NRC has already indicated that the radioactive steam leak from one of the steam generators at San Onofre Nuclear Generating Station in southern California stems from the faulty design by Mitsubishi Heavy Industries:
NRC officials said it appears that simulations by Mitsubishi underpredicted the velocity of steam and water flowing among the tubes by a factor of three to four. The rate of flow caused the tubes to vibrate and knock against each other.
Now, why would they have done that? The steam generators that Mitsubishi Heavy Industries design, manufacture and sell are about 1/3 to half the size of the ones they delivered to San Onofre. Did MHI engineers forget to change the default number for the simulation, which may have been set for much smaller steam generators? It can't be that elementary, can it?
So far, MHI hasn't released any statement on San Onofre.
From East County Magazine (11/26/2012):
NRC TO HEAR CITIZENS OVERSIGHT ARGUMENTS ON LICENSURE AMENDMENT FOR SAN ONOFRE DEC. 5
November 26, 2012 (Washington D.C.)-- The U.S. Nuclear Regulatory Commission, Atomic Safety and Licensing Board (NRC) has ordered that oral arguments be heard at 1:00 pm EST on Wednesday, December 5 from Citizens' Oversight (COPS) and Southern California Edison (SCE) regarding a license amendment request by SCE for the San Onofre Nuclear Generating Station.
“COPS requested that the event be held near San Onofre, but the NRC refused to hold it so that local residents can attend,” Ray Lutz, founder of COPS, a watchdog group based in San Diego’s East County, stated in a press release. For the benefit of the public, the proceeding will be webcast at http://www.visualwebcaster.com/event.asp?id=91000.
Oral arguments will be heard in the Rockville Hearing Room, located on the third floor of Two White Flint North, 11555 Rockville Pike, Rockville, Maryland. The proceeding will be open to the public in Maryland; SCE attorneys and NRC staff will be attending in person.
(Full article at the link)
Even without the faulty steam generators, this particular nuclear power plant shouldn't have been there anyways, right on the beach...