控制棒棒位测量系统中两极板电容传感器设计

摘要

The control rod position measurement plays a vital role on the operation and safety of a reactor .To this end ,a sensor system based on the two-electrode capacitance sensor was used to measure the control rod position in NHR-200 .Additionally ,elec-trode coverage ,stray capacitance and shielding method were analyzed to optimize the two-electrode capacitance sensor .The capacitances obtained by simulations were com-pared with experiment results to verify the measurement accuracy .The results show that the simulation results agree well with the experimental results .It is demonstrated that such a system shows very promising applications for measurements of the control rod position of nuclear reactor .%控制棒棒位测量对于反应堆运行与安全至关重要.针对N H R-200反应堆控制棒棒位测量系统,引入基于电容传感器的控制棒棒位测量方法.设计出一种两极板电容传感器,通过分析极板面积、干扰电容以及屏蔽方式的影响,进行仿真计算与优化.分析结果表明,计算结果与试验结果吻合较好,该传感器能进行控制棒棒位的准确测量,有较好的适应能力和应用前景.