Synthesis And Effect Evaluation Of γ Radiation Shielding Materials Containing Pyrite Cinder

With the development of nuclear power, people pay more attention to nuclearradiation protection. The main methods for radiation protection method (for externalexposure) are time protection, distance protection and shielding protection at present.The shielding protection material is used to absorb radiation to reduce the harm ofradiation, The development of radiation protection materials is a very important andurgent work to minimize radiation dangers.Concrete material is the most widely used radiation protection materials in theseradiation protection materials. Materials with high atomic number show goodshielding property for gamma rays, so iron and lead are commonly used as shieldingmaterials. Pyrite cinder from slag sulfate production and fly ash from plant are bothindustrial solid waste, and these materials to be used as raw material and additives forcover material, can not only save cement and fine aggregate, and improve theshielding property, but also is expected to achieve the purpose of the comprehensiveutilization of the waste and environmental protection. Therefore,18samples of pyritecinder-concrete, pyrite cinder-fly ash-concrete and lead-concrete shielding materialswith different mix proportions were prepared, and their radiation shielding propertywere analyzed. The main research contents and results are as follows:(1) NaI (TI) detectors and multi-channel pulse amplitude analyzer were used tomeasure the shielding rate and linear attenuation coefficient of pyrite cinder-concrete,pyrite cinder-fly ash-concrete and lead-concrete shielding materials, the shielding rateare61.7percent,61.6percent and64.0percent respectively, it is noted that these threekinds of shielding materials have certain gamma-ray shielding property, and they canbe used as shielding materials. Values of linear attenuation coefficient of these threekinds of shielding materials were compared, and we can find that the shieldingproperty of pyrite cinder-concrete is best, followed by pyrite cinder-fly ash-concreteand lead-concrete shielding materials, and the addition of fly ash has a slight effect on the shielding property.(2) Experimental values of total mass attenuation coefficient of pyritecinder-concrete, pyrite cinder-fly ash-concrete and lead-concrete shielding materialswere0.0645,0.0591and0.0658㎝2g-1, and theoretical calculation values were carriedout by using WinXCom software and then, the theoretical and experimental valueswere compared and the correlation coef cients have been obtained to be0.8865,0.9121and0.9274, respectively. It can be noted that the calculated and measurementvalues are in good agreement.(3) The hydraulic universal material testing machine was used to test themechanical properties of these shielding materials and it improved that the addition offly ash can improve their mechanical properties. The results show that shieldingmaterials containing pyrite cinder has a good performance in radiation protection, andthey can be used in the field of radiation protection.