05000219/FIN-2013004-01
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Finding | |
|---|---|
| Title | Physical Change To Security Feature Causes Flood Control Feature To Be Ineffective |
| Description | The inspectors identified a Green, non-cited violation (NCV) of 10 CFR 50, Appendix B, Criterion III, Design Control, in that, Exelon did not ensure applicable regulatory requirements and design basis for the emergency diesel generators were correctly translated into instructions. Specifically, the inspectors determined that Exelon did not ensure that the design basis for flood control features was maintained and correctly translated into specifications, drawings, procedures and instructions for the installation of a security wall modification around the emergency diesel generator building which affected the probable maximum precipitation flood protection features of the building. Exelon entered this issue into the corrective action program for resolution as IR 1546148 and implemented corrective actions which included removing soil and re-grading the area adjacent to the building to improve the storm water runoff flow patterns. The performance deficiency was more than minor because the finding affected the protection against external factors attribute of the mitigating systems cornerstone objective of ensuring the availability, reliability and capability of systems that respond to initiating events to prevent undesirable consequences. The inspectors determined this finding involved the loss or degradation of equipment or function specifically designed to mitigate a seismic, flooding or severe weather initiating event; however, it did not involve the assumption that the protected equipment or safety function was completely failed or unavailable, and did not involve the total loss of any safety function, identified by Exelon through a PRA, IPEEE or similar analysis that contributes to external event initiated core damage accident sequences. Therefore, the inspectors determined the finding to be of very low safety significance (Green). This finding has a cross-cutting aspect in the area of Problem Identification and Resolution, because Exelon, beginning in 2009 and as recent as September 2012, did not thoroughly evaluate the problem such that the resolution addressed the cause of an issue that potentially impacted nuclear safety. |
| Site: | Oyster Creek |
|---|---|
| Report | IR 05000219/2013004 Section 1R01 |
| Date counted | Sep 30, 2013 (2013Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.01 |
| Inspectors (proximate) | G Hunegs J Kulp A Patel J Laughlin E Burkett B Dionne J Demarshall |
| Violation of: | 10 CFR 50 Appendix B Criterion III, Design Control |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Oyster Creek - IR 05000219/2013004 | ||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Oyster Creek) @ 2013Q3
Self-Identified List (Oyster Creek)
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