05000263/LER-1982-004, Updated LER 82-004/01T-1:on 820410,inboard & Outboard 18-inch Dyrwell Vent Valves Failed to Close Upon Hand Switch Activation.Probably Caused by Solenoids Being Mounted Horizontally & Residual Core Magnetism.Solenoids Replaced

Updated LER 82-004/01T-1:on 820410,inboard & Outboard 18-inch Dyrwell Vent Valves Failed to Close Upon Hand Switch Activation.Probably Caused by Solenoids Being Mounted Horizontally & Residual Core Magnetism.Solenoids Replaced

ML20053C596
Person / Time
Site:	Monticello
Issue date:	05/20/1982
From:	Wojchouski A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20053C594	List: 05000263/LER-1982-004, Updated LER 82-004/01T-1:on 820410,inboard & Outboard 18-inch Dyrwell Vent Valves Failed to Close Upon Hand Switch Activation.Probably Caused by Solenoids Being Mounted Horizontally & Residual Core Magnetism.Solenoids Replaced
References
LER-82-004-01T, LER-82-4-1T, NUDOCS 8206020364
Download: ML20053C596 (1)

LER-2082-004, Updated LER 82-004/01T-1:on 820410,inboard & Outboard 18-inch Dyrwell Vent Valves Failed to Close Upon Hand Switch Activation.Probably Caused by Solenoids Being Mounted Horizontally & Residual Core Magnetism.Solenoids Replaced

Event date:
Report date:
2632082004R00 - NRC Website

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o 2 1 Dirine nrenarntion for n1 ant startun. inboard and outboard 18" drvwell 1 1

Io 131 l vent ulync ~; iled to close unon hand switch activation. Occurrence I o 4 I rnnnrtnh10 under Technien1 Snnci fient ion 6 'M 1. i . Yalves were opened 1 I

o s I rn11nting , vn,ctnr w r ,, en aninnrt rho drwn11 nnd worn nnintained I o o l in an open position for approximately 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> prior to attempting to g Icli1 I close. No previous similar reportable events. No effect en public health j iois 1 l or safety.

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