Dresden Nuclear Power Station

Dresden Nuclear Power Station
ENERGY.GOV · Public domain · source
Name	Dresden Nuclear Power Station
Country	United States
Location	Morris, Grundy County, Illinois
Coordinates	41°18′N 88°21′W
Owner	Exelon Generation
Operator	Exelon Corporation
Status	Partially defueled / Unit 1 decommissioned
Construction began	1958
Commissioned	1960 (Unit 1), 1970s (Units 2–3)
Decommissioned	1978 (Unit 1 retired), ongoing (Units 2–3)
Reactor type	Boiling water reactor (Unit 1: early BWR prototype; Units 2–3: BWR/3)
Reactor supplier	General Electric
Cooling source	Illinois River
Units decommissioned	1 × 210 MW
Units operational	0 (units permanently shut down)

Dresden Nuclear Power Station is a nuclear power complex located near Morris in Grundy County, Illinois, United States. The plant played a pioneering role in commercial boiling water reactor deployment, experienced mid‑career regulatory scrutiny, and entered a decommissioning and waste management phase under utility and federal oversight. Its legacy ties to regional energy systems, federal agencies, and industrial suppliers involved in mid‑20th‑century nuclear expansion.

History

Construction at the Dresden site began amid postwar atomic energy developments and civilian power programs that included Atomic Energy Commission projects, Commonwealth Edison expansions, and General Electric reactor contracts. The first unit, an early Boiling water reactor demonstration supplied by General Electric, reached commercial operation in 1960, contemporaneous with other early plants such as Shippingport Atomic Power Station and projects supported by the Atomic Energy Act of 1954. During the 1960s and 1970s Dresden expanded with larger Units 2 and 3, reflecting industry trends driven by Electric Power Research Institute research, utility consolidation exemplified by Commonwealth Edison and later corporate reorganizations leading to Exelon Corporation. The site’s history intersects with national debates over nuclear licensing at the Nuclear Regulatory Commission, state energy planning in Illinois, and regional infrastructure like the Illinois River navigation and transmission corridors tied to the Midcontinent Independent System Operator footprint.

Reactor Units and Technical Specifications

Dresden Unit 1 was an early demonstration Boiling water reactor design by General Electric, with a rated output near 200–250 megawatts electric and systems reflecting prototype equipment now cataloged in federal reactor registries. Units 2 and 3 were larger BWR/3 designs with Mark I containment features, moisture separator reheaters, jet pumps, and reactor coolant systems consistent with contemporaneous GE designs used at plants such as Quad Cities Generating Station and Vermont Yankee Nuclear Power Plant. Reactor internals, turbine-generators, and electrical switchyards were supplied by vendors including Westinghouse Electric Company components in balance‑of‑plant roles, and onsite cooling used once‑through water intake from the Illinois River with associated environmental permits administered by United States Environmental Protection Agency and Illinois Environmental Protection Agency. Instrumentation and control upgrades during later life included retrofits influenced by Institute of Nuclear Power Operations recommendations and Nuclear Regulatory Commission licensing amendments.

Operations and Performance

Operational performance at Dresden reflected early commercial learning curves, with Unit 1 providing formative grid experience for utilities such as Commonwealth Edison while Units 2 and 3 supplied baseload power into the Midwest Independent Transmission System Operator era. Capacity factors varied across decades with scheduled outages for refueling, maintenance, and uprates evaluated under NRC oversight and coordinated with regional transmission entities like PJ M Interconnection and market signals in PJM Interconnection—noting interconnections and power sales agreements common to large Midwestern plants. Dresden’s workforce drew technical staff trained via programs at institutions like Argonne National Laboratory and University of Illinois, while supply chain relationships involved firms such as Bechtel Corporation for engineering and Rolls-Royce and Siemens for balance‑of‑plant equipment in various upgrades.

Safety Incidents and Regulatory Actions

Throughout its operational life Dresden was subject to NRC inspections, enforcement actions, and industry safety initiatives catalyzed by events such as the Three Mile Island accident and consequent regulatory reforms. Documented incidents included steam generator and feedwater system issues, valve and electrical equipment failures, and reportable events entered into NRC databases; these prompted corrective measures referencing standards from American Society of Mechanical Engineers and guidance from Institute of Nuclear Power Operations. Regulatory actions involved license amendment proceedings, environmental reviews under the National Environmental Policy Act coordinated with United States Fish and Wildlife Service for riverine impacts, and state‑level oversight by the Illinois Commerce Commission. Worker safety and radiological controls adhered to Occupational Safety and Health Administration protocols and Nuclear Regulatory Commission radiation protection requirements.

Decommissioning and Waste Management

Unit 1 was retired in the late 1970s and underwent decommissioning activities coordinated with federal programs and license termination processes overseen by the Nuclear Regulatory Commission. Spent fuel from all units has been managed onsite in licensed independent spent fuel storage installations pending federal disposition policies established by the Department of Energy and shaped by litigation and legislation including the Nuclear Waste Policy Act of 1982. Decommissioning and waste management involve contractors and stakeholders such as EnergySolutions, specialized engineering firms, and state regulators; activities include radiological surveys, decontamination, dismantlement planning, and long‑term surveillance consistent with Nuclear Decommissioning Authority‑style frameworks adapted for U.S. practice and recommendations from International Atomic Energy Agency. The site remains part of regional emergency planning coordinated with FEMA and local authorities in Grundy County.

Category:Nuclear power stations in Illinois