Pete Dietrich on Steam Generator Design Changes at San Onofre Nuclear Power Plant

Q&A Question: Was a Failure Mode Effect Analysis done on these designs before construction was started? NRC: blah, blah, blah. Pete Dietrich: The steam generators were replaced using a [sic] engineering design change package which does look at potential modes of failure of steam generators -- and it looks for understood or anticipated modes of failure. Included in our technical specification changes were two license amendments to change the plugging levels on the new steam generators compared to the old steam generators to move to a lower percentage of through wall wear to plug the steam generator tubes. So we did look at and analyze the potential for wear affecting our steam generators. That was documented in our engineering change package . video-2012-06-18-19-31-49.mp4