Fundamental welding R&; D results for manufacturing vacuum vessel of JT-60SA

The real vacuum vessel (VV) manufacturing of JT-60SA has started since November 2009 at Toshiba. Prior to starting manufacturing, fundamental welding R&Ds had been performed by three stages. In the first stage, primary tests for screening welding method were performed. In the second stage, the t...

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Bibliographic Details
Published in:Fusion engineering and design 2011-10, Vol.86 (9-11), p.1816-1820
Main Authors: Asano, Shiro, Okuyama, Toshihisa, Oonawa, Toshiwo, Yanagi, Yutaka, Ejiri, Mitsuru, Kanahara, Toshio, Ichihashi, Koji, Kikuchi, Atsushi, Mizumaki, Shoichi, Masaki, Kei, Shibama, Yusuke K, Katayama, Masahiro, Sakasai, Akira
Format: Article
Language:English
Subjects:
Arc welding
Distortion
Electric potential
Grooves
Shells
Vessels
Voltage
Welding
Online Access:Get full text
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Summary:The real vacuum vessel (VV) manufacturing of JT-60SA has started since November 2009 at Toshiba. Prior to starting manufacturing, fundamental welding R&Ds had been performed by three stages. In the first stage, primary tests for screening welding method were performed. In the second stage, the trial welding for 1 m-long straight and curved double shell samples were conducted. The dependences of welding quality and distortion on the welding conditions, such as arc voltage and current, setting accuracy, welding sequence, and the shape of grooves were studied. In addition, welding condition with low heat input was explored. In the last stage, fabrication sequence was confirmed and established by the trial manufacturing of the 20 degree upper half mock-up, This paper presents the R&D results obtained in the first and second stages.
ISSN:0920-3796
DOI:10.1016/j.fusengdes.2011.03.024