Radiation dosimetry on revegetated uranium mill tailings in western South Dakota

Abstract

Measurement of gamma radiation using thermoluminescent dosimeters on three uranium mill tailings areas and a control area showed exposure rates below ground depended on the amount and type of soil covering. Covering tailings with 30 cm of shale and 60 cm of topsoil reduced gamma radiation exposure belowground to rates similar to the control area. Soil covering of 30 cm was adequate to reduce gamma radiation exposure rates aboveground to background levels. Gamma exposure rates to small mammals were correlated to measurements belowground near the surface. Gamma radiation exposure to small mammals inhabiting uranium mill tailings exceeded standards recommended for the general public.

Citation

Rumble, Mark A. 1986. Radiation dosimetry on revegetated uranium mill tailings in western South Dakota. Northwest science. 60(3): 145-149