ML20008E742

LER 81-007/03L-0:on 810205,Torus-RB Vacuum Breaker Differential Pressure Indicating Switch 16-19-324,model 288, Actuated Above Tech Spec Limit.Caused by Setpoint Drift. Switch Exercised,Reset & Returned to Svc

ML20008E742
Person / Time
Site:	Vermont Yankee
Issue date:	03/04/1981
From:	Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20008E738	List: ML20008E737 ML20008E742
References
LER-81-007-03L, LER-81-7-3L, NUDOCS 8103090553
Download: ML20008E742 (1)

Text

F U. S. NUCLEAD RESULATCOY COMMISSION NRC FORM 364 G.77)

LICENSEE EVENT REPORT LER 81-07/3L CONTnOLsLOCx:l i

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REPORT DATE 80 I e 60 61 QQCKET NUMSER 6d 69 EVENT DATE EVENT DESCRIPTION ANO PROBA8LE CONSEQUENCES O'o Iol2l l During surveillance testing, Torus-RB Vacuum Breaker AP switch DPIS 16-19-32A act- l io,3, l uated at 0.504 psid and was above the T. S. 3.7. A.5.a limit of < 0.5 psid. The l 10 l A ; l switch was immediately reset. Redundant switch DPIS 16-19-32B tested within limits l lois1 1 and was available. Based on the above, there were no odverse consequences to the l l 0 l6 ] l public health and unfety. There were no previous reportable occurrences of this l 1017 I I type. I 10144 1 s0 7 e, E CQ E SUSC E COMPONENT CODE SUSCODE S E l0l9l lIlBl@ @ l Z l@ lI l N l S l T l R l Ul@ l S j@ l Z l@

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42 43 44 47 CAUSE DESCRIPTIO% AND CORRECTIVE ACTIONS l i l o l l The event was due to setpoint drif t on the Barton Model 288 Dif ferential Pressure l I i i i i l Indicating Switch. The switch was exercised. reset, and returned to service. I l i 121 l I I

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[f 810309055J NAME OF P9EPARER anen P. Wrphy PHONE: (802) 257-7711 i ;

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