金属燃料辐照模型关于孔隙率的改进及快堆金属燃料性能分析程序开发

Improvement of Metal Fuel Irradiation Model on Porosity and Development of Metal Fuel Performance Analysis Code for Fast Neutron Reactor

随着钠冷快堆及铅冷快堆的发展,金属燃料的应用前景初步显现,开发适用于钠冷快堆金属燃料的性能分析程序对快堆金属燃料的发展和应用具有重要意义。本工作在调研总结了燃料芯体的孔隙率对导热系数、力学参数的影响后,提出了新的金属燃料芯体导热系数和力学参数模型。此外,在参考金属燃料相关文献中金属燃料的其他辐照行为模型后,本工作改进了传热模型及力学模型,利用FORTRAN-90开发了适用于钠冷快堆棒状金属燃料的燃料性能分析程序,该程序可用于预测典型的金属燃料辐照行为。

With the development of sodium-cooled fast reactors and lead-cooled fast reactors, the application prospect of metal fuel has initially appeared. The development of metal fuel performance analysis code suitable for sodium-cooled fast reactors is of great significance to the development and application of metal fuels. After investigating and summarizing the influence of the porosity of the pellet on the thermal conductivity and mechanical properties, a new model of the thermal conductivity and mechanical properties of the pellet is proposed. In addition, the heat transfer model and mechanical model were improved after referring to other radiation behavior models of metal fuel in related literatures, a fuel performance analysis code suitable for sodium-cooled fast reactor rod metal fuels was developed using FORTRAN-90. This code can be used to predict typical irradiation behaviors of metal fuels.