Maze influence to radiological protection around industrial radiographic sources (Co-60) under 100 Ci

The shielded enclosure design around the gamma radiography facilities under 100 Ci cobalt-60 source was evaluated as well as the maze design and source positions contribution to the dose limitation consistent with the ALARA principle. It was found that the most effective maze type to shield gamma radiations was double (multiple by extension) corners maze type. From discussions on the source positions, practitioners should select the optimizing position from both left or right depending on the length of the maze in the case of a single corner type, but never at the central position. The obtained results provided an insightful contribution to the radiological protection in industrial radiography.