NASA and Energy Department sign broader space nuclear agreement

NASA and the US Department of Energy signed a broader space nuclear cooperation agreement in Washington on October 8, 2026, establishing a framework spanning research, fuel production, testing and mission operations. The agreement supports plans for lunar power and deep-space exploration, but the announcement does not establish that the proposed reactors or propulsion systems are ready to fly.

NASA Administrator Jared Isaacman and Energy Secretary Chris Wright signed the memorandum, titled ‘Accelerating American Leadership in Space Nuclear Power and Propulsion,’ at the Golden Age Summit. Hosted by the White House Office of Science and Technology Policy, the event took place at the Donald J. Trump Institute of Peace. NASA says the agreement takes effect on November 1.

What the NASA–Energy Department agreement covers

NASA’s announcement describes collaboration extending from advanced research and nuclear fuel production through testing, launch integration and operations. It strengthens existing cooperation on fission and radioisotope power systems, bringing those activities within a framework covering the full development process.

‘Nuclear power will allow us to go farther, operate longer, and field more capable spacecraft and instruments than ever before,’ Isaacman said. Wright said his department was ‘proud to partner with NASA as we help American space missions reach uncharted territory.’ Those statements set out the participating agencies’ expectations; the release presents no completed flight demonstration.

Lunar reactor and spacecraft targets

The agency also says a December 2025 executive order directs it to develop a launch-ready lunar surface reactor by 2030. That target concerns readiness for launch: it does not establish that a reactor will be installed and operating on the Moon by that year.

The intended users of lunar nuclear power include habitats, communications equipment, scientific instruments, rovers and infrastructure for using local resources. NASA also identifies future Mars missions as potential beneficiaries. Its announcement does not quantify the proposed lunar system’s electrical output or how many people it could support.

Dragonfly and Rosalind Franklin use radioisotope systems

The agreement also encompasses work beyond fission reactors. NASA says Dragonfly, its rotorcraft mission to Saturn’s moon Titan, is scheduled to launch in 2028 with a Multi-Mission Radioisotope Thermoelectric Generator and 24 lightweight radioisotope heater units. These will supply power and warmth as the vehicle investigates Titan’s habitability.

NASA and the Energy Department also plan to provide 24 similar heater units for the European Space Agency’s Rosalind Franklin Mars rover. Their specified task is to keep instruments warm in the Martian cold; they are distinct from the propulsion systems discussed elsewhere in the announcement.

That cooperation predates the new memorandum. ESA’s May 2024 announcement documented an agreement with NASA covering launch services, landing propulsion elements and lightweight heaters supplied with the Energy Department. ESA described a planned drill reaching up to two metres below the Martian surface to collect samples protected from surface radiation and extreme temperatures.

What earlier research says about nuclear propulsion

A February 2021 National Academies study provides technical context for the ambitions. Commissioned by NASA, it evaluated nuclear propulsion for a hypothetical crewed Mars mission launching in 2039. Its findings need not reflect its sponsor’s views, and it was not an assessment of the agreement signed this week.

The study found that nuclear propulsion could reduce travel time, launch mass and astronaut radiation exposure, while requiring substantial development. It recommended prototypes, ground testing and cargo flights before crewed use. These were potential benefits and recommended development steps, rather than demonstrated mission outcomes.

The Academies distinguished nuclear electric propulsion, which converts reactor heat into electricity for thrusters, from nuclear thermal propulsion, which uses a reactor to heat propellant directly. For its Mars scenario, the study identified challenges including power scaling, system integration and reliability for electric propulsion, and high propellant temperatures, hydrogen storage and ground-test facilities for thermal propulsion.

Implementation details remain unanswered

The immediate next step is the agreement’s November 1 effective date. NASA promises a central commitment to safety, but its release provides no budget, procurement awards, reactor specifications, detailed testing milestones or mission-specific safety assessment. The 2028 spacecraft launch and 2030 lunar reactor readiness dates remain announced targets, without a detailed readiness assessment in the release.