The biggest coal, gas and dam failures were all pretty bad and often on a level with nuclear. The 'worst case' with a modern reactor is basically zero to very

The biggest coal, gas and dam failures were all pretty bad and often on a level with nuclear. The 'worst case' with a modern reactor is basically zero to very few people die and there is some leaked out radiation. This is what happened in Fukushima. Its hard to find a worse case with a modern reactor.