U_3Si_2-Al燃料肿胀特性研究

Research in U_3Si_2-Al Fuel Swelling Characteristics

基于扩散动力学建立了辐照条件下U_3Si_2-Al反应层生长模型和燃料肿胀模型,并结合中国工程试验堆(CENTER)燃料辐照试验数据,验证了上述模型的有效性和适用性。结果表明,反应层生长模型与现有辐照后测量数据的符合程度较好,可用于U_3Si_2-Al弥散燃料肿胀特性计算;燃料肿胀模型对于预测CENTER燃料元件的肿胀率具有保守性。

Based on diffusion dynamics, U_3Si_2-Al interdiffusion layer growth model and fuel swelling model under irradiation condition were established. With fuel irradiation test data for China ENgineering TEst Reactor(CENTER), the validity and applicability of the models all above were demonstrated. The results showed that the interdiffusion layer growth model agrees well with the post-irradiation measured data now available, and could be used in the calculation of U_3Si_2-Al fuel swelling characteristics; the fuel swelling model is conservative for the swelling prediction for CENTER fuel element.