On June 25, 2005 at 2042, Clinton Power Station received indications of loss of the Reserve Auxiliary Transformer (
RAT). Upon investigation, it was discovered that Gas Circuit Breaker (GCB) 4522 had suffered catastrophic failure resulting in a lockout of the North Bus, which supplies the
RAT.
Offsite assistance was requested, as a precautionary measure, from the Local Law Enforcement Agency, Medical, and Fire Departments. The onsite Operations Fire Brigade extinguished the fire in the GCB 4522.
Clinton Power Station remained online at full electrical load during the event and is stable. Restoration and recovery is now in progress.
The NRC Resident Inspector has been informed.
The licensee stated that local law enforcement (Dewitt County Sheriff) departed the site at 2130
CDT and that nothing of a suspicious nature was found. The incident is considered to be solely the result of a component failure.
