~3He正比计数管对中子具有很高的探测效率和较宽的能量响应范围;同时,~3He正比计数管中的介质气体~3He是惰性气体,探测器有着很好的稳定性,适合在较高温度环境下使用。基于以上的优点,反应堆初次装料中子监测系统的探测器选择~3He正比计数管也是最为合适的。反应堆初次装料中子监测系统主要由探头部分和电子学系统两部分组成。其中,探头部分采 ~ 3He positive counter tube neutron detection efficiency and a wide range of energy response; the same time, ~ 3He proportional counter tube gas ~ 3He is an inert gas, the detector has a very good stability, suitable for Used in higher temperature environment. Based on the above advantages, it is also most suitable for the detector to choose the ~ 3He proportional counter tube for the first reactor neutron monitoring system. Reactor primary charge neutron monitoring system mainly consists of probe part and electronic system. Among them, the probe part of the mining