摘要
通过对居室内220Rn及其子体的产生、衰变及扩散运移规律的分析,建立了三维数学模型,并利用有限元法分析了居室内220Rn及其子体的空间分布。通过有限元分析得知:220Rn及其子体浓度的计算结果随单元格划分越多越精确,但其平均浓度随单元数目增多变化并不明显。220Rn及其子体的平衡因数依据居室内三维分布的220Rn及其子体平均浓度进行计算更合理些。
Three-dimensional mathematics model was established by analyzing generation, decay and diffusional transport law of thoron and it's daughters in dwellings. The spatial distribution of thoron and it's daughters in dwellings were researched by finite element calculation. Though average concentration of thoron and it's daughters has a little change with increase of the numbers of finite element, the more the number of finite element is, the more exact it is. The equilibrium factor of thoron and it's daughters was calculated according to three-dimensional distribution in dwellings, which may be reasonable.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2005年第4期357-362,共6页
Atomic Energy Science and Technology
基金
国防科工委核能开发"十五"核安全与辐射防护基金资助项目(HHAQ)
