05000219/FIN-2009003-09
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | 10 CFR 50, Appx B Criterion V, Instructions, Procedures, & Drawings, states in part, that activities affecting quality shall be prescribed by documented instructions or procedures of a type appropriate to the circumstance; and instructions or procedures shall include appropriate quantitative or qualitative acceptance criteria to determine that important activities have been satisfactorily accomplished. Contrary to this, Exelon did not have appropriate work instructions to identify a degraded condition on the #2 EDG battery charger in November 2007, during a maintenance activity which involved inspection and cleaning of the battery charger. Specifically, the work instruction did not contain specific guidance or acceptance criteria to look for connections with signs of weakening (frayed wires) or heat damage as described in Exelons performance center maintenance (PCM) guidance for battery chargers. The degraded condition went unnoticed until operations personnel identified a degraded voltage condition on the battery charger on March 23, during routine rounds. Additional troubleshooting by maintenance personnel identified that the battery charger had failed. This impacted the capability and availability of the EDG to perform its safety function. This violation was of very low safety significance (Green) because the finding did not result in a loss of safety function for greater than the EDGs technical specification allowed outage time of seven days. This issue is described in corrective action program condition report IR 896256. Exelons corrective actions included replacing the #2 EDG battery charger, performing an extent of condition review on the #1 EDG battery charger, and revising maintenance procedures to include specific inspection guidance for the battery chargers. The #2 EDG was returned to service and declared operable on March 24 |
| Site: | Oyster Creek |
|---|---|
| Report | IR 05000219/2009003 Section 4OA7 |
| Date counted | Jun 30, 2009 (2009Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | S Pindale J Kulp M Ferdas T Fish R Nimitz S Chaudhary R Bellamy H Gray |
| INPO aspect | |
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Finding - Oyster Creek - IR 05000219/2009003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Oyster Creek) @ 2009Q2
Self-Identified List (Oyster Creek)
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