05000219/FIN-2011003-01
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Finding | |
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| Title | Failure to perform acceptance inspection of contractor work results in damage to safety related instrument cable |
| Description | The inspectors identified an NCV of 10 CFR Part 50, Appendix B, Criterion X, lnspection, when Exelon did not conduct a post maintenance inspection of work accomplished by a contractor on main steam isolation valve (MSIV), V-1-10, which resulted in heat damage to the valve position indication cabling causing a ground on the cable and the receipt of a half scram. Exelon\'s corrective actions included replacement of the damaged cable, performance of a work group evaluation and revising the main steam insulation work orders to include a caution to not install insulation on top of cabling. The finding was more than minor because it affected the design control attribute of the mitigating systems cornerstone of equipment performance to ensure the availability, reliability, and capability of a Class I cable. Additionally, this finding is similar to IMC 0612, Appendix E, Example 4.a, in that an evaluation required by procedures was not performed and resulted in a failure in the system. The inspectors evaluated the risk of this finding using IMC 0609, Significance Determination Process, attachment 4, Phase 1 - Initial Screening and Characterization of Findings. The inspectors determined that the finding was of very low safety significance (green) because it did not result in an actual loss of function of the MSIV or the reactor protection system. The inspectors determined that this performance deficiency did not involve a cross cutting aspect as it occurred 4 years earlier and is not indicative of current licensee performance. |
| Site: | Oyster Creek |
|---|---|
| Report | IR 05000219/2011003 Section 1R12 |
| Date counted | Jun 30, 2011 (2011Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | J Caruso J Kulp S Barr A Patel J Tomlinson R Bellamy J Ambrosini T Hedigan E Keighley C Cowdrey M Catts L Doerflein O Ayegbusi |
| INPO aspect | |
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Finding - Oyster Creek - IR 05000219/2011003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Oyster Creek) @ 2011Q2
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