05000368/FIN-2015008-03
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Finding | |
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| Title | Inadequate Extent of Condition Review for Risk-Significant Condition |
| Description | The team identified a Green, non-cited violation of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action, that occurred because the licensees extent of condition performed in the root cause evaluation for the Yellow flooding finding failed to identify all potential water ingress paths into watertight rooms in the auxiliary building. The licensee identified additional examples of failures to construct the Unit 2 auxiliary building in accordance with the updated final safety analysis reports' description of internal and external flood barriers so that they could protect safety-related equipment from flooding. The team identified that the licensee had an opportunity to identify the unsealed conduit during a series of flooding reviews and walk-downs between 2012 and 2014, including an extent of condition review for unsealed conduits. Failure to identify and correct a condition adverse to quality as required by 10 CFR Part 50, Appendix B, Criterion XVI, and Procedure EN-LI-102 was a performance deficiency. This performance deficiency was more than minor because if left uncorrected, it could become a more significant safety concern. Specifically, the continued failure to identify all unsealed flooding penetrations could result in continued exposure of risk-significant equipment in the auxiliary building to flooding. This finding was associated with the Mitigating Systems cornerstone. Using Inspection Manual Chapter 0609, Appendix A, the team determined that the finding was of very low safety significance (Green) because it did not result in the loss of operability or functionality of any system or train and did not screen as risk-significant in response to external events. This finding has a human performance cross-cutting aspect associated with teamwork, in that the licensee failed to communicate and coordinate their activities within and across organization boundaries to ensure that nuclear safety was maintained (H.4). |
| Site: | Arkansas Nuclear  |
|---|---|
| Report | IR 05000368/2015008 Section 4OA2 |
| Date counted | Jun 30, 2015 (2015Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | C Young D Allen E Ruesch J Dixon N Hernandez P Jayroe B Tindell |
| Violation of: | 10 CFR 50 Appendix B Criterion XVI |
| CCA | H.4, Teamwork |
| INPO aspect | PA.3 |
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Finding - Arkansas Nuclear - IR 05000368/2015008 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Arkansas Nuclear) @ 2015Q2
Self-Identified List (Arkansas Nuclear)
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