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November 12, 2021

Hamaoka 5, Japan

By Carmen

Hamaoka 5 is a 1,380MW nuclear reactor which is located within the premises of Hamaoka Nuclear Power Plant. It is located in Shizuoka, Japan. The nuclear reactor is currently generating power and is in active status. The construction on the reactor commenced in Jul, 2000. The first power from the reactor was achieved in Apr, 2004. Subsequent to trial runs the reactor finally entered into commercial operation in Jan, 2005.

PID Project Type Total Capacity (MW) Active Capacity (MW) Pipeline Capacity (MW) Project Status Project Location Project Main Contractor
398 Nuclear 1,380 1,380 Active Shizuoka, Japan Hitachi-GE Nuclear Energy; Toshiba Energy Systems and Solutions


Hamaoka 5 is a Generation III nuclear reactor developed by Hitachi-GE Nuclear Energy and Toshiba Energy Systems and Solutions, are the main contractors for the project.

The 1,380MW reactor is owned and operated by Chubu Electric Power.

Hamaoka 5 is a type of BWR reactor. It features 872 fuel assemblies in the core of reactor, the place where fission occurs and energy is released.

The material used for the construction of the vessel is Alloyed Steel (SQV2A,SFVQ1A).

Development Status

The reactor construction commenced in Jul, 2000 and subsequently entered into commercial operation in Jan, 2005.

Contractors Involved

Hitachi-GE Nuclear Energy was selected as the steam turbine supplier for the nuclear reactor. Hitachi-GE Nuclear Energy and Toshiba Energy Systems and Solutions were selected as the architect engineers for the reactor. The reactor system was supplied by Toshiba Energy Systems and Solutions.

About Hitachi-GE Nuclear Energy

Hitachi-GE Nuclear Energy Ltd (Hitachi-GE), a subsidiary of Hitachi Ltd is a nuclear energy company that offers power plant construction and maintenance services. The company designs, develops, manufactures, markets, installs and maintains nuclear power products. Its products include light-water reactor equipment, nuclear fuel cycle products, fast-breeder reactor, and others. Hitachi-GE provides plants construction, plants and facilities delivery, internal pump test, multi-purpose steam source test, nuclear power plant simulator, preventive maintenance, and other services. It uses various techniques to construct nuclear power plants including the use of large crawler cranes and the prefabrication of large modules. The company operates Rokkasho reprocessing plant and spent fuel interim storage facility. Hitachi-GE is headquartered in Hitachi, Japan.

About Toshiba Energy Systems and Solutions

Toshiba Energy Systems & Solutions Corp (Toshiba ESS), a subsidiary of Toshiba Corp is a manufacturer and provider of energy systems, solutions and services. The company offers products which include power generating turbines, generators and transformers, surge arresters, protection relays, distribution systems, insulated switch gears, instrumentation and control equipment, electrical systems, among others. It offers products in thermal power, nuclear energy, renewable energy, hydrogen energy, heavy ion radiotherapy, transmission and distribution areas. Toshiba ESS provides services such as maintenance, power technologies, technical advisory, and monitoring support services. The company has operational presence in Asia, Europe, North America, Middle East and Africa. Toshiba ESS is headquartered in Kanagawa, Tokyo, Japan.


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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