05000271/FIN-2012002-02
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Finding | |
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| Title | Failure to the D Service Water Pump Due to LOW Oil and Inadequate Corrective Actions |
| Description | A self-revealing, Green, NCV of 10 CFR 50 Appendix B, Criterion XVI, Corrective Action, was identified because Entergy personnel did not promptly correct an adverse condition resulting in the unplanned unavailability of the D service water pump. Specifically, Entergy personnel did not maintain a clear oil sight glass and did not identify a low oil level for the upper motor bearing prior to damage to the bearing. Entergys corrective actions included initiating CR-VTY-2012-00483, performing an apparent cause evaluation (ACE), and replacing the motor and sight glass. Entergy staff completed the D service water pump work and restored it to service. The inspectors determined that the issue was 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 (i.e. core damage). Specifically, the D service water pump failed in service affecting overall safety system redundancy and reliability, and resulted in three days of unplanned unavailability. The inspectors determined the significance of the finding using IMC 0609.04, Phase 1 Initial Screening and Characterization of Findings. The finding was determined to be of very low safety significance (Green) because it did not represent a loss of system safety function, a loss of safety function of a single train for greater than its TS allowed outage time, 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 Problem Identification and Resolution cross-cutting area, Corrective Action Program component, because Entergy personnel did not implement a corrective action program with a low threshold for identifying issues and as a result, the stained sight glass was not recognized as an adverse condition |
| Site: | Vermont Yankee  |
|---|---|
| Report | IR 05000271/2012002 Section 1R19 |
| Date counted | Mar 31, 2012 (2012Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.19 |
| Inspectors (proximate) | S Rutenkroger R Bellamy E Burket S Rich E Keighley K Dunham |
| CCA | P.1, Identification |
| INPO aspect | PI.1 |
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Finding - Vermont Yankee - IR 05000271/2012002 | |||||||||||||||||||||||||
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Finding List (Vermont Yankee) @ 2012Q1
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