Records show a recurring pattern: Reactor parts or systems fall out of compliance with the rules. Studies are conducted by the industry and government, and all agree that existing standards are "unnecessarily conservative." Regulations are loosened, and the reactors are back in compliance.
At the same time, the shroud of secrecy is descending on international efforts to investigate the recent nuclear disaster in Japan http://www.bloomberg.com/news/2011-06-20/fukushima-disaster-failures-kept-behind-closed-doors-at-un-atomic-meeting.html
Sweeping under the rug seems to be the primary approach to nuclear safety at all levels."
Almost anything derogatory you could say about today's software design would be accurate. -- K.E. Iverson