The problem with nuclear plants is the risk is really unknown. One cannot say it is small. For example, nobody considered that Russia would fire artillery agai

The problem with nuclear plants is the risk is really unknown. One cannot say it is small. For example, nobody considered that Russia would fire artillery against nuclear reactors. And now a threat of attacks with powerful conventional weapons against nuclear reactors and waste processing/storage has to be considered very seriously. Similarly we cannot assume that technological progress would not allow a single terrorist with right equipment to trigger another Chernobyl.