The Japanese are not dummies, and do not put people at risk with sub-quality engineering. I would keep in mind that much of the news out there is "ginned" up to make sales. The Japanese need our thoughts and prayers right now, and do not need any distractions. FWIW, and I am not any sort of an expert concerning nuclear power, I understand much that has happened so far is as planned. The idea is to control the meltdown, but the meltdown will be contained.
Excellent article: http://bravenewclimate.com/2011/03/1...e-explanation/