NASA Targets December 2028 Mars Reactor Launch After 28-Person Idaho Lab Review

2 articles · Updated · Post Register · Aug 11

December 2028 remains NASA’s fixed launch window for Space Reactor-1 Freedom, with Administrator Jared Isaacman visiting Idaho National Laboratory for a project status review.
A 28-person delegation toured INL facilities where the reactor is already under construction, including a microreactor test bed, the Fuel Cycle Facility and private-company demonstrations.
INL and NASA officials said Earth-based proof is central to the effort, arguing microreactors can deliver continuous, high-density power for lunar and Martian bases and future nuclear-electric propulsion.
John Wagner cast SR-1 as the first U.S. space reactor launch since SNAP-10A in 1965, saying four advanced reactors recently achieved criticality—three at INL—underscoring momentum behind the program.

Sources

Post Register9d ago

NASA Administrator Visits INL for Space Reactor-1 Freedom Project Update, Targets 2028 Mars Launch

SpaceNews9d ago

NASA Confident in 2028 Nuclear Propulsion Mission After Idaho Lab Visit

Will fierce commercial competition for rare nuclear components derail NASA's ambitious 2028 timeline for its groundbreaking Mars reactor?

What hidden secrets might SkyFall's radar-equipped helicopters uncover beneath the Martian crust once deployed by a nuclear-powered mothership?

SR-1 Freedom and the 20-kilowatt Space Reactor: America’s 2028 Nuclear-Powered Mars Mission and the New Space Race

Overview

Driven by aggressive federal policy, the SR-1 Freedom mission marks a turning point in American space exploration. After a 2025 executive order and a series of successful reactor tests at INL, NASA paused the Lunar Gateway and redirected resources to accelerate the December 2028 launch of SR-1 Freedom. Using advanced HALEU fuel, the mission overcomes traditional chemical propulsion limits, enabling heavier payloads for deep-space travel. Strict safety protocols keep the reactor dormant during launch, while a constrained global HALEU supply chain is managed through DOE support and new transport solutions. This mission paves the way for a lunar reactor and continuous Moon base operations.

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