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Mitsubishi Heavy Industries, Ltd. has a history of leadership in pressurized water reactor development in Japan. Our research and development efforts and real-world experience led to the U.S. Advanced Pressurized Water Reactor (US-APWR), the most powerful and efficient power plant in the world.

The US-APWR grew out of the "Third Phase Improvement and Standardization Program" for nuclear power plants, funded by Japan’s Ministry of International Trade and Industry (MITI). The new design takes into account recent utility requirements regarding safety, reliability, economy and compatibility with the environment. Improvements in the US-APWR over earlier designs includes a thermal efficiency of 39%, the highest in the industry; a 20% reduction in plant building volume; and greater economy by increasing power generation capacity to the 1,700 megawatt class.

  • World's leading nuclear power companies adopt principles of conduct
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    - Arlington, VA
    Sep 15, 2011

  • MNES Response to the NRC Task Force Report on the Fukushima Events
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    - Arlington, VA
    Sep 1, 2011

  • MHI to Establish Advanced Plant Safety Department To Boost Response to Safety Measures for PWR Nuclear Power Plants
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    - Tokyo, Japan
    July 14, 2011

  • MNES to Establish Engineering Center in North Carolina to Expand the Business in the US Market
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    - Arlington, VA
    May 31, 2011

  • MHI and Hitachi Begin Specific Discussion on Supportive Measures for Fukushima Daiichi Nuclear Power Station
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    - Tokyo , Japan
    Apr 27, 2011

  • MHI to Deliver Special Heavy-duty Forklifts with Radiation shielded Cabin to Contribute to Safer Handling of Contaminated Rubble Near Fukushima Daiichi Nuclear Power Station
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    - Tokyo , Japan
    Apr 27, 2011

  • MNES Statement on North Eastern Earthquake and Tsunami in Japan
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    - Arlington, VA
    Apr 1, 2011

  • Mitsubishi and Dominion Reach Agreement to Continue Engineering and Planning Work in Support of Future North Anna 3 Nuclear Plant
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    - Arlington, VA
    Dec 27, 2010

  • Dominion Virginia Power Selects Mitsubishi's US-APWR Reactor Design for Possible Expansion at North Anna Nuclear Plant
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    - Arlington, VA
    May 7, 2010

  • Contract Development Begins for Proposed Comanche Peak Expansion
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    - Dallas, TX
    July 6, 2009

  • MNES Names New CEO, Establishes Projects Management Division
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    - Washington, DC
    May 13, 2009

  • NRC Sets Review Schedule for Luminant Plant Expansion, Moves Forward on Design Review of Mitsubishi
    US-APWR
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    - Washington, DC
    March 18, 2009

  • MHI Completes Delivery of 2 Replacement Steam Generators to California's Largest Electric Utility
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    - Tokyo, February 24, 2009

  • Mitsubishi Nuclear Energy Systems Receives Trade Group Recognition as Plant Designer
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    - Washington, DC
    February 23, 2009

  • Luminant & Mitsubishi Heavy Industries, Ltd., Establish Nuclear Plant Development Joint Venture
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    - Tokyo/Dallas,
    February 2, 2009

is the U.S. subsidiary of Mitsubishi Heavy Industries, Ltd. one of the world’s leading manufacturers of nuclear and conventional electric power plants and replacement components (reactor vessel head and steam generator). Mitsubishi is a fully-integrated nuclear power plant and steam generator supplier, providing planning, design, manufacturing, construction and plant maintenance for its utility customers.