ML19208A104

LER 79-064/03L-0:on 790807,trips in Plant Protection Sys D Placed in Bypass to Investigate Oscillations in delta-T Power Indication.Caused by Cold Leg Temp Indication Oscillation.All Related Signal Connections Tightened

ML19208A104
Person / Time
Site:	Arkansas Nuclear
Issue date:	09/05/1979
From:	Shively C ARKANSAS POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19208A101	List: ML19208A100 ML19208A102 ML19208A103 ML19208A104 ML19208A105
References
LER-79-064-03L, LER-79-64-3L, NUDOCS 7909120572
Download: ML19208A104 (1)

Text

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'iPCHfG.Tf 80 EVE NT DE SC AipTION ANC PROB ADLE CONSEGL;ENCES 10 o 2 1 During Mode 1 operation, the PC trips in "D" PPS were placed in bypassi Io Ia1 i to investicate oscillations in the " Delta-T" pauer indication. Power i o 4 I ODeration was continued based on meeting the require _ments of Action I c s l Statement #2 of T.S. Table 3.3.-l. i e c I This occurrence is similar to LER 50-368/79-015. i o i l Reportable per T.S. 6.9.1.9b.

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> u I The " Delta-T" power calculation oscillation was due to a cold leg ,

t i lil I temoerature indication oscillation. An unrelated plant trip occurred i i during the investigation. The investigation continued during the i, ,! outace. All related sional connections were tightened and the con-

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