NUCLEAR RACE TO THE MOON: NASA Pushes for 2030 Lunar Reactor as U.S. Moves to Beat China and Russia
NASA is accelerating plans to put a nuclear reactor on the moon by the end of 2030, setting up a new phase of the global space race as the United States seeks to establish a permanent lunar presence years before a competing Russian-Chinese nuclear project is expected to become operational.
The American space agency is moving ahead with Lunar Reactor-1, or LR-1, a compact fission power system designed to operate near the moon’s south pole. NASA wants the reactor deployed by December 2030, approximately six years before Russia expects to have its own lunar reactor operating as part of a joint project with China.
NASA’s Glenn Research Center released draft contracting documents in late August laying out requirements for LR-1. The reactor is expected to generate 20 kilowatts of electricity and operate continuously for at least five years without routine maintenance or human intervention.
The system would use high-assay low-enriched uranium, known as HALEU, rather than highly enriched uranium, and employ a closed-loop Brayton power-conversion system. NASA’s requirements call for the reactor to function automatically even when communications with Earth are intermittent and to withstand the severe conditions near the lunar south pole.
Reliable power is considered essential to plans for a lasting human presence on the moon. Solar power has significant limitations on the lunar surface, where darkness can persist for extended periods and permanently shadowed craters receive no sunlight at all. Those same regions are particularly important because scientists believe they contain deposits of water ice that could eventually support astronauts and potentially be processed into rocket propellant.
NASA says nuclear fission could provide uninterrupted electricity regardless of sunlight, allowing astronauts to heat habitats, operate scientific equipment, charge lunar vehicles and support other infrastructure needed for a permanent base.
The 2030 deadline also reflects an increasingly intense strategic competition among the United States, China and Russia over who will establish a lasting presence on the moon first.
Russia has assigned its state nuclear corporation Rosatom and the Kurchatov Institute to develop a lunar reactor known as Selena. The Russian system is intended to provide power for the China-led International Lunar Research Station, a planned network of installations on and around the moon.
Current Russian plans call for Selena to become operational by 2036. The reactor is expected to generate as much as 10 kilowatts and function autonomously for approximately a decade. Russian officials have said a prototype could be completed several years earlier, with a sequence of missions eventually delivering the infrastructure and nuclear power system to the lunar surface.
China and Russia have steadily expanded their lunar partnership, with Chinese President Xi Jinping and Russian President Vladimir Putin placing considerable emphasis on cooperation in space. The International Lunar Research Station is intended to become a long-term scientific and exploration facility, with its principal infrastructure concentrated around the lunar south pole.
NASA officials are particularly concerned that whichever country establishes major infrastructure in the most desirable areas of the lunar south pole first could gain a significant strategic advantage. The region contains limited locations offering favorable lighting, terrain and access to suspected ice deposits, raising questions about how competing bases and equipment will operate in close proximity.
The United States is therefore pursuing a broader plan that goes well beyond a single reactor. NASA has shifted its lunar strategy toward establishing a surface base and building the infrastructure necessary for sustained human operations rather than limiting Artemis to a series of individual astronaut visits.
President Donald Trump has made American leadership in space a component of his broader America First agenda, and the administration’s national space policy calls for the United States to expand its presence on the moon while developing nuclear power and propulsion technologies for missions deeper into the solar system.
Before attempting to place LR-1 on the lunar surface, NASA plans a major nuclear demonstration much farther from Earth.
In December 2028, the agency is targeting the launch of Space Reactor-1 Freedom, or SR-1 Freedom, which NASA says would become the first fission-powered interplanetary spacecraft. The spacecraft is slated to travel toward Mars while demonstrating nuclear-electric propulsion in deep space.
SR-1 Freedom will carry a 20-kilowatt fission system fueled with HALEU. After escaping Earth’s gravity, NASA plans to activate the reactor and use the electricity it produces to power electric thrusters. The mission will also carry three Mars helicopters, known collectively as SkyFall, which are designed to investigate possible future exploration areas and search for subsurface water ice.
