TerraPower

Bellevue, Washington, USA
Active
SFR

Company overview

Founded
2008
Total funding
$880M+
Technology
SFR — Sodium-cooled Fast Reactor

About

TerraPower develops advanced nuclear-energy and isotope technologies for carbon-free electricity, industrial decarbonization and medical applications. Its Natrium system combines a 345-MWe sodium-cooled fast reactor with molten-salt energy storage that can increase output to 500 MWe. On 4 March 2026, TerraPower announced that the U.S. Nuclear Regulatory Commission had voted to issue a construction permit for Kemmerer Unit 1 in Wyoming, its Natrium project and the first commercial-scale advanced nuclear plant to receive such a permit.

Key investors

Bill Gates, SK Inc., DOE ($2B grant), HD Hyundai

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