This article presents development of remote handling tool for FW central bolt tightening and its demonstration of the functional requirements in prototype testing. A compliance mechanism was newly designed and successfully demonstrated for the capacity to handle the misalignment of the thread part and to withstand 10 kN m torque. Maraging steel wrench with out-of-standard Torx bit was designed and fabricated. Irradiation test of the maraging steel material, in which corrosion was found at the total dose 0.3MGy, is also reported.

中文翻译：

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开发用于ITER第一壁中心螺栓远程操作的锚固工具

本文介绍了用于FW中央螺栓拧紧的远程处理工具的开发，并演示了原型测试中的功能要求。新设计了一种柔顺机构，并成功展示了其能够处理螺纹部件未对准并承受10 kN m扭矩的能力。设计制造了不符合标准的Torx钻头的可锻钢扳手。还报道了马氏体时效钢材的辐照试验，其中总剂量为0.3MGy时发现腐蚀。