我市 1998年先后发生三起放射源丢失事故 ,均为被盗所致。对环境及社会均产生了一定的不良影响。为了避免类似放射事故的发生 ,杜绝事故隐患 ,笔者对三起放射源丢失事故进行了分析。1　事故经过1.1　蓬莱市某水泥厂 ,1993年 3月从山东建材机械厂 ,购进料位自动控制设备两套 ,含 In 1998, there were three incidents of radioactive sources loss in our city, both of which were caused by theft. Have a certain adverse impact on the environment and society. In order to avoid the occurrence of similar radiation accidents and eliminate the hidden dangers of accidents, the author analyzed the accident of three radioactive sources lost. 1 Accident After a cement plant in Penglai City, in March 1993 from Shandong Building Material Machinery Factory, purchased two automatic level control equipment, including