ML19323B562

LER 80-030/03L-0:on 800407,during Preventive Maint,Low Flow Switch to Waste Disposal Sys Liquid Effluent Monitor RO-90-122 Found Inoperable.Caused by Small Particulate Matter in Liquid.Design Change Request Initiated

ML19323B562
Person / Time
Site:	Sequoyah
Issue date:	05/06/1980
From:	Mcgriff J TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19323B559	List: ML19323B558 ML19323B562
References
LER-80-030-03L-01, LER-80-30-3L-1, NUDOCS 8005130603
Download: ML19323B562 (1)

Text

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NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION l (7 771 ,

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• EVENT OfSCRIPTION AND PnCSASLE CONSEQUENCES

[5Tr1 lDuring performance of preventat ye maintenance, the 2ow flow switch to

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r3rp i aste W Disposal Sysi.em Liquid' Effluent Monitor RM-90-122 was found inoper- i i ,, i 4 , gable. To repair the switch, the monitor must be valved out. Action 27.to ;

F6 TO ILCO 3.3.3.9 was followed (no releases via this pathway) until the flow

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l g tswitch was returned operable 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and 9 minutes later. There was no io;,,ihazard to the public health and safety. Previous occurrences - one. I I

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ri;oilThe flow switch becomes inoperable when small particulate matter is in i githe liquid being monitored. A design change request has been initiated. i g

A preventative maintenance program, on a weekly schedule, has been ,

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