05000327/FIN-2013005-01
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Finding | |
|---|---|
| Title | Unit 1 Train A RHR Containment Suction Valve Failure |
| Description | A self-revealing non-cited violation of 10 CFR 50 Appendix B, Criterion XVI, Corrective Action, was identified for the licensees failure to promptly correct a condition adverse to quality within a reasonable time. Timely corrective actions were not taken to correct a dual position indication (open and closed lights both illuminated) on the Unit 1 A train residual heat removal (RHR) containment sump suction flow control valve (FCV) 1-FCV-63-72. This licensee entered this issue into the corrective action program as problem evaluation report (PER) 772193 and performed repairs to the valve to restore the system to operable status. This finding was determined to be more than minor because it was associated with the Design Control attribute of the Mitigating Systems cornerstone and adversely affected the cornerstones objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences (i.e., core damage). Specifically, the finding reduced the reliability and capability of the A train RHR system to perform its safety function as designed. The finding required a detailed risk analysis as the A RHR system was inoperable beyond its allowed outage time of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. The detailed risk analysis concluded that the finding was of very low safety significance (Green). This finding was determined to have a cross-cutting aspect relating to the proper classification, prioritization, and evaluation of operability and reportability of conditions adverse to quality in the Corrective Action component of the Problem Identification and Resolution area. |
| Site: | Sequoyah  |
|---|---|
| Report | IR 05000327/2013005 Section 4OA5 |
| Date counted | Dec 31, 2013 (2013Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | |
| Inspectors (proximate) | G Smith L Lake M Speck R Hamilton R Kellner W Deschaineg Smithj Bartley L Lake M Speck R Hamilton R Kellner W Deschaine |
| Violation of: | 10 CFR 50 Appendix B Criterion XVI |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Sequoyah - IR 05000327/2013005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Sequoyah) @ 2013Q4
Self-Identified List (Sequoyah)
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