压水堆堆内中子探测器响应函数特性研究

中子探测器响应函数是中子探测器周边区域对其读数贡献的分布函数，是将反应堆物理数值模拟计算结果与探测器实际电流相结合的有效途径。本文对中子探测器响应函数的计算公式进行了推导，并采用蒙特卡罗方法计算堆内固定式中子探测器的响应函数。针对影响中子探测器响应函数的相关因素进行了数值分析，分析结果表明，对中子吸收特性影响较大的因素，如硼酸、控制棒、可燃毒物等，对中子探测器响应函数的影响较大，需在实际的反应堆监测中着重考虑，本文中未考虑的因素影响也可采用本文类似的方法进行研究分析。

Characteristic Research of Neutron Detector Response Function in PWR

The neutron detector response function is the effective connection between the numerical simulation results and the detector readings, which shows the contribution for the detector readings from rounding areas. In this paper, the formula of the response function was given and calculated using MCNP code. The interfering factors to the response function were analyzed. The analysis results show that the factors that have great influence on the neutron absorption characteristics, such as boric acid, control rod and burnable poison, have significant effect on the response function of the neutron detector. Other effects not referred in this paper could be analyzed by the same method.