05000302/FIN-2010004-02
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Finding | |
|---|---|
| Title | Inoperable Fire Barrier Penetration Seals |
| Description | The inspectors identified an NCV, with five examples, of Crystal River Unit 3 Operating License Condition 2.C (9), fire protection program. The NCV was associated with one inoperable fire penetration seal in the ceiling of the B train decay heat and building spray pump vault and four inoperable fire penetration seals associated with the main steam piping in the wall between the intermediate building and the turbine building. Once identified, the licensee initiated an hourly watch and entered the issue in the corrective action program as nuclear condition reports 369096, 406215, and 418755. The finding is more than minor because if left uncorrected, the fire seals could experience further degradation and potentially lead to a more significant safety concern. Using NRC IMC 0609, Appendix F, Fire Protection Significance Determination Process, the inspectors assessed the defense-in-depth (DID) element of each fire barrier degradation in the fire confinement category. One penetration was determined to have a low degradation rating and was determined to be of very low safety significance. The other four degraded penetrations were determined to have moderate degradation and were screened to be very low safety significance due to having non-degraded automatic full area water-based fire suppression system available in the exposing fire area. A contributing cause of the finding is related to the cross-cutting area of Problem Identification and Resolution with an evaluation aspect (P.1.(c)). Specifically, the licensee had the opportunity to evaluate the need to change the frequency of main steam line fire penetration inspections after finding degradation of main steam piping penetrations in 2007. |
| Site: | Crystal River  |
|---|---|
| Report | IR 05000302/2010004 Section 4OA5 |
| Date counted | Sep 30, 2010 (2010Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | D Rich E Crowe R Chou R Reyes T Morrissey |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
| ' | |
Finding - Crystal River - IR 05000302/2010004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Crystal River) @ 2010Q3
Self-Identified List (Crystal River)
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