临界事故报警系统仪表剂量计算方法研究

The Dose Calculation Method Research for the Criticality Accident Alarm System Instrument

本文对临界安全基准实验国际评价中的迷宫实验进行了详细建模和验证计算,使用三维蒙特卡洛程序,采用两步法对中子探测器的读数进行了预测,并与实验结果进行了比较分析,统计了所有448个实验测点的计算偏差分布。通过总结临界事故报警系统在实际应用时位置选择和阈值设定的步骤,评价了本文所验证内容在上述过程中的作用。本文所开展的临界事故报警系统仪表剂量计算方法研究是临界事故报警系统设置中一项基础工作,可以为实际应用提供计算精度的参考数据,也可以应用于中子屏蔽设施的评价工作。

This paper sets up a detailed model and does a validation calculation work for a labyrinth experiment in the international handbook of evaluated criticality safety benchmark experiments. A two-step method is used to predict the neutron detector＇s readings using a three-dimensional Monte Carlo code. The calculation results are compared to the experiment readings, and the calculation biases statistic is done for the total 448 detect points. According to summarize the process in the location choosing and threshold setup for the criticality accident alarm system in the practice, the validation content done in this paper is evaluated. The dose calculation method research for the criticality accident alarm system instrument carried out in this paper is a base task in the criticality accident alarm system setup process. It can provide reference data for calculation precision in practice, and it can also be used for the neutron shielding configuration installations＇ evaluation work.