摘要
中核北方核燃料元件有限公司(CNNC)建造的高温气冷堆(HTGR)核燃料元件生产线在采用外凝胶(EGU)工艺制备UO_2核芯时,存在煮胶液沉淀、分散-胶凝过程中胶液流量无法实现精准控制和凝胶球裂口等问题。为解决这些工程化问题,对凝胶球制备工艺和设备进行了优化和改造,并试生产了10批次的UO_2核芯进行验证。结果表明,改进后的生产线可连续稳定的实现工业化生产,UO_2核芯产品合格率超80%。
China North Nuclear Fuel Co. Ltd （CNNC） built a HTGR nuclear fuel element production line. In this production line, the gel ball is mainly prepared by external gelation of uranium process （EGU）. In the engineering research process, the problems such as the paste liquid deposition and the gel liquid flow can not be controlled accurately during Sol-gel, and gel ball cracks occur. In order to solve these engineering problems, the gel ball preparation process and equipment were optimized and modified, and 10 batches of UO2 kemels were tested and verified. The results show that the improved production line can achieve continuous and stable industrial production, and the qualified UO2 kernel products are over 80%.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2018年第1期75-78,共4页
Nuclear Power Engineering
