TerraPower is constructing the Natrium plant, Kemmerer Unit 1, the first utility-scale advanced nuclear power plant in the US, featuring a sodium-cooled fast reactor with an integrated molten salt-based energy storage system for increased energy output as needed. Part of the US Department of Energy's Advanced Reactor Demonstration Program, the Natrium plant aims to serve as a blueprint for future plants globally, providing steady base output and quick ramp-up during peak demand, offering a unique and innovative addition to America's energy infrastructure.
https://www.power-technology.com/news/construction-starts-on-us-first-utility-scale-advanced-npp/