Cai Yao, Lu Shuangying, Hao Rui, Hu Huasi
China Ship Development and Design Center, Wuhan, 430064, China; School of Nuclear Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China.
China Ship Development and Design Center, Wuhan, 430064, China.
Appl Radiat Isot. 2020 May;159:108940. doi: 10.1016/j.apradiso.2019.108940. Epub 2019 Oct 18.
Optimizing the shielding material via intelligent optimization algorithms has become a tendency in recent years. This study investigated the calculation modes used in the optimization. Two modes are presented in this study. Mode A optimizes the shield with a variable thickness, the result optimized is exactly the desired result. It is suitable for the application that only need material with small thickness (less than several mean free paths), such as compact systems or mobile devices. Mode B optimizes the shield with a fixed thickness, the optimized result is just an intermediate solution, and the final result needs to be extrapolated. It could be applied to optimize the material whose thickness needed is comparatively larger. Several materials were optimized using the two modes, and comparisons among the materials were made. It is found that, the material properties optimized by the two modes are basically the same, and the thickness should be set at about 10 mean free paths of neutrons in those materials when the mode B is adopted.
近年来，通过智能优化算法优化屏蔽材料已成为一种趋势。本研究调查了优化中使用的计算模式。本研究提出了两种模式。模式A通过可变厚度优化屏蔽，优化结果正是所需结果。它适用于只需要小厚度材料（小于几个平均自由程）的应用，如紧凑型系统或移动设备。模式B通过固定厚度优化屏蔽，优化结果只是一个中间解，最终结果需要外推。它可用于优化所需厚度相对较大的材料。使用这两种模式对几种材料进行了优化，并对这些材料进行了比较。结果发现，两种模式优化的材料性能基本相同，采用模式B时，材料中中子的厚度应设置在约10个平均自由程左右。
