ML20040A519

Updated LER 81-005/01X-1:on 811015,during Insp,Battery Cell Case Found Weeping.Further Insp Revealed 17 Cells W/Cracks Near Molded Support Ribs on Bottom of Cases.Caused by Inadequate Support of Cells.Racks Modified & Cells Replaced

ML20040A519
Person / Time
Site:	Diablo Canyon
Issue date:	01/14/1982
From:	Kaefer W PACIFIC GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20040A514	List: ML20040A513 ML20040A519
References
LER-81-005-01X, LER-81-5-1X, NUDOCS 8201210204
Download: ML20040A519 (2)

Text

n Nmc FOmu 3s4 ff.771 U.S.NUCLEAn nECULATOnY COMMis$ TON LICENSEE EVENT REPORT EXHIBIT A CcN7 mot stoCx: l l l l l l l spLEAst ensur on type ALL neouineo iWronuArrows o i l 8 ICIA10lClPlll@itl 9 LeCIN$lt CQQ( B4 010 l- 1 OUCIN5% l010NWMSim l 0101- I 010 l@4 111111 2$ 25 UC&NS4 TYPE JO l 11@ l S3 CAI SS l@

CCYT 101 1 ,"CU 40[L_ @l015 l 01010121 715 @l1 101115 l A ll '@l011111418I21@

I & St OOCKET NuM9gn sa 69 EvgNT DAf t 74 7S atPORT oaf g 80 EVENT DESCRIPTION AND PRO 8 A8LE CONSEQUENCES h Lo..UJ l Prior to fuel load. durino an insoection conducted in coniunction with I g , routine surveillance testing, a battery cell case was found weeping. ,

g , Subsequent inspection has revealed 17 cells (3 in Unit I and 14 in Unit 2) ,

io,.,ii with cracks emanating near molded support ribs on the bottom of the case. j

, This event has the potential for causing loss of electrolyte. Thisincideny ici,i[ has in no way affected the safety and health of the public. Reportable ,

,, , , per Tech. Spec. 6.9.1.12.i.

, . , 3 n

C DE COOf SUBC E COMPONENT CODE (Tiil I E l Cl@ W@ IuX l@ lB l A l Tl TI R li Y g g@ Su[t@

Sue Of

. ,o it o ,. 1 n 7viNT veam '

,,Q 'n'i3Y>'m"T 4'>' E " "! ' "Ei"' "'",,7

@ ,"t,';;,",', I R 11 I v n l-l n

10 l 015 I 1 a.

lel In i 1l [JJ [, j Lij

. ., n , n as EN A ON PLANT METn D MOUm3 59 i D FO 8. Su L m MANu8ACTunge LA u J@LC.J@ LC1@ La ZJ@

l 010 10I of lNl@ l Ll@ lC11I7I3!@

>< as >> Aa L.1J@ ., ., A. .,

CAUSE DESCRIPTION AND CORREC rlVE ACTIONS i,iOi lThe apparent cause of the -batt y cell case cracking 1s inadequate support

, ,of the cells. -The vendor has since modified the battery rack design by add-g ing two suooort rails and relocating the existing two support rails. All m i attery b cells will be repla e d with cells with a new case design and the_ .

g ii n i , battery racks will be modified in accordance with (continued on attachment)  ;

STA % 4 909 tin OTMf m S T A TUS Ot5 Ov mv y [B,j@ lGl0l0l@l NA l lBl@[RoutineInspection OISCOvinv oISCms* TION f

ACT,viiv CD TENT mf L f A5E D Op m(Lf ASE AMOUNT O8 ACTaveTV LOCAT,0N OF RE tt ASE is Lz_J @ Lz.j@l NA NA l l I atm10NNE fsPOS E5 arvMega Tvrt Of1CaseTION 10 i 01 Ol@lIJ@l" NA I

..m,_,r.N zt, -

NuMeta OtSCme#TIO*e ITT 811010l0 7 9 e l@l 12 NA

' ' " to

.. '"J.5,'O ', ' " " @

>,,C IIIIl8(Jj@l 7 9 to NA -

I e, . i.ffF'"ilre 1 82 0121o406 ,

~

, , , ,"Z ~b l W,uEo ,nE AaEn W. B. KAEFER ,, o y , . (805) 595-7351

ATTACHMENT TO LER 81-005/01X-1 Ittm 27 Cause Description and Corrective Action, continund the manufacturer's recommendation.

Should Unit 1 fuel loading occur arior to installation of the new cells, sound cells from Unit 2 will be used to replace the Unit 1 damaged cells. This replacement will allow fuel load and operation in Mode 5.

l i