Regarding the argument that nuclear power plants "always work", I would like to point out that in France, a lot of them are built next to rivers and use river w

Regarding the argument that nuclear power plants "always work", I would like to point out that in France, a lot of them are built next to rivers and use river water for cooling. Except in summer, when the water in the rivers becomes too warm to be effective in cooling. As far as I recall, a while back, during a really hot summer in Europe, the power output of French nuclear plants went down a lot. As global warming progresses, this kind of problem is probably going to become more common.