05000293/LER-1983-021-03, /03L-0:on 830411,during Surveillance Test 8.7.4.3, Primary Containment Isolation Valve AO-5033B Failed to Meet 10-s Closing Time Requirements.Caused by Lubricant Infiltrating Solenoid Valve Components.Components Replaced

/03L-0:on 830411,during Surveillance Test 8.7.4.3, Primary Containment Isolation Valve AO-5033B Failed to Meet 10-s Closing Time Requirements.Caused by Lubricant Infiltrating Solenoid Valve Components.Components Replaced

ML20023D067
Person / Time
Site:	Pilgrim
Issue date:	05/09/1983
From:	Brixey P BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20023D063	List: 05000293/LER-1983-021, Forwards LER 83-021/03L-0 05000293/LER-1983-021-03, /03L-0:on 830411,during Surveillance Test 8.7.4.3, Primary Containment Isolation Valve AO-5033B Failed to Meet 10-s Closing Time Requirements.Caused by Lubricant Infiltrating Solenoid Valve Components.Components Replaced
References
LER-83-021-03L, LER-83-21-3L, NUDOCS 8305190181
Download: ML20023D067 (2)

LER-1983-021, /03L-0:on 830411,during Surveillance Test 8.7.4.3, Primary Containment Isolation Valve AO-5033B Failed to Meet 10-s Closing Time Requirements.Caused by Lubricant Infiltrating Solenoid Valve Components.Components Replaced

Event date:
Report date:
2931983021R03 - NRC Website

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EVENT DESCRIPTION AND PRO 8ABLE CONSEQUENCES h o2 l While performina surveillance test No. 8.7.4.3. orimary containment isolation I

lo l2 l l valve (N2 System) A0-50338 failed to meet the closing time requirements of 10 l

j o l4 l [ seconds. Redundant isolation was established and an investigation and repair I

fo ls l l was initiated. This event caused no threat to public health and safety.

l lo le]l A similar event was reported under LER 82-033 dated 9/15/82.

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l Lubricant from A0-5033B air operator infiltrated the air solenoid valve causing l i o lili ll the resilient components to swell and cause a partial blockage of the solenoid I

i 2 l valve exhaust port. The resilient parts of the solenoid valve were replaced.

I l the valve tested satisfactorily and the system declared operable. The surveil-l i a lil4ll lance frequenc_y has been chanced to once Der week. See Attachment I

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CAUSE

Lubricant from A0-50338 air operator infiltrated the air solenoid valve causing the resilient components to swell creating a partial blockage of the exhaust port. These resilient parts were replaced, the valve timed satisfactorily and the system made operable. The test frequency has been temporarily changed to once per week to ensure that the lubricant is no longer affecting the operation of the solenoid valve. The test frequency will be returned to normal when this assurance has been made.

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