多孔铀基合金燃料设计及制备技术

项目名称： 多孔铀基合金燃料设计及制备技术

项目编号： No.91226203

项目类型： 重大研究计划

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 张鹏程

作者单位： 中国工程物理研究院

项目金额： 500万元

中文摘要： 核能是解决能源危机的主要途径。磁约束聚变-裂变次临界混合堆能源系统作为聚变能应用的中间环节，能解决今后几十年的能源问题。而次临界裂变堆燃料的设计制造，成为混合堆应用的关键技术和先决条件之一。本研究团队在国内率先提出粉末冶金法制备多孔二元及三元铀基合金的技术路线，设计并制备高温相稳定、尺寸稳定及热力学稳定的多孔铀基合金。在此基础上，结合混合堆裂变包层工况，采用团簇理论设计二元及三元铀基合金，按照熔炼铸造-制粉-压制成型-热轧或热等静压包覆工艺路线制备含一定孔隙度的铀合金燃料材料，在分析测试相关性能的基础上，预测其抗辐照能力。研究将探索出一条粉末冶金制备铀基合金的技术路线，为我国铀基合金燃料设计及制备奠定基础。

中文关键词： 铀合金；核燃料；多孔；辐照稳定性；相稳定性

英文摘要： Nuclear energy utilization is one of the main ways to solve energy crisis. Magnetic confinement fusion-fission mixed reactor as the technology of transition can solve the problem of energy shortage. While design, preparation and life prediction of sub-critical fission nuclear fuel become one of the critical technology and principal condition in application of fusion-fission mixed reactor. Our group firstly use powder metallurgy process technique to perpare porous binary and ternary uranium based alloys which have the properties of high temperature phase, size and thermodynamics stability. As the previously research foundation and considering the application condition of the mixed reactor fission envelope, innovative cluster theory is used to design binary and ternary porous uranium fuel-based alloys which are prepared by smelting, powder preparation, compaction, hot rolling or hot isostatic presses method wrapping. Then radiation resistance ability of the alloys can be predicted base on the analysis with related properties of microstucture, mechanics, thermodynamics and radiation damage. This project will explore a powder metallurgy process route to prepare uranium based alloys that will lay the experiment and theory foundation for design and preparation of late-model uranium fuel-based alloys.

英文关键词： U-based alloy；nuclear fuel；multipore；radiation stability；phase stability