05000220/LER-1980-008-03, /03L-0:on 800315,during Steady State Operation, Alarm in Control Room Signaled Loss of Flow to Stack Gas Sampling Sys.Caused by Stack Sample Flow Inlet Valve Failing Closed,Due to Arcing Relay Contacts

/03L-0:on 800315,during Steady State Operation, Alarm in Control Room Signaled Loss of Flow to Stack Gas Sampling Sys.Caused by Stack Sample Flow Inlet Valve Failing Closed,Due to Arcing Relay Contacts

ML18037A245
Person / Time
Site:	Nine Mile Point
Issue date:	03/20/1980
From:	Falise M NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML17053B516	List: 05000220/LER-1980-008, Forwards LER 80-008/03L-0 05000220/LER-1980-008-03, /03L-0:on 800315,during Steady State Operation, Alarm in Control Room Signaled Loss of Flow to Stack Gas Sampling Sys.Caused by Stack Sample Flow Inlet Valve Failing Closed,Due to Arcing Relay Contacts
References
LER-80-008-03L, LER-80-8-3L, NUDOCS 8003310313
Download: ML18037A245 (2)

LER-1980-008, /03L-0:on 800315,during Steady State Operation, Alarm in Control Room Signaled Loss of Flow to Stack Gas Sampling Sys.Caused by Stack Sample Flow Inlet Valve Failing Closed,Due to Arcing Relay Contacts

Event date:
Report date:
2201980008R03 - NRC Website

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0 QB 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT OESCRIPTION AND PROBABLE CONSEQUENCES Q10 Durin stead state o eration, an alarm in the control room si nailed

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loss of flow to the stack gas sampling system.

Investigation revealed

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that the stack sample flow inlet valve had failed closed.

Environmental

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Technical Specification 2.4.4 requires a grab sample be taken every 24

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hours with the s stem out of service.

Since the s stem was onl down

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f'r four hours the effects on the environment were minimal.

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Investigation of the problem revealed that the relay contacts for the power operated valve were arcing.

Technicians adjusted the contacts to restore the system to service.

No future action is required.

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11 12 13 PERSONNEL INJURIES NUMBER DESCRIPTIONQ41 I ~00 0

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11 12 LOSS OF OR DAMAGETo FACILITYQ43 TYPE

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10 NAME QF PREPARER ichael J. Falise LOCATIONOF RELEASE Q NA 45 NRC USE ONLY 68 69 PHONE:

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