05000317/LER-1980-042-03, /03L-0:on 800806,during Normal Operation, Engineered Actuation Sys Channel Ze Was de-energized for Corrective Maint.Caused by Failure of Actuation Channel B Isolation Module within Channel Zd.Zd Module Replaced

/03L-0:on 800806,during Normal Operation, Engineered Actuation Sys Channel Ze Was de-energized for Corrective Maint.Caused by Failure of Actuation Channel B Isolation Module within Channel Zd.Zd Module Replaced

ML19344F078
Person / Time
Site:	Calvert Cliffs
Issue date:	09/06/1980
From:	Lagiewski J, Rizzo P BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19344F060	List: 05000317/LER-1980-042, Forwards LER 80-042/03L-0 05000317/LER-1980-042-03, /03L-0:on 800806,during Normal Operation, Engineered Actuation Sys Channel Ze Was de-energized for Corrective Maint.Caused by Failure of Actuation Channel B Isolation Module within Channel Zd.Zd Module Replaced
References
LER-80-042-03L, LER-80-42-3L, NUDOCS 8009120378
Download: ML19344F078 (1)

LER-1980-042, /03L-0:on 800806,during Normal Operation, Engineered Actuation Sys Channel Ze Was de-energized for Corrective Maint.Caused by Failure of Actuation Channel B Isolation Module within Channel Zd.Zd Module Replaced

Event date:
Report date:
3171980042R03 - NRC Website

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8 60 61 DOCK ET NUMB ER 68 69 EVENT DATE 74 75 REPORT DATE 80

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f EVENT DESCRIPTION AND PROBABLE CONSECUENCES h 1o12i IAt 0935-and again at 1020, during normal operation. Encineered Safety Features I

I lActuation System /ESFASl' channel 7F was daanorgivad'fnr encractiva maintansaca o 3 1o 141 leer T.S. 3.3.2.1.

The redundant channels remained coerable during tha avant 1

I iOisi IESFAS channel ZE was returned to-service at-1020'and again at 1254. This I

I 1o181 lis not a repetitive event.

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9 10 11 12 13 18 19 20 SeiOUENTIAL OCCURPENCE REPORT REVISION LER E"ENT YEAR REPORT NO.

CODE TYPE N O.

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lV l1 l3 l2 lg 33 34 36 37 40 41 42 43 44 47 JORRECTIVE ACTIONS h CAUSE DESCRIPTION A' li lo l IChannel ZE was deeneraized for troubleshootino ourot es.

Actuation Channel B I

m IIsolation Mcdule (Vitro No. 1628-1082) within Channel ZD had failed. resultino I

l n a trip signal to Channel B CIS Logic Modules. The Ch. ZD module was replaced I

i i,i2i iii3i lwith a spare from stock. No preventive action is deemed necessary at this I

tii4i Itime.

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% POWER OTHER STATUS iO RY DISCOVERY DESCRIPTION Ii isl l El@ l11 0l Ol@l NA l

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1 12 13 44 45 46 80 RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE l 1 l 6 I U @D OF RELEASELIj@lNA l.

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PERSONNEt Ex,OSSES NUM8ER TYPE DESCRIPTICN NA l

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DESCRIPTION

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<7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACILtTY TV'E CISCRIPTION 8 I 3@l NA-l

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