05000293/FIN-2011002-02
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Finding | |
|---|---|
| Title | Inadequate Corrective Actions for RCIC Torus Suction Valve |
| Description | A self-revealing Green NCV of 10 CFR 50, Appendix B, Criterion XVl, Corrective Action, was identified for Entergy\'s failure to correct a condition adverse to quality. Entergy did not correct a Reactor Core lsolation Cooling (RCIC) torus suction valve which had failed to close during testing on October 4,2010. On January 5,2011, the same valve again failed to close during testing. Pilgrim\'s corrective actions included cleaning and replacing circuit breaker contacts and revising maintenance procedures to perform periodic resistance checks on motor control center circuit breaker cubicle secondary disconnects. Entergy has entered this issue into the corrective action program (CR-PNP-201 0-3486 and CR-PNP-2011-0046). The inspectors determined that the finding was more than minor because it was associated with the Equipment Performance attribute of the Mitigating Systems Cornerstone, and adversely affected the cornerstone\'s objective to ensure the reliability and availability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the RCIC torus suction valve failure to close affected the reliability of the RCIC system, and the RCIC system was made unavailable during system troubleshooting and repairs in January 2011. The inspectors determined the significance of the finding using IMC 0609.04, Phase 1 - Initial Screening and Characterization of Findings. The finding was determined to be of very low safety significance (Green) because the finding did not involve a design or qualification deficiency resulting in a loss of operability or functionality, did not result in a loss of system safety function of a single train for greater than its Technical Specification outage time, and did not screen as potentially risk significant due to external initiating events. The capability of RCIC to perform its function was not lost since the torus suction valve would have been able to be cycled open in the event RCIC needed to be aligned to the torus. This finding had a cross-cutting aspect in the Problem ldentification and Resolution cross-cutting area, Corrective Action Program component, because Entergy did not thoroughly evaluate the problem with the RCIC torus suction valve such that the resolution in October 2010 addressed the causes and corrected the problem. |
| Site: | Pilgrim |
|---|---|
| Report | IR 05000293/2011002 Section 1R19 |
| Date counted | Mar 31, 2011 (2011Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.19 |
| Inspectors (proximate) | D Jackson T Burns S Hansell J Tomlinson B Smith M Schneider K Dunham |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Pilgrim - IR 05000293/2011002 | |||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Pilgrim) @ 2011Q1
Self-Identified List (Pilgrim)
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