Measures to prevent nuclear pollution?

nuclear pollition is a problem that is generaly "tackled" by isolating the radioactive material and burying it "out of harms way". it does seem feasable however that they could simply dilute the material and put it back into the world where it originaly came from (as the radioactive materials were mined in the first place and this method would reduce the risk of the material being leaked over time in higher concentration as has happened once in the united kingdom)