使用RMC求解C5G7-TD基准题动力学问题

RMC Solutions to Kinetic Cases of C5G7-TD Benchmark

清华大学反应堆工程分析(REAL)实验室研发的核反应堆蒙特卡罗(蒙卡)程序(RMC)具有动力学计算功能,为完善其动力学计算算法、验证动力学计算结果,RMC参加了C5G7-TD瞬态基准题的计算。C5G7-TD基准题目前包含6套共28个子算例,这些算例通过控制棒的移动或者慢化剂密度的升降来引入反应性变化。为了减少蒙卡程序计算中结果的波动,RMC使用了106个粒子,同时采用非均匀时间步长以减少计算资源的消耗。除去少量计算规格不同的问题,RMC与n TRACER的功率变化计算结果吻合良好。

The Reactor Monte Carlo code RMC, developed by REAL group, at Tsinghua University, has a function of kinetic calculation. RMC has participated in C5G7-TD transient benchmark calculation to further optimize its kinetic algorithm, and also to validate its results. The C5G7-TD benchmark consists of 6 sets of cases, 28 subcases in total, where the movement or moderator density variation of the control rods is adopted in these cases to introduce the reactivity change. To decrease the oscillation in Monte Carlo calculation, 1 million particles was used in the calculation, and non-uniform time steps were applied to reduce the calculation cost. Except for those cases with different specifications, the power profiles calculated by RMC are in good agreement with those ofnTRACER.