Estimation of annual external exposure and internal exposure dose rate for gamma ray from the Natural Radionuclides in cultivated, uncultivated and phosphate soil samples

The aim of this work, to estimate the External exposure, ingestion Exposure and inhalation exposure dose rate from gamma ray released from Natural Radionuclides in cultivated, uncultivated and phosphate soil samples in the area surrounding EL-Naser Factory for phosphate in El-Mahamid, Idfu, Aswan, Upper Egyp by using modeling, this model studied the exposure gamma radiation from different natural radionuclides 226 Ra, and 228 Ra, in samples, and also using conversion factors for all radionuclides for different ages according to ICRP 90. The activity concentration ranged for 226 Ra was 13.2 ±0.5 – 34.3±1.3 and for 228 Ra was 12.2±0.524.4±0.9, for 226 Ra was 5.5±0.3 41.8 ±1.5 and for 228 Ra was 4.0±0.2-22.0±0.8 and for 226 Ra 20.7±0.7 590.9±19.2 and for 228 Ra was 125.1±42 – 277.4±1.5 for cultivated, uncultivated and phosphate soil samples respectively.