Antares Nuclear reaches zero-power criticality in DOE Reactor Pilot Program, one of four companies to succeed

Antares Nuclear/DOE Pilot Program Demonstration Reactor

Antares Nuclear achieved zero-power criticality with its demonstration reactor in June 2026, exceeding the DOE's target of three companies succeeding in the pilot program. The achievement validates Antares's advanced microreactor design using HALEU TRISO fuel.