The NASA planned 2028 nuclear powered ion drive spacecraft, SR-1 Freedom will have a 20 kilowatt nuclear reactor. SR-1 Freedom will use 20-plus kilowatt fission reactor fueled by High-Assay Low-Enriched Uranium and Uranium Dioxide, encased in a Boron Carbide Radiation Shield. This will power a xenon ion drive. Previous nuclear spacecraft designs involved more powerful ... Read more