A Non-Cited Violation was identified during the review of a 1995 modification, installed in the cooling water system supply for the
Auxiliary Feedwater Pumps. The design change review process did not consider the increased failure rate of the
AFW system due to the increased probability that the
AFW pump would trip on low suction pressure with the modification installed. Criterion III of
10 CFR Part 50, Appendix B requires that design changes be subject to design control measures commensurate with those applied to the original design, including verifying or checking the adequacy of the design by the performance of design reviews, calculations, or testing. The failure to determine the effect of a design change on the
AFW system performance was identified as a violation of Criterion III of
10 CFR Part 50, Appendix B.
