05000364/LER-1981-040-03, /03L-0:on 810923,plant Stack Effluent Monitor Found Inoperable Due to Data Transmit Error.Inverter 2A tripped,de-energizing Bus 24.Cause of Transmit Error Not Determined.Inverter Trip Caused by Transient Voltage Spike

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/03L-0:on 810923,plant Stack Effluent Monitor Found Inoperable Due to Data Transmit Error.Inverter 2A tripped,de-energizing Bus 24.Cause of Transmit Error Not Determined.Inverter Trip Caused by Transient Voltage Spike
ML20011A737
Person / Time
Site: Farley 
Issue date: 10/16/1981
From: Hairston W
ALABAMA POWER CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20011A734 List:
References
LER-81-040-03L-01, LER-81-40-3L-1, NUDOCS 8110290367
Download: ML20011A737 (1)
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LER-1981-040, /03L-0:on 810923,plant Stack Effluent Monitor Found Inoperable Due to Data Transmit Error.Inverter 2A tripped,de-energizing Bus 24.Cause of Transmit Error Not Determined.Inverter Trip Caused by Transient Voltage Spike
Event date:
Report date:
3641981040R03 - NRC Website
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6C di OCCAET NUMSEA 64 63 EV ENT CATE 74 75 MPCR T C ATE 30 EVENT CEsCalPTICN AND PRC8ABLE CCNSEOUENCES th a1: t i At 1940 on 9/23/81, the plant stack effluent monitor (R29B) was declared inoperable due J

3 i; j j to a data transmit error. At 2235 on 9/23/81, the 120 VAC vital bus 2A was deenergized o,,3 j j when inverter 2A tripped. Tech. Spec. 3.3.3.1, in part, requires R29B to be operable, g

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i o i l The cause for the transmit error on R29B was being investigated at the time the 2A y

As a result of loss of power to 'he consoles the cause for the trans-ij l inverter tripped.

t mit error could not be determined. The inverter tripped due to a transient voltage spike I

l and was reset and returned to service at 0010 on 9/24/81.

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