05000334/LER-1980-019-03, /03L-0:on 800310,while Steam Flushing,Crack Found in Channel Head of Liquid Waste Evaporator Bottoms Heat Exchanger.Caused by Equipment Failure,Probably Due to Chloride Stress Corrosion.Sleeve Welded Over Channel Head

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/03L-0:on 800310,while Steam Flushing,Crack Found in Channel Head of Liquid Waste Evaporator Bottoms Heat Exchanger.Caused by Equipment Failure,Probably Due to Chloride Stress Corrosion.Sleeve Welded Over Channel Head
ML19305D809
Person / Time
Site: Beaver Valley
Issue date: 04/08/1980
From: Werling J
DUQUESNE LIGHT CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19305D782 List:
References
LER-80-019-03L, LER-80-19-3L, NUDOCS 8004150545
Download: ML19305D809 (2)
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LER-1980-019, /03L-0:on 800310,while Steam Flushing,Crack Found in Channel Head of Liquid Waste Evaporator Bottoms Heat Exchanger.Caused by Equipment Failure,Probably Due to Chloride Stress Corrosion.Sleeve Welded Over Channel Head
Event date:
Report date:
3341980019R03 - NRC Website
v • d • e

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OOCnifNbVMER 6d 63 EvtNT OATE to 75 RE' ORT O A TE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lTTTI l Liquid Waste Evaporator lines had been plugged due to insuf ficient flushing after l

pr77] l bottoms transfer. While steam flushing, a crack was found in a channel head of the i l o 14 I I Liquid Waste Evaporator bottoms heat exchanger. Because of the low pressure (less l

[TTTl I than 15 psic) during normal operation, it was felt that the fluid could be containedl ITTTl I within the Auxiliary Building even if a cross failure occurred and would be 1

["5'TTI I detected by sump level and radiation monitors.

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l stress corrosion since the unit handles water susceptable to chloride contamination I i

I g land concentrates it.

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l channel head of the heat exchanger since additional cracks appeared when weld l

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Attachment To LER 80-019/03L Beaver Valley Power Station Duquesne Light Company Docket No. 50-334 Event Description And Probable Consequencesoffsite implications would have been negligible.

Cause Description And Corrective Actionsmaterials that will be more compatible with the process fluid to preclude the more deleterious effect of corrosion. There have been no previous failures of this type.

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