05000424/FIN-2015002-01
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Finding | |
|---|---|
| Title | Failure to Identify and Correct Degraded Foreign Material Cover Plates for the NSCW Pump Wells |
| Description | An NRC-identified, non-cited violation (NCV) of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action, was identified for the licensees failure to identify and correct conditions adverse to quality associated with the cover plates for the nuclear service cooling water (NSCW) system pumps shaft well access openings. Specifically, the licensee failed to identify degraded conditions on the NSCW pump well cover plates (e.g. openings from uncovered holes and degraded periphery) that could result in foreign material (FM) entering the pumps well and impact cooling water flow to safety related heat exchangers. The licensee entered the issue into their corrective action program (CAP) under CR10033287, CR10085803 and CR10091171, installed temporary FM exclusion covers, and removed debris near the pump cover wells. 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 openings in the degraded pump well covers could allow FM to enter the NSCW system and adversely affect cooling water flow to essential component coolers. The finding was evaluated using the mitigating systems cornerstone column of Attachment 4 and Exhibit 2 of Appendix A to Inspection Manual Chapter 0609, Significance Determination Process, (SDP) dated April 29, 2015. The finding was of very low safety significance (i.e. Green) because the inspectors answered No to all of the screening questions in the exhibit. The inspectors determined the finding had a cross-cutting aspect of Evaluation in the Problem Identification and Resolution (PI&R) area because the organization did not thoroughly evaluate the NSCW debris-blocking event of the 1B safety injection (SI) lube oil (LO) cooler, in February 27, 2015, to ensure that resolutions addressed causes and extent of conditions commensurate with their safety significance (P.2). |
| Site: | Vogtle  |
|---|---|
| Report | IR 05000424/2015002 Section 1R12 |
| Date counted | Jun 30, 2015 (2015Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | A Alen M Cain S Sanchez S Sandal W Loo |
| Violation of: | 10 CFR 50 Appendix B Criterion XVI |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Vogtle - IR 05000424/2015002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Vogtle) @ 2015Q2
Self-Identified List (Vogtle)
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