05000317/FIN-2010003-03
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Finding | |
|---|---|
| Title | Did Not Establish Preventative Maintenance Program for Switchyard Panels |
| Description | A self-revealing finding of very low safety significance was identified because Constellation did not establish an appropriate preventive rnaintenance (PM) program for the 125 volts direct current (VDC) switchyard distribution panels in accordance with MN- 1, \\\"Maintenance Program.\\\" The 125 VDC switchyard distribution system supplies power hto the switchyard direct current (DC) loads for the operation of switchyard circuit breakers, emergency lights, and protective relays. Immediate corrective actions included entering this issue into the CAP and performing an inspection of all 125 VDC switchyard distribution panels. Long-term corrective actions planned include establishing an adequate PM program for the 125 VDC switchyard distribution panels. The finding is more than minor because it is associated with the equipment performance attribute of the Initiating Events cornerstone and affects the cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety function. In addition, if left uncorrected, the performance deficiency could lead to a more significant safety concern. Specifically, the failure to establish an adequate PM program for the 125 VDC switchyard distribution panels could preclude the identification of equipment deficiencies, such as loose connections, that could result in a plant transient. The finding is 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 will not be available. This finding has a cross-cutting aspect in the area of problem identification and resolution, operating experience (OE), because Constellation did not use OE information, including vendor recommendations to support plant safety. Specifically, Constellation did not implement and institutionalize OE through changes to station processes, procedures, equipment, and training associated with the switchyard PM program (P.2.b of IMC 0305). |
| Site: | Calvert Cliffs  |
|---|---|
| Report | IR 05000317/2010003 Section 4OA3 |
| Date counted | Jun 30, 2010 (2010Q2) |
| Type: | Finding: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | K Mangan S Pindale G Dentel S Kennedy R Rolph J Hawkins R Montgomery M Osborn |
| CCA | P.5, Operating Experience |
| INPO aspect | CL.1 |
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Finding - Calvert Cliffs - IR 05000317/2010003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Calvert Cliffs) @ 2010Q2
Self-Identified List (Calvert Cliffs)
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