> As far as I know though, Chernobyl and Fukushima had completely different reasons and don't really clump together apart from "both were meltdowns"
A glass-half-empty view of that would be that there isn't a single reason which could be fixed to avoid all future issues. Fukushima AFAIK didn't have the design and operational mistakes which led to the Chernobyl incident, but that wasn't enough to prevent it from having its own incident. Which other causes we might be missing which could lead to new severe incidents in other nuclear power plants?
(And, by the way, the bad part IMO was not "both were meltdowns", but "both were explosions"; if it were just the meltdown, it would stay confined within the power plant, while the explosions are what spread the damage. Yes, they weren't nuclear explosions, but even a non-nuclear explosion in a nuclear power plant is bad.)
A glass-half-empty view of that would be that there isn't a single reason which could be fixed to avoid all future issues. Fukushima AFAIK didn't have the design and operational mistakes which led to the Chernobyl incident, but that wasn't enough to prevent it from having its own incident. Which other causes we might be missing which could lead to new severe incidents in other nuclear power plants?
(And, by the way, the bad part IMO was not "both were meltdowns", but "both were explosions"; if it were just the meltdown, it would stay confined within the power plant, while the explosions are what spread the damage. Yes, they weren't nuclear explosions, but even a non-nuclear explosion in a nuclear power plant is bad.)