ML19320A882

LER 80-033/03L-0:on 800530,during Mode 1 Operation,Plant Protection Sys C High S/G Delta P Trip Was Bypassed.Caused by Failed Power Supply on Bistable Card.Bistable Card Replaced & Plant Protection Sys Tested

ML19320A882
Person / Time
Site:	Arkansas Nuclear
Issue date:	06/27/1980
From:	Pendergraft R ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19320A877	List: ML19320A876 ML19320A882
References
LER-80-033-03L, LER-80-33-3L, NUDOCS 8007080166
Download: ML19320A882 (1)

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' EVENT DESCRIPTION AND PROBABLE CONSEQUENCESh'r 1o 1211 Durina' Mode 1 coeration. the "C"'PPS hiah S/G delta P trip was bypassed. I o 3 i Channels "A", "'", o and "D" remained operable with the reactor trip logic i t o i. i i in a 2 out of 3 trip ' sequence. There have been no similar occurrences. I p i s i r Reportable per Tech. Spec. 6.9.1.9(t _ i Ic is I l i

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i,i j l Investigation revealed a failed power supply on the Listable card. The i isi j I bistable card was replaced and the PPS channel was testeo and returned ,

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