Fabrication of the vacuum vessel for JT-60 machine upgrade

Author

Uchikawa, T. ; Takanabe, K. ; Tsujimura, S. ; Ue, K. ; Oka, K. ; Kuri, S. ; Ioki, K. ; Namiki, K. ; Suzuki, Y. ; Horiike, H. ; Ninomiya, H. ; Yamamoto, M. ; Neyatani, Y. ; Ando, T. ; Matsukawa, M.

Author_Institution

Mitsubishi Heavy Industries Ltd., Kobe, Japan

fYear

1991

fDate

30 Sep-3 Oct 1991

Firstpage

972

Abstract

The JT-60U (JAERI Tokamak-60 upgrade) vacuum vessel was successfully constructed in a very short period under severe technical requirements and constraints. The fabrication processes of the high-performance vessel feature application of hot sizing, computer-aided abrasive jet machining, electron beam welding and antidistortion measures of welding, and final assembly of poloidally divided blocks at site. The new vacuum vessel features a three-dimensionally curved, thin double-skin torus with multi-arc D-shaped cross section. The double-skin structure is strengthened with square pipes placed in between the outer and inner skins

Keywords

Tokamak devices; fusion reactor theory and design; JT-60U; antidistortion measures; computer-aided abrasive jet machining; double-skin torus; electron beam welding; hot sizing; poloidally divided blocks; tokamak fusion reactor; vacuum vessel; Abrasives; Application software; Assembly; Electron beams; Fabrication; Machining; Size measurement; Skin; Vacuum technology; Welding;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering, 1991. Proceedings., 14th IEEE/NPSS Symposium on

Conference_Location

San Diego, CA

Print_ISBN

0-7803-0132-3

Type

conf

DOI

10.1109/FUSION.1991.218785

Filename

218785