05000368/LER-1980-041-03, /03L-0:on 800610,during Mode 1 Operation,Plant Computer Was Taken Out of Svc Rendering COLSS Inoperable. Computer Was Taken Out of Svc to Troubleshoot Problem Re CRT Displays.Backup Plant Computer Will Be Installed

/03L-0:on 800610,during Mode 1 Operation,Plant Computer Was Taken Out of Svc Rendering COLSS Inoperable. Computer Was Taken Out of Svc to Troubleshoot Problem Re CRT Displays.Backup Plant Computer Will Be Installed

ML19320C026
Person / Time
Site:	Arkansas Nuclear
Issue date:	07/09/1980
From:	Pendergraft R ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19320C014	List: 05000368/LER-1980-041, Forwards LER 80-041/03L-0 05000368/LER-1980-041-03, /03L-0:on 800610,during Mode 1 Operation,Plant Computer Was Taken Out of Svc Rendering COLSS Inoperable. Computer Was Taken Out of Svc to Troubleshoot Problem Re CRT Displays.Backup Plant Computer Will Be Installed
References
LER-80-041-03L, LER-80-41-3L, NUDOCS 8007150660
Download: ML19320C026 (1)

LER-1980-041, /03L-0:on 800610,during Mode 1 Operation,Plant Computer Was Taken Out of Svc Rendering COLSS Inoperable. Computer Was Taken Out of Svc to Troubleshoot Problem Re CRT Displays.Backup Plant Computer Will Be Installed

Event date:
Report date:
3681980041R03 - NRC Website

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NRC FORM 366 U. S. NUCLE AR REGUL ATORY COMMISSION

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8 60 61 DOCEET hum 8gn 68 69 EVENT DATE 74 75 H PoH1 DATE tc EVENT DESCRIPTION AND PROB ABLE CCNSEQUENCES Oio 1o62: 1 During Mode 1 operation, the plant computer was taken out of service i

toi3i i rendering COLSS inoperable.

Action was initiated to reduce reactor poweri soiA i i to bring the Core Protection Calculators' indicated DNBR and LPD values inis,i within limits per Tech. Spec. Figures 3.2-1 and 3.2-3.

There have been i

io1611 no similar occurrences.

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4, CAUSE DESCRIPTION AND CORREC OVE ACTIONS 27 liioi i The Dlant computer was intentionally taken out of service to troubleshoot; iii,ii a problem related to the CRT displays.

Following the computer maintenanc9 I activities, the plant computer was returned to service.

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