05000482/FIN-2009002-02
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Finding | |
|---|---|
| Title | Degraded fire barrier for auxiliary feedwater |
| Description | The inspectors identified a noncited violation of License Condition 2.C(5)(a) for a degraded fire seal that separated redundant safe shutdown equipment. Specifically, a silicone foam seal and ceramic fiber board separating redundant motor-driven auxiliary feedwater trains was degraded so that it no longer provided a 3-hour rated fire barrier. The licensee entered the finding into their corrective action program as Condition Report 2009-001087. The finding was more than minor because it was similar to example 2.e. of NRC Inspection Manual Chapter 0612, Appendix E, Examples of Minor Issues, in that, the performance deficiency impacted the ability of the seal to perform its function. In addition, the performance deficiency was associated with the Mitigating Systems cornerstone attribute of Protection Against External Events, and affected the cornerstone objective to ensure the reliability of systems that respond to Initiating Events to prevent undesirable consequences. Under NRC Inspection Manual Chapter 0609, Appendix F, Attachment 2, Degradation Rating Guidance Specific to Various Fire Protection Program Elements the finding was associated with a Moderate B degradation due to the seal not being in a tested or evaluated condition. Using Appendix F, Supplemental Screening for Fire Confinement Findings, the finding screens as Green due to exposing fire Area A33 featuring an automatic full area water-based suppression system. The inspectors determined that this finding has a crosscutting aspect in the area of problem identification and resolution associated with the corrective action program component because Wolf Creek failed to identify the degraded seal and missing ceramic board during previous post waterhammer walkdowns P.1.a] (Section 1R05) |
| Site: | Wolf Creek  |
|---|---|
| Report | IR 05000482/2009002 Section 1R05 |
| Date counted | Mar 31, 2009 (2009Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.05 |
| Inspectors (proximate) | B Tindell C Long M Hayes P Elkmann P Jayroe V Gaddy |
| CCA | P.1, Identification |
| INPO aspect | PI.1 |
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Finding - Wolf Creek - IR 05000482/2009002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Wolf Creek) @ 2009Q1
Self-Identified List (Wolf Creek)
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