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本工作采用美国洛斯阿拉莫斯（Los Alomos）编制的蒙特卡罗软件MCNP,对核工业航测遥感中心二级放射性计量站的地面圆柱体放射性模型（φ220cm×60cm,以下简称圆柱体模型）表面及上方不同高度处的空气吸收剂量率进行了模拟计算。 模拟计算中的几何边界处理是以圆柱体模型底面中心点为球心,以15m球半径作为圆柱体模型的上半球主气包络面时,底部以地平面作为包络面。当圆柱体模型内放射性核素发射的γ射线逃逸出上述包络面,则该光子的历史结束。
This work uses the Monte Carlo software MCNP compiled by Los Alomos to analyze the surface cylindrical radioactive model (φ220cm × 60cm, hereinafter referred to as cylinder model) of the secondary radioactive metering station of the Nuclear Industry Survey and Remote Sensing Center The upper air dose rates at different heights were simulated. The geometric boundary processing in the simulation calculation is based on the center of the bottom surface of the cylinder model as the center of the sphere and the radius of 15m as the main gas envelope of the upper hemisphere of the cylinder model with the ground plane as the envelope surface. When the gamma rays emitted by the radionuclide within the cylindrical model escape from the envelope, the photon history ends.