You may be interested to know that Particle accelerators can hypothetically be used to treat nuclear waste by transmution, so stockpiles could be made safer that way. Getting energy out of them however would be even better.
I've little idea yet, which is one reason why I chose Earth sciences, it will provide me with a broad base of scientific disciplines and geology graduates go into a huge variety of fields after. My more fancifull desire would be to incorporate painting and illustration somehow, perhaps paleoartistry.