负荷跟踪过程中优化移动棒栅以实现三维功率分布的控制

核反应堆的负荷跟踪问题通常采用一维中子通量模型来处理，但采用一维模型并不总是适合的，尤其是当反应堆的功率控制过程完全采用中子通量的强吸收体－－控制棒控制时。本文提出采用三维中子通量模型，并且采用谐波综合法与节块法结合用于负荷跟踪的优化计算，以实现有效的三维功率分布控制。为此，控制棒采用分组调节的策略。从对200MW核供热堆的计算结果可以看出：由于能够充分利用三维功率控制的优势，这种棒动策略可以较其他动棒方式有较好的跟踪效果，例如使功率峰因子下降约4％。

Optimizing Rod Movements Method to Realize 3-D Power Distribution Control for Load Follow

The load-following problem in nuclear reactor is traditionally dealt with 1-D neutron flux model,but it is not always appropriate,especially when control rods,which are strong neutron absorption bodies,maintain the power changing procedure by itself.In this paper,a 3-D neutron flux model is used to perform a 3-D power distribution control over the whole load-following procedure.To make it effective and improve the calculating performance,the Harmonic synthesis method and Nodal method are combined in the load-following calculation for optimization.For this purpose,the control rods are managed according to the grouping-control strategy.From the calculation results on the 200MW Heating Reactor,it can be seen that this rod-managing-strategy produces a better control result than other strategies,since in makes full use of the advantages of the 3-D power distribution control.For example,it causes the power peaking-factor to lessen about 4％ .