US approves TerraPower's sodium-cooled reactor, testing whether next-gen nuclear can meet AI-era power demands - Silicon Canals

"The Natrium reactor, developed jointly by Bill Gates-backed TerraPower and GE Hitachi, is being built as part of the Department of Energy's Advanced Reactor Demonstration Program. It represents something genuinely new: a reactor designed from the ground up to complement renewable energy rather than compete with it."

"The Natrium design departs from that model in several important ways. It uses liquid sodium instead of high-pressure steam for cooling, which allows the system to operate at atmospheric pressure and avoids the engineering challenges associated with containing superheated water."

"The plant also incorporates a salt-based energy storage system reportedly capable of temporarily boosting output to 500 MW. That storage layer is the critical differentiator: it allows the facility to ramp power up and down in response to fluctuations in wind and solar generation, functioning less like a traditional always-on nuclear plant and more like a dispatchable complement to variable renewables."

The NRC granted TerraPower permission to build the Natrium reactor in Kemmerer, Wyoming, representing a significant milestone for advanced nuclear energy in the United States. Developed jointly by TerraPower and GE Hitachi with Department of Energy support, the Natrium reactor uses liquid sodium cooling instead of pressurized water, operating at atmospheric pressure. The 345 MW reactor includes a salt-based energy storage system that can temporarily boost output to 500 MW, enabling the plant to adjust power generation in response to renewable energy fluctuations. This design fundamentally differs from traditional nuclear plants by functioning as a flexible, dispatchable resource that complements variable renewables rather than competing with them, addressing a critical challenge in decarbonizing electrical grids.

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