Antares Mark-1 microreactor clears DOE safety checkpoint

The US Department of Energy approved the Nuclear Safety Design Agreement for Antares' Mark-1 power-generating microreactor, clearing construction and testing at Idaho National Laboratory. The reactor will run at full power for six months in 2027, with first military deployments at Fort Bragg starting in 2028.

• DOE approved the Nuclear Safety Design Agreement for Mark-1
• Six-month full-power test campaign planned for 2027
• First military deliveries at Fort Bragg begin in 2028
• Space Force awarded $161 million for the orbital R1-S reactor