1. Expecting current political and economic structures etc to remain for thousands of years is silly, so we do need a more permanent solution to a long-term problem.
2. Keeping lots of nuclear waste in spent fuel pools just increases the risk picture unnecessarily.
If there's a regional instability for a year or two and spent fuel pools boil off and then waste melts through, possibly poisoning the groundwater for that region, that's a big problem.
2. Keeping lots of nuclear waste in spent fuel pools just increases the risk picture unnecessarily.