The inspectors identified one finding of very low safety significance with an associated Non-Cited Violation of
10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action. Specifically, licensee personnel failed to implement corrective actions for water intrusion into vaults below motor control centers containing safety-related cabling in a timely and effective manner. Consequently, safety-related cabling was exposed to a water environment that if left uncorrected could result in subsequent cable degradation. For corrective action, the licensee performed an inspection of all cable vaults throughout the plant. Also, licensee personnel initiated a root cause evaluation to focus on the leadership and organizational failures associated with the response to the wetted cables in the 1-ABD-A cable vault and the thoroughness of the extent of condition evaluation. This issue was entered into the licensees corrective action program as CR
AR 2010-2558. This finding affected the Mitigating Events cornerstone and was more than minor because the issue could become a more significant safety concern if left uncorrected. Specifically, failure to implement corrective actions for water intrusion into cable vaults could result in subsequent degradation of safety-related cabling. This finding was of very low safety significance because the finding does not constitute a design or qualification deficiency, did not result in a loss of system safety function, and did not meet the seismic, flooding, and severe weather screening criteria. This finding was associated with a cross-cutting aspect in the area of problem identification and resolution corrective action program (
P.1(c))
