Advanced fission power systems can dramatically enhance space exploration capabilities in the near and father term.

Energy conversion options that are usually considered are heat engines (Rankine cycle, Brayton cycle and Magnetohydrodynamic – MHD) and direct conversion engine (the so-called Traveling Wave Direct Energy Convertor – TWDEC).

There was a proposal for Traveling Wave Direct Energy Convertor that also surveyed advanced nuclear fission space power concepts.

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