MEASUREMENTS OF NATURAL RADIONUCLIDES AND RADIOLOGICAL HAZARDS IN EGYPTIAN CEMENT AND GYPSUM

In the present work, The concentrations of natural radionuclides in Egyptian cement and gypsum measured by using Nal(Tl) and calculated its radiological hazards in investigated samples. The results obtained have shown that the highest values were 63±2.3, 13±4 and 161±13 Bq/kg for 226 Ra, 232 Th and 40 K respectively and the lowest values were 5±0.2, 0.2±0.03 and 55±4 Bq/ for 226 Ra, 232 Th and 40 K respectively. The radium equivalent activity (Ra eq), the external and internal hazard indices, the indoor absorbed dose rate and the corresponding annual effective dose were estimated for potential exposure risks of the cement samples. Also measured 222 Rn mass, area exhalation rate and radium content. The results obtained were compared with data from other countries.