FCM燃料热学性能分析

FCM Fuel Thermal Performance Analysis

研究了利用有限元分析软件ABAQUS对全陶瓷微封装燃料(FCM燃料)芯块进行热学性能分析的方法,并对FCM燃料芯块和传统UO_2芯块的热学性能进行了对比分析。研究结果表明:FCM芯块温度分布趋势与UO_2芯块相同,但具有较大不均匀性;典型压水堆运行工况下,FCM燃料芯块的燃料温度远小于UO_2芯块的温度;在相同线功率密度下,FCM芯块温度对燃耗变化不敏感;在相同燃耗下,FCM芯块随线功率密度增加温度升高的速率相比UO_2芯块更慢。

In this paper, the method to analyze the FCM fuel thermal performance using finite element software ABAQUS is studied, and the comparative analysis of thermal performance of FCM pellet and UO2 pellet is carried out. The results show that the temperature distribution trend of FCM pellet is similar with that of UO2 pellet but with a strong non-uniformity. The temperature of FCM pellet is much lower than that of UO2 pellet under typical PWR operating environment. The temperature of FCM is not sensitive to the burnup change at the same linear power density and the temperature increase rate of FCM pellet is much lower than that of UO2 pellet along with the linear power density increment at the same fuel burnup.