05000348/FIN-2010005-03
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Finding | |
|---|---|
| Title | Flame Detected on the 1A RCP Handswitch |
| Description | An issue of concern revealed itself regarding the discovery of a flame on the 1A RCP handswitch in the main control room. This issue of concern is being opened as an unresolved item (URI) in order to conduct additional inspection. On November 10, 2010, with the unit shutdown for the RFO, the licensee attempted to start the 1A RCP after completing modification to the seal package of the pump. During the seal package modification, the licensee also completed calibration of the oil pressure switch. This calibration was a bench calibration resulting in the removal of the pressure switch from its 125 vDC circuit. During the reinstallation of the pressure switch, the licensee also replaced conduit in which the controls and power for the switch were routed to the RCP motor. The control room operator took the control handswitch to start and the amber indicating light illuminated, the red indicating light for breaker closure failed to illuminate, and an audible frying noise was heard. The control room operator and control room supervisor noticed a flame emanating from the handswitch and blew out the flame. The inspectors did not identify an immediate safety concern for this issue because the licensee immediately extinguished the small flame by blowing it out. The license replaced the handswitch and performed troubleshooting of the oil pressure switch. The licensee was able to successfully start the RCP following the above activities. The licensee entered this event into its CAP as CR 201011613. The inspectors interviewed station personnel and concluded more information was needed to ascertain if a performance deficiency existed. The licensee had not completed its cause determination at the time of these interviews. The inspectors also concluded in that order to determine if a performance deficiency exists and disposition this issue of concern, additional inspection would be required to understand: 1) the exact cause of the flame from the handswitch; 2) the extent of condition associated with this issue supported by review of the licensees cause determination and associated WOs; and 3) the licensee planned corrective actions. This issue of concern was identified as URI 05000348/2010005-03, Flame Detected on the 1A RCP Handswitch. |
| Site: | Farley  |
|---|---|
| Report | IR 05000348/2010005 Section 4OA2 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | A Nielsen B Caballero B Collins C Dykes E Crowe G Kuzo J Sowa R Carrion S Shaeffere Crowej Sowa S Shaeffer W Rogers |
| INPO aspect | |
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Finding - Farley - IR 05000348/2010005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Farley) @ 2010Q4
Self-Identified List (Farley)
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