燃料板失效机理研究与分析  

Tensile failure analysis of U_3Si_2-Al fuel plate

作　　者：陈曦[1] 徐勇[1] 徐曼琼[2] 张之华[3] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084 [2]清华大学航天航空学院,北京100084 [3]中国工程物理研究院核物理化学所,四川绵阳621900

出　　处：《核科学与工程》2007年第3期265-269,共5页Nuclear Science and Engineering

基　　金：国家自然科学基金委员会--中国工程物理研究院联合基金支持项目

摘　　要：U3Si2-Al燃料板是研究堆的新型燃料,其拉伸失效机理是燃料组件设计中需要考虑的重要因素。为此,对大小两种尺寸的燃料板试样,在不同的工艺条件下进行了拉伸试验。基于试验得到的数据结果以及试验过程中对断口拍摄的电镜照片,分析并得到了U3Si2-Al燃料板的一般拉伸失效机理。此外,还对芯体缺陷对拉伸失效的影响进行了讨论,以及拉伸试验中燃料板各部分的力学特性。最后,考虑燃料板在实际工作环境下的拉伸失效可能性,分析了燃料板的实际使用安全性。U3Si2-Al fuel plate is a new kind of fuel in research reactors. The mechanism tensile failure of the fuel plate is a very important element to concern in the design of fuel assemblies. In this paper, the fuel plate samplers in two different sizes have been tested under tensile experiments. Based on the result data and the pictures taken via microscope, the generic mechanism tensile failure of U3Si2-Al fuel plate has been analyzed and concluded. Besides, the effects on the tensile failure from the defects of fuel core have been discussed, as well as the mechanical properties of different parts of the fuel plate. Considering the possibility of the tensile failure of the fuel plate under real operating condition, the safety performance has been analyzed.

关 键 词：U3Si2—Al燃料板 拉伸失效 

分 类 号：TL352[核科学技术—核技术及应用]