长乐国际机场X射线行李包检查系统辐射剂量分析

Radiation dose analysis of the X-ray baggage inspection system at changle international airport

目的掌握长乐国际机场X射线行李包检查系统基本情况、放射防护及辐射剂量照射状况。方法采用X、γ辐射剂量巡测仪对该机场X射线行李包检查系统的辐射剂量进行检测,按照国家放射卫生标准,对各种型号的X射线行李包检查系统放射防护状况及周邻辐射剂量进行分析与评价。结果 26台X射线行李包检查系统各测点的最大测定值均小于5μGy/h,各种机型的X射线行李包检查系统防护性能基本相似,其设备外表及周邻环境的电离辐射水平的差异无统计学意义(P>0.05),而工作人员与旅客接受辐射剂量水平的差异有统计学意义(P<0.05)。结论长乐国际机场各种机型的X射线行李包检查系统防护性能基本相似,其辐射剂量均符合国家放射卫生标准要求;但工作人员年受照的辐射剂量超出国家放射防护标准规定的放射性豁免水平,应加强放射卫生防护规范管理;本次监测为今后长乐国际机场进一步开展放射防护工作提供了可靠的科学依据。

Objective To master basic conditions of the X-ray baggage inspection system, radiation prevention and radiaiton dose exposure at Changle international airport. Methods X, γ-ray radiation inspection instruments are employed to detect radiation dose of X-ray baggage inspection system and carry out analysis and evaluation of radiation prevention conditons and neighbouring radiation dose of various types of X-ray baggage inspection system according to national radiation health standards. Results The maxium measured radiation values of 26 X-ray baggage inspection systems were all less than 5μGy/h and the protection capacity of various X-ray baggage inspection systems were basically similar. There is no statistics significance（p0.05） of inonizing radiation level between instrument surface and circumjacent environment;There is a statistics significance（p0.05） in the difference of the accepted radiation dose levels between working staff and passengers. Conclusion The study shows that prevention capacity of X-ray baggage and goods inspection systems were basically similar at changle international airport, with a radiation dosage conform with National Radiation Sanitation Standard. however, annual radiation dose level measured in working staff was much more higher than that of the exemption values regulated by National Radiation Sanitation Standard. The radiation sanitation and safeguard criterion administration should be strengthened. And the present radiation measurement will provide reliable scientific basis for further radiation monitoring at changle Airport in the future.