The radiological impact of a radium rich by-products deposit : methodology of assessment

Radiological impact due to the deposit of radium rich by-products can be assessed by: The characterization of the source-term based on the measurement of 226Ra content and 226Ra activity concentration in soil, area exhalation rate of 222Rn from the deposit and external dose rate in air, the measurement of the activity concentration of 222Rn in air above the ground, the study of the transfer of 222Rn in the neighbourhood of the deposit with the same measurements as above. The assessment can be followed by the radiological monitoring of the environment over more or less long periods of time consisting of the potential a energy at several stations, according to the protocol designed on the former results. (author)