05000335/FIN-2010003-03
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Finding | |
|---|---|
| Title | Failure to Take Timely and Effective Corrective Actions to Prevent RCS Pressure Boundary Leakage through the RCP Seal Lines |
| Description | A self-revealing NCV of 10 CFR 50, Appendix B, Criterion XVI, Corrective Action, was identified when a reactor coolant pump (RCP) seal line weld failure resulted in RCS pressure boundary leakage in July 2009. Specifically, the licensee failed to prevent the recurrence of RCS pressure boundary leakage, a significant condition adverse to quality, caused by conditions of low stress, high-cycle fatigue affecting RCP seal line welds. Licensee personnel shutdown the reactor and entered reduced inventory operations to perform repairs. The issue was entered into the CAP
The finding was more than minor because it was associated with the equipment performance attribute of the Initiating Events cornerstone and affected the cornerstone objective of limiting the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. Specifically, the finding was associated with repeated RCP weld failures and affected the integrity of the RCS pressure boundary. The finding was determined to be of very low safety significance because it did not contribute to both the likelihood of a reactor trip and the likelihood that mitigation equipment or functions would not be available. The inspectors determined that the cause of this finding was related to the appropriate and timely corrective actions aspect of the CAP component in the problem identification and resolution crosscutting area. |
| Site: | Saint Lucie  |
|---|---|
| Report | IR 05000335/2010003 Section 4OA5 |
| Date counted | Jun 30, 2010 (2010Q2) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | |
| Inspectors (proximate) | J Griffis G Kuzo A Vargas-Mendez T Hoeg R Carrion S Sanchez D Rich C Fletcher |
| CCA | P.3, Resolution |
| INPO aspect | PI.3 |
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Finding - Saint Lucie - IR 05000335/2010003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Saint Lucie) @ 2010Q2
Self-Identified List (Saint Lucie)
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