The United States, Russia and China are accelerating development of compact nuclear reactors for deployment on the lunar surface, seeking to meet the energy needs of future Moon bases. The shift marks a move beyond one-off missions and crewed landings toward infrastructure-scale energy systems on another world, opening a new phase of space-energy geopolitics and posing fresh questions for international space governance, the outer-space treaty regime and the risk of a new kind of arms race.

What happened

Drawing on coverage by The New York Times, Reuters and SpaceNews, the major-power race to put nuclear reactors on the Moon can be summarised as follows:

• Technical path: All three countries are advancing designs for small modular nuclear reactors, intended to deliver continuous power for Moon bases during the roughly fourteen-Earth-day-long lunar night, when solar arrays cannot generate electricity.
• Strategic motive: Long-term presence on the Moon requires a stable, compact energy source that does not depend on sunlight, and nuclear reactors are seen as the key infrastructure supporting research equipment, robotic operations, water-ice processing and future crewed facilities.
• US progress: NASA is working with several energy and defence contractors on compact nuclear reactors designed to operate on the lunar surface, with a target of first deployment before 2030 and a role as a core element of the post-Artemis infrastructure.
• Russian plans: Roscosmos has published a lunar nuclear-energy concept built around mature reactor designs, with the goal of energy self-sufficiency for a Moon base by the end of the decade.
• Chinese roadmap: China has incorporated nuclear energy into its long-term roadmap for the international lunar research station concept, advancing it in step with the Chang’e lunar exploration programme.
• International coordination: So far, the United States, Russia and China are pursuing separate projects, with no shared technical standards or coordination mechanism. The current outer-space treaty regime also lacks clear rules for lunar nuclear deployments.
• Security debate: Some arms-control and space-law experts warn that, although the projects are positioned as civilian and scientific, the underlying nuclear materials and the miniaturisation of related technologies deserve close monitoring.

The New York Times notes that whichever country first operates a stable nuclear energy system on the Moon will likely hold a first-mover advantage in future lunar research, resource extraction and strategic layout, making this one of the defining issues of twenty-first century space competition.

Wider perspective

The US-Russia-China race to deploy nuclear reactors on the Moon shows how twenty-first century space competition is shifting from exploration milestones toward permanent infrastructure.

First, lunar energy systems are becoming a critical infrastructure variable in space competition. For most of the past half century, space competition has revolved around launch capability, the number of probes and the milestone of crewed landings. The current focus is shifting toward building a long-term, sunlight-independent energy system on the lunar surface. The shift means that whoever masters lunar nuclear power will hold the energy sovereignty over future lunar research, resource extraction and crewed presence.

Second, the outer-space treaty regime is facing a fresh round of adjustment pressure. Existing outer-space treaties set out principled limits on military operations and weapons of mass destruction on celestial bodies, while leaving the rules for civilian nuclear reactors, lunar resource extraction and base construction ambiguous. As more countries accelerate lunar nuclear projects, the treaty regime urgently needs a new round of multilateral discussion on the transport of nuclear materials, safety standards for lunar nuclear facilities, and the allocation of accident liability.

Third, the proliferation risk from miniaturised nuclear technology deserves international vigilance. Lunar nuclear reactor development involves the small-form-factor packaging of highly enriched uranium, radiation shielding and remote automated operation. If such know-how were to spread, it could indirectly pressure the global non-proliferation system. Ensuring that nuclear materials and technologies are not misused while lunar nuclear cooperation advances will be one of the central challenges for future international governance.

Fourth, the lunar nuclear-energy race could become a potential trigger for a new round of space arms competition. Although major countries frame their projects as civilian and scientific, the reactors themselves have strategic value. Their location, operating status and maintenance could shape other countries’ space situational awareness and operational judgments. Strengthening transparency, crisis communication and confidence-building around lunar nuclear projects is therefore important for preventing space competition from spiralling out of control.

Fifth, a new window is opening for commercial space and international cooperation. Lunar nuclear reactor projects span energy, space, materials and automation, with high technical thresholds, long cycles and large investment, and they objectively require deep collaboration between governments and commercial space players. This trend opens a new window for commercial space, international research cooperation and cross-border technical standard setting, and may become an important topic for global technology governance in the future.

Multiple perspectives

• NASA: Positions lunar nuclear energy as a core element of the post-Artemis infrastructure, with a target of first deployment before 2030.
• Roscosmos: Has published a lunar nuclear-energy concept built around mature reactor technology, aiming for energy self-sufficiency for a Moon base by the end of the decade.
• China National Space Administration: Has incorporated nuclear energy into the long-term roadmap for the international lunar research station concept, advancing it alongside the Chang’e lunar exploration programme.
• International arms-control and space-law scholars: Call for a new round of multilateral discussions under the outer-space treaty regime on lunar nuclear deployment, the transport of nuclear materials and the allocation of accident liability.
• Commercial space companies: See lunar nuclear energy as a high-barrier, long-cycle market opportunity and are accelerating their technology reserves and systems-integration capabilities by participating in national projects.
• International research institutions: Focus on the role of lunar nuclear energy in supporting future water-ice extraction, mineral development and deep-space exploration, and call for strengthened international research cooperation and data sharing.

Editor: GoodInfo Global News Desk