Progress of Manufacturing Trials for the ITER Toroidal Field Coil Structures

Author

Iguchi, Masaki ; Morimoto, Masayuki ; Chida, Yuji ; Hemmi, T. ; Nakajima, Hiromasa ; Nakahira, M. ; Koizumi, N. ; Yamamoto, Akiyasu ; Miyake, Tetsuo ; Sawa, N.

Author_Institution

Supercond. Magn. Technol. Group, Japan Atomic Energy Agency, Naka, Japan

Volume

24

Issue

3

fYear

2014

fDate

Jun-14

Firstpage

1

Lastpage

4

Abstract

Japan Atomic Energy Agency (JAEA) has been conducting manufacturing feasibility trials of the toroidal field coil structures since 2009. Their feasibility was confirmed; however, since the structures were welded by using a one-side welding method, welding deformation was much larger than expected. By using a double-side welding method and optimizing the welding sequence, welding deformation can be minimized. Therefore, JAEA conducted full-scale trial manufacturing of basic segments to optimize the double-side welding sequence. After optimization, welding deformation was reduced. As a result, the double-side welding method will be used to manufacture the toroidal field coil structures as a manufacturer´s selection.

Keywords

Tokamak devices; superconducting coils; welding; ITER toroidal field coil structures; JAEA; Japan Atomic Energy Agency; Tokamak device; double-side welding sequence optimization; manufacturing feasibility trials; one-side welding method; welding deformation; Coils; Distortion measurement; Fixtures; Materials; Shape; Welding; ITER; Tokamak devices; toroidal field coil structure;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2013.2294422

Filename

6680654