环境γ辐射剂量率连续监测数据影响因素和特征分析

Abstract

Abstract: Continuous monitoring of γ dose rate is the main item of regular monitoring and supervision monitoring of nuclear power plants. Analysis of influence factors for continuous monitoring data of γ dose rate is important to identify abnormal discharge of nuclear power plants and establish emergency monitoring background. In this paper, various influence factors, including cosmic ray response, meteorological parameters, and discharge from nuclear power plants were studied on the basis of the continuous monitoring hourly data of γ dose rate from a supervision monitoring system of Ningde Nuclear Power Plant in 2016 and the related characteristics were summarized. The study results show that γ radiation mainly comes from natural radioactive isotopes and cosmic rays. The variation of meteorological parameters is the main influence factor on variation of γ dose rate. From the rapid Fourier analysis ( FFT) and the analysis of meteorological parameter relativity, it shows that there is an obvious date-period variation in the data of continuous monitoring of γ dose rate. The radioactivity released from nuclear accidents may also affect the monitoring result of γ dose rate.

Key words: gamma dose rate, continuous monitoring, nuclear power plant, meteorological influence

CLC Number:

TL75

LUO Dunye, SHA Xiangdong, SHANGGUAN Zhihong, LIN Minggui, HUANG Yanjun, PENG Kai. Study on influence factors and characteristics of continuousmonitoring data of environmental γ dose rate[J].RADIATION PROTECTION, 2018, 38(4): 308-318.

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Study on influence factors and characteristics of continuousmonitoring data of environmental γ dose rate

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