ML20195H379

Special Rept 88-002:on 870218,0623 & 0206 Engine Tripped,Air Escaped from Cylinder Locks & Output Breaker & Diesel Tripped Respectively.Caused by Valve from Fuel Oil Day Tank to Diesel Closed & Personnel Error

ML20195H379
Person / Time
Site:	Vogtle
Issue date:	06/17/1988
From:	Hairston W GEORGIA POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
88-002, 88-2, SL-4805, NUDOCS 8806280277
Download: ML20195H379 (3)

Text

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'- Georg:a ,Ner Cofroany 333 Piedmori Avenue .

IAtlanta. Georgia 30303 Telephone 404 5264526 Wing Address:

Post Office Box 4545 At:arra. Georgta 30302 Georgia Power Nuclear Operations Department N mpen eeoc sprem SL-4805 0980m X7GJ17-V540 June 17, 1988 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Hashington, D.C. 20555 PLANT V0GTLE - UNIT 1

NRC DOCKET 50-424 l OPERATING LICENSE NPF-68 SPECIAL REPORT l INVALID DIESEL GENERATOR FAIL ljEIS I

i 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 rivised Special Report concerning invalid diesel generator failures. The enclosed report supercedes the special report previously submitted by eur letter SL-4483 dated April 22, 1988.

j Sincerely, td,[. b8 H. G. Hairston, III

, Senior Vice President l

PAH/im

Enclosure:

Special Report 88-002, Revision 1 c: Georaia Power Comoany Mr. P. D. Rice l Mr. G. Bockhold, Jr.

l GO-NORMS l

i U. S. Nuclear Reaulatory Commission n r. J. N. Grace, Regional Administrator l

M.. L 8. Hopkins, Licensing Proj)ct Manager, NRR (2 copies) i Mr. J. F. Rogge, Senior Resident Inspector-0perations, Vogtle l

8806280277 080617 PDR ADOCK 05000424 g

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GeorgiaPower A ENCLOSURE PLANT V0GTLE - UNIT 1 NRC DOCKET 50-424 OPERATING LICENSE NPF-68 P

SPfCJAL REPORT 88-002 A. Requirement for Report This report is required in accordance with the Plant Vogtle - Unit 1 Technical Specifications section 4.8.1.1.3. This section of the 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 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 generator. Shortly after startup, the engine tripped. A subsequent investigation revealed the valve from the fuel oil day tank to the diesel was locked closed, thus starving the engine. Start No.

1-87-0044 was attempted but a pre-lube valve was left open. This led to a trip due to low turbocharger oil pressure, a normal trip function which is bypassed in the emeigency mode. Start No.

1-87-0045 was attempted and the pro-lubt valu was closed in a timely manner. However, a low turbocharger oil pressure trip occurred again, even though a turbocharger oil pressure gauge registered a pressure above the trip setpoint. A search discovered a loose fitting on the right bank turbocharger pressure switch. The fitting was tightened and a successful start was achieved on Start No.

1-87-0046.

On June 23, 1987, start attempt 1-87-0055 was performed on the Unit 1

- Train A diesel generator. The generator was paralleled to the grid and loading was in progress when the operator noticed air 1 scaping from some of the cylinder locks. The output breaker was tripped and the diesel was shut dowm 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.

0980m. E-1 06/17/88 SL-4805 m _ - _ _ _ _ _ _ _ _ _ _ _ _ - _ _ _ _ -

r ,,

. Georgia Power 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 1

- 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 bieaker 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.

J 0980m E-2 06/17/88 SL-4806 700W$