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| Entered date | Event description | |
|---|---|---|
| ENS 41499 | 16 March 2005 19:55:00 | The following information was provided by the licensee via facsimile (licensee text in quotes): At 0943 with Columbia Generating Station operating at 100% power the High Pressure Core Spray (HPCS) system was taken out of service for maintenance. During the maintenance activity, severe cracking and degradation was discovered on the upper air deflector of the HPCS pump motor. This component functions to direct air into the motor housing to provide cooling while the system is operating. A preliminary evaluation determined this represents a condition that at the time of discovery could have prevented fulfillment of the safety function of the HPCS system to mitigate the consequence of an accident and is reportable pursuant to 10 CFR 50.72(b)(3)(v)(D). Upon discovery of this condition plant operators fulfilled the action required by Technical Specifications LCO 3.5.1 condition B to verify by administrative means that the Reactor Core Isolation Cooling (RCIC) system is operable and took action to restore the HPCS system to operable status within 14 days. No other systems were required to function in response to this event. The licensee notified the NRC Resident Inspector. |