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November 23, 2021

Seabrook 1, US

By Carmen

Seabrook 1 is a 1,296MW nuclear reactor which is located within the premises of Seabrook Nuclear Power Station. It is located in New Hampshire, the US. The nuclear reactor is currently generating power and is in active status. The construction on the reactor commenced in Jul, 1976. The first power from the reactor was achieved in May, 1990. Subsequent to trial runs the reactor finally entered into commercial operation in Aug, 1990.

PID Project Type Total Capacity (MW) Active Capacity (MW) Pipeline Capacity (MW) Project Status Project Location Project Main Contractor
930 Nuclear 1,296 1,296 Active New Hampshire, the US United Engineers & Constructors; Westinghouse Electric


Seabrook 1 is a Generation II nuclear reactor developed by United Engineers & Constructors and Westinghouse Electric, are the main contractors for the project.

The 1,296MW reactor is operated by NextEra Energy Resources. Hudson Light & Power Department, Massachusetts Municipal Wholesale Electric, NextEra Energy Resources and Taunton Municipal Lighting Plant are currently owning the project.

The PWR reactor generates 10,906.92GWh/annum of electricity. It features 193 fuel assemblies in the core of reactor, the place where fission occurs and energy is released.

Development Status

The reactor construction commenced in Jul, 1976 and subsequently entered into commercial operation in Aug, 1990.

Contractors Involved

GE Power was selected as the steam turbine supplier for the nuclear reactor. The company provided 1 steam turbine for the project. United Engineers & Constructors was selected as an architect engineer for the reactor. The reactor system was supplied by Westinghouse Electric. The reactor vessel have been supplied by Combustion Engineering, Inc. and Westinghouse Electric. The material used for the construction of the vessel is Carbon Steel (cst). The civil works were carried out by Perini Power Contractors.

About Westinghouse Electric

Westinghouse Electric Co LLC (Westinghouse) a subsidiary of Toshiba Corporation, is a nuclear energy company. It offers nuclear plant products, technologies, nuclear fuel, plant design and related services to utilities across the world. The company carries out development, licensing, detailed engineering, project management, component manufacturing and offers startup support for new nuclear plants. It provides a comprehensive range of nuclear fuel and operating plant products and services; and decontamination and decommissioning, and waste management services. The company operates through regional offices in the Americas, Asia, Europe, the Middle East and Africa. Westinghouse is headquartered in Cranberry Township, Pennsylvania, the US.


All power projects included in this report are drawn from GlobalData’s Power Intelligence Center. The information regarding the project parameters is sourced through secondary information sources such as electric utilities, equipment manufacturers, developers, project proponent’s – news, deals and financial reporting, regulatory body, associations, government planning reports and publications. Wherever needed the information is further validated through primary from various stakeholders across the power value chain and professionals from leading players within the power sector.

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