ML20151Y110
| ML20151Y110 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 04/22/1988 |
| From: | Gucwa L GEORGIA POWER CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 88-002, 88-2, SL-4483, NUDOCS 8805040346 | |
| Download: ML20151Y110 (3) | |
Text
Georg a Po6er Cynpany 333.P+dmont A,enu)
PaNa. Georg : 30303 Toephov 404 526 65?6 Vai g Ad?ess r
Pes:O N e Bev4545 Rau Georg a 30302 Georgia Power L.T.Gucwa
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vanax.ou ear saw and Lcem ng SL-4483 0875m X7GJ17-V540 April 22, 1988 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Hashington, D.C.
20555 PLANT V0GTLE - UNIT 1 NRC DOCKET 50-424 OPERATING LICENSE NPF-68 SPECIAL REPORT 88-002 INVALID DIESEL GENERATOR FAILURES Gentlemen:
In accordance with the requirements of the Plant Vogtle - Unit 1 Technical Specification section 4.8.1.1.3 and 6.8.2, Georgia Power Company is submitting the enclosed Special Report concerning invalid diesel generator failures.
Sincerely,
- P m L. T. Gutwa PAH/Im
Enclosure:
SR 50-424/1988-003 c: Georaia Power Comoany Mr. P. D. Rice Mr. G. Bockhold, Jr.
GO-NORMS IL S. Nuclear Regulatory Commission Dr. J. N. Grace, Regional Administrator Mr. J. B. Hopkins, Licensing Project Manager, NRR (2 copies)
Mr. J. F. Rogge, Senior Resident Inspector-Operations, Vogtle 8605040346 S80422 ADON 0500 g 4 S
PDR I
v r
GeorgiaPower A ENCLOSURE f
PLANT V0GTLE - UNIT 1 i
NRC DOCKET 50-424 OPERATING LICENSE NPF-68 SPECIAL REPORT 88-002 A.
Requirement for Report L
This report is required in accordance with the Plant Vogtle - Unit 1 i
Technical Specifications section 4.8.1.1.3.
This section of the f
Technical Specifications requires that all diesel generator failures, valid or nonvalid, shall be reported to the Commission in a Special Report pursuant to Specification 6.8.2 within 30 days.
This report L
is being submitted due to the recent clarification by the NRC -
Region II of the definition of an invalid failure.
B.
Description of Invalid Failures for the Train A Diesel Generator On February 18, 1987 Start No.
1-87-0043 was attempted after performing maintenance activities on the Unit 1 - Train A diesel I
generator.
Shortly after startup, the engine trisped.
A subsequent investigation revealed the valve from the fuel 011 day tank to the diesel was locked closed, thus starving the engine.
Start attempts 1-87-0044 and 1-87-0045 were subsequently attempted, but a loose fitting of the right b?,nk turbocharger pressure switch prevented the t
diesel from starting.
Ihe operator noticed that the turbocharger oil pressure was above the trip setpoint for each start.
The fitting was tightened and the surveillance was completed with successful start I
attempt 1-87-0046.
These attempts (43,44,45) were invalid failures to start.
3 On June 23, 1987, start attempt 1-87-0055 was performed on the Unit 1 i
i,
- Train A diesel generator.
The generator was paralleled to the grid l
and loading was in progress when the operator noticed air escaping i
from some of the cylinder locks.
The cutput breaker was tripped and the diesel was shut down.
The cylinder locks had been left open
[
following the performance of the routine checks.
The operator failed to follow the procedure. This was an invalid failure.
2 f
f I
t 0875m E-1 04/22/88 SL-4483 mm
Georgialbwer d ENCLOSURE (Continued)
SPECIAL REPORT 88-002 C.
Description of an Invalid Failure for the Train B Diesel Generator On February 6, 1987, start no. 1-87-0036 was performed on the Unit I
- Train B diesel generator.
While the generator was being paralleled to the grid, the operator allowed the KVAR to go negative for a percent of time sufficient that the loss of excitation relay tripped the output breaker and the diesel.
For this event, the operator failed to follow a procedure.
This was an invalid failure.
D.
Summary All the above failures to start were. invalid ~ failures..There was no change to the surveillance frequency since these were invalid failures.
I l
0875m E-2 04/22/88 SL-4483 mm