05000461/FIN-2011005-01
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Finding | |
|---|---|
| Title | Failure to Properly Apply an Approved ASME Code Case |
| Description | The inspectors identified a finding of very low safety significance with an associated non-cited violation of 10 CFR 50.55a due to the licensees failure to adequately apply American Society of Mechanical EngineersSection XI Code Case N-513-3 when the licensee evaluated a degraded section of safety-related shutdown service water system piping for operability. Specifically, the licensee failed to perform required daily walkdowns to confirm the analysis of conditions used in the licensees operability evaluation remained valid. After this issue was identified by the inspectors, the licensee promptly resumed the daily compensatory action to verify the leak rate until the piping system was repaired. The finding was of more than minor significance because it was associated with the Protection Against External Factors attribute of the Mitigating Systems Cornerstone, and it directly affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Additionally, if left uncorrected, improper application of an approved code case would become a more significant safety concern in that it could result in the failure to identify inoperable safety-related piping. The finding was a licensee performance deficiency of very low safety significance because it did not result in an actual loss of safety function of a single train for greater than its Technical Specification allowed outage time. The inspectors concluded that there was no specific performance characteristic that was a significant cause of the performance deficiency in this instance; therefore, no cross-cutting aspect was identified. |
| Site: | Clinton  |
|---|---|
| Report | IR 05000461/2011005 Section 1R15 |
| Date counted | Dec 31, 2011 (2011Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | B Kemker D Lords J Cassidy J Draper J Mcghee M Bielby M Ring R Jickling S Mischke T Bilik |
| INPO aspect | |
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Finding - Clinton - IR 05000461/2011005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Clinton) @ 2011Q4
Self-Identified List (Clinton)
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