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Assembly and final dimensional inspection at factory of the JT-60SA Cryostat Vessel Body Cylindrical Section

机译:JT-60SA低温恒温器船体圆柱部分的工厂组装和最终尺寸检查

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The superconducting tokamak JT-60SA is currently being assembled at the QST laboratories in Naka (Japan). Within the European contribution in the framework of the Broader Approach, Spain has been responsible for providing JT-60SA cryostat. The cryostat is a large vacuum vessel made up of 304 stainless steel which encloses the tokamak providing the vacuum environment to reduce thermal loads on the components at cryogenic temperature. It must withstand the external atmospheric pressure during normal operation and the internal overpressure in case of an accident. Due to functional purposes, the cryostat has been divided in three assemblies: the Cryostat Base (CB), the Cryostat Vessel Body Cylindrical Section (CVBCS) and the Top Lid. For transport and assembly reasons the cryostat is made up of 20 main parts: 7 making up the CB and 13 making up the CVBCS (including the top lid). The joints between them rely on bolted flanges together with light seal welds, non-structural fillet welds performed from inside and/or outside of the cryostat. The single wall is externally reinforced with ribs to support the weight of all the ports and port plugs and also to withstand the vacuum pressure. The material is SS 304 (Co < 0.05 wt%) with a permeability (mu(rel)) below 1.1. The CVBCS made of a single wall is a stainless steel shell with a thickness of 34 mm. The CB was manufactured and assembled in-situ in 2013, while the CVBCS has been manufactured, assembled, measured by a Spanish company (ASTURFEITO S.A) and delivered to Japan in November 2017. The paper summarizes the assembly and final measurement of the CVBCS at the factory.
机译:超导托卡马克JT-60SA目前正在Naka(日本)的QST实验室组装。在欧洲对“更广泛方法”框架的贡献中,西班牙负责提供JT-60SA低温恒温器。低温恒温器是由304不锈钢制成的大型真空容器,它包围了托卡马克,从而提供了真空环境,以降低低温下组件上的热负荷。它必须在正常运行期间承受外部大气压,在发生事故时必须承受内部超压。由于功能的原因,低温恒温器分为三个组件:低温恒温器底座(CB),低温恒温器容器主体圆柱部分(CVBCS)和顶盖。出于运输和组装的原因,低温恒温器由20个主要部件组成:7个组成CB,13个组成CVBCS(包括顶盖)。它们之间的接头依靠螺栓法兰以及轻型密封焊缝,从低温恒温器内部和/或外部进行的非结构角焊缝。单壁在外部用肋加强,以支撑所有端口和端口塞的重量,并承受真空压力。该材料是SS 304(Co <0.05 wt%),其磁导率(mu(rel))低于1.1。由单壁制成的CVBCS是厚度为34毫米的不锈钢外壳。 CB于2013年现场制造和组装,而CVBCS由西班牙公司(ASTURFEITO SA)制造,组装,测量并于2017年11月交付给日本。该文件总结了CVBCS的组装和最终测量该工厂。

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