05000325/LER-1980-050-03, /03L-0:on 800605,while Performing Reactor Bldg Ventilation Radiation Monitoring Sys Test,Monitor D12-RM-N010B Failed to Trip Ventilation Sys & Start Standby Gas Trains.Caused by Stuck Relay 3BA

/03L-0:on 800605,while Performing Reactor Bldg Ventilation Radiation Monitoring Sys Test,Monitor D12-RM-N010B Failed to Trip Ventilation Sys & Start Standby Gas Trains.Caused by Stuck Relay 3BA

ML19318D033
Person / Time
Site:	Brunswick
Issue date:	06/27/1980
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19318D032	List: 05000325/LER-1980-050, Forwards LER 80-050/03L-0 05000325/LER-1980-050-03, /03L-0:on 800605,while Performing Reactor Bldg Ventilation Radiation Monitoring Sys Test,Monitor D12-RM-N010B Failed to Trip Ventilation Sys & Start Standby Gas Trains.Caused by Stuck Relay 3BA
References
LER-80-050-03L, LER-80-50-3L, NUDOCS 8007070237
Download: ML19318D033 (1)

LER-1980-050, /03L-0:on 800605,while Performing Reactor Bldg Ventilation Radiation Monitoring Sys Test,Monitor D12-RM-N010B Failed to Trip Ventilation Sys & Start Standby Gas Trains.Caused by Stuck Relay 3BA

Event date:
Report date:
3251980050R03 - NRC Website

text

_ - -_______________

1.lCENSEE EVENT REPORT O

CONTROL BLOCK: l*

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l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

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7 8 9 UCENSEE CODE 14 15 LICENSE NUMBER 25 LICENSE TYPE JO Si CAT 68 con'T

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8 60 St DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT D8!SCRIPTION ANO PROBABLE CONSEQUENCES h a 2 l While performing PT 4.1.1, Reactor Building Ventilation Radiation Monitorine Svstem l

y 3 l Test, radiation monitor D12-RM-N010B failed to trip the ventilation system and start I

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l the standby gas trains. D12-RM-N010A was tested satisfactorily during this PT.

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l l Technical Specifications 3.3.2, 6.9.1.9b l

, 3 80 7

• 8 9 SYSTEM

CAUSE

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37 40 di 42 43 44 47 CAUSE DESCRIPTIO*' APO CORRECTIVE ACTIONS h g l Relay 3BA was found to teru.echanically stuck in the nonalarm. position, thus preventing l l the tonitor from properly working. The relay was replaced from stock and the i

r l instrument tested satishetorily,- As this instrument 1.s. checked monthly and does not l i 7 l have a history :f failure, this is considered an isclared.cvent.

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8 9 80

$iEOERY

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DISCOVERY DESCRIPTION 1

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1. TlVITY CO TENT F:ELEASED OP RELEASE AMOUNT OF ACUVITY LOCATION OF RELEASE

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8 9 10 ft 44 45 R0 PERSONNEL EXPOSURES kJUM8E R DESCRIPTION 39 l 0 l 0 l 0 lhlTYPEZ lhl NA l

t 7 PE RSONN A'iN;ULS DESCRiPnC~@

NUMBER l 0101 Ol@l NA l

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7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY Q TYPE

DESCRIPTION

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80 07070 M7 NRC USE ONW l

ISSUE NA l

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2 O j' 7 8 9 IO 68 69 80 1; A. C. Tollison, Jr.

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NAME OF PREPARER