Why doesn't Elon Musk develop nuclear power?

One can't help but notice that Elon Musk seems very interested in virtually every area of technological development, with the very noticable exception of nuclear power. This seems particularly puzzling, in light of his obvious interest in deep space travel. Surely, given the incredible edge of thousands of times the efficiency of nuclear fusion over conventional energy sources for conventional rockets, it would be of interest to Mr. Musk to attempt to develop this alternative and extremely important source of energy. And with his experience, training and resources, he might be uniquely situated to proceed on this very important task. Does he simply consider nuclear power "bad business"? Surely, there would be money to be made here. Is it too dangerous, or too expensive, perhaps? Danger or expense don't seem to have frightened Mr. Musk off from anything in the past. Is it possible he's afraid of alienating his environmentalist allies -- supporters of his largest enterprise, Tesla Corporation -- by proceeding with research and development of nuclear power? Surely, deep space applications of nuclear power wouldn't antagonize Mr. Musk's environmentist friends. How much environmental damage could nuclear power do to the Moon, or the Asteroid Belt? So, why is Mr. Musk so religiously avoiding research and development on nuclear power, exactly? Any thoughts?