IDAHO FALLS, Idaho–(BUSINESS WIRE)–The advanced nuclear energy company Antares received U.S. Department of Energy (DOE) approval of the Documented Safety Analysis for its Mark-0 reactor under DOE standard 1271. This approval follows Antares’ Preliminary Documented Safety Analysis approval in January 2026. This milestone reflects DOE’s acceptance of the final design for the Mark-0 reactor and the safety case supporting it. Antares now begins the DOE Readiness Review process, the final phase be