ML20083Q815

AO 73-11-13:on 731113,one Reserve Power Transformer Removed from Svc.Caused by Ground in Wire Supplying Duct Heater Across One Phase of Secondary Transformer.Wire Removed & Transformer Returned to Svc

ML20083Q815
Person / Time
Site:	Nine Mile Point
Issue date:	11/16/1973
From:	Perkins T NIAGARA MOHAWK POWER CORP.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
AO-73-11-13, NUDOCS 8303140640
Download: ML20083Q815 (2)

Text

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Fh0H: T, J, PERtlHS - HillE'~TLE 'P01t!T IlVCLEAR STATIDH .

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A,DR03nAL DECUnittifCE 73-11 ,13 _

L ~ t op Or Ditt iti'5ERVE P0Hl1LTy/A,t[5,r,0,rnEjt 10 ACCORDA!iCL illlH TECHillCAL 5PECIFICAT10!IS 1.13 d AflD SPECIF1 CAT 10!i 3.6.3 d -

SPLC11ICATION:

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u. 10!! ALL REACTOR OPERATING C0lDITIG!l3 EXCEPT COLD situtDOW!l, TilERE SHALL l

liORIGLI.Y BE AVAILABLE TWO 115 KV EXTERiiA1, Lilies, TWO D!ESFL-GENERATOR POWER SYSTEMS AND TWO BRTTERY SYSTEMS ...

l A GP.00HD OCCURRED 04 THL 4 KV SEC0!iDARY OF 1015 RESERVE POWER TPAH5FOPJtLR RLQUIRING t

TRAH5FEi; 0F LOAD TO 101H A!!D THE Rett 0 VAL OF 101S TRAli5FORMER FROM SERVICE AT NO3 !!OURS Oil lifl3/73.BOTil 115 KV LILIES HERE OPERADLE. AS WERE.l.hE TWO DIESEL GEN-LWU01: SYSTEMS. iiOWEVER, Tilt RESERVE iPldtSFORiiER J0PJls All IllTEGPAL PART '0E Tile lib KV REEEPYE P0HER SYSTER FOR lilllE iiILE POINT UNIT 1 A!iD THUS OHE OF THESE TWO SYSTEMS KAS IUDPECABLE WITH THC REl!0 VAL OF 1015 TPJdl5FORiiEit. SUB5EQUtHT lilVEST10hT10li SHOWED A 600 ' JOLT illitL SUPPLYlliG THE DUCT HEA_iER, ACROSS OME PRASE OF THE SECONDARY OF THE TRAli5FO' iER. THE HIRE WAS REMOVED A!(D Tile TPANSFORl!ER PLACED DACK I!! SERVICE AT l

1713 il0URS 11/13/73. ,

f)ASf D UPOM Tite FACT TilAT TWO DIESEL GENERATORS WERE AVAILABLE AS HELL A5 ONE Il5 fV RESERVL POWER SYSTEM !!0 DIFFICULTIES WOULD HAVE BEEll EllCOUHTERED HAD THESE SYSTEMS BEEH REQt) IRED FOR OPERATIOil. THEREFORE, H0 llAZARD UAS PRESENTED TO Ti(E GE!iERAL PUBLIC l DURI!!; Tile TillE 10lS TRAllSf0RHER WAS REMOVED FROM SERVICE.

T. J. PERKINS STATI0H 5UPEP.111TEliDENT liltlE MILE P011lT HUCl, EAR STAT 1on 8303140640 731116 ~

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m.,,.. .yn:o uunALs atuanas RO Chief FS&E NINE MILE POINT NUCLEAR STATION RO:HQ (5)

R0 File OGC cart A0 73-11-13 Central Mail & Files TO (Name and u>at! IMtTIALS REMARKS Regulatory Standards (3)

Directorate of The above abnormal. occurrence is forwarded Licensing (13) eart g, Regional Directors for information.- Distribution will be made

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To (Name and unft) penALS by this office to the PDR, Local PDR, NSIC, REMARKS r

DIIE, and state representatives.

pars FROM (Name m-.J un t) ntuAnns E. 6.;Brunnerg y ;s. w '

Region 1

• PHONE NO, .

DATE 8/337/1246 11/16/73 '

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