ML20028E782

LER 82-051/03L-0:on 821223,while at 100% Power,Plant Computer Malfunctioned & Declared Inoperable.Caused by Defective Analog Sys Driver Card,Ibm Part 5800013.Card Replaced & Computer Operation Restored

ML20028E782
Person / Time
Site:	Millstone
Issue date:	01/21/1983
From:	Stadnick S NORTHEAST NUCLEAR ENERGY CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20028E766	List: ML20028E765 ML20028E782
References
LER-82-051-03L, LER-82-51-3L, NUDOCS 8301280193
Download: ML20028E782 (1)

Text

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EVENT DESCRIPTION AND PROSABLE CONSEQUENCES h o 2 l While at 100% power, the plant computer nm1 functioned and was declared incoerable. I I

g i peration O continued per TSAS 3.2.1 and 3.1.3.3.d for a 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> oeriod.

• Power was re-I g i duced and core power distribution was monitored with excore detectors per TSAS g l 4.2.1.2. Similar events82-017, 81-009,80-008, 79-020,79-005, 78-027,78-021, I I

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 i o 1The cause was traced to a defective analoa system driver card. TRM Part Nn_ 5800013. I i i lThe card was replaced and computer operation restored in 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />. No further correct- I I

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