Antares Energy's Mark-0 small modular reactor achieves criticality at Idaho National Laboratory, first SMR design to reach this milestone since Trump administration's nuclear acceleration order.

Antares Energy's Mark-0 small modular reactor achieves criticality at Idaho National Laboratory, first SMR design to reach this milestone since Trump administration's nuclear acceleration order.

Validates SMR feasibility as distributed nuclear source for AI data center power demand; establishes commercial pathway for non-traditional energy infrastructure.