ML20100J072
| ML20100J072 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 02/21/1996 |
| From: | Saunders R VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Crisp R FEDERAL ENERGY REGULATORY COMMISSION |
| References | |
| F96-006, F96-6, NUDOCS 9602280226 | |
| Download: ML20100J072 (2) | |
Text
._.
~e Rc:Eni E SAUNDER$
/nnSbr00k IUChniCGl CCRter nce President - Nuclear Operations 5000 lbmmion Boulemrd Glen Allen, nrginia 23060 4
804 e273*21dl February 21, 1996 Mr. R. W. Crisp Serial No. F96-006 Regional Director Federal Energy Regulatory Commission 3125 Presidential Parkway, Suite 300 Atlanta, Georgia 30340
Dear Mr. Crisp:
PROJECT NO. 6335-VA NORTH ANNA HYDROELECTRIC PROJECT SPILLWAY EMERGENCY DIESEL GENERATOR START FAILURE Pursuant to the requirements of 18 CFR 12.10(a), Conditions Affecting the Safety of a Project, we are submitting this report of a condition which affects the Spillway Emergency Diesel Generator (SEDG) at the North Anna Main Dam.
On February 5,1996, at 0635 hours0.00735 days <br />0.176 hours <br />0.00105 weeks <br />2.416175e-4 months <br />, normal AC power to the main dam was lost due to severe winter weather conditions, and the SEDG failed to start automatically. At 0650 hours0.00752 days <br />0.181 hours <br />0.00107 weeks <br />2.47325e-4 months <br />, normal AC power was restored. The initial manual start of the SEDG was unsuccessful.
Trouble-shooting activities identified a control relay operating intermittently. The control relay and the remote selector switch were replaced on February 7,1996. On February 7,1996, following repairs the SEDG was successfully j
started.
4 Failure of the SEDG to start automatically did not pose any significant safety concems since the spillway gates are designed to be operated manually if a loss of both normal and emergency AC power occurs.
Station procedures provide directions to Operations personnel if manual gate control becomes necessary.
This event was reported by telephone to the Federal Energy Regulatory Commission at 0711 hours0.00823 days <br />0.198 hours <br />0.00118 weeks <br />2.705355e-4 months <br /> on February 5,1996. The Nuclear Regulatory Commission was also contacted by telephone at 0951 hours0.011 days <br />0.264 hours <br />0.00157 weeks <br />3.618555e-4 months <br /> on February 5,1996, as required by 10 CFR 50.72(b)(2)(vi).
Should you have any questions regarding this report, please contact us.
Very truly yours, l
0N R. F. Saunders
'g 9602280226 960221 PDR AD3CK 05000330 I p S
PDH
', i cc:
. U.S. Nuclear Regulatory Commission '
Attn: Document Control Desk Washington, D. C. 20555 License Numbers: NPF-4/NPF-7 Docket Numbers:
50-338/50-339 U.S. Nuclear Regulatory Commission Region ll 101 Marietta Street, N.W.
Suite 2900 Atlanta, Georgia 30323 Mr. R. D. McWhorter NRC Senior Resident inspector North Anna Power Station i
I J