2018年江西省职业外照射个人剂量达到调查水平分析

目的 调查2018年我省部分放射工作人员职业外照射个人剂量常规监测达到调查水平的原因，为行政部门正确决策提供技术支持。方法 对周期剂量达到或超过1.25 mSv/周期的放射工作人员发放《职业性外照射个人剂量监测剂量核查登记表》进行调查。结果 共发放核查表53份102人次，回收47份95人次，回收率88.68%，有7人次未反馈核查表。有15人次15.79%人员受到实际照射,其中5人次放射诊断工作人员，曝光时未关闭防护门。有80人次84.21%未受到实际照射。结论 绝大部分达到调查水平的放射工作人员未受到实际照射。5人次放射诊断工作人员工作时未关闭防护门，受到异常照射。介入医学、核医学和工业移动探伤工作人员在工作中受到异常照射的概率高。对未反馈的调查表进行可疑结果复核，年有效剂量均小于年剂量限值和审管水平。加强放射卫生防护监管，提高放射工作人员放射防护意识，进一步改进介入医学、核医学、工业移动探伤放射工作人员的放射防护管理和防护条件。

Analysis on individual dose reaching survey level of occupational external exposure in Jiangxi Province in 2018

Objective To investigate the reasons why the routine monitoring of personal dose of occupational external exposure of some radiological workers in our province reached the investigation level in 2018, so as to provide technical support for the correct decision making of administrative departments.Methods The registration forms for monitoring and verifying the personal dose of occupational external exposure were issued to radiation workers whose periodic dose reached or exceeded 1.25 mSv/ cycle.Results A total of 102 person-times were sent out in 53 verification forms, and 95 person-times were collected in 47 copies. The recovery rate was 88.68%, and 7 person-times did not feedback the verification forms. There were 15 cases of actual exposure, accounting for 15.79%, including 5 cases of radiological diagnostic staff, who did not close the protective door when operating exposure. Among them, the other 80 cases, accouting for 84.21% didn't receive actual exposure.Conclusion The vast majority of radiological workers who reached the survey level didn't receive actual exposure. 5 person-time radiological diagnostic staff, during the work did not close the protective door, subjected to abnormal radiation. Interventional medicine, nuclear medicine and industrial mobile flaw detection workers are at higher risk of abnormal exposures during their work. The suspicious results of the questionnaires without feedback were all less than the annual dose limit and the requirements of audit management. We will strengthen supervision of radiation health protection, raise the awareness of radiation protection among radiation workers, and improve radiation protection management and protection conditions for radiation workers in interventional medicine, nuclear medicine and industrial mobile flaw detection furtherly.