The inspectors identified a finding of very low safety significance and an associated
NCV of
10 CFR Part 50, Appendix B, Criterion XI, Test Control. Specifically, the licensee failed to identify and periodically perform the necessary testing on safety-related thermal
overload relays/heaters (
TOLs), installed in 1993, in the alternate power feed to isolation condenser reactor inlet valves 2-1301-4 (Unit 2) and 3-1301-4 (Unit 3). Periodic testing of the
TOLs is required to ensure the valves can perform their Appendix R
safe shutdown functions, when required. Upon discovery, the licensee entered the issue into its corrective action program, initiated predefine parameters (
PMID) and created surveillance work orders to test the
TOLs at the next opportunity. There was not a cross-cutting aspect to this violation. This issue was more than minor in accordance with
IMC 0612, Appendix B, Issue Disposition Screening, because the finding was associated with the Equipment Performance attribute of the
Mitigating Systems Cornerstone and affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to
initiating events to prevent undesirable consequences (i.e., core damage). The finding was of very low safety significance because the finding did not represent an actual loss of functionality of the isolation condenser system containment isolation valves
