Mitsubishi Heavy Industries (MHI) has completed the delivery of replacement steam generators to France. These components were ordered by
EDF in 2019 following an international bidding process. MHI collaborated with
Onet Technologies, its alliance partner in the French nuclear power market since 2002, on this order.
The manufacturing of these steam generators was finalized at MHI's Kobe facility in January 2024. The units received certification in late February, confirming compliance with French nuclear regulatory authority standards, before being transported to France.
Steam generators are essential for pressurized water reactors (PWRs), transferring thermal energy from the reactor's primary cooling system to the secondary cooling system. This process generates steam to power electricity generation turbines. Each steam generator measures approximately 21 meters in height and weighs about 330 tonnes. They are constructed from strong low-alloy steel and contain over 4,500 heat transfer tubes made of TT690, a nickel, chromium, and iron alloy designed for enhanced corrosion resistance.
Ongoing Supply and Operational Lifespan Extension
MHI has received orders from EDF for a total of nine replacement steam generators. The remaining six units are currently under production at MHI's Kobe facilities, with deliveries anticipated from 2028 onwards. Since 2005, MHI has supplied EDF with a cumulative total of 15 replacement steam generators, excluding the most recent delivery.
EDF operates 57 PWR plants in France. The replacement of steam generators aligns with the French government's policy to extend the operational life of nuclear power plants beyond 40 years. EDF has been systematically replacing steam generators in its PWR plants that began operations in the 1980s.
MHI has a track record of delivering over 30 replacement steam generators to international markets, including France, Belgium, and the USA. Globally, the company has received orders for more than 130 steam generators, encompassing both new installations and replacement projects in Japan.