核电厂放射性废液水泥固化体的制备

Preparation of Cement Solidification of Radioactive Liquid Waste in Nuclear Power Plant

针对某核电厂复杂成分的中、低放射性废液水泥固化体制备过程中出现的流动度损失快、泌水分层、凝结时间难控制等问题,通过实验研究掺合料、保水增稠材料、投料顺序等因素对放射性废液水泥固化体流动度、保水性能、凝结时间、固化体性能的影响规律。研制出既满足国家标准GB 14569.1—2011又适用于现有工程装置的放射性废液水泥固化体专用添加剂及配方,即专用添加剂配方为粉煤灰∶稠化粉∶外加剂A质量比=1∶1∶0.15,水泥固化体配方为水泥∶专用添加剂∶废液质量比=1∶0.272∶0.585。

Aiming at the problems in the preparation of cement solidification of intermediate and low level radioactive liquid waste with complex components in a nuclear power plant,such as rapid fluidity loss,bleeding and laminate,difficult control of setting time,etc,the effects of admixtures,water retaining and thickening materials and feeding sequence on the fluidity,water retaining performance,setting time and properties of radioactive liquid waste cement solidification were studied.A special additive and formula for radioactive liquid waste cement solidification have been developed,which not only meets the national standard GB 14569.1-2011,but also applies to existing engineering units.The special additive includes fly ash,thickening powder and admixture A in the mass ratio of 1∶1∶0.15,and the formula of cement solidification includes cement,special additives and liquid waste in the mass ratio of 1∶0.272∶0.585.