CANDU doesn't chemically re-process it (no purification). It just physically breaks it up into fuel rods that it can use. A CANDU reactor can run on unprocessed

CANDU doesn't chemically re-process it (no purification). It just physically breaks it up into fuel rods that it can use. A CANDU reactor can run on unprocessed, raw (just-pulled-it-out-of-the-ground) uranium, which light water reactors cannot do without chemical reprocessing.