Nuclear waste is a huge problem. The nuclear industry always has magical solutions 20 years in the future. The US ends up melting that waste into Depleted Uranium weapons and dumping them on the Balkans or the Middle East (killing millions in the long term).
A single accident at an NPP can kill millions of people. How much would that cost? E.g. a Stuxnet clone can destroy complete states/countries.
Do you have a source for that?