The national dose register in Finland.

The Finnish Dose Register includes exposure data for all workers engaged in radiation work. These data already cover a period of almost 50 y. The earliest data in the register apply to workers in health care, research and industry. Data on nuclear power plant workers have been recorded since 1977 and data on aircrews since 2001. The Dose Register is an extensive national register with doses currently recorded for more than 15,000 workers annually. This paper presents the content and structure of the register, together with recently completed and forthcoming reforms. It also describes how the recorded data are used in the regulatory control of radiation practices.