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| Entered date | Event description | |
|---|---|---|
| ENS 45317 | 1 September 2009 09:10:00 | On July 31, 2009, (Crystal River Unit 3) personnel performed a video probe inspection of a spare safety-related Limitorque SB-3/SMB-3 actuator motor magnesium rotor and end rings. Visual indications were observed in the outboard end of the motor which were cause for rejection based on specified acceptance criteria. The specific indication was a cracked weld with dislodged metal in the outboard end of the motor. In 2007, the spare safety-related Limitorque SB-3/SMB-3 actuator motor (Motor Serial Number 7497004-001T1AL: Limitorque Part No. R-403-F04-0821) was purchased as safety-related Quality level 1 (QL-1) from AREVA under Purchase Order No. 337566. Limitorque purchased the motor from the Baldor Electric Company, doing business as the Reliance Electric Company, as commercial grade and dedicated the motor to safety related. The above evaluation was completed on August 28, 2009. The FPC director/responsible officer was notified of the above determination on August 31, 2009. The vendor (Limitorque) and the NRC Senior Resident Inspector have been notified of FPC's intent to report this issue under 10CFR21.21. The NRC Resident Inspector has been notified. |
| ENS 45286 | 24 August 2009 12:48:00 | Following completion of surveillance testing for the electrical checks of the Control Rod Drive power train, the operating crew observed that Group 7 regulating control rods unexpectedly lost power and inserted into the core. The Operators manually tripped the reactor prior to exceeding any RPS trip set point. There were no other safety system actuations and the plant is stable at normal post-trip temperature and pressure. There are seven rods in Group 7. Operators tripped the unit within 7 seconds. All rods fully inserted on the trip. The plant is removing decay heat through the main condenser and feeding generators with auxiliary feed. The licensee notified the NRC Resident Inspector. |