Investigation of the effect of adding different oxides on the attenuation coefficient of different concretes for photonic radiation using MCNPX calculation code

The increasing development of various aspects of the nuclear technology, including its uses in industry, medicine, electricity generation, etc., resulted in the increment of the amount of emitted radiations, so that the protection against the emitted radiations becomes more important. Therefore, a lot of researches are being done on the different compounds, mixtures and pure materials to make the different shields. In this research, eight different oxides and three concretes with the different compositions have been used to make the different concrete shields. The attenuation coefficient of these shields has been calculated for two energies of 662 and 1460 kV. The results showed that the combination of thallium oxide with all three types of concretes has the highest attenuation coefficient against the photonic radiations comparing to other oxides due to have the highest density. Among the concretes, Mo concrete has the highest attenuation coefficient between all of the concretes due to have the highest density, which can be resulted in the high percentage of the iron in its compositions. As a result, the highest attenuation coefficient, obtained in this study, is related to the new concrete shield that obtained from the combination of Mo concrete and thallium oxide. The results of this research can be used to design and create the different shields and how to mix the amount of their compositions.