05000482/FIN-2008004-02
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Finding | |
|---|---|
| Title | Use of hammer to reduce accumulator check valve leakage |
| Description | Inspectors identified a noncited violation of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, when Wolf Creek mechanically agitated the side of check Valve EP8818D such that the body of the valve was dented numerous times. This activity was performed under a troubleshooting work order to reduce valve seat leakage. The subsequent evaluation stated that this was an acceptable practice and that it would strengthen the surface metal of the valve body. Wolf Creek subsequently initiated Condition Report 2008-2284 to evaluate the practice. The inspectors determined that the failure to utilize work instructions appropriate to the circumstances and properly evaluate the effects was a performance deficiency. The inspectors determined that this issue is more than minor because it could become a more safety-significant concern if the cold working or peening practice is continued. Inspectors determined that the finding was not appropriate for evaluation under Inspection Manual Chapter 0609, Attachment 4. The inspectors applied Inspection Manual Chapter 0609, Appendix M, Significance Determination Process Using Qualitative Criteria. The inspectors used a bounding qualitative case, and in consultation with NRC management, determined that the operability of the valve was not impacted. Therefore, the finding was determined to be of very low safety significance. The inspectors determined that the finding has a problem identification and resolution crosscutting aspect in the area associated with the corrective action program because the licensee failed to evaluate the problem of seat leakage such that the resolution (a hammer) appropriately addressed the possible causes of valve seat leakage P.1(c) (Section 1R13). |
| Site: | Wolf Creek  |
|---|---|
| Report | IR 05000482/2008004 Section 1R13 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.13 |
| Inspectors (proximate) | R Deese D Dumbacher S Cochrum C Long P Alter J Groom W Schaup R Hickok |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Wolf Creek - IR 05000482/2008004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Wolf Creek) @ 2008Q3
Self-Identified List (Wolf Creek)
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