【作者】 蒋琳； 刘荣正； 邵友林； 刘兵； 唐亚平； 刘马林；

【Author】 JIANG Lin;LIU Rong-zheng;SHAO You-lin;LIU Bing;TANG Ya-ping;LIU Ma-lin;Institute of Nuclear Energy and New Energy Technology,Tsinghua University;

【机构】 清华大学核能与新能源技术研究院；

【摘要】 高温气冷堆(HTGR)所用TRISO包覆颗粒的四层包覆层均采用流化床-化学气相沉积(FB-CVD)方法连续制备,利用模拟手段可以降低研究成本,获取包覆过程内部信息。针对燃料元件厂中现有的包覆燃料颗粒制备工艺,利用Aspen Plus软件开展全流程模拟和系统评估等工作。基于内嵌模块搭建缓冲层制备全流程模拟框架,其中包覆炉采用串联的平推流反应器和固体造粒器模块。根据仿真结果研究系统内物质和能量的综合利用效果,并探究表观流化气速、反应温度等工艺参数对包覆结果的影响。研究表明,系统流程模拟可以从宏观工程角度为高温气冷堆包覆颗粒制备物质流和能量流分析提供有益参考,对现有包覆燃料颗粒制备生产线的优化和经济性提高具有一定意义。更多还原

【Abstract】 Four coating layers of TRISO coated particles used in High-temperature Gas-cooled Reactor(HTGR) are prepared continuously by Fluidized Bed-Chemical Vapor Deposition(FB-CVD) method.Simulation tools can reduce the research cost and obtain internal information about the coating process.For the existing coating fuel particle preparation process in the fuel element plant,Aspen Plus software was used to carry out the full-flow simulation and system evaluation.The simulation framework of buffer layer preparation was established based on embedded modules,in which the coating furnace used a plug-flow reactor and a granulator in series.The integrated utilization effect of material and energy in the system was studied based on the simulation results.The effect of process parameters such as superficial fluidization gas velocity and reaction temperature on the coating results was investigated.It is shown that the system process simulation can provide useful references for the analysis of material and energy flow of HTGR coated particle preparation from a macroscopic engineering perspective,and has a certain significance for the optimization and economic improvement of existing coated fuel particle preparation production lines.更多还原