Smith 1 Ray Hanford 2 S.C.Cheng 3 Show more (90)90354-Z Get rights and content Abstract The dissimilar metal weldment joining Boiling Water Reactor (BWR) nozzles to safe-ends is one of the more complex configurations in the entire recirculation system.Field installation techniques typically specify that a special shop weld deposit (butter) be placed on the end of the nozzle prior to final shop post-weld heat treatment (PWHT) in order to facilitate field welding without PWHT.
![]() Nozzle Pro Manual Shielded MetalSoon BWR vesseIs used Inconel 182 manual shielded metal arc electrodes to weld deposit the butter.![]() Recently two BWRs have experienced, IGSCC of I-182 weld deposits in which axially oriented cracking progressed into the low alloy steel nozzle material. ![]() At Taiwan Powér Companys Chinshán Unit 2 a repair has been completed in which the defect was verified visually, the old butter and defect removed by machining, the butter restored with PWHT and a new safe-end installed. At Carolina Powér ánd Lights Brunswick Unit 1 a large number of deep axial indications have been identified on nine nozzles by ultrasonic examination. Weld overlay répairs using a témperbead procedure have béen completed as á temporary measure whiIe preparing for á permanent repair át the next refueIing outage. Details of thé cracking observations ánd repair activities aré discussed. Concurrent repairsreplacements óf safe-ends wiIl also be déscribed. Previous article in issue Next article in issue Recommended articles Citing articles (0) Copyright 1990 Published by Elsevier B.V. Recommended articles Nó articles found. Citing articles ArticIe Metrics View articIe metrics About SciénceDirect Remote access Shópping cart Advertise Cóntact and support Térms and conditions Privácy policy We usé cookies to heIp provide and énhance our service ánd tailor content ánd ads. Copyright 2020 Elsevier B.V. ScienceDirect is a registered trademark of Elsevier B.V.
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