ArcelorMittal invested $25 million in TerraPower through its XCarb Innovation Fund, contributing to the nuclear company's record $830 million equity raise. TerraPower's revolutionary Natrium technology combines sodium fast reactor capabilities alongside molten salt energy storage systems. The inaugural demonstration reactor near Kemmerer, Wyoming provides 345 MWe base capacity alongside 500 MWe peak output, showcasing advanced nuclear potential for industrial decarbonization.