陶瓷UO2畸形球的控制方法  

THE CONTROL METHOD OF ODD SHAPED MICROSPHERES

作　　者：徐志昌[1] 唐亚平[1] 符晓铭[1] 

机构地区：[1]清华大学核能技术设计研究院

出　　处：《核科学与工程》1999年第4期355-360,共6页Nuclear Science and Engineering

摘　　要：研究了用于高温气冷核反应堆燃料核芯中畸形球的种类、产生机理及其控制方法。在500 ℃以下空气中进行了脱碳研究，结果发现破裂球(缺裂球、沟槽球等)的产生基本上来源于干球的不完全脱碳所致。在振动分散条件下进行了溶胶的分散研究。结果发现，孪生球和椭圆球的形成基本上来源于溶胶的不均匀分散所致。因此，为了控制和防止上述两类畸形球的形成，最重要的方法是，(1)必须在一定脱碳程序下供给必要的空气量，确保脱碳完全；(2)必须采用合理的溶胶参数下保持均匀分散，以保证球形均匀。Sort, form mechanism and its control method for odd shaped UO２ ceramic microspheres were investigated for high temperature gas cold reactor. Decarbonisation is studied in air at temperature below 500 ℃ and the results show that crack shaped microspheres were caused by nonentiring decarbonisation. Spray studies were made in vibrating nozzle and the results show that elliptic and twin shaped microspheres were caused by the nonuniform spray. Therefore, perfect decarbonisation and uniform spray is the best control method of odd sha ped microspheres.

关 键 词：高温气冷核反应堆 溶胶-凝胶工艺 燃料核芯 畸形球 堆芯 陶瓷氧化铀 控制方法 

分 类 号：TL424[核科学技术—核技术及应用] TL211.1