“The Nuclear Regulatory Commission granted a construction permit for the Bill Gates-backed small modular reactor startup TerraPower’s flagship project to convert an old coal plant in Kemmerer, Wyoming, to a next-generation nuclear station. The approval marked the first time a commercial-scale fourth-generation nuclear reactor — the TerraPower design uses liquid sodium metal as a coolant instead of water, as all other commercial reactors in the United States use — has received the green light from regulators this century.”

From Heatmap.