July 31, 2025 Officials-in-Charge of Headquarters Offices Directors, NASA Centers FROM: Acting Administrator NASA SUBJECT: Directive on Fission Surface Power (FSP) Development Executive Summary • . • Fission surface power (FSP) is both an essential and sustainable segment of the lunar and Mars power architectures for future human space exploration missions.

Is NASA going to put a nuclear reactor on the moon? Here's what Sean Duffy said about U.S. race against China in space and going to Mars.

Interim NASA Administrator Sean Duffy says his plan to put a nuclear reactor on the moon is part of his plain to "get there first and claim that for America."