EFFECT OF THE WATER-CONTENT IN ILMENITE LIMONITE CONCRETE SHIELDS ON THE RADIATION ATTENUATION

In this experiment the physical and structural properties together with the radiation attenuation for ilmenite limonite concrete heated at different temperatures up to 400-degrees-C have been studied. The gamma rays have been measured by Harshow TLD ribbons while solid state nuclear track detectors (both the macrofol and LR-115) have been used for the measurements of fast neutrons. The decrease in the compressive strength and in the unit weight of ilmenite limonite concrete upon heating up to 500-degrees-C have been determined. Also the decrease in each of the gamma rays linear attenuation coefficients, fast neutrons macroscopic total cross sections and the gamma rays and fast neutrons shielding values of ilmenite limonite concrete upon heating up to 400-degrees-C have been evaluated and compared with their corresponding values at room temperature respectively on heating up to 400-degrees-C. Both the gamma and fast neutron shielding values decrease by 9.92% and 20.4% of its values at room temperature respectively upon heating to 400-degrees-C.