05000282/FIN-2013004-04
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Finding | |
|---|---|
| Title | Inappropriate Removal of Diesel Lube Oil Valve Mounting Causes Vibration and Fretting |
| Description | An inspector identified finding of very low safety significance (Green) and an NCV of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, was identified on August 26, 2013, due to the licensees failure to follow Procedure FP-E-EQV-01, Equivalency Evaluations and Changes. Specifically, the licensee failed to evaluate the operational vibration and establish that the removal of a valve mounting as part of Engineering Change 17270 did not adversely change the design function of the D2 EDG lube oil pressure boundary. The licensees planned long-term corrective actions included replacing the copper tubing lines and restoring the mounting of the valves. The finding was determined to be more than minor because if left uncorrected, the issue had the potential to lead to a more significant safety concern. Specifically, continued vibrational contact between the oil filter housing and the brass fitting had the potential cause failure of the brass fitting or copper tubing and a loss of the lube oil pressure boundary. The inspectors determined the finding was of very low safety significance because question #1 provided in IMC 0609, Appendix A, Exhibit 2, Mitigating Screening Questions, was answered yes. This finding was cross-cutting in the Human Performance, Work Practices area because the licensee did not ensure supervisory and management oversight of work activities such that nuclear safety is supported (H.4(c)). |
| Site: | Prairie Island  |
|---|---|
| Report | IR 05000282/2013004 Section 1R19 |
| Date counted | Sep 30, 2013 (2013Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.19 |
| Inspectors (proximate) | K Riemer D Szwarc B Palagi M Phalen R Baker K Stoedter M Speck K Barclay P Laflamme E Sanchez-Santiago J Beavers M Ziolkowski T Daun |
| Violation of: | 10 CFR 50 Appendix B Criterion V |
| CCA | H.2, Field Presence |
| INPO aspect | LA.2 |
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Finding - Prairie Island - IR 05000282/2013004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Prairie Island) @ 2013Q3
Self-Identified List (Prairie Island)
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