Comment by chickenbig

> if something is radioactive enough to be a hazard then it's radioactive enough to generate power

Only under certain circumstances is it financially worth harnessing this power. I think of space probes and their RTGs. They use alpha emitters like Pu-238, to minimize the shielding requirements.

As for the rest of the stuff, dry casks are good enough. Reprocessing isn’t currently economical while uranium is so cheap, although the vitrification of the fission products can help immobilize the worst radiation emitters, but really the UO2 structure does a decent job of keeping things put.