SUBJECT: TASK INTERFACE AGREEMENT (TIA 2001-14) EVALUATION OF LASALLE WATERHAMMER ANALYSIS (TAC NOS. MB3366 AND MB3367)July 8th, 2002
FiledJuly 8th, 2002By memorandum dated November 2, 2001, Region III requested that the Office of Nuclear Reactor Regulation (NRR) determine whether the continuous long term operation of a single train of the residual heat removal (RHR) system in the suppression pool cooling (SPC) mode is within the LaSalle design basis. In addition, Region III requested that NRR review a LaSalle waterhammer analysis to verify that the RHR system will remain operable and/or functional following a loss-of-coolant accident (LOCA) concurrent with a loss of offsite power (LOOP) during operation of the RHR system in the SPC mode. The Region had been discussing this issue with NRR for several months.