05000275/FIN-2014003-01
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Finding | |
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| Title | Failure to Follow Procedure Associated with Seismically Induced System Interactions |
| Description | The inspectors identified a Green non-cited violation of 10 CFR, Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, for the failure to properly identify and evaluate system interactions as required by the licensees Seismically-Induced Systems Interaction Program Procedure AD4.ID3, SISIP Housekeeping Activities. Specifically, the inspectors identified multiple instances of components or sources capable of producing a potential threat related to seismic induced structural interactions of safety related equipment or components. The licensee entered the finding into the corrective action program as Condition Report 50629355. The failure of plant personnel to follow procedure requirements to properly identify and evaluate for impact equipment near sensitive or safety-related equipment was a performance deficiency. This performance deficiency was more than minor and is therefore a finding because it was associated with the protection against external factors (seismic) attribute of the Mitigating Systems Cornerstone objective and adversely affected the objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences (i.e., core damage). Specifically, because Diablo Canyon staff did not fix or perform evaluations of seismic induced system interactions on safety-related or accident-mitigating systems, this had the potential to challenge the availability, reliability, and capability of various systems required to function following or during earthquakes to prevent undesirable consequence. Using Inspection Manual Chapter 0609, Attachment 04, Initial Characterization of Findings, and Appendix A, Exhibit 2, Mitigating System Screening Questions, the finding was determined to be of very low safety significance (Green) because the finding was associated with seismic design or qualification of systems, structures, and components but did not result in the loss of a system operability or functionality. The inspectors determined this finding has a problem identification and resolution cross-cutting aspect associated with the Identification attribute; specifically in that PG&E personnel failed to implement the Seismically-Induced Systems Interaction Program with a low enough threshold for identifying and assessing seismic induced system interactions in accordance with the program and procedures [P.1]. (Section 1R04) |
| Site: | Diablo Canyon  |
|---|---|
| Report | IR 05000275/2014003 Section 1R04 |
| Date counted | Jun 30, 2014 (2014Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.04 |
| Inspectors (proximate) | G Guerra G Pick J Buchanan J Reynoso J Watkins P Elkman R Latta T Hipschman W Sifre W Walker |
| Violation of: | 10 CFR 50 Appendix B Criterion V |
| CCA | P.1, Identification |
| INPO aspect | PI.1 |
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Finding - Diablo Canyon - IR 05000275/2014003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Diablo Canyon) @ 2014Q2
Self-Identified List (Diablo Canyon)
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