2009—2011年石家庄市放射工作人员外照射个人剂量水平调查

Investigation on the level of individual dose of external Exposure for radiation workers in Shijiazhuang City from 2009-2011

目的掌握石家庄市放射工作人员受照剂量水平和防护现状,为今后放射防护工作提供依据。方法采用《外照射个人剂量系统性能检验规范》(GBZ 207-2008),利用热释光剂量测量法,每年监测6次。结果2009—2011年共有1 000多人连续3年接受外照射个人剂量水平的监测,年均剂量当量为1.99 mSv/a,集体剂量当量为9 556.14 man.mSv。市级医疗单位放射工作人员人均年剂量当量为2.68 mSv/a,居各放射单位之首;介入放射工作人员人均年剂量当量2.30 mSv/a,居各放射工种之首。结论正常工作条件下绝大多数放射工作人员的剂量是安全的,但仍需加强对个别单位和个别工种进行强制性剂量监测。加强全市放射工作人员防护知识培训,继续提高放射卫生防护水平。

[ Objective] To understand the dose level of radiation workers and their protection status in Shijiazhuang City, and provide evidence for future protection. [ Methods] According to the ＂System Performance Testing Specification for Individual External Dose ＂ GBZ 207-2008＂, the thermoluminescence dose meter method was adopted for annual monitoring of 6 times. [ Results ] Totally about 1 000 workers received 3 consecutive years monitoring of individual dose level of external radiation, with an average annual dose equivalent to 1.99 （ mSv/a-1 ） , collective dose equivalent to 9 556.14 man ~ mSv. The annual averaged dose equivalent of radiation workers in municipal medical units was 2.68 mSv/a which was the top of all radiation u- nits. The annual averaged dose equivalent of workers engaged in interventional radiology was 2.30 mSv/a which was the top of all kinds of jobs with radiation exposure. [ Conclusion ] Under the normal working conditions, most of the radiation workers are safe, but it is still necessary to strengthen mandatory dose monitoring on some individual units and individuals types of work. Protection knowledge training on radiation workers should be strengthened to improve the radiological protection levels.