NASA’s acting administrator Sean Duffy is moving to fast-track a nuclear reactor for use on the moon while reshaping how the agency works with industry to replace the aging International Space Station. The plan, outlined this week, aims to secure steady lunar power for future missions and set a clearer path for commercial space stations in low-Earth orbit as the ISS nears retirement.
Why Lunar Power Is Rising On NASA’s Agenda
Lunar missions will need reliable energy through long nights, shadowed craters, and dust storms. Solar panels alone may not meet those demands. That is why NASA has been studying small fission systems—reactors that could run through the lunar night, support habitats, mining tests, and science payloads, and cut resupply needs.
In 2022, NASA and the Department of Energy awarded early design contracts to three teams to explore a 40-kilowatt-class fission surface power concept. The aim has been to field a first unit as early as the late 2020s or early 2030s. Earlier, the Kilopower experiment demonstrated a small reactor core in ground tests, showing that compact nuclear power is feasible for space.
“[NASA] plans to accelerate the construction of a nuclear reactor that could be used on the moon,” Duffy said, signaling a shift from studies to hardware.
Acceleration could mean a more focused set of requirements, earlier long-lead purchases like fuel and heat pipes, and integrated testing with lander partners. It may also require stronger coordination with safety and environmental reviews, which are mandatory for nuclear systems launched from Earth.
Rethinking The Post-ISS Future
The ISS has anchored human research in orbit for more than two decades, but NASA plans to retire the station by 2030 and guide it to a controlled reentry. Operating the ISS costs roughly $3–4 billion each year. NASA’s strategy is to shift those funds to purchase services from private stations, a model similar to how it buys cargo and crew flights.
Under the Commercial LEO Destinations effort, companies have proposed free-flying stations such as Starlab and Orbital Reef, while Axiom Space is building modules that start on the ISS and later detach. These projects face budget pressures, tight schedules, and technical hurdles. NASA’s updated approach is expected to refine requirements, reduce overlap among projects, and protect continuous U.S. access to microgravity labs.
Duffy also said NASA will “alter the way [it] will partner with industry to replace the aging International Space Station,” pointing to new contract structures and milestones.
Analysts say a clearer, phased services model could help companies raise capital and avoid a gap in research access. But any delay—either in ISS deorbit planning or in commercial station readiness—could add cost and risk for government and industry alike.
Benefits, Risks, And What Changes Might Look Like
A lunar reactor and a commercial station market serve different needs but share a core goal: sustainable presence beyond Earth without continuous heavy logistics. A nuclear system could power ice prospecting and long-lived instruments on the moon. Private stations could expand research, manufacturing, and tourism in low-Earth orbit once the ISS retires.
The risks are real. Nuclear projects face complex safety approvals and supply chain limits, including qualified fuels and materials. Commercial stations must close business cases, secure customers, and meet strict human-rating requirements.
- Streamlined procurement with clear milestones and fixed-price elements.
- Early ground demonstrations to retire technical risks.
- Coordinated safety and environmental reviews for nuclear systems.
- Bridging plans to avoid gaps between ISS retirement and new stations.
What To Watch Next
NASA is expected to refine timelines for the lunar power system and detail how it will pace design, testing, and launch readiness. On low-Earth orbit, the agency will likely update selection paths and service-buy plans as budgets and designs mature. Industry will look for signals on technical requirements, on-ramps for providers, and the timing of ISS deorbit milestones.
If the acceleration holds, lunar surface missions could gain a steady power source sooner than planned, supporting Artemis objectives. And a sharper partnership model for post-ISS stations could stabilize a young market that NASA will depend on for research, crew training, and national presence in orbit.
Duffy’s push ties two decisions together: power that keeps lunar operations running through darkness, and a contract strategy that keeps science and industry active in orbit. Success will depend on funding discipline, safety rigor, and schedules that align with both the moon and low-Earth orbit. The next year will show whether NASA and its partners can deliver on both fronts at once.
