Liquid sodium cooling renders the reactor more cost-effective compared to water cooling.
Gates co-founded the company with a focus on advancing nuclear energy technology.
TerraPower is in a race against Russia and China in the nuclear energy sector.
The company aims to start construction in Kemmerer, Wyoming, in June.
TerraPower received substantial funding from both private investors and the US government.
The Natrium reactor's unique liquid sodium cooling system distinguishes it from traditional reactors.
TerraPower is exploring international partnerships for deploying its Natrium reactors.