ML20062D388

Reports That Addl Isolation Bar Must Be Added to Class IE Battery Racks Sent to Subj Facils in Order to Isolate Horizontal Momentum During Seismic Events.Design Is Being Worked Out & Will Be Ready in 60 Days for Retrofit

ML20062D388
Person / Time
Site:	Midland
Issue date:	10/11/1978
From:	Mcmanus C ESB, INC.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20062D387	List: ML20062D381 ML20062D388
References
HOWE-235-78, NUDOCS 7811220178
Download: ML20062D388 (1)

Text

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! @.im.9@yl4[EfEjl$ssg@@p Attachment to 1 0131821Ad84002 10/11/78 TFX ESB DATA B PGHA Hovc-235-78 01 r10RSHAM, PA OCTOBER 11 s1TSSARD - REGION III HAYNES - REGION V 7- p g j gg -

XOOS - IE:HQ USNRC OFFICE OF'INSPFCTION AND E.NFORCEMENT C 631, PARK AVENUE O,.

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EAIDE INDUSTRIAL dATiE.RY DIVISION OF ESB INCORPORATED BELIEVES ,

THERE IS A POTENTIAL PROBLEM wITH PRODUCT IT HAS SUPPLIED RECENTLY }

TU SOUTHERN CALIFORNIA EDIS0N FOR TetEIR S A.N. O N O F R E UNITS 2 AND 3 ,!

AND CONSUHERS POWER ro. FOR THEIR HIDLAND UNITS 1 AND C, bbICH H A Yf BE ,iEPORT ABLE UNDEd* 10CFR 21. IT HAS BEEN OETERPINED BY EX1DE W SEISMIC ANALYSIS C GSULTANT THAT AN ADDITIONAL ISOLATION BAR IS RE00!dE0 10 6E ADDED TO THE CLASS 1E BATTkRY RACKS TO ISOLATE, IN Tw0-CELL INCREMENTS, THE :$UILD UP OF tt0RIZONT AL HOME.NTUM IN A STRING OF CELLS ON A BATTEPY.RACKLSTEP DURING A S E I S t'I C EVENT.

THIS ADDITiuNAL PIEC'E IS NOT REQUIRED FOR THE STRUCTURAL IfJTEGRITY B U V F O,R T rt E ISOLATIdh DF MOMENTUM AND WILL HDT AFFECT THE S1HUCTURAL INTEG#ITY OF T HE C L[A,S S IL 6ATTERY RACKS.

EXIDE IS CURRENTLY WORFING ON THE DESIGN OF SUCH AN ACCESSORY FOR THE ADDITION 10 inE PRODUCT SUPPLIED FOR THE AFOREMENTIONED CON-STRUCTION PbASE NUCLEAR GENERATING STATIONS. EXIDE SHOULD HAVE THIS ITEM AVAILABLE FOR RETRO-FIT wITHIN 60 DAYS.

THE NEED FOR SUCH ITEH wAS DETERMINED 10/10/78.

THIS N01IFICATION IS APPLICABLE TO THE FOLLOWING CLASS 1E DATTERY RACNS FUR THE SOUTHERN CALIF 0dNIA EDISON SAN ONUFRE NUCLEAR GENERA-TING STATIDNt UNIT d UNIT 3 26009, 26010, 20007, 2B006 3B009, 3B010, 39007, 30008 CONSUPERS POWER HIOLAND NUCLEAR GENERATING STATIONS 1 82 UNIT 1 UNIT 2 1001, 1002 2001, 2002 THIS POTENTI AL PROBLEM H AS uEEN RE ALIZED BY EXIDE kHO IS ACTING TO RECTIFY THE PRonLEM AT THIS TIME. THE PERSON TO Cot. TACT FOR ADDITION-AL INFGHMATION HELATIVE To THIS WIRE IS MR, C. K. MC MANUS AT EXIDE, AvAllA6LE AT T E L E P riuNE (215) 674-9500.

THIS NOTIFICATION IS oEING MADE IN ACCORDiNCE WITt, THE HEDUIREHENTS OF TITLE 10 0F THE CODE OF FEDERAL REGULATIONS, PART 21.

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