Coal and soil samples from Baganuur Coal Mine (BCM) of Mongolia have been investigated. The activities of
have been measured by gamma‐ray spectrometry using shielded HPGe detector. Contents of natural radionuclide elements (U, Th and K) have been determined. Also the activities and contents of radionuclide of ashes were determined which generated in Thermal Power Plant ♯3 of Ulaanbaatar from coal supplied from BCM.