Sizewell B is a 1,250MW nuclear reactor which is located within the premises of Sizewell B Power Station. It is located in England, the UK. According to GlobalData, who tracks and profiles over 170,000 power plants worldwide, the nuclear reactor is currently generating power and is in active status. The construction on the reactor commenced in Jul, 1988. The first power from the reactor was achieved in Feb, 1995. Subsequent to trial runs the reactor finally entered into commercial operation in Sep, 1995. Buy the profile here.


Sizewell B is a Generation II nuclear reactor developed by GE Power, John Laing Group and Westinghouse Electric, are the main contractors for the project.

The 1,250MW reactor is operated by EDF Energy Nuclear Generation Group. Electricite de France and Centrica are currently owning the project having ownership stake of 80% and 20% respectively.

The PWR reactor generates 6,709.39GWh/annum of electricity. It features 193 fuel assemblies in the core of reactor, the place where fission occurs and energy is released. Safety contol rods that are used to control the fission rate in the reactor are 32 in number. The project cost is $3,743.28m.

Development status

The reactor construction commenced in Jul, 1988 and subsequently entered into commercial operation in Sep, 1995.

Contractors Involved

GE Power was selected as the steam turbine supplier for the nuclear reactor. The company provided 2 steam turbines for the project. The reactor system was supplied by Westinghouse Electric. The reactor vessel has been supplied by Framatome. The material used for the construction of the vessel is Alloyed Steel (SA 508/SA 533). The civil works were carried out by John Laing Group.

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About GE Power

GE Power (GEP), formerly GE Energy, a business division of the General Electric Company, is a provider of power generation and water processing products and related services. The company product portfolio includes aero derivative and heavy-duty gas turbine systems, generators, boilers, steam turbines, air quality control systems, gas engines, reactors and water treatment, waste water treatment, and process system solutions, among others. GEP offers products and technologies for generating electricity from various sources such as oil, gas, nuclear, coal, mining, diesel and water. The company also offers services for maintenance, service and upgrade of power plants; solutions for water treatment, wastewater treatment and process systems; services for distributed power generation; and support services for boiling water reactors. It caters its products and services to independent power producers and other industrial customers. GEP is headquartered in Schenectady, New York, the US

About John Laing Group

John Laing Group Plc (John Laing), invests, develops and manages infrastructure projects. It also offers asset management services to the primary and secondary investment portfolios. The company finances transport, social and environmental infrastructure projects under public private partnership (PPP) and private finance initiative (PFI) programmes, and renewable energy projects. John Laing invests in companies operating in diverse sectors such as healthcare, justice and emergency services, local authority development, roads, rails, waste and utilities and renewable energy sectors. The company operates in the UK, Australia, the Netherlands, Israel, Canada, the US and Colombia. John Laing is headquartered in London, England, the UK.

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. It operates through regional offices in the Americas, Asia, Europe, the Middle East and Africa. Westinghouse is headquartered in Cranberry Township, Pennsylvania, the US.


GlobalData, the leading provider of industry intelligence, provided the underlying research used to produce this article.

This information is drawn from GlobalData’s Power Intelligence Center, which provides detailed profiles of over 170,000 active, planned and under construction power plants worldwide from announcement through to operation across all technologies and countries worldwide.