North Anna Nuclear Generating Station

North Anna Nuclear Generating Station
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Name	North Anna Nuclear Generating Station
Country	United States
Location	Louisa County, Virginia
Operator	Dominion Energy
Status	Operational
Commissioned	Unit 1: 1978; Unit 2: 1980
Reactor type	Pressurized water reactor (PWR)
Reactors	2 × 910 MW_e
Cooling	Lake Anna
Website	Dominion Energy

North Anna Nuclear Generating Station North Anna Nuclear Generating Station is a two‑unit nuclear power plant located near Mineral in Louisa County, Virginia, on the shores of Lake Anna. The facility supplies baseload electricity to the Mid‑Atlantic via the PJM Interconnection and is operated by Dominion Energy, serving customers across Virginia and the greater Washington, D.C. area. The plant has been the focus of regional energy policy discussions, interstate emergency planning, and seismic assessments following a 2011 earthquake.

History

Construction of the plant began in the early 1970s during a period of rapid expansion in U.S. nuclear capacity alongside projects such as Three Mile Island Nuclear Generating Station, Seabrook Station, and Indian Point Energy Center. Licensing and construction involved the Nuclear Regulatory Commission, the Virginia State Corporation Commission, and contractors including Bechtel Corporation and Westinghouse Electric Company. Unit 1 commenced commercial operation in 1978 and Unit 2 in 1980, joining other contemporaneous plants like Davis–Besse Nuclear Power Station and San Onofre Nuclear Generating Station. Over its operational life the site has interacted with federal agencies including the Federal Emergency Management Agency and regional utilities such as PJM Interconnection and Dominion Energy Virginia.

Reactor design and specifications

Both units at the site are pressurized water reactor (PWR) designs supplied by Westinghouse Electric Company. Each reactor originally licensed for roughly 800–900 MWe has undergone power uprates consistent with NRC approvals similar to uprates at Oconee Nuclear Station and Vogtle Electric Generating Plant. The plant uses Lake Anna as a cooling reservoir, comparable to cooling arrangements at Catawba Nuclear Station and Byron Nuclear Generating Station. Key systems follow conventional PWR architecture: reactor vessel, steam generators, pressurizer, primary coolant pumps, and emergency core cooling systems derived from industry standards used at Calvert Cliffs Nuclear Power Plant and Point Beach Nuclear Plant.

Operations and performance

North Anna supplies electricity into the PJM Interconnection regional grid and integrates with transmission managed by entities such as American Electric Power and Dominion Resources. Performance metrics have been benchmarked against plants like Palo Verde Nuclear Generating Station and Beaver Valley Nuclear Power Station with capacity factors influenced by scheduled refueling outages, maintenance coordinated with vendors like Areva and General Electric, and regulatory inspections by the Nuclear Regulatory Commission. The station has employed workforce development programs similar to those at Oak Ridge National Laboratory and partnered with regional institutions like the University of Virginia and Virginia Tech for training and research.

Safety, incidents, and seismic considerations

Safety systems at the site conform to NRC requirements and industry practices refined after incidents at Three Mile Island accident and Fukushima Daiichi nuclear disaster. In August 2011 an earthquake centered near Louisa County triggered shutdowns at North Anna; the event prompted investigations by the U.S. Geological Survey, follow‑up studies involving the Nuclear Regulatory Commission, and peer review by seismological experts associated with institutions such as the United States Geological Survey and Virginia Tech]. Subsequent seismic hazard reanalyses compared the site’s risk profile to assessments performed for San Onofre Nuclear Generating Station and Diablo Canyon Power Plant. The plant’s emergency core cooling, containment integrity, and seismic monitoring systems have been subjects of regulatory orders and industry benchmarking involving organizations like the Institute of Nuclear Power Operations and Electric Power Research Institute.

Environmental impact and emergency planning

Environmental review and permits considered impacts on Lake Anna fisheries and habitats, paralleling concerns addressed at Chesapeake Bay restoration and riverine projects by the U.S. Fish and Wildlife Service. Thermal discharge, aquatic ecology, and radiological monitoring regimes were developed in consultation with the Virginia Department of Environmental Quality and the Environmental Protection Agency. Emergency planning zones coordinate local, state, and federal responders including FEMA, the Virginia Department of Emergency Management, and county authorities such as Louisa County, Virginia and neighboring Spottsylvania County, Virginia. Public communication and evacuation planning have referenced federal guidance used for other facilities like Millstone Nuclear Power Station and Pilgrim Nuclear Power Station.

Ownership and economics

The site is owned and operated by Dominion Energy (formerly Dominion Resources), which has overseen capital investments, license renewals, and economic assessments among assets including Brunswick Nuclear Generating Station and Surry Nuclear Power Plant. Economic factors include wholesale market participation in PJM Interconnection, fuel procurement, and comparisons to alternative generation sources such as Calpine Corporation gas plants and regional renewable deployments backed by policy initiatives from the Virginia General Assembly and federal incentives. Discussions about license renewal, relicensing with the Nuclear Regulatory Commission, and potential decommissioning costs relate to financial planning models used by utilities like Exelon and Duke Energy.

Category:Nuclear power plants in Virginia