原子能科学技术Issue(6)：1147-1152,6.DOI:10.7538/yzk.2014.48.06.1147
铁元素对铝热剂SHS核废物固化体性能的影响
Effect of Iron on Performance of Simulated Nuclear Waste Form by Thermit SHS
秦志桂 1毛仙鹤 1蔡溪南 1赵康 1杨萍1
作者信息
- 1. 西北核技术研究所，陕西 西安 710024
- 折叠
摘要
Abstract
The effects of Fe element on the structures and chemical stability of simulated nuclear waste immobilized by the thermit self-propagating high temperature synthesis (SHS) were investigated .The composition ,microstructure ,thermal stability ,and the normalized release rate of the products were characterized by X-ray diffraction ,scanning electron microscope ,thermogravimetric and differential scanning calorimeter analysis , and product consistency test (PCT ) .The results show that the dominant crystalline phase of the immobilized SHS products is Al2 O3 ,and Fe has no significant effect on the composition and structure of the products .The products have dense and well-developed crystal structure .But the apparent porosities and apertures increase with Fe content . The products also have good thermal stability without obvious weight loss at the temperature lower than 1 400 ℃ .The leaching rate of Ce during 28 days is 10-5-10-6 g/(m2 · d) ,and there are no significant changes in the normalized release rates of Ce ,Ca , Si ,Al and Fe w hen the Fe content of the products increases from 1% to 10% .关键词
Fe/铝热剂/核废物/固化Key words
Fe/thermit/nuclear waste/immobilization分类
化学化工引用本文复制引用
秦志桂,毛仙鹤,蔡溪南,赵康,杨萍..铁元素对铝热剂SHS核废物固化体性能的影响[J].原子能科学技术,2014,(6):1147-1152,6.
