Abstract: To draw experience and lessons, preventing new occurrences, the industrial gamma-ray radiographic incidents had happened in recent ten years from 2004 to 2013 were summarized by analyzing their categories, levels, consequences and causes to provide technical reference in preforming similar practices in future. From 2004 to 2013, 17 industrial gamma ray detection accidents were listed in all with source lost or stolen incidents as the majority, three of which caused over exposure. 94% of the total 17 incidents belong to large or major incident, mainly attributed to human factors induced lack of safety measures. The utilization of Industrial gamma-ray radiography units should strictly abide by the Radiation Safety Requirements about the Gamma-ray Detection Device, and be imposed under stringent security supervision to foster safety culture preventing accidents.

Key words: industrial gamma ray detection, radiation accident, reason, countermeasure