Analysis on personal dose of occupational external exposure of radiation workers in Gansu Province
Objective To analyze the personal dose level of occupational external exposure of radiation workers in Gansu Province,provide references for health management of radiation personnel and prevention of radiation diseases.Methods The personal dose monitoring and evaluation of radiation workers in Gansu Province in 2021 was conducted according to national standards.The RE2000A fully automatic thermoluminescence dose readout instrument and precision annealing furnace was applied for the measurement and annealing.The statistical analysis was performed using SPSS 22.0.Results A total of 4 031 radiation workers from 273 units were collected in this analysis.The annual effective dose of monitored person was 0.28 mSv/a.There was statistically significant differences in effective dose distribution among different occupational categories(H=147.22,P＜0.05).The effective dose of other units such as education and animal hospitals(0.30 mSv/a)was higher than that of medical application personnel(0.28 mSv/a),and the difference was statistically significant(Z=-10.82,P＜0.05).Among the medical application categories,nuclear medicine had the highest effective dose(0.47 mSv/a),followed by interventional radiology(0.31 mSv/a).There was a statistically significant difference in the distribution of monitoring results among different levels of hospitals(H=20.69,P＜0.05),and the annual effective dose of individual monitoring results in tertiary hospital was lowest(0.25 mSv/a).Conclusions The personal dose of occupational external exposure in Gansu Province is generally low in 2021.It is necessary to continue to increase the importance of radiation workers and avoid wearing errors,intentional exposure,and other situations.The protection and supervision of industrial application units,education,scientific research,and animal hospitals and other institutions should be strengthened.The medical institutions should strengthen monitoring of local organs and internal radiation for intervention and nuclear medicine personnel.
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