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针对核电站内高放射性、高湿热、强腐蚀的恶劣物化环境,设计制作了一种新型耐高温环氧树脂基中子屏蔽复合材料。该材料以AFG90-H环氧树脂为基体,在42 k Gy辐照环境下,其玻璃化转变温度可达262oC,弯曲强度仅下降1.63%,中子屏蔽性能明显优于常见高密度聚乙烯(High density polyethylene,HDPE)、石蜡、6002环氧树脂(Epoxy resin,EP)等材料。加入B4C颗粒后,材料中子屏蔽性能和耐高温力学性能得到显著提升,且耐酸碱腐蚀性能保持不变。综合实验表明,该复合材料具有耐高温、耐辐射、耐酸碱腐蚀等优点,且密度小,适合作为移动式探测设备中子屏蔽防护层使用。
A new type of high temperature resistant epoxy resin-based neutron shielding composite material is designed and manufactured for the harsh materialized environment with high radioactivity, high humidity and strong corrosion in nuclear power plants. The material with AFG90-H epoxy resin as the matrix, the 42 k Gy irradiation environment, the glass transition temperature of up to 262oC, bending strength decreased by only 1.63%, neutron shielding performance was significantly better than the common high-density polyethylene High density polyethylene, HDPE), paraffin, 6002 Epoxy resin (EP) and other materials. By adding B4C particles, the material neutron shielding performance and high temperature mechanical properties have been significantly improved, and the acid and alkali corrosion resistance remains unchanged. Comprehensive experiments show that the composite has the advantages of high temperature resistance, radiation resistance, acid and alkali corrosion resistance, and low density, suitable for use as a neutron shielding protective layer for mobile detection equipment.