ML20196B521

Special Rept:On 881030,Diesel Generator 1B Experienced Invalid Test Failure During Start Attempt 602.Applicable Procedures for Diesel Generator Testing Reviewed & Revised If Necessary

ML20196B521
Person / Time
Site:	McGuire
Issue date:	11/29/1988
From:	Tucker H DUKE POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
NUDOCS 8812060284
Download: ML20196B521 (3)

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, Duke 1%urt Company ll<i B. Takn i)ce President

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', PO Box 33198 Charlotte, N C 28242 Nuclear Prodanion (704)373 4531 u, r DUKEPOWER November 29, 1988 U.S. Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555

Subject:

McGuire Nuclear Station, Unit 1 Docket No. 50-369 Diesel Generator Special Report Gentlemen:

Pursuant to McGuire Technical Specifications 4.8.1.1.3 and 6.9.2, find attached a a special report concerning an invalid failure of Diesel Generator 1B .

Should there be any questions, please contact S.E. LeRoy at (704) 373-6233.

Very truly yours, sa Hal B. Tucker xc: Mr. M.L. Ernst

. Deputy Administrator, Region II U.S. Nuclear Regulatory Comission i 101 MaLietta St., NW, Suite 2900 Atlanta, GA 30323 fir. Darl Hood U.S. Nuclear Regulatory Comission Office of Nuclear Reactor Regulation Washington, D.C. 20555 Mr. P.K. Van Doorn NRC Resident Inspector McGuire Nuclear Station ,

i$ l 8812060284 881129 /

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Doedmnt Control Desk Novembe: 29, 1988 Pags 2 bx:: B.W. Bline 0.R. Bradshaw R.C. Futrell S.A. Gewehr R.L. Gill R.M. Glover (CNS)

G.W. Hallman C.L. Harlin (ONS)

A.D. Harrington (PSD) t P.R. Herran S.S. Kilborn ()()

J.J. Maher P.B. Nardoci A.R. Sipe.(MNS) ,

R.O. Sharpe (MNS)  !

G.B. Swindhhurst K.D. Thomas W.H. Taylor  :

V.B. Turner J.S. Warren R.L. Weber  ;

J.W. Willis QA Tech. Services NRC Coordinator (EC 12/55)

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g.ob U.S. Nuclear Regulatory Cornmission ,

Document Co7 trol D sk G November 29, 1988 ATTACHMENT '

Duke Power Company McGuire Nuclear Station Diesel Generator 18 Special Report On October 30, 1988 at 1335, Diesel Generator (DG) 1B experienced an invalid test failure during start attempt #602. Eighteen month preventative maintenance i had just been completed and this start attempt was the first of the break-in runs e fallowing the maintenance. During the start attempt, the DG required 11.4 seconds  !

to reach 4160 volts. l Unit 1 was in Mode 5, Cold Shutdown, at the time of the invalid failure, f During the 18 month preventative maintenance, all fual linos and injectors are removed, cleaned, tested, and reinstalled. Prior to completing the preventative r maintenance,(PT/0/A/4350/21), the fuel system is filled and vented; however, fuel t hes not yet entered the injectors. The first start attempt following the 18 month  ;

PT usually requires a longer start time for this reason. All ott.er starts following the initial start per procedure MP/0/A/7400/65 DG Break-In Runs, f were successful strrts. DG 1B successfully completed the DG operability test and was declared cperable at 1130 on November 3, 1988. ,

Applicable procedures for DG testing will be reviewed, and revised if necessary, i to improve the probability of successful starts following DG injector maintenance.

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