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Temperature Simulation of Thermal Plasma Melting Furnace for Disposal of Radioactive Waste and Preliminary Research of Vitrification Formula

Lin Peng1,Qin Yuxin2,Lv Yonghong1,Xiang Wenyuan1,Chen Mingzhou1,Liu Xiajie1(1.China Nuclear Power Technology Research Institute,Guangdong Shenzhen 518124; 2.Daya Bay Nuclear Power Operations and Management Co.,Ltd,Guangdong Shenzhen 518124)  
Radioactive waste treatment techniques currently used in nuclear power plant increase the volume greatly and bring much pressure on final disposal;Thermal plasma treatment as a crucial technique to reduce the waste volume is introduced.How to improve the efficiency of the plasma energy is the limiting factor of concern.In this paper,the temperature field of thermal plasma melting furnace is simulated,the maximal temperature of fixed bed melting furnace is calculated(about 1 445 ℃).According to the optional fire-resistant materials,the feasibility of furnace fabrication is discussed.Vitrification formulas for three typical radioactive wastes are tested with their feasibilities being analyzed then.Finally,the prospect of thermal plasma techniques of radioactive waste is discussed,and issues for future study are raised.
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