球床高温堆平衡态燃耗计算程序的开发

Development of Burnup Calculation Code for Pebble-bed High Temperature Reactor at Equilibrium State

摘要: 基于MCNP5和ORIGEN2耦合方法，开发了平衡态下球床高温堆的燃耗计算程序PBRE，用于堆的性能价值分析。为节省蒙特卡罗计算时间，对迭代收敛的方法进行优化，使之可在10个迭代步内收敛。使用PBRE对清华大学HTR-10进行建模计算，得到的平均卸料燃耗深度与文献报道值一致，表明PBRE程序适用于球床堆平衡态的燃耗分析。

Abstract: The burnup calculation code PBRE coupling MCNP5 and ORIGEN2 was developed for pebble-bed high temperature reactor at equilibrium state, and it can be used to analyze the neutronic performance of equilibrium core. The iteration method was optimized in order to save Monte Carlo calculation time, and the convergence can be reached in 10 iterative steps. The average discharged burnup for HTR-10 is consistent with literature, and it indicates that the PBRE is suitable to analyze the burnup for pebble bed reactor at equilibrium state.