The US Department of Energy has authorized certain reactor designs, with some outlets reporting on specific reactors, such as the Antares Mark-0, achieving criticality or receiving approval. The Nuclear Regulatory Commission is involved in the process, seeking public comment on interim guidance for previously authorized reactor designs and rolling out reforms to accelerate small reactor licensing. The development of small modular reactors and microreactors is underway in the United States, with multiple companies selected for advanced reactor pilot programs, although some reports raise concerns about safety.