使用直接测量和蒙特卡罗模拟相结合的方法对一回路管道(含水)内放射性测量的效率进行了刻度。在探测器前不放置吸收片,及分别放置1mm、3mm、5mm、10mm铅板的5种条件进行了测量及模拟,效率曲线的能区范围从100keV到5MeV,能够满足现场测量的需要。另外,考虑到实验室管道条件(含保温材料)与现场条件可能存在差异,对效率曲线的刻度也可能有影响。为 The combination of direct and Monte Carlo simulations was used to calibrate the efficiency of radioactivity measurements in the primary circuit (hydrous). The measurement and simulation were carried out under the condition that no absorption sheet was placed in front of the detector and five conditions of 1mm, 3mm, 5mm and 10mm lead plates were respectively set. The energy range of the efficiency curve ranged from 100keV to 5MeV, which could meet the needs of field measurement. In addition, considering the differences in laboratory pipeline conditions (including insulation materials) and field conditions, the calibration of the efficiency curve may also be affected. for