论文部分内容阅读
目的检测某新建钴-60辐照室周围工作场所放射性水平,保障放射工作人员和周围公众的健康安全。方法用6150AD6/H型辐射剂量当量率仪进行现场检测,用GMX出40P4-76型高纯锗γ谱仪和BL-4型低本底α、β测量仪检测分析贮源井水放射性水平,通过检测结果估算放射工作人员和公众受照剂量,依据管理目标值对结果进行评价。结果该辐照中心选址与布局均合理,辐照室二楼周围剂量当量率水平高于当地天然辐射本底水平,所检测的其他工作场所周围剂量当量率水平均在当地天然辐射本底水平范围内。贮源井水钴-60活度浓度和总β放射性水平均低于本实验室γ能谱仪和低本底α、β测量装置的探测下限。在辐照装置正常运行状态下,放射工作人员和公众估算的受照剂量均低于年剂量管理目标值。结论该辐照中心在正常运行状态下,其对放射工作人员和公众的健康影响在可接受的范围内,不会造成额外的健康损害。辐照中心在运行过程中应定期进行安全检查和检测,保证辐照装置的安全运行。
Objective To detect the radioactive levels in the workplace around a new cobalt-60 irradiation room to ensure the health and safety of radiation workers and the public around them. Methods 6150AD6 / H radiation dose equivalence rate meter was used for on-site detection. The radioactivity level of storage well water was detected and analyzed by GMX model 40P4-76 high purity germanium γ spectrometer and BL-4 low background α, β measuring instrument. Based on the results of the test, radiation workers and public exposure doses are estimated, and the results are evaluated according to the management target value. Results The site selection and layout of the irradiation center were reasonable. The dose equivalent ratio around the second floor of the irradiation room was higher than the local natural background level. The dose equivalence ratios around the other working sites were all at the local natural radiation background level Range. The activity level of Co-60 and the total β-radioactivity of the well were lower than those of the γ spectrometer and the low background α, β measuring device. In the normal operation of the irradiation device, radiation workers and the public estimated doses are below the annual dose management goals. Conclusion The health effects of this center on radiation workers and the public under normal operating conditions are within acceptable limits and do not cause additional health damage. Radiation Center in the operation of the process should be regularly carried out safety inspections and testing to ensure the safe operation of the irradiation device.