Antares reaches reactor criticality under Trump pilot program, marking major nuclear milestone

Antares Nuclear's Mark-0 microreactor achieves criticality at Idaho National Laboratory, the first advanced reactor to do so ...
Just The News on MSN

Key milestone reached in nuclear pilot program established by Trump executive order

The program was established by Trump's 2025 executive order directing the acceleration of America's advanced nuclear reactors ...
The Well News on MSN

Energy Department says microreactor has reached critical phase of development

WASHINGTON - The Energy Department said last week that a microreactor developed by Antares Nuclear Inc. reached criticality, ...

Small modular nuclear reactor reaches criticality in first test

The executive order directed the Department of Energy to have three different reactor designs reach criticality in a bit over ...
POWER Magazine

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) ...

US Says Antares’ Small Nuclear Reactor Reaches ‘Criticality’ (2)

The small reactor being developed by Antares Nuclear Inc. participating in an Energy Department pilot program reached “ criticality ,” the agency said in a statement. The milestone occurs when a ...

Antares Achieves Initial Criticality of a Privately Developed Advanced Reactor Under DOE Pilot Program

Antares today announced that its Mark-0 microreactor achieved initial criticality at Idaho National Laboratory (INL) under U.S. Department of Energy (DOE) authorization — making Antares the first ...

Energy Department says advanced nuclear reactor achieves first criticality milestone

Antares Nuclear’s microreactor at Idaho National Laboratory reached criticality, marking the first time a private company has ...
World Nuclear News

First criticality for US microreactor under DOE programme

Antares Nuclear's Mark-0 reactor has completed a zero-power fuelled criticality demonstration, becoming the first reactor to ...

Antares small nuclear reactor first to achieve 'criticality' in DoE pilot program

The US Department of Energy said the first small modular nuclear reactor that is part of its Pilot Reactor Program has ...
United States Army

Antares Nuclear’s successful zero-power criticality test marks major step for military applications of advanced microreactors

Antares Nuclear completed a zero-power criticality test for its Mark-0 demonstrator reactor at Idaho National Laboratory on June 4, 2026. This milestone advances the deployment of next-generation ...

Energy Department says advanced nuclear reactor first to reach critical milestone

The Energy Department says a small nuclear reactor under development at a national lab has reached a crucial milestone that ...