铅铋堆零功率实验装置控制棒价值测量及方法优化

零功率实验装置的控制棒价值测量一般采用周期法、置换法或落棒法对刻棒实验进行简单处理。为提高刻棒效率，本文提出了无补偿的多步降棒刻棒方法，采用该方法对我国首个铅铋堆零功率实验装置控制棒价值进行了测量，与补偿刻棒方式及落棒法测量结果进行了对比，并通过理论计算验证了该方法的准确性。结果表明：本文方法有效降低了空间效应对测量值的影响，控制棒价值测量结果准确可靠，可在较短时间内完成较高精度的刻棒实验，适用于需经常更换装料方案的临界实验装置。

Control Rod Worth Measurement and Method Optimization of Lead-bismuth Reactor Zero-power Experimental Device

The control rod worth measurement of the zero-power experimental device is generally performed by the periodic method, the substitution method or the rod drop method. In order to improve the efficiency of measurement, a multi-step rod-insertion method without compensation was proposed. The control rod worth of the first lead-bismuth reactor zero-power experimental device in China was measured by this method, and the results were compared with those obtained by the compensation method and the rod drop method. The accuracy of the method was verified by theoretical calculations. The results indicate that this method effectively reduces the space effect on measured worth, and the measurement results of control rod worth are accurate and reliable. The method can complete the higher precision rod worth measurement in a short time, and is suitable for the critical experimental device that needs to change the charging scheme frequently.