详细介绍了ITER驱动的次临界包层结构设计, 沿环向360°整个次临界包层被分成36瓣, 单瓣包层以等离子工作腔为分界面被分为内、外两部分, 分别由第一壁结构、支承结构、燃料区结构、产氚区结构和锆包壳结构等组成。有别于ITER装置现有的小模块包层结构, 单瓣内、外包层被设计成一种整体式内置结构, 从而减少了裂变燃料区中大量内嵌冷却剂压力管道接头数量、缩短了换料周期并节约了成本。同时考虑到ITER装置本体结构空间对次临界包层的限制, 提出了一种既能满足包层热工-流体要求又能实现包层工程焊接安装的管道汇总结构。最后运用Pro/e建模软件建立了包层三维CAD结构图, 为后续结构力学分析输出了有限元计算模型。

This paper introduces the structure design of subcritical blanket driven by ITER in detail. Along the toroidal 360 degree, the whole subcritical blanket is divided into thirty six petals. Furthermore, based on the interface of plasma chamber, each single blanket petal is divided into inner and outer parts, every part is made up of the first wall structure, supporting structure, fuel zone structure, tritium producing zone structure and zirconium cladding structure. For distinguishing the petal from the present small module blanket structure of ITER device, the inner and outer blankets are designed as a type of whole embedding structure to reduce the pipe connecting plug quantities of a large quantity of embedding coolant pressure pipes in fission fuel zone, shorten the period of changing fuel and reduce the cost. At the same time, considering the confinement of ITER device self-structure space for the subcritical blanket, a sort of converging pipe structure which can satisfy the requirements of thermal-fluid and realize project welding assembly for blanket is put forward. Finally, using software Pro/e, the blanket’s three dimensional CAD drawing is established in order to output the finite element computation model for mechanical analysis.