Seabrook Station Nuclear Power Plant

Seabrook Station Nuclear Power Plant
Jim Richmond · CC BY-SA 2.0 · source
Name	Seabrook Station
Country	United States
Location	Seabrook, New Hampshire
Coordinates	42, 53, 56, N...
Owner	NextEra Energy Resources
Operator	NextEra Energy Resources
Construction began	July 1976
Commissioned	August 19, 1990
Reactor type	Pressurized water reactor
Reactor supplier	Westinghouse Electric Company
Ps electrical capacity	1,244 MW
Ps annual generation	9,000 GWh

Seabrook Station Nuclear Power Plant is a single-unit pressurized water reactor nuclear power plant located in Seabrook, New Hampshire, on the New England coast. Owned and operated by NextEra Energy Resources, it is the largest electrical generating unit in the New England Power Pool and a significant source of baseload electricity for the region. The plant's construction and licensing were marked by extensive public opposition and regulatory scrutiny, becoming a focal point for the Anti-nuclear movement in the United States.

History

The project was initiated in the early 1970s by a consortium of utilities led by the Public Service Company of New Hampshire. Construction began in July 1976 following approval from the Atomic Energy Commission, the predecessor to the Nuclear Regulatory Commission (NRC). The project faced massive protests organized by groups like the Clamshell Alliance, leading to numerous arrests and drawing national attention. Financial difficulties, exacerbated by the 1979 energy crisis and the Three Mile Island accident, caused major delays and the bankruptcy of the lead utility. The plant was ultimately completed after ownership was restructured, with NextEra Energy becoming the majority owner, and it received its low-power operating license from the NRC in 1990.

Design and technology

Seabrook Station houses a single four-loop pressurized water reactor manufactured by Westinghouse Electric Company, with a design similar to many units operated by Duke Energy and Southern Company. The reactor's core is housed within a large, reinforced concrete containment building designed to withstand extreme events. The turbine generator was supplied by General Electric, and the plant utilizes a once-through cooling system that draws water from the Atlantic Ocean. Key safety systems include redundant emergency core cooling systems and filtered containment venting systems upgraded in response to lessons from the Fukushima Daiichi nuclear disaster.

Operational history

The plant achieved initial criticality in 1989 and entered commercial operation in August 1990. It has since maintained a high capacity factor, consistently producing over 90% of its potential annual output. Major milestones include the successful completion of its first license renewal process with the NRC in 2019, extending operations until 2050. Operational events have been minor, such as brief shutdowns for equipment issues reported to the NRC under the Code of Federal Regulations. The facility undergoes regular refueling and maintenance outages every 18 to 24 months, often involving hundreds of supplemental workers from companies like Bechtel and Babcock & Wilcox.

Safety and environmental aspects

Safety oversight is conducted by the NRC, which maintains a resident inspector office on site. The plant's environmental monitoring program tracks impacts on local ecosystems, including the Great Marsh and fisheries in the Gulf of Maine. A primary environmental concern has been the effect of its thermal discharge and water intake on aquatic life, subject to regulation by the Environmental Protection Agency and the New Hampshire Department of Environmental Services. The plant maintains comprehensive emergency plans coordinated with the Federal Emergency Management Agency and state authorities in New Hampshire and Massachusetts. Spent nuclear fuel is stored on-site in dry cask storage systems designed by Holtec International.

Economic impact and future

Seabrook Station is a major economic driver for the Seacoast Region, employing approximately 800 full-time staff and contributing significantly to local tax bases in towns like Hampton Falls. It provides a stable source of carbon-free electricity in a region heavily reliant on natural gas imports, supporting grid reliability for ISO New England. Future plans focus on long-term operation under its renewed license, with ongoing investments in digital control system upgrades and component modernization. The eventual decommissioning will be managed under the NRC's regulations, with funds secured in a decommissioning trust.

Category:Nuclear power stations in New Hampshire Category:Buildings and structures in Rockingham County, New Hampshire Category:Pressurized water reactors