Nuclear power is like skydiving. If getting it right every time isn't something you're committed to doing, then don't do it.
Great potential in it to save the world, equal potential to destroy the world. Add on capitalist profit chasing and you've tipped the scales.
Also I'd just like to say this because I don't think a lot of people know it: The meltdown was not because the tsunami hit the reactor. It didn't. It hit an unrelated power station that was powering the cooling system, a system that was already extremely controversial due to its completely un-failsafe design and reliance on an external, much more vulrnable power source. This was not an unavoidable act of god, this was completely preventable and a massive insult to injury in an already devastated region following the tsunami.