Space

NASA’s SR-1 Freedom Advances with Progress on Nuclear Power Module

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 20/10/2026, 18:20:24 UTC.

Briefings

NASA and partners have agreed to advance the development of the Space Reactor-1 Freedom spacecraft, the first fission-powered vehicle to travel beyond Earth orbit. The nuclear power module, designed by Idaho National Laboratory and supplied by Sierra Lobo Inc., will be integrated with a Brayton cycle conversion system. The spacecraft is scheduled for launch in late 2028 to deliver the SkyFall science mission to Mars, which includes three Ingenuity-style helicopters. This collaboration aims to reduce technical risk and support a 2028 launch target.

Key points

• Space Reactor-1 Freedom is the first spacecraft ever to demonstrate fission power beyond Earth's orbit, scheduled for a late 2028 launch.
• The nuclear power module will use a closed Brayton cycle system to convert thermal energy from a fission reactor into electricity for electric propulsion.

Context

This mission represents humanity's first fission-powered voyage beyond Earth orbit, with the Space Reactor-1 Freedom traveling to Mars to deliver the SkyFall science payload. The collaboration between NASA and DOE's Idaho National Laboratory is critical for advancing the technology extensible to a vibrant space nuclear future.

Limitations

The evidence covers the contract actions and technical specifications for the nuclear power module and spacecraft. It does not include details on the specific development timeline for the fission reactor, the operational status of the Ingenuity helicopters, or the final launch date beyond late 2028.

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