Radon Concentration Measurement in Feed Grains by using SSNTD Type CR-39

Solid State Nuclear Track Detector (SSNTD) type CR-39 has been used to determine the radon concentration in samples of feed grains which are available in the local market in Samawah city, Iraq. Sixteen different samples of feed grains have been collected; some of them from Iraq and others were imported. These samples well have been ground using a ceramic mortar and then dried by electric oven to get the best data (that works to increase the surface area and reduce the moisture content). Optical microscope (CM001 CYANScope) has been used to calculate the number of tracks on the detector. The radon concentrations have been obtained by using the distribution technique within sealed-cup. The results indicate that the highest rate of radon found in the Nigella sativa (34.7Bq/m3) and the lowest rate of radon concentration was in the Vigna radiata and Medicago sativa (1Bq/m3).So, all feed grains that we tasted contain concentrations of radon, however it is within the allowable limits as recommended by the International Commission of Radiological Protection ICRP and The World Health Organization.