Preparation and Shielding Performance of Gamma Ray Shielding Composite Materials Based on 3D Printing Technology

Abstract Excessive gamma-rays will be emitted when a nuclear power plant is under the refueling overhaul, leading to certain number of hotspots. To meet shielding requirements these hotspots complex components, nylon-tungsten composite material was developed by laser selective sintering 3D printing technology. The effects performance materials were emphatically studied for two preparation processes (including mechanical mixing method and coating method) powders. Experimental results show that with tungsten content 70–85% obtained technology, which realizes manufacture mold-free customized bonded materials. prepared technology better than in performance. When mass ratio powders 80%, linear attenuation coefficient can reach 0.32, best formula used components. All lay theoretical foundation engineering application