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Laser Welding of Seal Tube for Instrumented Irradiation Fuel Test  

Kim Soo-Sung (Dept. of Dry Process Nuclear Fuel Development, Korea Atomic Energy Research Institute)
Lee Chul-Yong (Dept. of Dry Process Nuclear Fuel Development, Korea Atomic Energy Research Institute)
Kim Woong-Ki (Dept. of Dry Process Nuclear Fuel Development, Korea Atomic Energy Research Institute)
Park Geun-Il (Dept. of Dry Process Nuclear Fuel Development, Korea Atomic Energy Research Institute)
Koh Jinh-Yun (Dept. of Materials Engineering, Korea University of Technology and Education)
Seo Jun-Seok (Reliability Assessment Center for Metallic Materials, Korea Inst. of Industrial Technology)
Publication Information
Journal of Welding and Joining / v.23, no.6, 2005 , pp. 43-48 More about this Journal
Abstract
This work was carried out to obtain sound welds and to select a most suitable binary metal joint among three different dissimilar binary metal combinations such as Zr-4/Ta, Mo/Ta and Ti/Ta(seal tube/sensor sheath) joints fur the instrumented nuclear fuel irradiation test. To do this, Taguchi experimental method was employed to optimize the experimental data. In addition, metallography, micro-focus x-ray radiography and hardness test were conducted to examine the welds. From the weld bead appearance, penetration depth and bead width as well as weld defects standpoint, Zr-4/Ta joint is suggested for the circumferential joining between a seal tube and a sensor sheath. The optimized welding parameters based on Zr-4/Ta joint are suggested as well.
Keywords
Dissimilar metals; Nd:YAG Laser welding; Metallography; Micro-focus X-radiography; Nuclear fuel irradiation test;
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