When Uranium's tmp (or life?) is set to 235, it should become extremely powerful, at least 5 times as powerful as Plutonium.
The same applies to Plutonium (239), but it becomes 25 times as strong as normal PLUT.
Uses:
Fun!
Makes much stronger bombs
Will be fun for new users to discover.
Nuclear Reactors?
What would it be set to? 239? 244?
I do have a use for uranium in nuclear bombs: hot radioactive fallout.