05000333/FIN-2012005-02
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Failure of A EDG Output Breaker to Close Following Loss of Offsite Power |
| Description | The inspectors identified a self-revealing, Green non-cited violation (NCV) of Technical Specification (TS) 5.4, Procedures, because Entergy did not establish and implement an adequate procedure for installation of a 4160 volt alternating current (VAC) circuit breaker. Specifically, FitzPatricks procedure for 4160 VAC circuit breaker installation did not provide sufficient guidance to station personnel to preclude physical misalignment of the A emergency diesel generator (EDG) output breaker which occurred during installation on September 15, 2011, and resulted in failure of the breaker to close when required following a loss of offsite power on October 5, 2012. As immediate corrective action, the A EDG output breaker was racked out, re-aligned in the cubicle, and racked back in such that it was no longer misaligned and was flush with the front of the cubicle. An instrumented test of the A and C EDGs was performed and all breakers operated correctly. The issue was entered into the corrective action program (CAP) as condition report (CR)-JAF-2012-06868. The finding was more than minor because it affected the equipment performance attribute of the Mitigating Systems cornerstone objective to ensure the reliability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the reliability of Division 1 EDG automatic operation was degraded for approximately one year due to the A EDG breaker misalignment issue. Although the issue was identified while the plant was shut down, the inspectors determined that it was appropriate to evaluate the condition in accordance with the at-power SDP because the condition existed for the previous year. In accordance with Inspection Manual Chapter (IMC) 0609, Appendix A, The Significance Determination Process (SDP) for Findings At-Power, the inspectors determined that the finding was of very low safety significance because the finding was not a design qualification deficiency resulting in a loss of functionality or operability, did not represent an actual loss of safety function of a system or train of equipment, and was not potentially risk significant due to external initiating events. Specifically, the A EDG breaker continued to perform its safety function as evidenced by monthly surveillance tests until the misalignment condition ultimately impacted its ability to close subsequent to October 3, 2012 testing. The finding had a cross-cutting aspect in the area of Human Performance, Resources, because FitzPatrick personnel did not ensure that a complete, accurate and up-to-date procedure was available for 4160 VAC circuit breaker installation. Specifically, procedure did not include steps to ensure correct alignment during breaker racking and to verify flush alignment. |
| Site: | FitzPatrick  |
|---|---|
| Report | IR 05000333/2012005 Section 4OA3 |
| Date counted | Dec 31, 2012 (2012Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | B Sienel A Burritt R Rolph G Meyer R Barkley S Mccarver E Knutson B Bickett |
| CCA | H.7, Documentation |
| INPO aspect | WP.3 |
| ' | |
Finding - FitzPatrick - IR 05000333/2012005 | ||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (FitzPatrick) @ 2012Q4
Self-Identified List (FitzPatrick)
| ||||||||||||||||||||||||||||||||||||||||||||||||||