05000400/FIN-2011008-07
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Finding | |
|---|---|
| Title | Failure to Test Safety-Related Molded Case Circuit Breakers |
| Description | The team identified a Green, NCV of 10 CFR Part 50, Appendix B, Criterion III, Design Control, for the failure to maintain the qualification bases for safety-related molded case circuit breakers (MCCBs). Immediate corrective actions included review of the MCCB testing and maintenance to validate current status. Permanent corrective actions are still being pursued by the licensee. The licensee entered this issue into the CAP as NCR 460900. The team determined that the failure to extend the qualified life of the installed Westinghouse MCCBs which were over 20 years old was a performance deficiency. The finding was more than minor because it affected the Mitigating Systems Cornerstone attribute of Design Control, and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, not maintaining qualified components in safety-related SSCs could lead to the inability to respond to design basis events. The finding was of very low safety significance because the finding was a design or qualification deficiency confirmed not to result in loss of operability or functionality. The team determined that no cross cutting aspect was applicable to this performance deficiency because this finding was not indicative of current licensee performance. |
| Site: | Harris  |
|---|---|
| Report | IR 05000400/2011008 Section 1R21 |
| Date counted | Jun 30, 2011 (2011Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21 |
| Inspectors (proximate) | S Walker C Baron G Skinner P Higgins D Mas-Penaranda R Patterson B Desai D Terri-Ward |
| INPO aspect | |
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Finding - Harris - IR 05000400/2011008 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Harris) @ 2011Q2
Self-Identified List (Harris)
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