ML20086D814

AO 73-06:on 730302,chemist,while Attempting to Draw Offgas Sample,Discovered Improper Flow Through Offgas Sample/ Monitoring Sys.Caused by Two Lines to Sys Rolled During Mods Made During Plant Outage

ML20086D814
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	03/02/1973
From:	Riley B VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086D809	List: ML20086D806 ML20086D814
References
AO-73-06, AO-73-6, VYV-2480, NUDOCS 8312050135
Download: ML20086D814 (1)

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7g VERMONT YANKElc NUCLEAR POWER ObRPORATION seventy esvem onove svarcr RUTt.AND, VERMONT 0370L Viv - 2480

• o. sov is7 VCRNON. VERMONT 093s4 March 2, 1973 United States Atomic Br.svgy Crnmelselon laineto ate of Eagalatory Optrations, F.931on 1 97"> Broad Street Nevark. New Jersey C7102 l

REl'EkENCE: Operating Licecae DPP-28 Dociet Nee. 50-271 Abnom al Occurrsote No. A0-73-06 Ger.tle.nen :

Aa dGfinSd by TBehnical Sp2cifications for th3 Vernent '/ar}tet Puelear Fowar Sta*. ton, Section f,.7.4.c, va are reporcing the follooring Abncrual Cccurrence as AC-73-05 att confituing our telephcna converentio:-

with your office.

At apptcS.fmetely 0800 on Hart.h 2 darir.g a plant startup and power ascenion, a chamist while attempting to draw an off-gas sample dia-covered that there vaa impropar flow through the off-Esa sample / monitoring systema. This ircperability of the cff-gas monitoring eyeten er.ceeds the Lin.iting Condition for Opsration as d6 fined by Saction 3.S.A.1 of i

Technical Spacification.. 1hs subject section t~equires that at laaet en off-gae monitorin; system ts opsrable at all t.imes. The rea: tor was-operating at 47% p w ar at ths tina of this incide:t with a stack gas.

dischstgs r+te of ap;roximately 600 p01/sec.

Investigation revealed that two 11nsa going to tha cff-gas monitoring system had bson rolled during system modificatf or.a made during the last plant outage. Sin:o Technical Sp2cification Sectiors 3.8.A.2 Er.3 vare not being exceehd at 47% rever leval, ne red'.setion of power was necessary, Tha srystem was repstred, checked out, ar.d placed tack in eparation by

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Very cru3y yours.

VERMOMT YAFKE8 DU% BAT. POWER CGFOMTIM k

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