westinghouse instrumentation, and ABB/AEG turbine equipment. Design specifications align with NRC-licensed thermal power, electric output, control rod mechanisms, and emergency core cooling systems consistent with U.S. light water reactor standards.

Operations and Performance

Dresden has provided high-capacity-factor baseload generation contributing to the PJM and MISO markets, interlinking with utilities including Commonwealth Edison and Ameren. Plant performance metrics have been monitored by the Institute of Nuclear Power Operations and reported in industry analyses alongside peers such as Byron, Braidwood, and LaSalle. Maintenance, refueling outages, and uprate projects have been executed with contractors and vendors including Bechtel, Fluor, and Westinghouse, and coordinated with labor organizations and state regulators. Economic analyses by entities such as the Illinois Commerce Commission and independent system planners have assessed Dresden's role in wholesale price formation and resource adequacy.

Safety, Incidents, and Regulatory Oversight

Regulation and oversight have involved the Nuclear Regulatory Commission, the Illinois Emergency Management Agency, and regional fire and emergency services. Dresden has undergone NRC inspections, license amendments, and special inspections in the context of industry events such as the Three Mile Island accident and the Fukushima Daiichi accident, prompting reviews analogous to NRC order implementation and NRC Generic Issues. Incidents, operational scrams, and reportable events have been documented in NRC event notifications and addressed through corrective action programs, with participation from the Electric Power Research Institute and the Institute of Nuclear Power Operations. Legal and administrative proceedings have engaged entities such as the U.S. Court of Appeals and state public utility commissions.

Environmental Impact and Waste Management

The station's environmental footprint intersects with Illinois River ecosystems, the U.S. Environmental Protection Agency, and state environmental agencies. Cooling water withdrawals, thermal discharges, and aquatic habitat considerations have been evaluated alongside regulations such as the Clean Water Act and Endangered Species Act consultations. Spent nuclear fuel is stored onsite under NRC-approved dry cask systems and spent fuel pools, subject to Department of Energy and Nuclear Waste Policy Act contexts that involve national repositories and initiatives examined by Congress and the Blue Ribbon Commission on America's Nuclear Future. Environmental advocacy organizations, including the Natural Resources Defense Council and local watershed groups, have participated in public comment and proceedings.

Decommissioning Plans and Future Prospects

Long-range planning considers extended operation license renewals, economic factors influenced by state-level zero-emission credits and carbon policy debates in the Illinois General Assembly, and corporate strategies by Exelon and successor companies. Potential decommissioning pathways follow NRC regulations for SAFSTOR and DECON approaches and involve contractors experienced in site remediation, waste transportation subject to Department of Transportation rules, and community engagement reflected in local planning commissions. Future prospects for the site include continued operation under license renewal, site redevelopment for advanced reactor demonstration projects supported by Department of Energy programs, or repurposing consistent with state energy transition policies and regional economic development agencies.

Category:Nuclear power plants in Illinois Category:Exelon