05000336/FIN-2010004-03
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Finding | |
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| Title | Failure to Implement Timely Corrective Actions for a Degraded Unit 2 FRV Results in Manual Reactor Trip |
| Description | A self-revealing finding of very low safety significance (Green) was identified for Dominion\'s failure to implement timely corrective actions for a degraded Unit 2 feedwater regulating valve (FRV) in accordance with procedure PI-AA-200, Corrective Action. Specifically, two weeks after the issue was first identified, the #2 FRV further degraded causing Dominion to trip the reactor when the #2 steam generator (SG) level could not be adequately controlled. Dominion subsequently repaired the FRV and returned the plant to 100 percent power. The inspectors determined that Dominion\'s failure to implement timely corrective actions for a degraded #2 FRV in accordance with procedure PI-AA-200, Corrective Action, was a performance deficiency. This finding is more than minor because it was similar to NRC Inspection Manual Chapter 0612, Appendix E, Examples of Minor Issues, Example 4f, in that the failure to correct a condition adverse to quality led to a reactor trip. The finding was associated with the equipment performance attribute of the Initiating Events cornerstone and affected the cornerstone objective of limiting the likelihood of those events that upset plant stability and challenge critical safety functions during power operations. Specifically, Dominion\'s failure to implement timely corrective actions for the #2 FRV caused the operators to manually trip the reactor when the #2 SG level could not be controlled. The inspectors determined that this finding had a cross-cutting aspect in the Problem Identification and Resolution cross-cutting area, Corrective Action Program component, because Dominion did not take appropriate corrective action to address the degraded #2 FRV in a timely manner, commensurate with its safety significance. P.1(d). |
| Site: | Millstone  |
|---|---|
| Report | IR 05000336/2010004 Section 4OA3 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | Finding: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | T Moslak D Jackson B Haagensen J Krafty S Shaffer M Balazik L Kauffman K Modes |
| CCA | P.3, Resolution |
| INPO aspect | PI.3 |
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Finding - Millstone - IR 05000336/2010004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Millstone) @ 2010Q3
Self-Identified List (Millstone)
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