A policy memo with unusually short deadlines
The White House has told the Pentagon and NASA to accelerate plans for nuclear reactors in space, setting a timetable that would move the technology from long-range ambition into near-term program planning. According to Defense One, a new six-page policy memo calls for a dual design competition that would produce a near-term demonstration and use of low- to mid-power space reactors in orbit and on the lunar surface.
The timeline is aggressive. The policy says agencies should aim to deploy nuclear reactors in orbit as early as 2028 and on the Moon as early as 2030. That is not merely a statement of interest. It is a deadline-driven directive aimed at forcing concrete use-case development, agency coordination and private-sector engagement within a compressed window.
The memo frames the effort in expansive terms, saying the United States will lead in developing and deploying space nuclear power for exploration, commerce and defense. Michael Kratsios, director of the White House Office of Science and Technology Policy, tied the move to the administration’s broader push to ensure U.S. space superiority.
Why nuclear power is back at the center of space planning
Space missions have always faced a power problem. Solar energy works well in many contexts, but not every mission profile is well served by panels, batteries and periodic exposure to sunlight. Long-duration operations, energy-intensive payloads and activity on the lunar surface all raise the stakes. The new policy reflects a judgment that future civil and military ambitions in space will require more durable, higher-output power sources.
Kratsios argued that nuclear power in space can provide the sustained electricity, heating and propulsion needed for a permanent robotic and eventually human presence on the Moon, Mars and beyond. That framing is important because it puts power generation at the center of strategy rather than treating it as a supporting technology. The administration is effectively saying that sustained presence in space depends on solving energy supply first.
For NASA, that logic connects to long-term exploration architecture. For the Pentagon, it connects to resilience, persistence and power-hungry mission systems. The same reactor class could support different mission sets, but the policy suggests the government now wants both agencies moving in parallel rather than on separate timelines.
