[en] The experience is reported which was gained in 1974 with a central reporting, registration and data processing system for radiation doses received by workers in nearly all of the national nuclear power plants. The number of people controlled by the National Film Dosimetric Service mounted to 11,490. Also, the development of an automated thermoluminescence dosimetry system made good progress, especially the output equipment which underwent improvement. This system has the possibility of replacing film dosimetry in the future at the National Service. In the meantime, the system found some interesting applications, among which is testing the admissability of radiological caries control in large groups of the population by measuring the local dose received orally. Whole-body counting was used for contamination control of personnel in nuclear power plants, for which purpose a Ge(Li) detector was introduced. A study was begun on the use of ⁴⁰K as a tracer in the determination of the ratio of lean versus fat body mass in man