Analysis of Overlay Weld Effect on Preventing PWSCC in Dissimilar Metal Weld

被引：1

作者：

Lee, Seung-Gun ^{[1
]}

Oh, Chang-Kyun ^{[1
]}

Park, Heung-Bae ^{[1
]}

Jin, Tae-Eun ^{[1
]}

机构：

[1] KOPEC Korea Power Engn Co Inc, Power Engn Res Inst, Yongin, South Korea

来源：

TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS A | 2010年 / 34卷 / 01期

关键词：

Dissimilar Metal Weld; Residual Stress; PWSCC; Overlay Weld; Finite Element Analysis;

D O I：

10.3795/KSME-A.2010.34.1.97

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

PWSCC(Primary Stress Corrosion Cracking) in Alloy 82/182 butt welds is the problem affecting safety and integrity of nuclear power plant. PWSCC can be occurred in the area that is at high magnitude of tensile residual stress, such as Alloy 82/182 dissimilar metal welds in PZR(pressurizer) nozzles. There have been a number of incidents recently at the dissimilar metal welds in overseas nuclear power plants. Overlay weld is the one of the effective methods to decrease tensile residual stress of inside surface, which will result in preventing PWSCC. In this paper, overlay weld conditions on the purpose of preventing PWSCC was explained and the benefit of the overlay weld was confirmed performing finite element analysis.

引用

页码：97 / 101

页数：5