05000416/FIN-2008002-06
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Finding | |
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| Title | Ineffective Corrective Actions in Response to Resin in the Electrohydraulic Control System |
| Description | The inspectors identified a finding involving ineffective corrective actions in response to resin intrusion in the electro-hydraulic control system. The inspectors reviewed the corrective actions from a condition report involving a resin intrusion into the electro-hydraulic control system via a failed temporary ion-exchange filter in 2003. Review of the corrective actions associated with the 2003 event revealed that a long-range recovery plan was developed to remove resin from the electro-hydraulic control system. However, the recovery plan corrective actions were closed without licensee actions to remove resin from the electro-hydraulic control system. The failure to implement effective corrective actions following the 2003 resin intrusion event directly resulted in electro-hydraulic control stability issues seen in the fall of 2007, including reactor pressure perturbations and reductions in reactor power. This issue was entered into the licensees corrective action program as Condition Report CR-GGN-2007-04972. The finding was more than minor because it was associated with the initiating events cornerstone attribute of equipment performance and affected the associated cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions during power operations. Using the MC 0609, \"Significance Determination Process,\" Phase 1 worksheet, the finding was determined to have very low safety significance because the finding did not contribute to the likelihood that mitigating equipment would not be available following a reactor trip (Section 4OA2). |
| Site: | Grand Gulf  |
|---|---|
| Report | IR 05000416/2008002 Section 4OA2 |
| Date counted | Mar 31, 2008 (2008Q1) |
| Type: | Finding: Green |
| cornerstone | Initiating Events |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | R Deese P Elkmann R Smith A Barrett D Bollock |
| INPO aspect | |
| ' | |
Finding - Grand Gulf - IR 05000416/2008002 | |||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Grand Gulf) @ 2008Q1
Self-Identified List (Grand Gulf)
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