A Rapid Method for Radon Determination

Research carried out in last decades has shown that more than 70% of a total annual radioactive dose received by people originates from natural sources of ionizing radiation, whereby 40% is due to inhalation and ingestion of natural radioactive gas radon ²²²Rn and its progeny. Radon has 3.5 days of half-life. However, its progeny is dangerous than Radon in the view of radiation protection. Radon measurement is commonly used in controlling radon concentration in underground mine, closed room and in forecasting earthquake. Radon gas emission rate in the immediate opening of the west ventilation shaft depends on the operation of the ventilation system, duration of ventilation system operation, and the air flow rate through the underground development. Specific activity of radon progeny in air (RaA (Po-218), RaB (Pb-214) and RaC (Bi-214)) and Ra-222 in radioactive equilibrium was calculated by formula 1 and 2, respectively. We include result of measurement carried out in the air around a mining. In Fig.2 shown that the distribution of Po-218, Pb-214, Bi-214 and Ra-222 isotopes releasing from west ventilation shaft in Gurvanbulag underground uranium mine in the eastern part of Mongolia