That spent fuel is viable fuel for a different type of reactor. If I'm not mistaken, those reactors are forbidden in the US. They could be used elsewhere though.

Reprocessing or storing 100 or better yet 1,000 year old fuel is way more cost effective, so it may be a net benefit to keeping it above ground to decay.

> You're talking about the risk of accidents, what about long term storage of spent fuel?

Thinking total risk, end-to-end, including reduction of risks associated with other technologies.