This whole thing is being used by the anti-nuclear lobby to point to the dangers of nuclear power -- even though everything went right during and right after the quake.
I live close to a power plant. I don't know what it burns to generate the electricity -- but there is always a large smoke plume visible. Weurt, the small village that's next to the power plant, has a statistically higher number of cancer-related deaths. But of course there has never been a scientific link between the power plant and the cancer (but hey, if the anti-lobby's vague feelings of unrest are a reason to change policy, mine should too).
I don't know what measures have been taken to ensure the safety of the plant. I don't know if it could withstand a plane crashing on top of it. If it blows up, there will probably be a huge cloud of god-knows-what descending on the whole city. Or what's left of it, anyway.