05000271/LER-1981-017-03, /03L-1:on 810629,containment Isolation Valve LRN-95 Failed to Close During Quarterly Surveillance.Caused by three-way Air Solenoid Failure to Exhaust Air Due to Dirt Plugging Port.Solenoid Was Cleaned,Tested & Returned to Sv

/03L-1:on 810629,containment Isolation Valve LRN-95 Failed to Close During Quarterly Surveillance.Caused by three-way Air Solenoid Failure to Exhaust Air Due to Dirt Plugging Port.Solenoid Was Cleaned,Tested & Returned to Svc

ML20009H561
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	07/28/1981
From:	Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20009H559	List: 05000271/LER-1981-017, Forwards LER 81-017/03L-1 05000271/LER-1981-017-03, /03L-1:on 810629,containment Isolation Valve LRN-95 Failed to Close During Quarterly Surveillance.Caused by three-way Air Solenoid Failure to Exhaust Air Due to Dirt Plugging Port.Solenoid Was Cleaned,Tested & Returned to Sv
References
LER-81-017-03L, LER-81-17-3L, NUDOCS 8108100243
Download: ML20009H561 (1)

LER-1981-017, /03L-1:on 810629,containment Isolation Valve LRN-95 Failed to Close During Quarterly Surveillance.Caused by three-way Air Solenoid Failure to Exhaust Air Due to Dirt Plugging Port.Solenoid Was Cleaned,Tested & Returned to Svc

Event date:
Report date:
2711981017R03 - NRC Website

text

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NRC FOIM 364 U. S. NUCLEA*3 CEGULATOOY COMMISSION LICENSEE EVENT REPORT LER 81-17/3L CONTROL SLCCK: l l

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4 60 81 DOCKET NUMSEh 6d 69 EVENT DATE 74 75 REPORT DATE 40 EVENT DESCRIPTION AND PROSA8LE CONSEQUENU.S O'o io;;; l Containment isolation valve LRW-95 failed to close per Tech. Spec. 4.7.D.l. during i

o,3 i l quarterly surveillance at full power. The cause was determined to be a failure of f io i4l l the three way air solenoid. Valve LRW-94 was shut to provide containment isolation I io,3, i as per Tech. Spec. 3.7 D.2.

There were no consequences to public health and safety.1 t o t s 1 1 There were no previous occurrences of this type.

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l i i o l l The three way air solenoid failed to exhaust air due to dirt plunging the port I

i ii 1ii lwhich rendered the valve inoperable. The solenoid was cleaned. satinfactorfiv I

L'_J 1.1 l tested and returned to service.

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