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目的了解2012—2015年廊坊市放射工作人员外照射个人剂量水平,为放射防护管理工作提供科学依据。方法:按照GBZ 128-2002《职业性外照射个人剂量监测规范》的要求,在2012—2015年间,对廊坊市放射工作人员采用热释光个人剂量监测,每季度1次,对结果进行统计分析。结果 2012—2015年廊坊市放射工作人员人均年剂量当量为1.11 mSv;不同的职业中,介入放射工作人员所受剂量当量最高为2.01 mSv,明显高于其它类别的放射工作人员,差异有统计学意义,(χ~2=136.539,P<0.01);2012—2015年个人剂量监测人数分别为713、805、867、959,年均剂量当量分别为1.21、1.16、1.06、1.02 mSv,有逐年递减趋势,差异有统计学意义,(χ~2=32.224,P<0.01);100%的放射工作人员年剂量当量<20 mS v。结论廊坊市放射工作人员的工作环境基本符合要求,放射防护管理工作稳步加强,今后应以介入放射工作人员作为重点管理对象,同时要坚持做好放射工作人员个人剂量监测工作。
Objective To understand the personal exposure dose of radiation workers in Langfang City from 2012 to 2015 and to provide a scientific basis for radiation protection management. Methods: According to GBZ 128-2002 “Occupational exposure to external dose of personal dose monitoring” requirements, between 2012 and 2015, the radiation workers in Langfang City, using personal dose monitoring of luminescence, once a quarter, the results were statistically analyzed . Results The per capita annual equivalent dose of radiation workers in Langfang City was 1.11 mSv between 2012 and 2015. The highest equivalent dose of intervention workers was 2.01 mSv among different occupations, which was significantly higher than that of other radiation workers. The difference was statistically significant (Χ ~ 2 = 136.539, P <0.01). The individual dose monitoring numbers from 2012 to 2015 were 713,805,867,959 and the average annual dose equivalents were 1.21, 1.16, 1.06 and 1.02 mSv, respectively, The trend was statistically significant (χ ~ 2 = 32.224, P <0.01). The annual equivalent dose of 100% radiation workers was less than 20 mSv. Conclusion The work environment of radiation workers in Langfang basically meets the requirements, and the work on radiological protection and management has been steadily strengthened. In the future, interventional radiological staff should be the key management targets, and at the same time we should do a good job of monitoring the personal dose of radiation workers.