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Development of EC Launcher components for ITER

2005; IOP Publishing; Volume: 25; Linguagem: Inglês

10.1088/1742-6596/25/1/010

1742-6596

Koji Takahashi, Noriyuki Kobayashi, Atsushi Kasugai, K. Sakamoto,

Fusion materials and technologies

EC launcher components for the ITER have been designed and developed. Thermomechanical analysis of a front shield module and a steering mirror for the ITER equatorial launcher were carried out. Maximum temperature and induced stress of the front shield module are estimated to be 232 °C and 351 MPa, respectively. Maximum temperature of 302 °C is expected at the steering mirror surface under the 1 MW-CW operation. Maximum induced stress at the mirror surface and the inner surface of the cooling tube are 150 MPa and 248 MPa, respectively. These values are less than allowable level. A cyclic loading test of the spiral cooling tube to supply cooling water to the steering mirror revealed the durability over one million rotational cycles. A diamond window with copper coated edge was developed as a reliable torus window in terms of safety. The result of the 1 MW relevant experiment of the window shows no degradation of the high power transmission performance. It is thermomechanically and experimentally verified that most of the EC launcher components that has been developed for the ITER are acceptable.