The experience of radiation monitoring in the Electrical Communication Laboratory was reported. Personnel monitoring, laboratory monitoring and field monitoring are main activities in the laboratory and have been carried out from 1962 to the present time.
The methods of monitoring and the working limits are almost followed to those used in the Japan Atomic Energy Research Institute. The personnel exposure to radiation, the frequency distribution of white blood cells, the radiation levels the contamination of floor surfaces in the laboratory and the concentration of radioactive waste water were measured and several practical data were obtained. These data showed that no significant exposure is present for the personnel. Furthermore, it was shown that the radiation levels are kept lower than the maximum permissible levels.
