The team identified a finding of very low safety significance involving a non-cited violation of
10 CFR 50, Appendix B, Criterion XVI, Corrective Action, in that, Entergy did not promptly correct deficiencies with the B 125 Vdc battery charger supply circuit breaker. Specifically, Entergy did not properly evaluate and take adequate corrective actions for a
condition adverse to quality associated with elevated temperatures on the circuit breaker terminals; and subsequently, the circuit breaker failed when recharging the B 125 Vdc battery. Entergy entered the issue into their corrective action system, completed an
operability assessment, and reviewed installed circuit breakers to ensure a similar condition did not exist. The finding is more than minor because the degraded condition represented reasonable doubt on the operability of the B 125 Vdc charger and its associated breaker. The finding is associated with the equipment performance attribute of the
Mitigating Systems Cornerstone and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to
initiating events to prevent undesirable consequences. The team determined the finding was of very low safety significance (Green) because it did not result in the loss of system safety function. This finding has a cross-cutting aspect in the area of Problem Identification and Resolution, Corrective Action Program Component, because Entergy did not adequately evaluate the
condition adverse to quality, which they originally identified in January 2006 (
IMC 0305, Aspect
P.1(c)). (1R21.2.1.1