ML20090M809

Ro:On 731217,during Routine Surveillance Testing,Number 12 Diesel Generator Could Not Be Started Using Number 2 Starting Sys.Caused by Sticking Number 2 Starting Sys Air Relay Valve.Valve Disassembled,Cleaned & Relubricated

ML20090M809
Person / Time
Site:	Monticello
Issue date:	12/17/1973
From:	Larson C NORTHERN STATES POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 9105090413
Download: ML20090M809 (2)

Text

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STATES POWKM Penticello, Minnesota 55362 C O M P A N Y1 Q M -

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December 17, 1973 '

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Mr. J. G. Keppler, Regional Director '

f !I Directorate of Regulatory Operations g.

Q- ;i Region III a DECl31973 - n United States At amic Energy Comission 799 Roosevelt Road

43. ocm %, A/ 0 v 7*m8 G1m Ellyn, Illinois 61037 l' NEEfl, [p#/ sl

Dear Mr. Keppler:

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}DNTICDJD NUCLFAR GENERATING PIAlti  : Y Docket No. 50-263 License No. DPR-22 j g On December 17, 1973, during routine surveillance testing, the No. 22 diesel ger.erator could not be started using the No. 2 starting system. Investigation revealed that the No. 2 starting syste air relay valve was sticking and thus r not releasing the main air supply to the starting motors. '

i L The relay valve was disassembled, cleaned, and relubricated with silicon .

grease. The engine ws then successfully cranked six times by the Pio. 2 starting system.

Very t2uly yours ,I GE>

C. E. Larson

Plant Manager

}bnticello Nuclear Generating Plant  !

cc: J F O' leary G Charnoff Minnesota Pollution Control Agency -' sg 4%

.x Attn: Ken Dzugan , '

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1 AEC D"MIEUTION FOR PART 50 DOCKET 19 11AL CONT 10L NO: 9009

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Ak hi int DATE OF DOC DATE REC'D LTR PEM0 RPT OTHER -

I FROM: '

l Northern States Power Company Monticello, Minnesota 55362 12-17-73 12-18-73 Facsimile l

{ C. E. Larson

'M: ORIG CC OTHER SENT AEC PDR X l SENT LOCAL PDR X

] J. G. Keppler i t

! CLASS UNCLASS PROP INFO INPUT NO CIS REC'D DOCKET NO:

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! DESCRIPTION: ENCLOSURE 5: .

l Ltr reporting an abnormal occurrence on 12-17-7D ,

l in which the No. 12 diesel generator could not be started using the No. 2 starting system..... EXEWT P ' 7-- - - - - - -

i DO NOT REMOVE ,

! PLANT NAME: Monticello  !

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FOR ACTION /I!?OpATION 12-19-73 GC

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