Long-Term Integrity of Waste Package Final Closure for HLW Geological Disposal, (II) : Applicability of TIG Welding Method to Overpack Final Closure
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概要
- 論文の詳細を見る
Overpack, a high-level radioactive waste package for geological disposal, seals vitrified waste and in line with Japan’s waste management program is required to isolate it from contact with groundwater for 1,000 years. In this study, TIG (Tungsten Inert Gas) welding method, a typical arc welding method and widely used in various industries, was examined for its applicability to seal a carbon steel overpack lid with a thickness of 190 mm. Welding conditions and welding parameters were examined for multi-layer welding in a narrow gap for four different groove depths. Weld joint tests were conducted and weld flaws, macro- and microstructure, and mechanical properties were assessed within tentatively applied criteria for weld joints. Measurement and numerical calculation for residual stress were also conducted and the tendency of residual stress distribution was discussed. These test results were compared with the basic requirements of the welding method for overpack which were pointed out in our first report. It is assessed that the TIG welding method has the potential to provide the necessary requirements to complete the final closure of overpack with a maximum thickness of 190 mm.
- 社団法人 日本原子力学会の論文
- 2005-06-25
著者
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ARITOMI Masanori
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
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ASANO Hidekazu
EBS Technology Research Project, Radioactive Waste Management Funding and Research Center
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Asano Hidekazu
Ebs Technol. Res. Project Radioactive Waste Management Funding And Res. Center Pacific Marks Tsukish
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Asano Hidekazu
Ebs Technology Research Project Radioactive Waste Management Funding And Research Center
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SAWA Shuusuke
Nuclear Fuel Cycle and Environmental system Department, Nuclesr Power Division, Ishikawajima-Harima
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Aritomi Masanori
Research Lab. For Nucl. Reactors Tokyo Institute Of Technology
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Sawa Shuusuke
Nuclear Fuel Cycle And Environmental System Department Nuclesr Power Division Ishikawajima-harima He
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