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本文应用蒙特卡罗方法计算了无模拟检测物和有模拟检测物情况下 60 Co集装箱检测大厅内的辐射剂量率分布。首先将无模拟检测物条件下的计算结果与实验测量数据对照 ,验证了所设物理模型的合理性。然后 ,用两种厚度的聚乙烯板和铁板作模拟检测物进行了系统的计算。通过对计算结果的分析 ,讨论了模拟检测物对厅内辐射剂量率的影响。结果表明 ,60 Co集装箱检测系统的辐射安全性良好。
In this paper, Monte-Carlo method was used to calculate the radiation dose rate distribution in 60 Co container inspection hall without simulated test objects and simulated test objects. First of all, the simulation results without simulated test objects are compared with the experimental measurement data to verify the rationality of the physical model. Then, two types of polyethylene plates and iron plates were used as the simulated test objects for the calculation of the system. Through the analysis of the calculation results, the influence of the simulated test objects on the radiation dose rate in the hall is discussed. The results show that the radiation safety of the 60 Co container inspection system is good.