Analysis on personal dose monitoring results for radiation workers in Tianjin City from 2019 to 2021
Objective To analyze the personal dose monitoring level of radiation workers in Tianjin and provide a basis for carrying out radiation protection work.Methods According to the GBZ128-2019"Code for Personal Monitoring of Occupational External Exposure"and GB 18871-2002"the Basic Standards for Protection against Ionizing Radiation and Safety of Radiation Sources",the personal dose levels of radiation workers from 2019 to 2021 were estimated using the thermoluminescence dose system,and the Kruskal Wallis H test and Nemenyi method were used for statistical analysis.Results A total of 15 115 radiation workers were monitored from 2019 to 2021,with a per capita annual effective dose of 0.129 mSv/a.The per capita annual effective dose in 2021 was 0.150 mSv/a,which was higher than the per capita annual effective dose in 2019 and 2020,and the differences were statistically significant(both P＜0.05).The annual effective dose per capita in diagnostic radiology(0.132 mSv/a)was higher than other occupational categories,followed by nuclear medicine(0.129 mSv/a),and the differences were statistically significant(all P＜0.05).The annual effective dose per capita in tertiary hospitals was 0.127 mSv/a,which was lower than that in primary and secondary hospitals,and the difference was statistically significant(both P＜0.05).Conclusion The personal dose of radiation workers in Tianjin City is at a relatively low level,and it is necessary to strengthen the radiation health management of diagnostic radiology,nuclear medicine,and primary and secondary hospital staff.
Radiation workersPersonal doseAnnual effective dose per capita
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