TerraPower says Natrium startup will slip at least two years because of HALEU supply

TerraPower/Natrium (Kemmerer Unit 1)

TerraPower announced the Natrium demonstration plant would miss its 2028 in-service target by at least two years due to HALEU fuel supply constraints. Russia's invasion of Ukraine removed the only commercial source of high-assay low-enriched uranium, forcing delays while alternative fuel sources were developed.

• Natrium slipping at least two years from 2028 target due to HALEU fuel unavailability from Russia
• Non-nuclear construction still expected to start in 2023; full schedule update planned once fuel alternatives secured
• Over $830M in private funding raised; $1.6B from Congress to complete demonstration despite fuel constraints