研究堆用U3Si2-Al燃料板的热稳定性试验

U3Si2-Al板状燃料组件是一种推广应用的新型燃料元件,在国内首次应用。燃料组件的各项性能,特别是热稳定性必须通过实验验证。通过对铀密度为3.02 g/cm3的U3Si2-Al燃料板的热稳定性试验,得到:热稳定性试验会使燃料板的体积略有增大;120℃及250℃的热循环下,燃料板无明显变形,表面无变化,400℃的热循环下,燃料板略有弯曲,个别芯体裸露的燃料板表面有起泡现象;循环温度越高,芯体中U3Si2颗粒开裂越严重等实验结论,为该燃料组件的结构设计、安全分析、加工工艺提供了关键参数,并为该组件的堆内运行提供了借鉴。

Thermal stability study of U3Si2-Al fuel plates for research reactor

U3Si2-Al fuel plates are recommendatory new fuels,which is the first time to use in China.Its properties,especially thermal stability of fuels,have to be tested by experiments.Thickness,volume,and metallographic phase measurements of U3Si2-Al fuel plates with uranium density 3.02 g/cm3 have been carried out at different temperatures during rated operation cycle.These test data will give important parameters for structure design,safe analysis and manufacture techniques of fuels,and supply references on the running of the fuel in reactor.