@article{oai:repo.qst.go.jp:00074651,
 author = {浅野, 史朗 and 江尻 満 and 奥山, 利久 and 水牧, 祥一 and 山田, 正博 and 小川, 貴久 and 持田, 務 and 高橋, 信次 and 柳 寛 and 江崎, 康一 and 大森, 順次 and 早川, 敦郎 and 芝間, 祐介 and 正木, 圭 and 逆井, 章 and Shibama, Yuusuke and Masaki, Kei and Sakasai, Akira},
 journal = {Fusion Engineering and Design},
 month = {Nov},
 note = {In the operation of JT-60SA tokamak device, such loads as electromagnetic (horizontal and vertical loads of 2.5 MN and 7.5 MN, respectively) and seismic are imposed on the VV, and thermal expansion takes place during the baking of Vacuum Vessel (VV). The nine Vacuum Vessel Gravity Supports (GSs) have to support the loads and total dead weight of 400 tons including in-vessel components and compensate thermal deformation. Assembling to realize precise positioning of each GS to the VV is indispensable in the limited space between toroidal field coils. To meet the design requirements described above, a GS is equipped with an assembly of flexible plates (FPs) in its lower part and a stem in its upper part with external thread that is screwed upward on the internal thread of VV stub for installation. Electric discharge machining is applied to form FPs without welding. Narrow gap TIG and electron beam welding are also adopted to suppress welding distortion. By the FEM analysis-based design and successful product manufacturing, we have established a design concept and manufacturing technology of GS that has both stiffness and flexibility. The installation mock-up test of GS has also successfully finished.},
 pages = {661--666},
 title = {Design, manufacturing and installation of the JT-60SA vacuum vessel gravity support},
 volume = {136A},
 year = {2018}
}