Radiological hazards due to natural radioactivity and radon concentrations in water samples at Al-Hurrah city, Iraq

This research focuses on study of natural radioactivity (226ra238u, 232th, 40k and 222rn) in different types of water samples at al-hurrah cityin najaf province/iraq using nai (tl) and rad-7 detector. materials andmethods: samples have been collected from three major sources of water,city water (drinking water), river water and underground water. the dailyconsumption of these three sources by humans in construction materialsdetermines the standards used to measure the radiological contamination inthese sources such as annual effective dose, radium equivalent, absorbeddose rate, external hazard indexes, internal hazard indexes and activityconcentration index due to gamma ray of long-live radioisotopes. results:the results show that the average of radioactivity concentration forradium-232 were 1.84±0.39bq/l, 2.31±0.43bq/land 7.15±1.88bq/l, forthorium-232 were 1.31±0.33bq/l, 0.98±0.13bq/land 2.19±0.44bq/l, forpotasium-40 were 9.07±1.32bq/l, 22.29±2.93bq/land 40.89±8.93bq/l andfor radon-222 were 35.5±0.00 mbq/l, 355.50±30.33 mbq/l and712.00±97.20 mbq/l. based on gamma radionuclides measurement, themean annual effective doses of city water and river water are lower than thereference level of the effective dose recommended by the icrp, while themean annual effective doses of underground water were higher than thereference level of the effective dose recommended by the icrp. conclusion:finally, the researcher found that all the radiological parameters such as raeq,d, hex, hin and iγ in the water samples were within the range the global limit,thus it’s safe to use in construction materials.