U.S. Government Finds that Reactor for Moon Does Not Require Bomb-Grade Uranium Fuel

NPPP Obtains Report under Freedom of Information Act

AUSTIN (NPPP PR) – The nuclear reactor that NASA plans to launch to the Moon’s surface later this decade to power a manned mission would not require weapons-grade, highly enriched uranium (HEU) fuel, according to a government study released yesterday that contradicts previous assertions. The report, “Analysis of Alternative Core Designs for Fission Surface Power Capability Demonstration Mission,” was released to the Nuclear Proliferation Prevention Project at the University of Texas at Austin, in response to a Freedom of Information Act request.

As recently as 2018, U.S. officials had claimed that bomb-grade fuel was necessary to reduce the weight of space power reactors and had tested such a reactor at a national laboratory. By contrast, the new report reveals that using low-enriched uranium (LEU) fuel, which is unsuitable for nuclear weapons, would not increase the total weight of the reactor system if a “moderator” were used to slow down the neutrons to facilitate nuclear fission.