• Powering America’s Future

    Mitsubishi's reliable and proven manufacturing technologies provide utility customers with the highest quality replacement components.

  • Maintaining and Improving

    MNES is happy to offer several nuclear service technologies and methods unique to our company to US companies for the first time. These services help ensure the safety and longevity of today’s and tomorrow’s American nuclear fleet.

  • Valuing the Best

    Our company’s foundation is based on the excellence of our employees. With offices across the US and a desire to foster growth in our employees, MNES offers employees an opportunity to work in a diverse company with some of the industry’s most experienced professionals and its talented rising stars.

  • Clean Energy

    Nuclear energy is a safe, clean method to meet America’s current and future base load energy needs. With nearly 20% of the energy produced in the US today being generated by nuclear power, the continued operation and expansion of these plants contribute to America’s energy independence.

Plants & Projects

Plants & Projects

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MNES offers the US-APWR nuclear power reactor and a variety of nuclear services. Learn more about our products and our current projects.

Technical Information

Technical Information

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Information about our reactor and services are available from industry sources and this website. Please explore these resources to learn more about our technologies or contact us for more specific information.

Career Opportunities

Career Opportunities

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Mitsubishi Nuclear Energy Systems, Inc. (MNES) is an equal opportunity employer.  We provide equal employment opportunities to all employees and applicants for employment without regard to race, color, religion, gender expression, sexual orientation, national origin, age, disability, genetic information, marital status, or status as a covered veteran in accordance with applicable federal, state and local laws.  To learn more, click here

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Benefits of APWR Technology

Mitsubishi Nuclear Energy Systems

Mitsubishi Nuclear Energy Systems, or MNES, provides a range of state-of-the-art replacement components, services, and technologies to U.S. utilities operating pressurized water reactor (PWR) nuclear power plants. These include replacement reactor vessel closure heads, steam generators, and robotic technologies.

The company also offers U.S. utilities the next generation of clean nuclear energy, the US-APWR nuclear power plant. The US-APWR design, specifically engineered for the United States, achieves superior safety, reliability, economy, and compatibility with the environment. Our design grew out of the expertise gained by Mitsubishi's construction of 24 PWRs in Japan.

MNES was established in 2006 by Mitsubishi Heavy Industries (MHI), as the supplier for Mitsubishi nuclear technologies in the United States. From its headquarters in Charlotte, North Carolina, MNES is leading the way for safer and more reliable nuclear energy. MNES seeks to be an “evolutionary” provider of nuclear equipment and services by building on existing technologies rather than to attempt revolutionary advancements.



Our Affiliates

American Nuclear Society
DOE - Global Nuclear Energy Partnership
Nuclear Regulatory Commission
World Nuclear Association

Latest News

Concerning the dispute regarding San Onofre Nuclear Generating Stations (SONGS) | Download

MNES completed the first U.S. water jet peening (WJP) project to prevent stress corrosion cracking of reactor vessel nozzles (RVNs) and bottom mounted nozzles.  | Download

Mitsubishi Nuclear Energy Systems, Inc. (MNES) will conduct hands-on training and qualification of the Mitsubishi Water Jet Peening (WJP) process in a radiological controlled environment at a new facility in the Greater Pittsburgh, PA area. | Download