05000336/FIN-2012010-01
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Finding | |
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| Title | Failure to Take Timely Corrective Actions to Restore Degraded Unit 3 Main Feedwater Isolation Valves |
| Description | The inspectors identified a Green NCV of 10 CFR 50, Appendix B, Criteria XVI, Corrective Action, for Dominions failure to take timely corrective actions for conditions adverse to quality involving the degradation of the closing capability of four Unit 3 main feedwater isolation valves. Dominion has deferred correcting this condition adverse to quality for over a period of six years (three refueling outages), and correction of the degraded condition is currently scheduled for the next refueling outage (April 2013). The inspectors determined this issue was more than minor because it is similar to the more than minor examples, 4.f and 4.g of NRC IMC 0612, Appendix E, Examples of Minor Issues. Additionally, the finding is more than minor because it is associated with the Design Control attribute of the Barrier Integrity cornerstone, and adversely affected the cornerstones objective of providing reasonable assurance that physical design barriers (fuel cladding, reactor coolant system, and containment) protect the public from radionuclide releases caused by accidents or events. The inspectors determined the finding was of very low safety significance (Green) because the issue did not represent an actual open pathway in the physical integrity of the reactor containment. The inspectors determined this finding had a cross-cutting aspect in the Human Performance cross-cutting area, Decision Making component, because Dominion did not use conservative assumptions in decision making when delaying the repairs. |
| Site: | Millstone  |
|---|---|
| Report | IR 05000336/2012010 Section 4OA2 |
| Date counted | Sep 30, 2012 (2012Q3) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | B Haagensen T Setzer R Bellamy S Ibarrola E Miller |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Millstone - IR 05000336/2012010 | ||||||||||||||||||||||||||||||||||||||||||
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Finding List (Millstone) @ 2012Q3
Self-Identified List (Millstone)
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