A finding of very low safety significance and associated non-citied violation of
10 CFR 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, was self-revealed on March 1, 2013, during restoration from the 1B
core spray logic test, when the 1/2 diesel generator cooling water pump (DGCWP) was discovered to have been lined up to Unit 2
emergency core cooling system room coolers instead of Unit 1 coolers as expected. The operators that had performed the initial valve manipulations on February 28, 2013, did not complete the alignment as required by QCOP 6600-15, 1/2 Diesel Generator Cooling Water Pump Cross Connect Alignment. Specifically, the operators executing QCOP 6600-15 did not follow the procedure for aligning the Unit 1/2 DGCWP to supply the Unit 1
emergency core cooling system room coolers. The issue was entered into the licensees
CAP as
Issue Report 1486754, and the licensee restored operability of the Unit 1 DGCW pump to restore compliance. Standdown briefings were conducted for all station operators to discuss the event lesson learned, and performance management actions were implemented for the operators involved in the event. This issue was more than minor because it adversely affected the Reactor Safety
Mitigating Systems Cornerstone objective to ensure the availability, reliability, and capability of systems that respond to
initiating events to prevent undesirable consequences in that failure to align cooling water per the procedure adversely impacted the cornerstone attribute of Configuration Control for operating plant equipment lineups. Specifically, the as-left equipment lineup was different than that reported to the main control room when the activity was completed. The inspectors determined the finding could be evaluated using the
SDP in accordance with
IMC 0609 Appendix A, The
Significance Determination Process For Findings At-Power. The inspectors answered all questions of Exhibit 2,
Mitigating Systems Screening Questions, Section A - Mitigating
SSCs and Functionality (Except Reactivity Control Systems) No, and therefore, the finding screened as Green or very low safety significance. This finding has a cross-cutting aspect in the area of Human Performance - Work Practices because the licensee personnel did not use human performance tools and techniques to ensure proper execution of the task
