2016年南通市放射工作人员外照射个人剂量监测结果

目的 了解南通市放射工作人员职业外照射的剂量水平及分布情况，评价放射工作人员职业危害及防护效果，为放射防护管理工作提供科学依据。方法 使用RGD-3D热释光剂量仪对放射工作人员进行外照射个人剂量当量H_P（10）监测，职业类别包括诊断放射学、介入放射学、核医学、牙科放射学、放射治疗、工业应用等，采用全国放射卫生信息平台个人监测管理系统进行数据汇总统计。结果 南通市放射工作人员外照射人均年有效剂量为0.273 mSv/a，所有监测人员的年有效剂量均小于年剂量限值20 mSv，集体有效剂量为0.570人·Sv，人均年有效剂量以介入放射学（0.375 mSv/a）稍高，其次为核医学（0.316 mSv/a），人数最多的诊断放射学为0.271 mSv/a，其余职业类别年有效剂量值均在较低水平；不同地区放射工作人员平均年有效剂量相差不大，人均年有效剂量海安县（0.418 mSv/a）较其他地区稍高；二甲医院以下医疗单位监测剂量值（0.361 mSv/a）要高于二甲医院及以上医疗单位（0.182 mSv/a）和工业企业（0.143 mSv/a）。结论 2016年南通市放射工作人员年有效剂量均处于较低水平，我市放射工作人员的放射防护条件良好，工作环境安全。

Monitoring results of individual dose of external irradiation among radiation workers in Nantong City in 2016

Objective To explore the dose level and distribution of Nantong radiological workers' occupational exposure, evaluate the occupational hazards and protective effects of radiological workers and provide scientific basis for the management of radiological protection.Methods External irradiation dose equivalent H_P(10) monitoring for radiation workers was conducted using RGD-3D thermoluminescent dosemeter. Occupational categories include diagnostic radiology, interventional radiology, nuclear medicine, dental radiology,radiation therapy, industrial applications and so on. Data summary and statistics were conducted using the national radiation health information platform personal monitoring and management system.Results The annual personal average effective dose of radiation workers in Nantong was 0.273 mSv/a, The annual effective dose of all monitoring personnel is less than the annual dose limit of 20 mSv. The collective effective dose was 0.570 person·Sv. The annual effective dose per capita of interventional radiology was slightly higher (0.375 mSv/a), followed by nuclear medicine (0.316 mSv/a), and then diagnostic radiology (0.271 mSv/a), and the annual effective dose values of the other occupational classes were at relatively low levels. The average annual effective dose of radiological workers in different regions was not significantly different, and the per capita annual effective dose in Haian county (0.418 mSv/a) was slightly higher than that in other areas. The monitoring dose value of medical units below Second-senior class hospital (0.361 mSv/a) is higher than that of medical units above Second-senior class hospital (0.182 mSv/a) and industrial enterprises(0.143 mSv/a).Conclusion In 2016, the annual effective dose of radiological workers in Nantong city was at a low level. The radiation protection conditions of radiological workers in our city were good and the working environment was safe.