الفهرس 
Over view of phosphate rock and samplingOnly 14 pages are availabe for public view
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Abstract
Phosphate is one of the most important industrial rocks used as fertilizer and production of phosphoric acid all over the world. The biggest producing countries in Africa are Morocco, Algeria and South Africa Republic.The exploitation of phosphate rocks represents some radioactive hazards due to their content of some radionuclides represented by uranium, thorium, radium and potassium.The aim of this work is to measure and determine content of the study phosphate rocks in 238U, 232Th,226Ra, and 40K by using gamma radiometric instrument. To assess the radiological risk in Kanzi phosphate rock, samples have been taken from the area and brought to Cairo (Egypt) and there at the Egyptian Training Research reactor, ETRR-2, a germanium instrument has been used to determine the activity for each sample and calculations have been made to determine the radium equivalent activity, the annual effective dose rate and Hazard indices. The U-238/R-226 specific activity showed an average value of 762±30, Th-232 showed an average of 52±2 and K-40 showed a value of 94±16 as average.