No, and this is not some attack on nuclear power. I am just curious. On earth, nuclear power plants use lots of water and cooling towers. How does that work in a place with no spare water?
I also meant to write fission in my original question, not fusion.
Mostly cooling towers are not likely to work in a place with no atmosphere.
Radiators though, are constantly used in spacecraft, and seem to work well. Low gravity, no motion might let the thing be mostly the radiator, with not much support structure. Except it might need to be in shade, in the shadow of a building? hill? solar panels?
I also meant to write fission in my original question, not fusion.