降雨对连续γ辐射测量影响的数值拟合

辐射防护 ›› 2017, Vol. 37 ›› Issue (5): 361-368.

降雨对连续γ辐射测量影响的数值拟合

陈爱, 周睿东, 陈文涛, 廖建华, 赖力明

广东省环境辐射监测中心,广州 510300

收稿日期:2016-12-21 出版日期:2017-09-20 发布日期:2021-11-11
作者简介:陈爱(1986—),男,2010年毕业于哈尔滨工程大学自动化专业,2013年毕业于哈尔滨工业大学控制工程专业,获硕士学位,助理工程师。E-mail:303593940@qq.com

Numerical simulation of γ radiation measurement in rainfall

Chen Ai, Zhou Ruidong, Chen Wentao, Liao Jianhua, Lai Liming

Guangdong Environmental Radiation Monitoring Center, Guangzhou 510300

Received:2016-12-21 Online:2017-09-20 Published:2021-11-11

摘要/Abstract

摘要： 为了准确判断降雨对核电厂周围γ辐射监测数据的影响,本文对其进行了量化研究。首先通过雨水中放射性核素测量实验,验证了雨水中影响γ剂量率波动的主要核素为²¹⁴Pb、²¹⁴Bi,持续时间约为降雨停止后两个小时。结合相关实测数据和雨水中²¹⁴Pb、²¹⁴Bi的衰变规律,进行数值分析与拟合研究,获得降雨对环境γ剂量率影响的数值拟合方程,在多雨峰时,只需要通过第一个雨峰、γ峰的数据,即可拟合预测降雨时刻γ剂量率的变化情况。本文利用不同雨强、不同地域的历史监测数据,对数值拟合方程进行了适用性验证,实测曲线与拟合预测曲线基本一致。这种方法对有多雨峰降雨过程中核电厂周围环境是否存在人工辐射异常进行实时判断具有重要的参考意义。

关键词: 降雨, 放射性核素, γ剂量率, 数值拟合

Abstract: A quantitative research about the effect of rainfall on gamma radiation monitoring data around nuclear power plants was carried out. First, according to the radionuclide measurement of rainfall, the key radionuclides impacting the gamma dose rate were found to be Pb-214 and Bi-214, the duration was about two hours after rainfull was over. Combining the relevant monitoring data with the decay of Pb-214 and Bi-214, the fitting equation for the effect of rainfall on gamma dose rate was obtained. The change of γ dose rate in rainfall can be predicted with the equation through inputting the first peak of the rain and γ dose rate in the case of multiple rain peaks. By applying the equation to the historical data including different rainfall intensities and different locations, the simulation results obtained were found to be consistent with the measurements. This method is meaningful to the real-time judgment of abnormal existence of artificial radionuclides in the process of rainfall around the nuclear power plant.

Key words: rainfall, radionuclides, γ dose rate, numerical simulation

中图分类号:

TL75+1

陈爱, 周睿东, 陈文涛, 廖建华, 赖力明. 降雨对连续γ辐射测量影响的数值拟合[J]. 辐射防护, 2017, 37(5): 361-368.

Chen Ai, Zhou Ruidong, Chen Wentao, Liao Jianhua, Lai Liming. Numerical simulation of γ radiation measurement in rainfall[J]. RADIATION PROTECTION, 2017, 37(5): 361-368.

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