Deaths per terrawatt hour is not a useful metric. Even if that number is certain to be higher with everyone favorite whipping boy, coal or oil, natural gas, solar whatever there is very little that can go wrong with those which would render a large area unlivable all at once. The deaths and health costs they create are spread over time. Society can budget for and deal with those costs and even cope with the occasion colamity.
With neuclear on the other hand the absolute costs might be less but the potential to have bear them all at once exists and it could very well be a back breaker for any society, that is the prespective you have to use.
This is certainly deserving of +5 insightful, but I disagree with it, and for the following reason: deaths per Twh gives some perspective to an otherwise ridiculously one-sided debate about the dangers of nuclear. If we had had more Gen II nuclear reactors built during the 70s instead of panicking about very unlikely accidents, then our current energy problems would be far, far less troublesome.