05000316/LER-1979-041-03, Hydrogen Recombiner 1 Failed to Increase Temp to 1,200 F within 5-h.Caused by Incorrect Electrical Connection of One Heater Element.Wiring Corrected & Controller Gain & Bias Adjusted

Hydrogen Recombiner 1 Failed to Increase Temp to 1,200 F within 5-h.Caused by Incorrect Electrical Connection of One Heater Element.Wiring Corrected & Controller Gain & Bias Adjusted

ML17331A180
Person / Time
Site:	Cook
Issue date:	06/02/1980
From:	Wizner D INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17331A177	List: 05000316/LER-1979-041-03, Hydrogen Recombiner 1 Failed to Increase Temp to 1,200 F within 5-h.Caused by Incorrect Electrical Connection of One Heater Element.Wiring Corrected & Controller Gain & Bias Adjusted 05000316/LER-1980-022, Forwards LER 80-022/03L-0 & Updated LER 79-041/03L-1 05000316/LER-1980-022-03, /03L-0:on 800503,radiation Monitor R-11 Alarmed During Normal Operation.Sample Pump for R-11 & R-12 Would Not Remain Running.Caused by Wear of Pump.Pump Replaced & Air Sampler Tested.Entire Sys Will Be Replaced
References
LER-79-041-03L, LER-79-41-3L, NUDOCS 8006050315
Download: ML17331A180 (2)

LER-1979-041, Hydrogen Recombiner 1 Failed to Increase Temp to 1,200 F within 5-h.Caused by Incorrect Electrical Connection of One Heater Element.Wiring Corrected & Controller Gain & Bias Adjusted

Event date:
Report date:
3161979041R03 - NRC Website

text

UPDATE REPORT PREVIOUS REPORT DATE 11/03/79 LICENSEE EVENT REPORT BLOCK:

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8 60 61 DOCKET NUMBER 68 69 EVENT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10 DURING SURVEILLANCE TESTING HYDROGEN RECOMBINER NO.

1 FAILED TO INCREASE

~03 TEMPERATURE TO >1200 F-WITHIN 5 HOURS AS REQUIRED BY T.S. 4.6.4.2B3.

SIX HOURS WERE REQUIRED TO REACH THAT TEMPERATURE.

ONCE THE TEMPERATURE WAS REACHED'T WAS MAINTAINEDAS REQUIRED.

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2 RECOMBINER TESTED

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THIS IS THE FIRST OCCURRENCE OF THIS TYPE.

PUBLIC HEALTH AND SAFETY WERE NOTAFFECTED.

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QO" 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 027 CAUSE OF THE EVENT WAS INCORRECT ELECTRICAL CONNECTION OF ONE HEATER 3

ELEMENT WHICH RESULTED IN A RESISTANCE IMBALANCE BETWEEN PHASES, THE WIRING WAS CORRECTED AND THE CONTROLLER GAIN AND BIAS WERE ADJUSTED.

THE UNIT WAS RETESTED AND TEMPERATURE EXCEEDED 1200 F IN 4 HOURS, 4

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