The rules are not strict or clear cut, in UK we recently had a skyscraper burn down (grenfell tower). The residents complained that it was a fire hazard for years. The court case is going on for the second year, and it's still unclear if regulations were broken, or regulations themselves are broken.
But even if we adopt your point of view, is the civil defining rules for safety of nuclear powerplants paid even 1% of the damage Fukushima has caused?