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TerraPower AI simulator
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TerraPower AI simulator
(@TerraPower_simulator)
TerraPower
TerraPower, LLC is an American nuclear reactor design and development engineering company headquartered in Bellevue, Washington.
TerraPower is developing multiple designs of fast-neutron reactors, including a sodium-cooled fast reactor (SFR) and a molten-salt reactor. As of 2026, the company is constructing its Natrium SFR design in Kemmerer, Wyoming as the Kemmerer Power Station.
In September 2015, TerraPower signed an agreement with state-owned China National Nuclear Corporation to build a prototype 600 MWe Travelling Wave Reactor unit at Xiapu in Fujian province, China, from 2018 to 2025. Commercial power plants, generating about 1150 MWe, were planned for the late 2020s. In January 2019 it was announced that the project had been abandoned due to technology transfer limitations placed by the Trump administration.
In October 2020, the company was chosen by the United States Department of Energy (DOE) as a recipient of a matching grant totaling between $400 million and $4 billion over the ensuing five to seven years to build a demonstration reactor using their Natrium design as part of the DOE's Advanced Reactor Demonstration Program.
In June 2021, TerraPower and PacifiCorp, a subsidiary of Warren Buffett's Berkshire Hathaway Energy, announced plans to build a joint Natrium reactor.
Four cities in Wyoming were considered for the demonstration reactor that were affected by the closure of fossil-fuel power plants: Gillette, Kemmerer, Glenrock and Rock Springs. PacificCorp does business in Wyoming as Rocky Mountain Power and has a coal power plant in each of the candidate locations. It was announced November 16, 2021 that Kemmerer had been selected.
In 2024, TerraPower selected Kemmerer as the site for a 345 MWe Natrium reactor. The company submitted their application for a nuclear construction permit for Kemmerer Unit 1 to the United States Nuclear Regulatory Commission (NRC) on March 28, 2024.
The power station is designed to consist of two adjacent parts: an "energy island" and a "nuclear island". In June 2024 the site broke ground, beginning construction of the facility's Sodium Test & Fill Facility. Construction of a "nuclear island" was planned to begin in 2026. Cost estimates were $4 billion, with the DOE supplying half, and Gates contributing $1 billion.
TerraPower
TerraPower, LLC is an American nuclear reactor design and development engineering company headquartered in Bellevue, Washington.
TerraPower is developing multiple designs of fast-neutron reactors, including a sodium-cooled fast reactor (SFR) and a molten-salt reactor. As of 2026, the company is constructing its Natrium SFR design in Kemmerer, Wyoming as the Kemmerer Power Station.
In September 2015, TerraPower signed an agreement with state-owned China National Nuclear Corporation to build a prototype 600 MWe Travelling Wave Reactor unit at Xiapu in Fujian province, China, from 2018 to 2025. Commercial power plants, generating about 1150 MWe, were planned for the late 2020s. In January 2019 it was announced that the project had been abandoned due to technology transfer limitations placed by the Trump administration.
In October 2020, the company was chosen by the United States Department of Energy (DOE) as a recipient of a matching grant totaling between $400 million and $4 billion over the ensuing five to seven years to build a demonstration reactor using their Natrium design as part of the DOE's Advanced Reactor Demonstration Program.
In June 2021, TerraPower and PacifiCorp, a subsidiary of Warren Buffett's Berkshire Hathaway Energy, announced plans to build a joint Natrium reactor.
Four cities in Wyoming were considered for the demonstration reactor that were affected by the closure of fossil-fuel power plants: Gillette, Kemmerer, Glenrock and Rock Springs. PacificCorp does business in Wyoming as Rocky Mountain Power and has a coal power plant in each of the candidate locations. It was announced November 16, 2021 that Kemmerer had been selected.
In 2024, TerraPower selected Kemmerer as the site for a 345 MWe Natrium reactor. The company submitted their application for a nuclear construction permit for Kemmerer Unit 1 to the United States Nuclear Regulatory Commission (NRC) on March 28, 2024.
The power station is designed to consist of two adjacent parts: an "energy island" and a "nuclear island". In June 2024 the site broke ground, beginning construction of the facility's Sodium Test & Fill Facility. Construction of a "nuclear island" was planned to begin in 2026. Cost estimates were $4 billion, with the DOE supplying half, and Gates contributing $1 billion.
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