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由于聚变—裂变混合堆D—T周期性燃烧,使第一壁的温度随时间呈周期性变化,且与壁负荷相应的温度循环范围很大,以至产生严重的热应力。为使第一壁更好冷却,第一壁采用了有肋片的结构,但在第一壁和肋片的连接处温差会加大,这就比一般结构的第一壁造成更大的热应力。鉴于以上两点,计算和研究第一壁热应力,对解决聚变—裂变混合堆工程问题是十分必要的。
Due to the periodic combustion of the fusion-fission hybrid stack D-T, the temperature of the first wall varies cyclically with time and the temperature cycle corresponding to the wall load is so large that severe thermal stress is generated. For better cooling of the first wall, the first wall has a ribbed configuration, but the temperature difference at the junction of the first wall and the rib will increase, which causes more heat than the first wall of the general structure stress. In view of the above two points, calculating and studying the thermal stress of the first wall is very necessary to solve the engineering problem of the fusion-fission hybrid reactor.