ML20003G209

Updated LER 81-006/03L-1:on 810127,ATWS Recirculation Pump Trip High Pressure Trip Points from PT-2-3-56Bm,56Cm & 56Dm Were Thought to Trip High.Investigation Disclosed Conversion Error.Instruments Were within Range.Rept Unnecessary

ML20003G209
Person / Time
Site:	Vermont Yankee
Issue date:	04/21/1981
From:	Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20003G208	List: ML20003G207 ML20003G209
References
LER-81-006-03L, LER-81-6-3L, NUDOCS 8104280475
Download: ML20003G209 (1)

Text

NRC FC:M :,64 U. S. NUCLEAR REGULATO*.Y COMMISSION [

J.") UPDATE REPORT - PREVIOUS REPORT DATE 022581 '-;

/ \ LICENSEE EVENT REPORT LER 81-06/3L

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OATE 80 EVENT CESCRIPTION AND #RCS A8LE CONSECUENCES h lol2l l During normal operation while performing surveillance testing per 0.P. 4342 the I g l ATUS/RPT high pressure trip points ' rom PT-2-3-56Bm, 56Cm, & 56Dm were thought to l lojalltrip 1 to 2 psi higher than allou d in Tech. Spec. Table 3.2.1. l Io is! ! I la is 1 I l ,

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CAUSE CESCRIPTICN AND CCARECTIVE ACTIONS @

l i i o i I Further review of this incident has disclosed that there was an error in convertine ! -

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i,#2l l the pressure disclosed that all the instruments were within the allowable pressure I li13l lrance and therefore, should not have been reported. The procedure has been changed ]

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$ 3 'G 5J o9 30 3 NAME Cp maEPARER Warren P. Murphy PucN E.

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