Will we find Uranium In Space?

Will we find Uranium In Space?
Hello Gang,
Forgive me for the idiosyncratic habit of asking too many questions. Its one of the quirks in character I have retained since childhood.
Some people within the space community have called for the development of nuclear rocketry (NERVA and PROMETHEUS) for the next wave of exploration of solar system. The question I have is this: Given the concerns of a possible Challenger style disaster and the possible consequences if such a disaster involved a nuclear reactor upper stage, wouldn't it be wise to develop this type of nuclear propulsion on the Moon instead?
So here is my related question: What are the chances of finding reserves of Uranium ore on the Moon or asteroids?
Alex Michael Bonnici