ML19257B336

LER 79-098/03L-0:on 791205,during Mode 1 Operation,Received Sensor Failure Alarms from Core C Protection Calculator. Caused Not Determined.Core Protection Calculator Program Reloaded & Sys Restored to Operation

ML19257B336
Person / Time
Site:	Arkansas Nuclear
Issue date:	01/09/1980
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19257B321	List: ML19257B320 ML19257B329 ML19257B336
References
LER-79-098-03L, LER-79-98-3L, NUDOCS 8001150580
Download: ML19257B336 (1)

Text

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9 NRC FORM 366 U. 5. NUCLE AR REGULATORY COMMISSION (7 773 LICENSEE EVENT REPORT EXHIBIT A CONTROL Blocs (: l (PLEASE PRINT OR TYPE Alt, REQUIRED INFORMATION) l l l l l lh 7

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l9 A]RLeCENSEE l Al CODE Nj 0 l 2 l@15l 0 j0 lLaCENSE 14

-l0 lNUM8ER 0 l 0l 0l 0 l- l25 0 l0 lgj4 26 l1 l 1 l1 l b)1CATSs LICK NSE tvFL J0 lg[ j lg CON'T o i "'"?,"e!

,U [L_J@l0 l 5 p l0 ] 013 l 61 8 lgl1 l 2 ; O 5 17 l 9 lgl0 75 l 1l0 l 9 l8 l 0 lg 80 i 8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 NFPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h frTTl I During Mode 1 operation, sensor failure alaims from the "C" g rrr i1 i Core Protection Calculator were received. All status words and ,

ioi.,j remaining CPC Channels were verified normal. The CPC ,

iei3i [ Channel "C" was declared inoperable. Other occurrences involving i C . l the "C" CPC are LER's 50-368/79-096 6 79-015. Similar occurrences ,

g i are LER's 50-368/79-045,79-015, 79-011, 6 79-006. ,

ic91i Reportable per T.S.6.9.1.9.b. t

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[,Njg [ NJ @ SUhP@ Cl4l9l0[g 41 44 43 44 as CAUSE DESOLATION AND CORRECflVE ACTIONS h i O I Cause of failure could not be determined and is believed ,

g to be non-repetitive. The CPC program was reloaded

, 2 i and the systen was restored to operational status. ,

3 i The recuirements of Action Statement T.S. Table 3.3-1  ;

,i. 1 #2 were met. i C

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