05000368/LER-1979-098-03, /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

/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: 05000368/LER-1979-098-03, /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 05000368/LER-1979-099-03, /03L-0:on 791205,during Mode 1 Operation,Outer Door of Emergency Personnel Airlock Found Partially Open.Caused by Mechanical Timing Being Out of Synchronization.Adjustments Made & Door Declared Operable ML19257B320
References
LER-79-098-03L, LER-79-98-3L, NUDOCS 8001150580
Download: ML19257B336 (1)

LER-1979-098, /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

Event date:
Report date:
3681979098R03 - NRC Website

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 l l l l l lh (PLEASE PRINT OR TYPE Alt, REQUIRED INFORMATION) l A]R l Al Nj 0 l 2 l@15l 0 j0 l -l0 l 0 l 0l 0l 0 l-l 0 l0 lgj4 l1 l 1 l1 l 1 lg[ j lg O i 9

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8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 NFPORT DATE 80 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.

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

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