A gamma scanner for pre-decommissioning monitoring and waste segregation

A gamma scanning measurement system has been developed which combines CCD camera and gamma detection technologies into an integral head capable of performing simultaneous visual and radiometric scans of contaminated nuclear plant areas. Deployment and operation of the measurement system can be carried out remotely and in both manual or pre-programmed scanning modes. This system has immediate applications for preliminary surveys prior to clean-out and decontamination operations in order to aide the planning of decommissioning operations. The in-situ identification and segregation of radiation hot spots will minimise cross-contamination onto clean material. (author)