NASA views that mission as a technological stepping stone to Lunar Reactor-1. By flying and operating a reactor in space before attempting a lunar landing, the agency hopes to demonstrate the hardware, establish nuclear-launch procedures, develop an American supply chain and resolve technical problems before the 2030 lunar mission.
The effort marks a dramatic revival of American space-fission technology. The United States has flown only one nuclear fission reactor in space: SNAP-10A, launched in 1965. Although Washington has spent billions of dollars on various space-nuclear programs in the decades since, none resulted in another operational American reactor being deployed in space.
Russia and the Soviet Union accumulated considerably more experience in that area, launching more than 30 nuclear reactors into orbit, primarily aboard military satellites during the Cold War.
The Pentagon is also pouring money into the return of American nuclear technology to space. The U.S. Space Force recently awarded California-based nuclear startup Antares a $161 million contract to advance a reactor system designed for spacecraft.
Under that program, Antares is developing its R1-S space reactor and is expected to conduct a nuclear ground demonstration before integrating the reactor with a spacecraft for eventual flight certification. The award is part of a wider Defense Department effort to develop reliable power sources for military and national-security operations in space.
The rapid expansion of nuclear projects beyond Earth has also raised safety concerns among nuclear specialists, who warn that the renewed competition among major powers could create pressure to move faster than prudent safety practices allow.
Edwin Lyman, director of nuclear power safety at the Union of Concerned Scientists, told The New York Times that adding nuclear technology to the accelerating competition in space “could take a potentially more dangerous turn.”
American and Russian engineers maintain that lunar reactors can be transported safely because the systems would remain shut down during launch and the journey to the moon. The reactors would become operational only after reaching their destinations, sharply reducing the amount of radioactive material that could be dispersed if a launch vehicle exploded or failed during flight.
History nevertheless provides a warning about what can happen when nuclear hardware in space goes wrong. In 1978, the Soviet nuclear-powered reconnaissance satellite Kosmos 954 reentered Earth’s atmosphere unexpectedly and scattered radioactive material across a vast stretch of northern Canada. A major Canadian-American recovery effort subsequently searched thousands of square miles for radioactive debris.
Safety concerns do not end once a reactor reaches the moon. R. Scott Kemp, an associate professor of nuclear science and engineering at MIT, has warned that an accident on the lunar surface could prove particularly difficult to contain because a compact lunar reactor cannot be surrounded by the massive containment structures commonly used at terrestrial nuclear plants.
Another challenge is obtaining sufficient nuclear fuel. NASA’s plans specify HALEU, which contains a higher concentration of the uranium-235 isotope than fuel typically used in commercial American nuclear power plants. Supplies of HALEU remain limited as Washington attempts to establish a larger domestic production capacity.
The issue has become more complicated since the United States moved to prohibit imports of Russian uranium beginning in 2024, part of Washington’s effort to reduce dependence on Russia’s nuclear-fuel industry following Moscow’s invasion of Ukraine.
Rep. Bill Foster, D-Ill., a physicist, has separately raised proliferation concerns surrounding the possibility of using highly enriched uranium for space missions. Foster warned that highly enriched material could potentially be converted for weapons purposes with little more than “a machine shop and a little bit of high explosive.”
NASA’s current LR-1 documents, however, call for high-assay low-enriched uranium rather than highly enriched uranium, an important distinction as the agency attempts to balance performance requirements with nuclear-security concerns.
The race is ultimately about far more than powering a handful of machines. Both the American and Chinese-led programs envision the lunar south pole as a foothold for permanent operations, scientific research, resource extraction and eventually missions farther into the solar system.
NASA’s current timetable would put the American reactor on the lunar surface in 2030, while Russia’s Selena system is targeted for operation by 2036. If those schedules hold, the United States could establish nuclear-powered lunar infrastructure years before the Russian-Chinese partnership — turning an engineering competition that once sounded like science fiction into one of the most consequential elements of the new race for the moon.
