模拟高放废液钛酸盐陶瓷固化体的浸出影响因素研究  

STUDY ON THE LEACHING BEHAVIOR OF TITANATE CERAMIC WASTE FORM IMMOBILIZING SIMULATED HLLW

作　　者：李利宇[1,2] 罗上庚[1,2] 汪德熙[1,2] 

机构地区：[1]中国原子能科学研究院 [2]清华大学核能技术设计研究院

出　　处：《辐射防护》1997年第5期373-378,共6页Radiation Protection

摘　　要：本文采用ＭＣＣ－１静态浸出实验方法对动力堆模拟高放废液钛酸盐陶瓷固化体浸出影响的因素进行了研究。实验表明，钛酸盐陶瓷固化体的浸出过程是一个受许多因素影响的复杂过程，浸出时间、浸出温度、浸出剂组成及ｐＨ值等都会对包容核素的浸出率产生一定的影响。在本实验范围内，钛酸盐陶瓷固化体的浸出率与浸出时间之间可以用经验方程ｌｎＲ＝ａ＋ｂｌｎｔ（Ｒ为浸出率，ｔ为浸出时间，ａ、ｂ为常数，浸出剂为去离子水，浸出温度为９０℃，浸出时间为３～２８ｄ，浸出率为Ｃｓ、Ｓｒ、Ｍｏ、Ｂａ的元素浸出率及固化体的质量浸出率）来描述。浸出温度对固化体浸出性能的影响程度表现在浸出过程的表观活化能上，钛酸盐陶瓷固化体质量和各元素浸出过程的表观活化能仅约为１０～２０ｋＪ／ｍｏｌ，小于硼硅酸盐玻璃固化体。The leaching behavior of titanate ceramic waste form is very complex.A lot of factors,such as leach time ,leach temperature,composition and pH of leachant can effect its leachability. In this study an empirical equation ln R = a + b lnt is used to describe the relationship between the leach rate and leach time of titanate ceramic waste form.The influence of temperature on the leachability of this waste form can be described in terms of the average activation energy.The average activation energies for elemental and mass loss from this waste form are very low in comparison with those of borosilicate glass waste form. (

关 键 词：高放废物 钛酸盐陶瓷 固化体 浸出行为 

分 类 号：TL942.201[核科学技术—辐射防护及环境保护]