05000390/FIN-2011004-04
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Finding | |
|---|---|
| Title | Inadequate Corrective Actions involving the Failure of a Shutdown Board to Transfer |
| Description | The inspectors identified an NCV of 10 CFR 50, Appendix B, Criterion XVI, Corrective Action, for the licensees repeat occurrence of a level A problem evaluation report (PER) 176604 written July 17, 2009. The licensees failure to ensure that all corrective actions for A level PER 176604 were complete is a performance deficiency. The inspectors reviewed IMC 0612 and determined that the finding was more than minor because, if left uncorrected, it would have the potential to lead to a more significant safety concern; specifically, the subject safety-related breaker could have been installed in a more critical application or have been installed for a longer period of time, up to 18 months, in the alternate feeder application. Additionally, the finding was associated with the configuration control attribute of the Initiating Events cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. Using the Phase I screening worksheet of IMC 0609, the inspectors determined that the finding was of very low safety significance (Green) because it would not contribute to both a reactor trip and the likelihood that mitigation equipment or functions would not be available. The cause of the finding was directly related to the cross-cutting aspect for appropriate corrective actions to address safety issues in a timely manner commensurate with their safety significance and complexity in the Corrective Action Program component of the cross-cutting area of Problem Identification and Resolution, in that the licensee failed to take adequate corrective actions to prevent repetition of the fast transfer switch mal-adjustment. Specifically, effective corrective actions to preclude repetition were not implemented but signed as completed when the 1A shutdown board alternate feeder breaker was placed in service. (P.1(d)) (See Section 4OA2) |
| Site: | Watts Bar  |
|---|---|
| Report | IR 05000390/2011004 Section 4OA2 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | R Monk S Shaeffer K Miller |
| CCA | P.3, Resolution |
| INPO aspect | PI.3 |
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Finding - Watts Bar - IR 05000390/2011004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Watts Bar) @ 2011Q3
Self-Identified List (Watts Bar)
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