Evaluation of Radon Concentration and Annual Effective Doses in Some Imported Powder and Liquid Milk Samples Using Passive Track Detector

The radon and radium concentrations, mass and area radon exhalation rates, annual effective dose, and risk of an excess cancer fatality per million persons (CPPP) were measured for a total of twelve different types of powder and liquid milk samples collected randomly. CR-39 alpha track detectors were used to measure the concentrations. The average concentrations of radon and radium in the samples were 162 Bq/m3 and 0.47 Bq/kg, respectively. The average values of mass and area radon exhalation rates were 33 mBq/(kg day) and 396 mBq/(m2 day), respectively. The average annual effective radon doses for adults, children, and infants across all samples were 7, 13, and 56 µSv/year, respectively. The average CPPP values were 0.13 × 10–6, 0.24 × 10–6, and 1.00 × 10–6 for adults, children, and infants, respectively. The values were below the ICRP and UNSCEAR safe limit values. The results obtained indicate the absence of health risks.