Abstract:
Radon is a noble gas that is one of the natural radioactive decay products of radium resulting from the
disintegration of uranium. Humans are exposed to sources of natural radiation activity, being radon
and its progeny breathing air responsible for more than 50% of the annual dose received from natural
radiation. The aim of this study was to determine the radon concentration in the air in settlements’
dwellings and social objects and calculate the annual effective dose of population from radon on the
territory mining activities in Stepnogorsk area. The study has shown that activity concentrations of
indoor radon in the buildings ranged from 8 to 870 Bq · m −3
in Aqsu, 3-540 Bq · m −3
in Kvartsitka
located close to former gold mining sites. The Einh corresponding to the activity concentrations ranged
from 1-27 mSv · y
−1
received by the settlements’ public. The highest value of Einh in Aqsu School
reaches up to 68 mSv · y
−1
received by the critical group of public was found at the territory of former
mining the Stepnogorsk area. The results of this study show significant radiation hazards in Aqsu
School which located at the territory of former mining site, and there is evidence of radon health risk to
the members of the public.
