Which accident are you referring to? https://en.m.wikipedia.org/wiki/Kyshtym_disaster https://en.m.wikipedia.org/wiki/Kyshtym_disaster refers a source that clai

Which accident are you referring to? https://en.m.wikipedia.org/wiki/Kyshtym_disaster https://en.m.wikipedia.org/wiki/Kyshtym_disaster refers a source that claims 8015 deaths and no comparison to coal-fired power plants. Of course, one could argue that the accident was related to processing spent fuel into nuclear weapons material and would not have happened if it had just been buried. Or that it is should not be called waste if it's treated as raw material to something else.