A Review of Gamma Doses and Radon Daughter Exposures for Workers in Some Canadian Uranium Mines from 1984 to 1987

In the light of the 1977 recommendations of the International Commission on Radiological Protection (ICRP 26), the Atomic Energy Control Board (AECB) proposes to amend the Atomic Energy Control (AEC) Regulations. The most basic change from the current Regulations is the introduction of the concept of effective dose equivalent. In order to explore some possible implications of the Proposed General Amendments to the Atomic Energy Control Regulations (PGAAEC), the doses and exposures of some Canadian uranium mine workers during the period 1984 to 1987 are analysed. As a basis for comparison, the distributions of annual gamma doses and radon daughter exposures for the entire worker population and for different job categories as percentages of the Maximum Permissible Dose and Exposure in the current Regulations are presented. Job categories of higher exposures and doses are identified.