The costs of protecting nuclear waste for 100.000 years from terrorists and during wars will be impossible. It's a super easy target. Just attack the power plants and nuclear waste facilities of the opponent and you have won the war.

Well we've had them since the 1950s, where are all these terrorist attacks? The only nuclear disasters have been accidental, and those were made worse by early reactor designs that didn't account for safety to the degree necessary.

The Twin Towers were attacked almost 30 years after.