Analysis of individual monitoring results of occupational external exposure in a steel enterprise in Baotou city from 2018 to 2022
Objective To study the levels of individual dose of radiation workers in a steel enterprise in Baotou City from 2018 to 2022,and analyze the main factors affecting the annual dose,and provide basic data for revising relevant standards.Methods According to the requirements of occupational external exposure personal monitoring standards(GBZ 128-2019),the personal dose monitoring of workers working in a steel enterprise in Baotou City from 2018 to 2022 was carried out,three months for a period,continuous monitoring 4 periods,and the results were analyzed.Results A total of 1 360 workers from 10 employers within the enterprise were surveyed.The annual doses were in the range of 0.500-0.844 mSv,with an average annual individual dose of 0.676 mSv.Especially,the average annual individulal effective dose to workers for safety management and inspection was 0.986 mSv,hiher than 0.698 mSv to rolling workers,pump operators,and continuous casters(Z=56.89,P＜0.001).Additionally,female worders working with the radiation generators had a higher average annual individual effective dose of 0.821 mSv,than 0.691 mSv to the male workers who were exposed to sealed sources possibly in many cases as needed,with a statistically significant difference(Z=-5.53,P＜0.001).Conclusions The average annual individual effective dose to radiation workers in an iron and steel enterprise in Baotou City meets the requirements of the relevent national standard.The annual dose of women and some workers is relatively high,so the management of radiation workers should be strengthened and the radiation protection measures in the workplace should be improved.
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