Welding overlay analysis of dissimilar metal weld cracking of feedwater nozzle

被引：6
|
作者：
Tsai, Y. L. [1 ,2 ]
Wang, Li. H. [2 ]
Fan, T. W. [2 ,3 ]
Ranganath, Sam [2 ]
Wang, C. K. [4 ]
Chou, C. P. [1 ]
机构：
[1] Natl Chiao Tung Univ, Dept Mech Engn, Hsinchu 30010, Taiwan
[2] Ind Technol Res Inst, Hsinchu 310, Taiwan
[3] Chung Hua Univ, Dept Civil Engn & Engn Informat, Hsinchu 300, Taiwan
[4] Taiwan Power Co, Taipei 100, Taiwan
来源：
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING | 2010年 / 87卷 / 01期
关键词：
Feedwater nozzle; Alloy; 182; Weld; ASME; FEM;
D O I：
10.1016/j.ijpvp.2009.11.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Inspection of the weld between the feedwater nozzle and the safe end at one Taiwan BWR showed axial indications in the Alloy 182 weld. The indication was sufficiently deep that continued operation could not be justified considering the crack growth for one cycle. A weld overlay was decided to implement for restoring the structural margin. This study reviews the cracking cases of feedwater nozzle welds in other nuclear plants, and reports the lesson learned in the engineering project of this weld overlay repair. The overlay design, the FCG calculation and the stress analysis by FEM are presented to confirm that the Code Case structural margins are met. The evaluations of the effect of weld shrinkage on the attached feedwater piping are also included. A number of challenges encountered in the engineering and analysis period are proposed for future study. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：26 / 32
页数：7
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