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目的掌握北京市海淀区2013年放射工作人员外照射个人剂量监测的基本状况,以制定有效的个人剂量监测方案,巩固和促进该地区个人剂量监测工作。方法使用Li F(Mg,Cu,P)热释光剂量计(TLD)定期监测,建立该区Access个人剂量数据库并用SPSS软件进行处理分析,依据国家有关法律法规和技术标准进行评价。结果 2013年该区外照射人均年剂量为0.138(检测下限)、0.138~2.000、0.138~2.000 m Sv/a的人数分别占总监测人数的81.4%、18.4%和0.2%;2013年人均年剂量为0.16 m Sv/a;医用辐射人员的集体剂量和人均剂量分别为297.6人·m Sv和0.17 m Sv/a,分别高于非医用辐射人员的131.6人·m Sv和0.14 m Sv/a;医用辐射中,核医学、介入放射学、放射治疗、医用X射线诊断人员的人均年剂量依次降低,分别为0.29、0.21、0.18和0.16 m Sv/a;非医用辐射中,核仪表、防护检测、科研用同位素人均年剂量分别为0.22、0.16和0.15 m Sv/a,其余工种人均年剂量为0.13 m Sv/a。结论该区绝大多数放射工作人员的个人剂量水平较低,相应的放射工作环境是安全的;在放射防护实践中应加强重点工种人员的个人剂量监测与防护,同时应加强异常剂量的核查与调查工作。
Objective To master the basic status of personal dose monitoring of radiation workers in Haidian District of Beijing in 2013 so as to formulate an effective personal dose monitoring plan to consolidate and promote personal dose monitoring in this area. Methods Periodic monitoring was carried out using LiF (Mg, Cu, P) thermoluminescence dosimeter (TLD). The database of Access personal dose in this area was established and analyzed by SPSS software. The data were evaluated according to relevant national laws, regulations and technical standards. Results In 2013, the per capita annual dose of external exposure of this area was 0.138 (the lower limit of detection), and the numbers of 0.138 ~ 2.000,0.138 ~ 2.000 m Sv / a accounted for 81.4%, 18.4% and 0.2% Was 0.16 m Sv / a. The collective dose and per capita dose of medical radiographers were 297.6 mSv and 0.17 mSv / a, respectively, which were 131.6 mSv and 0.14 mSv / a, respectively, for non-medical radiographers. In medical radiation, the annual average dose of nuclear medicine, interventional radiology, radiation therapy and medical X-ray diagnosis personnel successively decreased, respectively, 0.29,0.21,0.18 and 0.16 m Sv / a; in non-medical radiation, the nuclear instrument, the protective test , And the annual per capita annual dose of isotopes for scientific research was 0.22, 0.16 and 0.15 m Sv / a, respectively. The average annual dose of other isotopes was 0.13 m Sv / a. Conclusion The radiation dose for the vast majority of radiation workers in this area is relatively low, and the corresponding radiation working environment is safe. In the practice of radiation protection, individual dose monitoring and protection should be strengthened for key workers, and at the same time, verification of abnormal doses should be strengthened. Investigation work.