热等离子体处理模拟放射性废物试验研究  

Experimental Study on Simulated Radioactive Wastes Vitrification with Arc Plasma

作　　者：徐文兵[1] 吕永红[1] 陈明周[1] 黄文有[1] 李晴[1] 

机构地区：[1]中科华核电技术研究院有限公司,广东深圳518124

出　　处：《核动力工程》2015年第6期175-179,共5页Nuclear Power Engineering

摘　　要：为验证等离子体系统对无机废物的处理效果,采用电弧等离子体发生器产生的热等离子体处理模拟放射性废物——棉制品焚烧灰。研究了等离子体发生器的电、热特性,通过数值模拟的方法分析从发生器阳极喷嘴喷射出的等离子体射流的温度分布。试验中对熔融体进行冷却得到固化体。对固化体的分析结果表明:固化体呈玻璃态,抗压强度远远大于水泥固化体7 MPa的要求;从玻璃体的成分判断,该固化体的性能可以满足相关浸出率方面的要求。To evaluate the treatment effect of inorganic waste with plasma system, thermal plasma generated by a plasma torch was adopted to treatment the simulated radioactive waste, the simulated incinerator ash. The electrical and thermal characteristics of the plasma torch were studied. The temperature distribution of plasma jet was examined via numerical simulation. Vitrified waste form was obtained by cooling the molten. Several analyses were carried out for the waste form. And the results show that the solidified waste appears glassy, with the compressive strength much more than 7 MPa, which is the limited value for cemented waste form. Based on the composition of the vitrified waste form, it can be concluded that its leaching resistance performance should be fairly good.

关 键 词：模拟放射性废物 热等离子体 熔融 玻璃固化 

分 类 号：TG115.22[金属学及工艺—物理冶金]