Tuesday, April 9, 2013

Why fatigue damage will stop the NRC from allowing Unit 2 to restart | Decommission San Onofre





FATIGUE DAMAGE TO SONGS STEAM GENERATORS
J. Hopenfeld 

Provided to the “DAB Safety Team” as additional explanation of the fatigue damage to SONGS steam generators which was discussed in a report by the author and was submitted to the California Public Utility Commission on March 29, 2013


SCE/MHI made a mistake in their stress analysis, which directly impacts the safety of restarting Unit 2.  When the error is corrected, the result clearly shows that Unit 2 has already used up its allowed fatigue life and is not fit for service any longer.  This means that if Unit 2 is restarted at any power level an abrupt pressure change such as inadvertent closing or opening of a valve or a steam line break could lead to a sudden tube ruptures.   The ASME code and NRC regulations do not permit safety components to operate when their fatigue life has been exhausted


more: Why fatigue damage will stop the NRC from allowing Unit 2 to restart | Decommission San Onofre


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