固定棒位法测量控制棒总价值

控制棒价值测量的准确度与效率对核电厂的安全性与经济性具有重要影响。在动态刻棒等反应性测量工作中，本底与中子源对探测器有显著影响，致使根据实测电流计算得到的反应性显著偏离真实值。基于点堆逆动态方程，通过对本底与中子源影响的分析，利用固定棒位状态下的测量数据计算反应性并得到控制棒总价值，给出了一种不受本底与中子源影响的简便的控制棒总价值测量计算方法，并在零功率实验装置上进行验证。结果表明，该方法可有效避免本底和中子源组件对反应性探测的影响，并简化了离线理论计算，其与周期法计算结果的相对偏差在1%以内。

Measurement of Total Worth of Control Rod by Static-rod-position Method

The precision and efficiency of the measurement of control rod worth are of great importance to the safety and economy of nuclear power plants.During reactivity measurements,such as the dynamic control rod worth measurement,the background and neutron source have significant impact on the detectors,resulting in a significant error of the measured reactivity.Based on the point-reactor inverse kinetics equation,the background and neutron source were analyzed,and the reactivity and control rod worth were obtained by use of the data measured with the control rods being at static positions.Accordingly,a practical method was developed for the measurement of the total worth of control rods,which is free from the impact of background and neutron source,and tested on a zero power facility.It is shown by the test results that the method effectively eliminates the impact of background and neutron source and simplifies the offline calculation.The relative difference between the result of this method and that of the periodic method is below 1％.