Uranium bioassay and radioactive dust measurements at some uranium processing sites in Egypt—health effects
Abstract
The safety of radiation workers in the uranium mining industry requires close and continuous monitoring of their working conditions. In this study, external radiation surveillance, radioactive dust monitoring and the bioassay of uranium were carried out in some processing sites. As dust represents one of the most important sources of radiation exposure in mills and mines, dust monitoring and bioassays were performed for a sample of workers on the production lines. The concentration of uranium in air ranged from 22.6 × 10−7 to 11.1 × 10−5 Bq cm−3, and the exposure levels ranged from 1 to 80 µSv h−1. Laser fluorimetric determination of uranium in urine samples showed concentrations in the range 8.4–29.2 µg L−1. Renal function parameters, such as serum