REMIX燃料可行性与乏燃料特性分析  

Analysis of Feasibility and Spent Fuel Characteristics of REMIX Fuel

作　　者：金志威 张庚 夏兆东[1] 朱庆福[1] JIN Zhiwei;ZHANG Geng;XIA Zhaodong;ZHU Qingfu(China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《原子能科学技术》2023年第10期1949-1955,共7页Atomic Energy Science and Technology

摘　　要：为验证REMIX(回收铀钚混合氧化物)燃料在典型M310堆型上的适用情况并评价其源项和释热特性,使用CMS程序包研究了REMIX燃料再生组件的堆芯物理特性,设计了合理可行的30%REMIX燃料堆芯燃料管理方案。以此为基础,分析了REMIX乏燃料中钚含量和天然铀节省量变化趋势,以及REMIX燃料在燃耗状态下的源项和释热特性,并与普通AFA3G组件乏燃料进行了对比。结果表明,5次REMIX再生循环是可行的,能够显著降低天然铀消耗量,具有较好的应用价值,同时也为后续REMIX燃料加工工艺设计以及整体经济性分析提供了必要的输入条件。A new fuel technology named REMIX(REgenerated MIXture of uranium and plutonium oxides)based on the spent nuclear fuel of light water reactors and fast reactors has come into being in the pursuit of closed fuel cycle in many countries.It was first raised in Russia as a possible way to reduce spent nuclear fuel storage.In traditional spent nuclear fuel reprocessing progress,uranium and plutonium are separated after the codecontamination cycle.For REMIX fuel,the uranium and plutonium nuclides from spent nuclear fuel can be used together without a further separation,which brings the benefits in natural uranium consumption reduction and nuclear non-proliferation.This article aims at validating the feasibility of 5 recycles and analyzing the radiation and decay heat characteristics of spent REMIX fuel.The CMS code package was used in core calculation,and the spent nuclear fuel characteristics were calculated through the SNF program in the package.A typical M310 reactor core was chosen as the target reactor in this article,30%REMIX FA(fuel assembly)loading fuel management for 5 REMIX recycles was primarily researched,in which enriched uranium was added to the reprocessed fuel of uranium and plutonium.The REMIX core,which contains 30%(48 of 157)REMIX FA,meets equilibrium after three cycles while the REMIX FA from the former recycles can be completely replaced by the new REMIX FA manufactured in the next recycles at the same time.The spent REMIX fuel was gathered and mixed with fresh fuel after a 5-year cooling.The radiation and decay heat characteristics of the cooled spent nuclear fuel were analyzed,which helps the design of radiation shielding during separating the dissolved fuel rods and manufacturing new FA.The results show that the 30%REMIX FA loading fuel management plan can be used in the M310 core without changing the basic neutronics and safety design of the reactor.The feasibility of 5 recycles was proved.Although the spent nuclear fuel may be recycled more than 5 times,the nuclides in the spent nuclear fuel of

关 键 词：REMIX燃料 燃料管理 乏燃料 天然铀节省量 闭式循环 

分 类 号：TL249[核科学技术—核燃料循环与材料]