摘要
空间堆对辐射屏蔽尺寸和重量要求苛刻,为寻找合适的屏蔽方案,需要对屏蔽材料、结构进行选型研究。本文首先介绍了国内外对空间堆屏蔽目标及限值的研究进展,基于反应堆屏蔽设计原理,针对不同应用场景抽象出平板模型和球模型,在不同设计目标下对不同材料的屏蔽性能进行分析,基于分析结果采用自动化优化工具对屏蔽方案进行选型,分析了各个方案的优缺点。结果表明,放射源的能谱、源的尺寸大小、屏蔽体离源的距离、不同的屏蔽设计目标都会影响屏蔽材料和结构的选择,需要根据应用需求进行筛选;碳化硼、氢化锂和钨是较好的空间堆屏蔽材料;利用自动化优化工具对屏蔽体进行分层布置可实现有效减重。
ed for different application scenarios,and the shielding performance of different materials is analyzed under different design objectives.Based on the analysis results,automatic optimization tools are used to select shielding schemes,and the advantages and disadvantages of each scheme are analyzed.The results show that the energy spectrum of the source,the size of the source,the distance between the shield and the source,and different shielding design objectives will affect the selection of shielding materials and structures,which needs to be carried out according to the application requirements.Boron carbide,lithium hydride and tungsten are good shielding materials for space reactors,and the use of automatic optimization tools for layered layout of the shield can achieve effective weight reduction.
作者
黄迁明
李兰
柴晓明
刘斌
应栋川
Huang Qianming;Li Lan;Chai Xiaoming;Liu Bin;Ying Dongchuan(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2023年第4期17-24,共8页
Nuclear Power Engineering
关键词
阴影屏蔽
空间堆
屏蔽限值
屏蔽材料
屏蔽结构
屏蔽优化
Shadow shielding
Space reactor
Shielding limits
Shielding material
Shielding structure
Shielding optimization
