05000275/FIN-2014007-03
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Finding | |
|---|---|
| Title | Longstanding Uncompensated Nonconforming Condition |
| Description | The team identified a Green non-cited violation of 10 CFR Part 50 Appendix B Criterion XVI for the licensees failure to take timely corrective actions. In 2011, the licensee identified a potential path for gas intrusion into the containment spray system, contrary t
design basis requirements. The licensee took no interim or compensatory actions whil planning its final corrective actions. The licensee documented this condition in its corrective action program as SAPN 50657636. The failure to take timely corrective actions as required by 10 CFR 50 Appendix B Criterion XVI was a performance deficiency. This performance deficiency was more than minor because it was associated with the design control attribute of the mitigating systems cornerstone and it adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events. Using Inspection Manual Chapter 0609 Appendix A, the team determined that this finding was of very low safety significance (Green) because it did not result in the loss of operability or functionality of a system or train. This finding has a conservative bias cross-cutting aspect in the human performance cross-cutting area because licensee personnel failed to use decision-making practices that emphasized prudent choices over those that were simply allowable (H.14). Specifically, licensee managers failed to take timely action to address degraded conditions commensurate with their safety significance. |
| Site: | Diablo Canyon  |
|---|---|
| Report | IR 05000275/2014007 Section 4OA2 |
| Date counted | Sep 30, 2014 (2014Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | G Miller M Hayes M Keefe T Hipschman B Anderson C Alldredge E Ruesch |
| Violation of: | 10 CFR 50 Appendix B Criterion XVI |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
| ' | |
Finding - Diablo Canyon - IR 05000275/2014007 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Diablo Canyon) @ 2014Q3
Self-Identified List (Diablo Canyon)
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