05000338/FIN-2012004-01
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Finding | |
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| Title | Failure to Promptly Identify and Correct a Condition Adverse to Quality Involving Inadequate Tornado Missile Protection for a Pipe Penetration in the SWPH |
| Description | The inspectors identified a non-cited violation of 10CFR 50, Appendix B, Criterion XVI, Corrective Action , for the failure to promptly identify and correct a condition adverse to quality associated with inadequate tornado missile protection for a vent line penetration into the service water pump house (SWPH). The licensee initiated condition report CR479566, SWPH Tornado Missile Protection Vulnerability, installed a temporary missile shield, and initiated design change NA-12-00056 to implement long-term corrective action. The inspectors reviewed the issue of concern in accordance with IMC 0612, Appendix B, Issue Screening. The inspectors determined that the failure to identify and correct a condition adverse to quality associated with inadequate tornado missile protection for pipe penetrations into the SWPH was a performance deficiency (PD). The PD is more than minor, and therefore a finding, because it adversely affected the mitigating systems cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences, and the related attribute of protection against external events. . Specifically, a tornado could potentially affect the operation of one train of the safetyrelated SWPH ventilation system due to inadequate tornado missile protection for pipe penetrations. The inspectors evaluated the finding using IMC 0609, Appendix A, The Significance Determination Process for Findings At-Power, because the affected system, service water, supports long term heat removal. The inspectors determined that the finding was of very low safety significance, Green, because it did not represent an actual loss of function of one or more non-technical specification required trains of equipment designated as high safety-significant in accordance with the licensees maintenance rule program for greater than 24 hrs. In addition, this finding involved the cross-cutting area of problem identification and resolution, the component of the corrective action program, and the aspect of, evaluation of identified problems, P.1(c), because the licensee failed to identify inadequate tornado missile protection for a pipe penetration into the SWPH during multiple extent of condition evaluations. |
| Site: | North Anna  |
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| Report | IR 05000338/2012004 Section 1R01 |
| Date counted | Dec 31, 2012 (2012Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.01 |
| Inspectors (proximate) | G Mccoy R Clagg G Kolcum M Levine D Berkshire A Toth |
| INPO aspect | |
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Finding - North Anna - IR 05000338/2012004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (North Anna) @ 2012Q4
Self-Identified List (North Anna)
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