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| 封闭空间内放射性核素的扩散迁移规律研究 |
| Study on the Diffusion and Migration Patterns of Radioactive Nuclides in Enclosed Spaces |
| 投稿时间：2024-03-06 修订日期：2024-03-19 |
| DOI： |
| 中文关键词: 封闭空间 放射性核素迁移 核事故应急 OpenFOAM。 |
| 英文关键词:Encloesd Spaces Radionuclide Migration Nuclear Accident Emergency OpenFOAM |
| 基金项目: |
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| 中文摘要: |
| 为了研究封闭空间内放射性核素扩散迁移的规律，在OpenFOAM中对船用反应堆的舱室进行CFD建模并通过BuoyantSimplefoam求解器和对Scalartransportfoam求解器进行自定义对模型进行仿真模拟。实验结果表明在第19s时放射性核素开始往员工舱室进行扩散，82s开始往操作舱室进行扩散，但此时放射性核素的扩散迁移还是主要在热对流的作用下进行，在这之后放射性核素逐渐在重力作用下产生沉降充满舱室。研究结果表明封闭空间内的放射性核素主要在热对流的作用下扩散至人员聚集处，离反应堆舱室越远扩散速度会越慢，然后在重力作用下产生沉降，充满整个舱室。其结论为制定合理的应急安全策略提供了理论支持。 |
| 英文摘要: |
| In order to investigate the diffusion and migration patterns of radioactive nuclides in enclosed spaces,a Computational Fluid Dynamics(CFD)model of the compartments of a marine reactor was developed using OpenFOAM.The simulation was conducted utilizing the BuoyantSimplefoam solver and the Scalartransportfoam solver for custom simulations.Experimental results indicate that at 19 seconds,radioactive nuclides started diffusing into the crew compartment,and at 82 seconds,diffusion into the control room commenced.However, at this point,the diffusion and migration of radioactive nuclides primarily occurred under the influence of thermal convection.Subsequently,the radioactive nuclides gradually settled and filled the compartments due to gravitational effects.The research findings suggest that radioactive nuclides in enclosed spaces primarily diffuse towards areas of human occupancy under the influence of thermal convection.The farther away from the reactor compartment, the slower the diffusion rate. Subsequently, setting occurs under the influence of gravity,filling the entire compartment.These conclusions provide theoretical support for the formulation of rational emergency safety strategies. |
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