05000338/FIN-2011003-01
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Finding | |
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| Title | Failure to Control Transient Fire Loads in a Safety-Related Area |
| Description | The inspectors identified a non-cited violation of the North Anna Power Station, Unit 1 Renewed Facility Operating License, NPF-4, Condition 2.D, Fire Protection, which involved a failure to comply with transient fire load procedure requirements that resulted in transient fire loads improperly located in a safetyrelated area, the Unit 1 motor driven auxiliary feedwater (MDAFW) room, contrary to transient fire load report requirements. The licensee entered the problem into their corrective action program as condition report 423054. The finding was more than minor because it impacted 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 factors such as fire. This finding had a credible impact on safety because the transient fire load exceeded the limit of Class B liquid transient loads. In accordance with NRC IMC 0609, Significant Determination Process, Appendix F, the inspectors performed a Phase 1 analysis and determined that the finding was of very low safety significance or Green because although the combustible controls program element was of high degradation due to oily rags in an unapproved container, the Unit 1 MDAFW room had a low fire frequency of 1E-6 and the duration of the violation was less than 3 days, which resulted in a screening check frequency of 1E-8 which was less than the screening criteria of 1E-6. The cause of this finding involved the cross-cutting area of human performance, the component of work practices, and the aspect of procedural compliance, H.4(b), because the licensee failed to follow procedural requirements for the control of transient fire loads in a safety-related area. |
| Site: | North Anna  |
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| Report | IR 05000338/2011003 Section 1R05 |
| Date counted | Jun 30, 2011 (2011Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | A Alen A Sengupta C Sanders D Mas G Mccoy J Reece R Carrion R Clagg S Sandal |
| CCA | H.8, Procedure Adherence |
| INPO aspect | WP.4 |
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Finding - North Anna - IR 05000338/2011003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (North Anna) @ 2011Q2
Self-Identified List (North Anna)
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