Analysis and optimization of performance parameters of the^(220)Rn chamber in flow-field mode using computational fluid dynamics method  

作　　者：Shao-Hua Hu Yong-Jun Ye Zheng-Zhong He De-Tao Xiao Xiang-Yu Xu Jian-Kai Wang Qing-Zhi Zhou 

机构地区：[1]School of Nuclear Science and Technology,University of South China,Hengyang 421001,China [2]School of Resources Environment and Safety Engineering,University of South China,Hengyang 421001,China

出　　处：《Nuclear Science and Techniques》2024年第10期70-85,共16页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(Nos.12375310,12175102,and 118750356);Youth Talent Foundation of Hunan Province of China(2022TJQ16);Graduate Research and Innovation Projects of Hunan Province(CX20230964)。

摘　　要：The impact of the radiation dose produced by^(222)Rn/^(220)Rn and its progeny on human health has garnered increasing interest in the nuclear research field.The establishment of robust,regulatory,and competent^(220)Rn chambers is crucial for accurately measuring radioactivity levels.However,studying the uniformity of the^(220)Rn progeny through experimental methods is challenging,because measuring the concentration of^(220)Rn and its progeny in multiple spatial locations simultaneously and in real time using experimental methods is difficult.Therefore,achieving precise control of the concentration of^(220)Rn and its progeny as well as the reliable sampling of the progeny pose significant challenges.To solve this problem,this study uses computational fluid dynamics to obtain the flow-field data of the^(220)Rn chamber under different wind speeds and progenyreplenishment rates.Qualitative analysis of the concentration distribution of the progeny and quantitative analysis of the progeny concentration and uniformity of the progeny concentration are conducted.The research findings indicated that the progeny concentration level is primarily influenced by wind speed and the progeny-complement rate.Wind speed also plays a crucial role in determining progeny concentration uniformity,whereas the progeny-complement rate has minimal impact on uniformity.To ensure the accuracy of^(220)Rn progeny concentration sampling,we propose a methodology for selecting an appropriate sampling area based on varying progeny concentrations.This study holds immense importance for enhancing the regulation and measurement standards of^(220)Rn and its progeny.

关 键 词：THORON PROGENY REGULATORY CFD simulation 

分 类 号：TL81[核科学技术—核技术及应用]