Vermont Yankee

Vermont Yankee
Name	Vermont Yankee Nuclear Power Station
Country	United States
Location	Vernon, Vermont
Operator	Entergy Nuclear Operations, Inc.
Status	Decommissioned
Construction began	1966
Commission	1972
Decommission	2014 (shutdown), 2020 (defueling/SAFSTOR start)
Reactor type	Boiling water reactor
Reactor supplier	General Electric
Cooling source	Connecticut River
Units	1 × 620 MWe (net)
Thermal capacity	~1870 MWt

Vermont Yankee was a commercial nuclear power station located in Vernon, Vermont, on the Connecticut River. The plant began commercial operation in the early 1970s and was operated for decades by the Yankee Atomic Electric Company and later by Entergy Corporation. Its lifetime encompassed technological developments in nuclear engineering, high-profile legal and regulatory disputes involving the Vermont Public Service Board, Vermont Senate, and U.S. Nuclear Regulatory Commission, and controversies related to environmental policy, decommissioning, and spent fuel storage.

History

Vermont Yankee's origin traces to early cold war and postwar nuclear expansion when companies such as General Electric, Westinghouse Electric Company, and utilities like Vermont Yankee's original owners pursued commercial reactors; construction began in 1966 and it was connected to the New England power grid in 1972. Ownership and corporate control shifted through corporate mergers and acquisitions involving Northeast Utilities, Entergy Corporation, and regional utilities, intersecting with state-level politics in Montpelier, Vermont and federal oversight by the U.S. Nuclear Regulatory Commission. Licensing renewals and relicensing efforts brought litigation before courts including the United States Court of Appeals for the Second Circuit and attracted attention from federal legislators such as members of the United States Senate and representatives from Vermont's congressional delegation. Public debate intensified after incidents in the 2000s, prompting action by advocacy groups like the Sierra Club, Greenpeace, and local citizen organizations including the Vermont Public Interest Research Group. Proceedings before the Vermont Public Service Board and state statutes such as those enacted by the Vermont General Assembly played significant roles in the plant's operational status and eventual shutdown announcement in 2013 by Entergy.

Design and Specifications

The plant employed a single General Electric-designed boiling water reactor (BWR) as built under license from the U.S. Atomic Energy Commission and later regulated by the U.S. Nuclear Regulatory Commission. The reactor's thermal and electrical ratings were comparable to contemporaneous BWRs at sites like Pilgrim Nuclear Power Station and Dresden Nuclear Power Station. Key plant systems included a containment building, reactor coolant system, feedwater pumps, turbine-generator set, and cooling water intake from the Connecticut River, similar to designs at Oyster Creek Nuclear Generating Station. Safety systems reflected post-accident regulatory changes following events like the Three Mile Island accident and global policy responses influenced by the International Atomic Energy Agency. Fuel assemblies were supplied through contracts with suppliers such as General Electric and handled in accordance with regulations under the Nuclear Waste Policy Act. The site also integrated grid interconnections to regional transmission operators including ISO New England.

Operations and Incidents

Throughout its operational life, Vermont Yankee experienced routine refueling outages, maintenance periods, and periodic reports filed with the U.S. Nuclear Regulatory Commission. Notable operational events prompted investigations by the NRC and reporting in state forums including hearings at the Vermont State House. Incidents raised concerns among regional public health organizations like the Vermont Department of Health and environmental regulators including the Vermont Agency of Natural Resources. The plant's operations were scrutinized after contamination events and tritium leaks detected in monitoring wells, leading to involvement by national media outlets, environmental groups such as the Natural Resources Defense Council, and legal actions in state and federal courts including litigation referencing the National Environmental Policy Act and state environmental statutes. Emergency preparedness plans were coordinated with local municipalities such as Vernon, Vermont, county emergency services, and the Federal Emergency Management Agency.

Decommissioning and Waste Management

After Entergy announced closure, decommissioning planning engaged entities including Entergy Nuclear, engineering firms with experience at sites like San Onofre Nuclear Generating Station and federal agencies such as the Nuclear Regulatory Commission. The site entered a decommissioning process addressing spent nuclear fuel stored onsite in dry casks and spent fuel pools, governed by federal law including the Nuclear Waste Policy Act and state oversight by agencies like the Vermont Department of Environmental Conservation. Proposals for long-term storage prompted discussion involving the Blue Ribbon Commission on America's Nuclear Future and utilities such as Exelon Corporation and Dominion Energy as examples of industry stakeholders. Advocacy organizations including the Union of Concerned Scientists and local citizen groups monitored radiological surveys, soil sampling, and groundwater monitoring. Legal and financial arrangements involved trust funds, ratepayer implications scrutinized by public utility commissions such as the Public Utility Commission of Vermont, and contracts related to decontamination, dismantlement, and site restoration.

Economic and Regulatory Issues

Economic factors influencing Vermont Yankee included wholesale electricity markets administered by ISO New England, competing generation sources like natural gas-fired power plants and renewable energy projects, and the cost-benefit analyses typical of utility planning performed by firms like Black & Veatch. Regulatory disputes involved the Vermont Public Service Board, the Vermont Attorney General, and federal preemption doctrines litigated in the United States Court of Appeals for the Second Circuit and the United States Supreme Court in related precedents. Ratepayer impacts, decommissioning trust funding, and corporate decisions by Entergy Corporation were debated alongside policy proposals from the Vermont Legislature and advocacy groups including the Vermont Natural Resources Council. Economic modeling and regulatory filings referenced market signals in New England and federal tax, environmental, and energy statutes.

Environmental and Community Impact

Environmental assessments considered effects on the Connecticut River ecosystem, impacts on species protected under laws administered by the U.S. Fish and Wildlife Service and the Vermont Fish & Wildlife Department, and water use issues involving interstate compacts. Community impacts encompassed employment in Windham County, Vermont, tax revenues to local school districts and municipalities, and civic debates in media outlets such as the Brattleboro Reformer and statewide news coverage in Vermont Public Radio. Health monitoring and epidemiological inquiries involved institutions like the Centers for Disease Control and Prevention and academic researchers at University of Vermont. Local activism intersected with national movements exemplified by groups such as Friends of the Earth and policy organizations like the Energy Information Administration in analyses of decommissioning outcomes and regional energy transitions.

Category:Nuclear power plants in the United States Category:Energy infrastructure in Vermont Category:Decommissioned nuclear reactors