05000368/LER-1981-010-03, /03L-0:on 810212,during Mode 1 Operation,Control Element Assembly Calculator (Ceac) 2 Found Inoperable.Cause Unknown.Ceac 2 Returned to Operable Status by Reinitializing Sys.All Failure Indications Returned to Normal

/03L-0:on 810212,during Mode 1 Operation,Control Element Assembly Calculator (Ceac) 2 Found Inoperable.Cause Unknown.Ceac 2 Returned to Operable Status by Reinitializing Sys.All Failure Indications Returned to Normal

ML20008F245
Person / Time
Site:	Arkansas Nuclear
Issue date:	03/05/1981
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20008F241	List: 05000368/LER-1981-010, Forwards LER 81-010/03L-0 05000368/LER-1981-010-03, /03L-0:on 810212,during Mode 1 Operation,Control Element Assembly Calculator (Ceac) 2 Found Inoperable.Cause Unknown.Ceac 2 Returned to Operable Status by Reinitializing Sys.All Failure Indications Returned to Normal
References
LER-81-010-03L, LER-81-10-3L, NUDOCS 8103120626
Download: ML20008F245 (1)

LER-1981-010, /03L-0:on 810212,during Mode 1 Operation,Control Element Assembly Calculator (Ceac) 2 Found Inoperable.Cause Unknown.Ceac 2 Returned to Operable Status by Reinitializing Sys.All Failure Indications Returned to Normal

Event date:
Report date:
3681981010R03 - NRC Website

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,*t M TDATE so EVENT DESCRIPTION ANO PROS ABLE CONSEQUENCES io e IDuring Mode 1 operation, CEA Calculator (CEAC) #2 was found to be inoper-I table.

CEAC #2 was placcd in the "in oc" mode for all four core Protectiors o

mT1 ICalculator channels. CEA positions were monitored on four hour intervals 1 las required by T.S. Table 3.3-1 Action #5a.

CEAC #1 remained operable.

I o s fo TF1 ISimilar to 1.ER's 50-368/80-058 and 80-053.

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CAUSE OESCRiPTION AND CORRECnVE ACTIONS 27 I Investiaation did not reveal the cause for the CEAC #2 failure.

CEAC #2 i i o I was returned to operable status by re-initializino the system.

Followingt i i g i re-initializing, all CEAC 52 failure indications returned to nomal.

i I CEAC 42 was returned to operable status on all CPC channels.

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