ML19343C218

AO 50-219/75-33:on 751212,during 6-month Load Test on Station a batteries,125 Volt Dc Distribution Ctr de-energized.Caused by Personnel Error in Following Procedure.Distribution Ctr re-energized

ML19343C218
Person / Time
Site:	Oyster Creek
Issue date:	12/23/1975
From:	Ross D JERSEY CENTRAL POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
AO-50-219-75-33, RO-751223, NUDOCS 8103020649
Download: ML19343C218 (1)

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lENSEE EVENT REPORT M/#//7933 CONTROL BLOCK:( l l l l l l [PLEASE PRINT ALL CEQUIRE]INFERMATION

, 1 6 NA .IF tCENSE NuYPE A v f PE o1 l Nl Jl0lC lP l1l [ 0 l 0l-l 0l 0l 0 l 0 l 0 l-l 0 l 0 l l4 l 1 l 1l 1l 0] l0l1l 7 US 14 15 25 26 3J 31 32 CATEGOAV t & DOC

• ET NOVHf A f vf NT Catt REPORT DAtt 01 covT l M l I l [T.] [.L_j l 015 l 01-10 i211 19 l 11121112171Sl 111212131715-7 8 57 58 59 60 61 68 69 74 75 8; EVENT DESCRIPTION During a routine 6-month load test on A station batteries, personnel g5 jerror in following procedure 601.2.2 caused the 125 volt D.C. distribution center to I 7 8 'De deenerg1 Zed. Af ter reenerg1 Zing the center, the A, C and E recirculation pumps, et M [A feedwater pump and cleanup system A recirculation pump tripped. _(This is expected l 7 8 9for the return of D.C. power). Plant shutdown cr venced Inmediately Decause 01_ Oc EE llicense requirements. Recirculation pumps became operable and load reduction was l 7 8 9 terminated. BC 59 I I 7 89 BC BD i I 7 89  %.g 80 E CODE COVpONf NT CODE A M

• J8 i A WAAYON e

7 89 10 l El Cl [A_J lZlZlZlZlZlZl W 44 lZl9l9191 LYJ 11 12 17 43 47 du CAUSE DESCRIPTION personnel error in following procedure 601.2.2 caused the 125 volt

@ l D.C. distribution center to be deeneraiZed. The distribution center was immediately l 7 89 reenergized. A change has been drafted to existing procedure 601.2.2 to define eo E l mnra clearly the steps to be taken in preparation for conducting the battery load l 7 8 9 gggt, pg 1

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iEs' sv s rowEa ornER srAius "o!s'CovrO[ oiscoviar oEscasroN 7 8 i y 9

l 0l 8l 6l l NA l [ B_J l NA l 10 12 13 44 45 46 80 RELE SEO 08 EL ASE AVOUNT OF ACTIVITY LOCATON Or RELEASE 1

l_Zj (_Zj l NA l l NA l 7 8 9 10 11 44 45 60 PERSONNEL EXPOSURES NUMBE R TvPE DE SCMTON i 10101 of LZj i NA l 7 89 11 12 13 80 PERSONNEL INJUAIES Nu' O A CE SCA,pT ON 7 89 11 12 80 OFFSITE CONSEQUENCES DE l NA l 7 85 80 LOSS OR OAMAGE TO FACILITY i e s *E DE SCropiirira 1

l NA l 7 89 10 60 PUBLICiT Y 1

l NA l 7 89 60 t.ODiTIONAL FACTORS DE I I 7 89 80 1

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