The cost of a nuclear power plant is pretty high, but not because of the dangers. Rather, the expensive part is inherent with all reactors, and has to do with how it is constructed. IIRC, Nuclear reactors need a few years to "warm up" before they begin producing power, so you basically have to pay people to work on (and in) the reactor all the while knowing that they won't be producing anything that can make you money. In short, a big reactor is a very expensive investment, but eventually it pays off.
I'd say 3 incidents in the almost 50 years of solid nuclear power usage is a pretty good track record. These incidents were also relatively "contained", that is, their meltdowns didn't trigger worldwide environmental catastrophe, or even a catastrophe inside their own countries.
It appears that Fukushima isn't exactly over. And, it's clear that in the case of a disaster, nobody needs to take responsibility. Who is holding Tepco accountable?
I'd say 3 incidents in the almost 50 years of solid nuclear power usage is a pretty good track record. These incidents were also relatively "contained", that is, their meltdowns didn't trigger worldwide environmental catastrophe, or even a catastrophe inside their own countries.