05000271/FIN-2012004-01
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Incorrect Assessment of Equipment Condition Resulted in Single Recirculating LOOP Operation |
| Description | A self-revealing, Green finding (FIN) was identified because Entergy failed to implement a preventive maintenance procedure. Specifically, Entergy personnel classified the discovery status code for the minor motor inspection on the A recirculation pump motor generator set drive motor incorrectly, as B satisfactory or normal wear, instead of D abnormal wear, which resulted in a missed opportunity to replace degraded components that caused the A recirculation pump to trip and an unplanned entry into single recirculation loop operation. Entergys corrective actions included cleaning the motor and the junction box, replacing components that had been damaged by an arc flash, and testing the circuit to verify no other components were degraded prior to restarting the motor. In addition, Entergy initiated condition report CR-VTY-2012-02811 and issued a corrective action to reinforce the requirements of Entergy Procedure EN-DC-324 among maintenance staff. Entergy also plans to add all large motor and generator junction boxes to the predictive maintenance program and to perform thermography on a six month frequency. The inspectors determined that the issue was more than minor because it resulted in a transient, i.e. an event that upset plant stability (an unplanned entry into single recirculation loop operation). In particular, the issue is associated with the Equipment Performance attribute of the Initiating Events cornerstone and affected the cornerstone objective to limit the likelihood of events that upset plant stability during power operations. The inspectors determined the significance of the finding using IMC 0609, Appendix A, The Significance Determination Process for Findings At-Power. The finding was determined to be of very low safety significance (Green) because the finding was a transient initiator that did not cause a reactor trip. The inspectors determined that the finding had a cross-cutting aspect in the Human Performance cross-cutting area, Work Practices component, because Entergy did not sufficiently define and effectively communicate expectations regarding procedural compliance for the selecting of the discovery status code and personnel did not follow procedures. |
| Site: | Vermont Yankee  |
|---|---|
| Report | IR 05000271/2012004 Section 1R12 |
| Date counted | Sep 30, 2012 (2012Q3) |
| Type: | Finding: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | T Fish T Burns R Bellamy C Crisden S Rich J Deboer B Dionne K Mangan S Rutenkroger |
| CCA | H.8, Procedure Adherence |
| INPO aspect | WP.4 |
| ' | |
Finding - Vermont Yankee - IR 05000271/2012004 | |||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Vermont Yankee) @ 2012Q3
| |||||||||||||||||||||||||||||||||||||||||