Sure, but the difference is unburnt coal is a negative externality, and nuclear waste is a negative internality (I don't think this is a word, but it should be). Unburnt coal is not handled by the people producing it, and it's forced on everyone else. Nuclear waste is easily controlled and managed, and paid for by the people producing it. That's part of the reason nuclear costs what it costs. It doesn't hurt anyone and takes up a very small amount of space. Contained in a concrete container, you can stand around it, lick it, or do whatever else you want with it with essentially zero risk. The biggest issue with nuclear is just the bureaucracy that makes them take so long to build that they can't help with the current issue, and that's also why micro-reactors are being looked into more seriously lately.