The US Nuclear Regulatory Commission (NRC) has awarded a construction permit to TerraPower’s Kemmerer Unit 1 nuclear power plant in Wyoming, United States (TerraPower press release, 04/03/2026). The company submitted its application for the development of the project two years ago and is now planning to start construction in the “coming weeks”, aiming for commissioning in 2030. The Kemmerer Unit 1 NPP is designed to have a 345 MW sodium-cooled fast reactor with a patented molten salt-based energy storage system with an output capacity of 500 MW of power when needed.
According to the statement, the project represents “the first commercial-scale, advanced nuclear power plant to ever receive this permit” since it has a Natrium reactor, a technology developed by TerraPower and GE Vernova Hitachi Nuclear Energy. The project is being developed through the US DOE’s Advanced Reactor Demonstration Program (ARDP), a public-private partnership.
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