A finding of very low safety significance and associated
NCV of
10 CFR Part 50, Appendix B, Criterion III, Design Control, was identified by the inspector for the failure of the
High Pressure Coolant Injection (
HPCI) vacuum breaker piping configuration to be in conformance with the piping design analysis of record. The licensee entered this issue into its
CAP and was able to demonstrate the vacuum breaker piping to be
operable during design basis accident conditions. The finding was determined to be more than minor because the finding was similar to
IMC 0612, Appendix E, Example 3a. Specifically, to restore conformance of the
HPCI vacuum breaker piping to the piping design basis analysis of record, a modification to the existing piping configuration was necessary. The inspector determined the finding was of very low safety significance because it was a design deficiency that did not result in actual loss of safety function. The inspector determined there was no cross-cutting aspect associated with this finding
