ML19323G648

LER 80-050/03L-0:on 800505,flow Switches FS-90-225 & FS-90-134 Found Inoperable,Which Resulted in Placing Plant Into Action 29.Caused by Debris Collecting on Flow Switch, Preventing Actuation.Switch Cleaned & Returned to Svc

ML19323G648
Person / Time
Site:	Sequoyah
Issue date:	06/02/1980
From:	Hereford J TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19323G644	List: ML19323G642 ML19323G648
References
LER-80-050-03L, LER-80-50-3L, NUDOCS 8006060416
Download: ML19323G648 (2)

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[TT 1 i Flow switches FS-90-225 and FS-90-134 (Condensate Demin. Effluent an_d 1, 8I Essential Raw Cooling k'ater Effluent Monitorelwere found..inspetable ]

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[g,g Eswitches _ provide low flow alarm to_the operator. There was no dang g i gpj; to the health and safety of the public. Previous occurrences - Three.

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[ pq l Debris collects on flow switch and prevents switch actuation. The switch j

, , was immediately cleaned and returned to operable status. A Design Change !

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, , i Request has been initiated to correct the problem.  !

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o EVALUATION LOGIC FOR PART 21 SQRO-50-327/

Originating Document No. 80050_and PRO' 1-80-107 &

Yes Eo 1-80-108 I. Deficiency of a plant necurity system? X

1. Could defect create a substantial safety hazard? X If yes, report as part 21.

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II. Is the component necessary to ensure: -

1. The integrity of the reactor coolant boundary? X

2. The capabili ty to shut down reactor and maintain it in a safe shutdown condition? X

3. The capability to prevent or mitigate the consequences of accidents which could result in potential cffsite exposure comparable to those referred to in 10 CFR 100.117 X

't III. Is defect in a basic component one that has been accepted for ownership? X Installed for une or operation? X If a yes in II and III above, could defect create a substantial safety hazard? X If yes, report as part 21.

IV. Is defect in a baste component:

A condition that could contribute to exceeding of safety limit? X If yes to one of II and IV above, report as part 21.

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