U.S. Army Strategic Capabilities Office

  • Rendering of Antares Nuclear’s kilowatt-class microreactor system, shown on the NRC’s Antares pre-application activities page. Courtesy: Antares Nuclear/NRC
    Nuclear

    Antares Mark-0 Becomes First Advanced Nuclear Reactor to Achieve Criticality Under DOE Pilot Program

    Antares Nuclear Inc.’s Mark-0—a sodium heat-pipe-cooled microreactor fueled by high-assay low-enriched uranium (HALEU) tri-structural isotropic (TRISO) fuel compacts—has achieved zero-power criticality at Idaho National Laboratory’s (INL’s) Reactor and Critical Experiment (RACE) facility, becoming the first advanced reactor to reach that milestone under the Department of Energy’s (DOE’s) Reactor Pilot Program. The development, announced on June […]