放射性同位素与射线装置由于其有潜在性危害，一旦发生事故，将导致不同程度的人员健康损伤，在社会上产生较大负面影响。因此，放射事故的预防及控制一直是各级放射卫生防护部门工作重点之一。随着放射性同位素的应用范围不断扩大，放射事故特别是小型放射源丢失事故的发生呈 Radioactive isotopes and radiation devices are potentially harmful. Once an accident occurs, it will result in varying degrees of health damage to personnel and will have a greater negative impact on society. Therefore, the prevention and control of radiation accidents have always been one of the focuses of the radiation protection departments at all levels. As the scope of application of radioisotopes continues to expand, the incidence of radiological accidents, especially those involving small radioactive sources, has risen