I do think that what Fukushima shows is that when you have a nuclear power plant, you have the possibility of really big problems caused by natural disasters we

I do think that what Fukushima shows is that when you have a nuclear power plant, you have the possibility of really big problems caused by natural disasters well above what you planned for. The questions are what you can plan for and what you do plan for? Ideally we'd put nuclear reactors way away from all natural disasters, and design them to withstand magnitude 10 earthquakes, F-5 tornadoes, Category 5 hurricanes, and, say, bombing by massive conventional munitions during wartime. And we'd have perfect, guaranteed safe forever storage of waste. Practically, it isn't clear that this is possible. I think the reality is: we need to make nuclear energy didn't work. TEPCO could't do it. Hopefully someone else can. The question is, do we want these things to work until they don't? Or do we want them to be guaranteed to work no matter what happens? I am not sure the latter is possible.