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核供热反应堆的过剩反应性主要靠十字形控制棒来控制。有不同控制棒史的组件内的燃耗分布不同，相应的组件平均截面也就不同。详细考虑控制棒史的影响是很复杂的，为此提出处理控制棒史的线性插值法。假设组件平均截面仅仅与组件总燃耗和带棒燃耗有关。线性插值法要求作无棒燃耗直接计算、带棒燃耗直接计算及在此基础上进行的两种再启动计算。对供热堆含钆组件做了检验计算。通过与跟踪控制棒史的精确计算方法的比较，表明该方法是一个非常简便而有效的方法。
The excess reactivity of nuclear heating reactors is mainly controlled by cruciform control rods. There are different fuel burn distributions within the components with different control rod history, and the corresponding components have different average cross sections. Considering the influence of the control rod history in detail is very complicated. Therefore, a linear interpolation method is proposed to handle the history of the control rod. It is assumed that the average component cross-section is only related to the total fuel burnup and fuel burn-in of the component. The linear interpolation method requires direct calculation of the rod-less fuel consumption, direct calculation of the fuel consumption with the rod and two restarting calculations based thereon. The heating reactor containing gadolinium components to do the test calculation. The comparison with the exact method of tracking the history of control rods shows that this method is a very simple and effective method.