New portable gamma-camera for nuclear environment and its application at rehabilitation works

Industrial prototype of portable gamma camera for nuclear environment was developed. Camera has new 2D position sensitive detector (PSD), which is based on generally used components as image intensifier with MCP and digital video camera with an industrial CCD. The gamma image is formatted on PSD by two-cone collimator or coded mask. The dimensions of detecting head are ~ L=50 cm and D=12 cm. Scintillating plate has useful diameter 38 mm and thickness from 1 up to 4 mm, depending on aperture used. Two co-ordinate scanning unit is assigned for distant choice of device field of view. A special portable computer is used for control of all gamma camera subsystems by operator, for processing of gamma images, storage and displaying and for operation with images. Standard distance between detecting head and computer is 50 meters. The results of application of gamma-imaging during rehabilitation activity at territory of temporal storage of radioactive wastes of RRC Kurchatov Institute are presented and discussed.