05000397/FIN-2008004-04
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Finding | |
|---|---|
| Title | Failure to ensure that Division 2 instrument sensing lines remained free of fire damage. |
| Description | The inspectors identified a noncited violation of License Condition 2.C.(14) for failure to protect one train of post-fire safe shutdown equipment as required by 10 CFR Part 50, Appendix R, Section III.G. Specifically, the licensee failed to ensure that the Division 2 instrument sensing lines related to residual heat removal flow indication, minimum recirculation valve control, and reactor pressure vessel level and pressure indication remained free of fire damage. The inspectors determined that a fire in Fire Area R-1 could affect the function of the instrument sensing lines needed to achieve and maintain a safe shutdown condition. The licensee entered this deficiency into the corrective action program as Condition Reports 2-06-02399 and 2-06-04898. Failure to ensure that the credited instrument sensing lines would remain free of fire damage was a performance deficiency. The inspectors determined this deficiency was more than minor in that it had the potential to affect the mitigating systems cornerstone objective to ensure the availability, reliability, and capability of systems that respond to external events (fire). Because procedures provided adequate guidance to operators in the event of the expected failure modes, the inspectors assigned this post-fire safe shutdown finding a low degradation rating. In accordance with Manual Chapter 0609, Appendix F, \"Fire Protection Significance Determination Process,\" Phase 1, Step 1.3; this finding was determined to have very low safety significance. (Section 4OA5.2) |
| Site: | Columbia  |
|---|---|
| Report | IR 05000397/2008004 Section 4OA5 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | P Elkmann G Pick R Cohen Z Dunham D Stearns T Mckernon H Abuseini |
| INPO aspect | |
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Finding - Columbia - IR 05000397/2008004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Columbia) @ 2008Q3
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