Space Reactor‑1 Freedom

Uncommon card · No. 174708

Space Reactor-1 Freedom (SR-1) is a pathfinder NASA spacecraft intended to be the first nuclear fission-powered interplanetary mission and to demonstrate nuclear electric propulsion (NEP) in deep space. Announced in March 2026, the spacecraft would combine a closed Brayton cycle fission reactor generating more than 20 kW of electrical power with the Power and Propulsion Element (PPE) previously developed for the Lunar Gateway space station.

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