Looks like the British are taking an interest in the concept too:   
      
   "Rolls-Royce and the UK Space Agency have signed an agreement to study the   
   application of nuclear energy in space exploration. The first contract between   
   the two organizations, the project will examine how nuclear energy can both   
   power spacecraft and be used for deep-space propulsion.   
      
   As humanity becomes more of a spacefaring species, there is a growing need   
   for power systems and propulsion engines that are closer in scale to their   
   terrestrial counterparts. There's a limit to what can be done with chemical   
   rockets and small robotic spacecraft operating in low-Earth orbit, and these   
   limits are being very rapidly reached."   
      
   See:   
      
   https://newatlas.com/space/rolls-royce-uk-space-agency-nuclear-power-space/   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)