Abstract
The paper explores the abundance of natural radionuclides ( 226Ra, 232Th and 40K) in the main types of host rocks available at the Yeniseiskiy site (Archaean gneisses and dolerites). The study shows that the host rocks do not pose any risks associated with personnel exposure in the underground structures, radiation contamination of the environment and are characterized by low effective specific activities, i.e., the rocks are authorized to be used in all types of construction. The paper considers the abundance of radionuclides characterized by low average concentrations with the exception of 232Th. It demonstrates the differences in the activity and abundance of natural radionuclides between the upper part of the rock massif (to a depth of 150 m) and its deep-seated part, as well as lower concentrations of uranium in the upper part of the massif. It roughly estimates the groundwater potential as regards uranium carry-over from the upper zone.
Published Version
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