Author/Authors :
Asano، نويسنده , , Shiro and Okuyama، نويسنده , , Toshihisa and Oonawa، نويسنده , , Toshiwo and Yanagi، نويسنده , , Yutaka and Ejiri، نويسنده , , Mitsuru and Kanahara، نويسنده , , Toshio and Ichihashi، نويسنده , , Koji and Kikuchi، نويسنده , , Atsushi and Mizumaki، نويسنده , , Shoichi and Masaki، نويسنده , , Kei and Shibama، نويسنده , , Yusuke K. and Katayama، نويسنده , , Masahiro and Sakasai، نويسنده , , Ak، نويسنده ,
Abstract :
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° upper half mock-up [1]. This paper presents the R&D results obtained in the first and second stages.
Keywords :
JT-60SA , Vacuum vessel , Welding , SUS316L
