05000259/FIN-2014004-01
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Finding | |
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| Title | Failure to maintain Fire Doors in their Rated Configuration |
| Description | The NRC identified a Green non-cited violation (NCV) of Browns Ferry Operating License Conditions 2.C for the licensees failure to maintain fire doors in their rated configuration required by the Fire Protection Report. Specifically, the licensee failed to ensure that fire doors 497, 501, and 506, for Units 1, 2, and 3 respectively, were latched closed as required for the doors to meet their designed fire rating. The licensee entered this issue in the CAP as PER 921571 and initiated corrective actions to replace the degraded fire doors. The inspectors determined that the licensees failure to maintain fire doors 501, 506 and 497 in their rated configuration as required by the Browns Ferry Nuclear Plant Fire Protection Report was a performance deficiency. The finding was more than minor because it was associated with the protection against external factors (fires) attribute of the mitigating systems cornerstone and affected the objective to maintain the reliability and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, failure to ensure fire doors were closed and latched could have resulted in the door opening during a fire, thereby allowing a fire to affect additional equipment important to safety in the exposed fire zone. The finding was screened in accordance with IMC 0609, Appendix F, Fire Protection Significance Determination Process (SDP), issued September 20, 2013. The inspectors conducted a Phase I SDP screening utilizing Figure F.1 in Appendix F. Per the Phase I screening criteria, the finding was assigned the category of Fire Confinement. The inspectors assigned a Moderate Degradation Rating to the fire barrier door in accordance with Attachment 2 of Appendix F, because the latching mechanism for the door was non-functional. In accordance with Appendix F, Supplemental Screening for Fire Confinement Findings, task 1.4.2, this finding screened as very low safety significance (Green) because the there was a fully functional automatic suppression system on either side of the fire barrier. The cause of this finding was directly related to the aspect of trending in the problem identification and resolution cross-cutting area. Specifically, over the past several years the licensee documented multiple examples of fire doors failing to consistently latch, in the CAP. The licensee failed to analyze this information in the aggregate to identify and correct the issue (P.4). |
| Site: | Browns Ferry  |
|---|---|
| Report | IR 05000259/2014004 Section 1R05 |
| Date counted | Sep 30, 2014 (2014Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | A Goldau A Ruh C Scott D Dumbacher G Smith J Bartley L Pressley M Peck R Baldwin T Stephen |
| Violation of: | License Condition - Fire Protection License Condition |
| CCA | P.4, Trending |
| INPO aspect | PI.4 |
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Finding - Browns Ferry - IR 05000259/2014004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Browns Ferry) @ 2014Q3
Self-Identified List (Browns Ferry)
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