Fission reactors would be very problematic. The reactions always involve highly energetic neutrons. These would require a great deal of shielding to make safe making a portable, high energy one virtually impossible. Even fusion requires us to be very selective of the reactants to eliminate the problem of high energy neutrons.
Both Russia and the US tried to make fission powered aircraft. The reason they never built one was they could not figure out a way to not have the crew suffer from severe radiation poisoning. The advent of ICBMs made both side abandon the idea.
Last edited by mmartin798; 01-18-2015 at 08:09 PM.
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