05000293/FIN-2017007-02
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Finding | |
|---|---|
| Title | Inadequate Design Verification of Emergency Diesel Generator Under- Frequency Alarm Setpoint |
| Description | The team identified a finding of very low safety significance (Green) involving an NCV of 10 CFR Part 50, Appendix B, Criterion III, Design Control, in that Entergy did not adequately verify that the emergency diesel generator (EDG) under-frequency alarm setpoint was in accordance with design basis requirements. Specifically, the EDG under- frequency alarm was set at a value less than the prescribed industry standard to protect equipment, and station procedures did not contain instructions to address the EDG under- frequency condition. In response, Entergy staff evaluated and confirmed current EDG operability and initiated actions to correct the under-frequency range in the alarm setpoint and to provide appropriate operator response guidance in operating procedures. 3 This finding was more than minor because it was associated with the design control attribute of the Mitigating Systems cornerstone and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. In accordance with IMC 0609.04, Initial Characterization of Findings, and Exhibit 2 of IMC 0609, Appendix A, The SDP for Findings At-Power, the team determined that this finding was of very low safety significance (Green) because it was a design deficiency confirmed not to result in the loss of operability or functionality. The team determined that this finding had a cross-cutting aspect in the area of Human Performance, Avoid Complacency, because Entergy did not plan for the possibility of latent issues while processing a plant modification where the bases for EDG alarm functions were incorrect. |
| Site: | Pilgrim |
|---|---|
| Report | IR 05000293/2017007 Section 1R21 |
| Date counted | Sep 30, 2017 (2017Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21M |
| Inspectors (proximate) | S Pindale J Ayala N Floyd M Orr M Yeminy S Kobylarz M Gray |
| Violation of: | 10 CFR 50 Appendix B 10 CFR 50 Appendix B Criterion III, Design Control |
| CCA | H.12, Avoid Complacency |
| INPO aspect | QA.4 |
| ' | |
Finding - Pilgrim - IR 05000293/2017007 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Pilgrim) @ 2017Q3
Self-Identified List (Pilgrim)
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