气载核素迁移扩散模型LPAM对SF_(6)示踪实验的模拟分析

Simulation analysis of SF_(6)Tracer Experiments Using an Airborne Nuclide Migration and Diffusion Model LPAN

为了验证国产核事故后果评价系统中的拉格朗日粒子模型LPAM在我国滨海核电厂使用的有效性,本研究采用影响扩散因素相对单一的大气扩散示踪实验对LPAM的模拟结果进行了验证。结果表明LPAM模型模拟的结果与示踪实验结果偏差合理,吻合度与欧洲核事故后果评价系统JRODOS中DIPCOT对示踪实验模拟的表现基本一致,同时4次模拟结果与采样结果的相关性也较好,说明核事故后果评价系统中所采用的拉格朗日粒子模型LPAM模拟结果具有合理性。同时,在后续研究中增加相应物理资料的使用,可以进一步对模型有效性进行研究判断,本研究可为后续有效性验证工作提供借鉴。

In order to verify the effectiveness of the Lagrangian particle model LPAM in the domestic nuclear accident consequence assessment system used in coastal nuclear power plants in China, this study used atmospheric diffusion tracing experiments with relatively homogeneous diffusion factors to verify the simulation results of LPAM.The results showed that the deviation between the LPAM model simulation results and the tracer experiment results was reasonable, and the consistency was basically consistent with the performance of DIPCOT in JRODOS(European Nuclear Accident Consequence Assessment System) for tracer experiment simulation.The correlation between the four simulation results and the sampling results was also in a good performance, indicating that the simulation results of the Lagrangian particle model LPAM used in the domestic consequence assessment system of nuclear accidents were reasonable.In addition, increasing the use of corresponding physical data in subsequent research can further evaluate the effectiveness of the mode.This study can provide reference for subsequent effectiveness verification.