AP1000核反应堆控制棒价值特性的MC模拟

针对当前AP000堆芯采用的两类控制棒束，基于MCNP5程序建立堆芯仿真计算模型，分析了含不同硼浓度对堆芯kef与硼微分价值的影响，同时对AP1000棒组价值进行模拟计算，对比分析了黑棒与灰棒插入堆芯对kef的影响。结果表明：基于MC N P5程序建立的模型是正确的，硼微分价值（绝对值）随硼浓度增加呈现下降趋势，其值在－9．16～－13．60范围内变化，符合反应性设计要求，有效增殖系数kef随控制棒插入呈现非线性变化，得到了控制棒的价值变化曲线与拟合关系式，为控制棒在反应堆内紧急控制与功率调节提供参考。

Analysis of Control Rod Worth Features of MC Simulation in AP1000 Reactor

In view of current use of two kinds of control rods in AP1000 reactor,the simulation calculation model was set up based on MCNP5 code,kef and differential value of boron with several different boron concentration were analyzed in the reactor,and simulation of group value rods of AP1000 were calculated at the same time,and the contrast analysis of kef effects was accomplished when black and grey rod insert-ed into the core.Results show that:the model based on MCNP5 code is correct,and the differential value of boron (absolute value)present a downward trend with the increase of boron concentration,and its value changed between 9.16 and 13.60,which is conforms to the requirements of reactive design,and the effec-tive multiplication factor kef present nonlinear variation with rod inserted into the core,and it gets the curves of control rod worth and fitting relation,which provides the reference for emergency control and power regulation with control rod in the reactor.