A self-revealing Apparent Violation (
AV) of
10 CFR 50 Appendix B, Criterion V, Instructions, Procedures, and Drawings, was identified for the licensees failure to establish an adequate preventive maintenance program as required by procedure NPG-SPP-06.2, Preventive Maintenance. Specifically, the
Residual Heat Removal Service Water Pump D1 Cross-Tie to
Emergency Equipment Cooling Water Valve (0-FCV-067-0048), was not maintained in a manner that ensured it would perform its design function. The failed valve was replaced on January 16, 2013, with a new valve with a stainless steel disk. Further corrective actions were planned to develop adequate preventive maintenance activities for this valve. The licensee entered this issue into their corrective action program as PER 671314. This finding was determined to be more than minor because it was associated with the Protection Against External Events (fires) attribute of the
Mitigating Systems cornerstone objective and adversely affected the cornerstone objective to ensure availability, reliability and capability of systems that respond to
initiating events to prevent undesirable consequences (i.e. core damage). Specifically, the 0-FCV-067-0048 valve failed and could not perform its isolation function credited in the
safe shutdown analysis. Because the finding could not be screened as very low safety significance (Green), nor its safety significance determined prior to issuing the inspection report, it is being characterized as To Be Determined (
TBD). The cause of this finding was directly related to the cross-cutting aspect of Appropriately Coordinating Work Activities in the Work Control component of the Human Performance area, because maintenance activities for 0-FCV-067-0048 were more reactive than preventive.
