05000333/FIN-2009003-04
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Finding | |
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Title | Failure Regarding an Adverse EDG Rotor Insulation Performance Trend |
Description | A self-revealing NCV of very low safety significance of 10 CFR 50, Criterion XVI, Corrective Action, was identified because Entergy personnel did not identify and correct a condition adverse to quality related to the emergency diesel generator (EDG) system. Specifically, Entergy personnel did not properly identify and implement adequate actions required by their system monitoring program in response to a degraded generator rotor on the C EDG revealed by an adverse performance trend with respect to the insulation resistance and polarization index. Entergy staff initiated CR-JAF-2009-01847 to determine the root causes and recommend further corrective actions. Entergys corrective actions included rewinding of the affected pole of the C EDG rotor. This finding is greater 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 of systems that respond to initiating events to prevent undesirable consequences (i.e., core damage). Specifically, Entergy personnel did not identify an adverse performance trend which resulted in an unplanned extension of the maintenance period for the C EDG, extending the unavailable period from May 28 through June 11, 2009. The inspectors evaluated the significance of this finding using IMC 0609.04, Phase 1 Initial Screening and Characterization of Findings. The inspectors determined the finding was of very low safety significance (Green) because the finding was not a qualification or design deficiency, did not represent a loss of a safety function, and did not screen as potentially risk significant due to external initiating events. The inspectors determined that this finding had a cross-cutting aspect in the area of problem identification and resolution because Entergy personnel did not implement a corrective action program with a low threshold for identifying issues in that the adverse trend in the C EDG rotor insulation was not identified. (P.1(a)) |
Site: | FitzPatrick |
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Report | IR 05000333/2009003 Section 1R22 |
Date counted | Jun 30, 2009 (2009Q2) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | Self-revealing |
Inspection Procedure: | IP 71111.22 |
Inspectors (proximate) | M Patel S Rutenkroger J Noggle G Hunegs M Gray A Rosebrook J Commiskey J Heinly |
CCA | P.1, Identification |
INPO aspect | PI.1 |
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Finding - FitzPatrick - IR 05000333/2009003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (FitzPatrick) @ 2009Q2
Self-Identified List (FitzPatrick)
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