05000247/FIN-2012004-04
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Finding | |
|---|---|
| Title | Inadequate Operability Evaluation of 22 Static Inverter with a Degraded Frequency Meter |
| Description | The inspectors identified a Green NCV of 10 CFR 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, because Entergy staff did not adequately implement procedure EN-OP-104 Operability Determination Process, section 5.1, to assess the operability of the 22 static inverter due to a degraded frequency meter on September 7, 2012. Specifically, Entergy personnel did not adequately evaluate the impact of the degraded meter on the operability of the static inverter. This condition caused the inverter to be inoperable. As a result of inspector questions, Entergy staff immediately declared the static inverter inoperable and replaced the frequency meter. Entergy staff entered this issue into the CAP as CR-IP2-2012-5620. This finding is more than minor because it is associated with the equipment performance attribute of the Mitigating Systems cornerstone and affected the cornerstone objective to ensure the availability and reliability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the degraded frequency meter resulted in the static inverter being declared inoperable on September 10, 2012 to replace the frequency meter. Using IMC 0609, Appendix A, The Significance Determination Process for Findings At-Power, the inspectors determined this finding was of very low safety significance (Green) because it was not a design or qualification deficiency, did not represent a loss of system safety function, and did not screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event. The finding had a cross-cutting aspect in the area of human performance with the Decision Making attribute because Entergy personnel did not make safety-significant decisions using a systematic process, especially when faced with uncertain or unexpected plant conditions, to ensure safety is maintained. Specifically, Entergy did not obtain interdisciplinary input and reviews in resolving degraded 22 static inverter frequency meter. |
| Site: | Indian Point  |
|---|---|
| Report | IR 05000247/2012004 Section 1R15 |
| Date counted | Sep 30, 2012 (2012Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | C Crisden H Gray J Furia L Scholl M Gray O Ayegbusi R Montgomery S Mccarver T O'Hara |
| CCA | H.13, Consistent Process |
| INPO aspect | DM.1 |
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Finding - Indian Point - IR 05000247/2012004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Indian Point) @ 2012Q3
Self-Identified List (Indian Point)
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