05000368/LER-1979-038-03, Steam Generator a Pressure Indicator 2PI-1041-4N,on Channel D Primary Power Sys,Failed High.Cause Undetermined.Manufacturer Analysis Indicated Several Electronic Components Below Specs

Steam Generator a Pressure Indicator 2PI-1041-4N,on Channel D Primary Power Sys,Failed High.Cause Undetermined.Manufacturer Analysis Indicated Several Electronic Components Below Specs

ML19323F309
Person / Time
Site:	Arkansas Nuclear
Issue date:	05/21/1980
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19323F301	List: 05000368/LER-1979-038, Forwards Updated LER 79-038/03X-1
References
LER-79-038-03X, LER-79-38-3X, NUDOCS 8005280751
Download: ML19323F309 (1)

LER-1979-038, Steam Generator a Pressure Indicator 2PI-1041-4N,on Channel D Primary Power Sys,Failed High.Cause Undetermined.Manufacturer Analysis Indicated Several Electronic Components Below Specs

Event date:
Report date:
3681979038R03 - NRC Website

text

Q UPDATE REPORT - PREVIOUS REPORT DATE 6/26/79 NRC PORM 3E4 U.S. NUCLE AR RECULATORY COMMISSION LICENSEE EVENT REPORT EXHIBIT A CONTROL BLOCK: l l l 1 i Uh (PLE ASE P'llNT OR TYPE ALL REQUIRED ONFORMATION)

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E POR T D AT E 80 EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h riTT1 I During Main Steam Safety Valve testino. Mode 3 operation. the "A" Steam i f5TO i Generator pressure indicator, 2PI-1041-4N, on Channel "D" PPS failed hight l The low pressure and high SG differential pressure trips were bypassed per o.

o s i T.S. Table 3.3-1 Action #2 for the RPS and per T.S. Table 3.3-3 Action #91 o s i for ESFAS (MSIS & EFAS). The remaining indicators remained operable. Not toJ__Jl similar occurrences.

Reportable per T.S. 6.9.1.9.b.

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43 as er CAUSE DESCR.pTICN ANO CORREC flVE ACTIONS 27 l Investiaation revealed that the electronic cortion of the transmitter i

i o i,i,iiwould fail intermittantly.

The affected electronic cards were replaced i

iand returned to the manufacturer for analysis.

Analysis indicated several

, 2 1 components below specifications; however, a mode of failure could not be i

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