球床高温气冷堆卸料燃耗阈值对平均卸料燃耗的影响

基于蒙特卡罗方法开发了球床高温气冷堆燃料球运行历史模拟程序，分析不同卸料燃耗阈值对平均卸料燃耗、卸料燃耗分布的影响，并分析了不同球流速度模型下的差别。结果表明，卸料燃耗阈值对于平均卸料燃耗、卸料燃耗分布很大程度上受到各流道燃料增量的特性的影响。

Effect of Discharging Burnup Threshold on Average Discharging Burnup in Pebble Bed HTR

The code to simulate the operation history of fuel pebbles in the pebble bed high-temperature gas-cooled reactor (HTR) was developed based on Monte Carlo method. The effects of discharging burnup threshold on the average value and distribution of discharging burnup were evaluated, and the results for different core models with different pebble flow speeds were compared. The results show that the effect of discharging burnup threshold on the average value and distribution of discharging burnup is largely influenced by the span of burnup increment in each flow channel.