2012-2014年淮安市医学放射工作人员个人剂量监测结果分析
Analysis on Personal Radiation Exposure Monitoring Results in Medical Radiation Workers in Huai'an from 2012 to 2014
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摘要:
目的 分析淮安市医学放射工作人员个人剂量水平及分布情况，为放射防护管理工作提供基础依据。
方法 依据GBZ 128-2002《职业性外照射个人监测规范》的要求，采用热释光剂量方法对淮安市医学放射工作人员开展个人剂量监测工作，工种主要包括诊断放射学、介入放射学、核医学、放射治疗，采用放射工作人员职业健康管理系统对2012-2014年监测结果进行汇总统计以分析剂量分布特征。
结果 2012-2014年共监测2 540人次，人均年有效剂量为0.62 mSv，3年人均年有效剂量分别为0.39、0.64、0.76 mSv。所有受监测放射工作人员年有效剂量均低于20 mSv，其中99.96%年有效剂量低于5 mSv，人均年有效剂量较大的工种为诊断放射学（0.64 mSv）和介入放射学（0.55 mSv）。
结论 淮安市医学放射工作人员年有效剂量水平均低于剂量限值，现有工作条件和环境是安全的，人均年有效剂量呈逐年增高趋势，应进一步加强放射卫生监督管理工作。
Abstract:Objective To measure personal radiation exposure dose and its distribution among medical radiation workers in Huai'an, and to provide a basis for radiation protection management.
Methods According to the requirements of the Specifcations of Individual Monitoring for Occupational External Exposure(GBZ 128-2002), the personal radiation exposure dose of medical radiation workers was monitored using thermo luminescence dose method in departments of diagnostic radiology, interventional radiology, nuclear medicine, and radiation therapy. The monitoring results from 2012 to 2014 were retrieved from the occupational health management system for radiation workers to analyze personal dose distribution characteristics.
Results Of the 2 540 radiation workers monitored from 2012 to 2014, the annual average effective dose was 0.62 mSv, and the value for the selected three years was 0.39, 0.64, and 0.76 mSv, respectively. All monitored radiation workers' annual effective doses were lower than 20 mSv, in which 99.96% reported less than 5 mSv. The radiation workers in diagnostic radiology(0.64 mSv) or interventional radiology(0.55 mSv) reported greater average annual effective dose than others.
Conclusion The annual effective radiation exposure dose of medical radiation workers in Huai'an is lower than the national limit, indicating safe working conditions and environment during the monitored period. However, the increasing average annual effective dose suggests the need of strengthened supervision and management of radiation health.
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