05000482/FIN-2008003-07
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Finding | |
|---|---|
| Title | Inadequate Transformer Procedure Resulted in an Unplanned Reactor Trip and Forced Outage |
| Description | A self-revealing finding was identified for an inadequate maintenance procedure that resulted in operators manually tripping the plant due a loss of all condensate pumps. In order to support planned maintenance for a different service transformer, the licensee aligned power to all three condensate pumps from Service Transformer PB003. Because the work order used to perform work on Service Transformer PB003 two weeks earlier was inadequate, two phases of the bus cables were installed using the incorrect configuration and subsequently failed, causing the transformer and condensate pumps to trip. The licensee entered this issue into their corrective action program as Condition Report 20080908. The finding was more than minor because it is associated with the procedure quality attribute of the initiating events cornerstone and it affected the cornerstone objective to limit the likelihood of those events that upset plant stability. This finding also affected the mitigating systems cornerstone and the inspectors evaluated the significance of this finding using a Phase 2 analysis. Further assessment using a Phase 3 analysis by a senior reactor analyst determined the finding to be of very low safety significance. The performance deficiency was analyzed as a reactor trip with a loss of normal feedwater with a 13 day exposure time. This finding has human performance crosscutting aspects in the area associated with resources component because the licensee failed to provide a complete and thorough maintenance procedure to assure nuclear safety H.2(c) |
| Site: | Wolf Creek  |
|---|---|
| Report | IR 05000482/2008003 Section 4OA5 |
| Date counted | Jun 30, 2008 (2008Q2) |
| Type: | Finding: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | |
| Inspectors (proximate) | K Clayton P Elkmann L Ellershaw S Cochrum C Long V Gaddy |
| CCA | H.7, Documentation |
| INPO aspect | WP.3 |
| ' | |
Finding - Wolf Creek - IR 05000482/2008003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Wolf Creek) @ 2008Q2
Self-Identified List (Wolf Creek)
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