05000317/FIN-2008005-02
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Finding | |
|---|---|
| Title | Untimely Corrective Actions Associated with 480 Volt Power Supply Handswitch Disconnects |
| Description | A self-revealing NCV of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Actions, was identified because Constellation did not take timely corrective actions following the identification of degraded 480 volt power supply handswitch disconnects. This led to the failure of the Unit 1 No. 13 component cooling (CC) pump to start during performance of a surveillance test. The inspectors noted that Constellation had previously identified handswitch disconnects failures in 2006 and 2007. Immediate corrective actions included replacing the handswitch disconnect for the 13 CC pump, conducting an extent of condition review, and entering this condition into their CAP. The finding is more than minor because it is associated with the equipment performance attribute of the Mitigating Systems cornerstone and affects the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The inspectors determined that the finding was of very low safety significance because the finding does not represent the loss of system safety function, does not represent actual loss of safety function of a single train for greater than its technical specification allowed outage time, and does not screen as potentially risk significant due to external events. The finding has a cross-cutting aspect in the area of problem identification and resolution because Constellation did not take appropriate corrective actions to address safety issues associated with handswitch disconnects in a timely manner commensurate with their safety significance and complexity (P.1.d per IMC 0305). (Section 1R22 |
| Site: | Calvert Cliffs  |
|---|---|
| Report | IR 05000317/2008005 Section 1R22 |
| Date counted | Dec 31, 2008 (2008Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.22 |
| Inspectors (proximate) | M Davis D Tifft B Haagensen G Dentel T Burns S Kennedy N Perry R Rolph C Crisden J Hawkins |
| CCA | P.3, Resolution |
| INPO aspect | PI.3 |
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Finding - Calvert Cliffs - IR 05000317/2008005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Calvert Cliffs) @ 2008Q4
Self-Identified List (Calvert Cliffs)
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