05000244/LER-2005-003, R. E. Ginna Nuclear Power Plant Regarding Emergency Diesel Generator Start Resulting from Loss of Off-Site Power Circuit 751
| ML052240258 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 08/08/2005 |
| From: | Korsnick M Constellation Energy Group |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 1001363 LER 05-003-00 | |
| Download: ML052240258 (9) | |
| Event date: | |
|---|---|
| Report date: | |
| 2442005003R00 - NRC Website | |
text
Maria Korsnick Vice President Constellation Energy I
R.E. Ginna Nuclear Power Plant 1503 Lake Road Ontario, New York 14519-9364 585.771.3494 585.771.3943 Fax maria.korsnick@ constellation.com August 8, 2005 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
SUBJECT:
Document Control Desk R.E. Ginna Nuclear Power Plant Docket No. 50-244 LER 2005-003. Emergency Diesel Generator Start Resulting From Loss of Off-Site Power Circuit 751 The attached Licensee Event Report (LER) 2005-003 is submitted in accordance with 10 CFR 50.73, Licensee Event Report System, item (a)(2)(iv)(A). This event has in no way affected the public's health and safety. There are no new commitments contained in this submittal. Should you have questions regarding the information in this submittal, please contact Mr. George Wrobel at (585) 771-3535 or George.Wrobeliconstellation.com.
Very truly yours, Mary nick MC/MR Attachments:
(1) LER 2005-003 cc:
S. J. Collins, NRC P.D. Milano, NRC Resident Inspector, NRC (Ginna)
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1001363 4-&
ATTACHMENT (1)
LER 2005-003 R.E. Ginna NPP August 8, 2005
Abstract
On June 10, 2005, a lightning strike resulted in the loss of off-site Circuit 751. With the electrical system in a 50/50 alignment, the loss of Circuit 751 resulted in the loss of safeguards busses 16 and 17. The B Emergency Diesel Generator (EDG) started automatically and re-energized Bus 16. The Bus 17 feeder breaker from the B EDG failed to close resulting in the temporary loss of Bus 17. The A Service Water Pump (SWP) motor faulted and tripped when manually started per procedure.
Corrective action to prevent recurrence is outlined in Section V.B.
NRC FORM 366 (7-2001)
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COMPONENT Off-Site Power Circuit 751 Emergency Diesel Generators Insulator Electric Motor IEEE 803 IEEE 805 FUNCTION IDENTIFIER SYSTEM IDENTIFICATION Jx EA DG EK INS EA MO BI Circuit Breaker BKR EK
- D.
SPECIAL COMMENTS:
The failure of the B EDG supply breaker to Bus 17 was caused by lack of sufficient lubrication. Technician coaching has been performed, and steps to identify and lubricate other susceptible breakers have been initiated per the Ginna Corrective Action Process.
The failure of the A SWP motor was caused by motor insulation failure. The cause of the insulation failure is under extensive evaluation per the Ginna Corrective Action Process.