The White House has directed NASA, the Department of Energy, and the Pentagon to compete in designing space reactors, aiming for demonstrations in orbit by 2028 and on the Moon by 2030 as part of a broader push for space nuclear power.

NASA chief Jared Isaacman frames Artemis II as the start of a new era of exploration and stresses nuclear power as essential for a lasting lunar presence.

A memo, issued four months after an executive order on lunar nuclear power, calls for near-term demonstrations of low- to mid-power space reactors both in orbit and on the lunar surface to enable a permanent moon base.

The initiative prioritizes private-sector participation, flexible contracting with milestone-based payments, parallel vendor competitions, and integration of commercial supply chains to grow the industrial base.

The plan is pitched as a major opportunity for aerospace, defense, energy, and advanced manufacturing firms, with potential federal funding and policy challenges noted for participation.

It envisions partnerships with private-sector innovators to develop cost-effective solutions and establish technological viability for exploration, commerce, and defense in space.

Experts underscore the Moon as the central stepping-stone for broader space ventures, enabling technology testing and sustainable life support away from Earth.

The initiative argues nuclear power offers propulsion and power where solar is ineffective, noting solar energy is only about 4% effective beyond the outer planets.

There are existing U.S. efforts in terrestrial microreactors for bases, with recent site selections at Buckley Space Force Base and Malmstrom AFB and ongoing pilot testing at Eielson AFB.

Artemis II’s success is framed as validating the hardware, navigation, and life-support systems needed to return to the Moon and build a long-term presence.

Historical context references the NERVA program, signaling a renewed NASA lineage with modern technology from the Energy Department and military developments.

Experts acknowledge timelines are ambitious; some say demonstrating a space microreactor by 2028 is highly challenging and may be unrealistic due to space-testing hurdles.