Death tolls aren't the only impact of a nuclear disaster. Denial of land use for tens to hundreds of years, cleanup costs, mutations, denial of water supplies if it reaches ground water (the prevention of which was one of the things that did work out well at Chernobyl). All with cleanup costs a magnitude higher than those of industrial spills.
We're all going to die eventually of something and of those 8M many would have died soon after of other causes. Look at how many people still smoke packets full of hazardous fume sticks on a daily basis. That's how much we care about that risk.
The difference being that smoking is a personal decision and living near a nuclear power plant isn't. Especially if we were to scale it up to replace fossil fuels. which would mean on the order of ten times as much sites and risk.
We're all going to die eventually of something and of those 8M many would have died soon after of other causes. Look at how many people still smoke packets full of hazardous fume sticks on a daily basis. That's how much we care about that risk.