10 CFR 50, Appendix B, Criterion III, Design Control states, in part, that the design control measures shall provide for verifying or checking the adequacy of design, such as by the performance of design reviews, by the use of alternate or simplified calculation methods, or by the performance of a suitable testing program. Contrary to the above, the licensee did not adequately evaluate, or use other means to demonstrate, that the
RHRSW flow control valves operating in the normal flow regimes would not cause cavitation and subsequent vibration such that the
RHRSW piping hangers would remain functional. This finding is of very low safety significance because a subsequent
operability determination demonstrated that there was no loss of
RHRSW system safety function capability. This finding was entered into the licensees corrective action program as CR2008101568
