A state-of-the-art report on the laser decontamination and gamma camera

Survey on the development status has been performed on the laser as the device of a radioactive surface decontamination and gamma camera as the device of a contamination measurement. The laser is directly applied to a radioactive contamination on the metal or the concrete surface, then the contamination is removed. Its method has the follow advantages; noncontact method, selective removal of contamination area, negligible amounts of additional waste generated. Laser cleaning process is completed at a cooling state before waste generated. Laser cleaning process is completed at a cooling state before the heat wave propagate to substrate and the contamination material is filtered by the suction device. The gamma camera show a contaminated nuclide and pattern with 2-dimension by remote measurement. The gamma camera is consist of 3 part; collimated radiation measurement part, CCTV image process part, distance measurement part. Therefore, if a radiation position and level are defined by the gamma camera and the laser device is used with remote control, it is very useful at decontamination and decommissioning of the nuclear facility. (author). 44 refs., 4 tabs., 34 figs