某场所放射性核素场内扩散规律分析  

An analysis of the radionuclide diffusion rule at a radioactive site

作　　者：陈迎锋[1] 张奎 商学利[1] 丁雄 李臻 CHEN Yingfeng;ZHANG Kui;SHANG Xueli;DING Xiong;LI Zhen(Unit 92609 of PLA,Beijing 100077,China)

机构地区：[1]中国人民解放军92609部队,北京100077

出　　处：《哈尔滨工程大学学报》2022年第11期1572-1578,共7页Journal of Harbin Engineering University

摘　　要：为了掌握某放射性操作场所核事故情形下的放射性核素微场扩散规律,本文采用计算流体力学建模方法,建立了2种典型通排风条件下核素扩散模型。结果表明:不同放射性核素、不同通排风方式等对微场放射性核素迁移扩散方向和大气弥散因子的变化范围影响较大,应急处置人员应采取不同的防护措施以有效降低个人有效剂量。计算流体力学建模方法可有效模拟微场环境放射性核素迁移扩散。To master the microfield transmission and diffusion law of radionuclides in a nuclear accident in a radio-active operating place,two typical diffusion models of radionuclides under ventilation and exhaust conditions are established by using the computational fluid dynamics(CFD)modeling method.The simulation results show that the directions of transmission and diffusion,as well as the range of atmospheric dispersion factors,are greatly influ-enced by various radionuclides and different ventilation and exhaust conditions in a microfield environment.The emergency response personnel should take various protective measures to effectively reduce the personal effective dose.The CFD modeling method could effectively simulate the transmission and diffusion of the radionuclides in a microfield environment.

关 键 词：放射性 核素 计算流体力学 扩散 模型 微场 

分 类 号：TL591[核科学技术—核技术及应用]