辐照后铍构件的应力分析与评价

Analysis and Assessment of Reactor Beryllium Component Stress

针对铍材的机械性能和辐照特性,在考虑机械应力、热应力、辐照肿胀应力以及按工况进行载荷组合的基础上,对辐照后铍构件的应力进行分析计算,并采用最大拉应力理论进行评价。以高通量工程试验堆(HFETR)铍组件为例,采用ABAQUS软件计算其关键部件铍套管的应力状态。结果显示,其最大主应力远小于材料拉伸强度,从应力破坏的角度看,该铍组件仍可继续使用较长时间。

Based on the mechanical and irradiation properties of beryllium, the irradiated beryllium component stress analysis was proposed, in which the mechanical stress, thermal stress and irradiation swelling induced stress and the load combination in the operation conditions are considered,, and also the maximum tensile stress theory was suggested to use in the assessment. In this paper, a stress analysis and assessment was made for the beryllium tube, which is the key component of HFETR beryllium assembly, by ABAOUS. The result showed that the maximum principle stress was much less than the tensile stress, and that the beryllium assembly can be still used for a long time from the perspective of stress rupture.