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实现反应堆宽量程中子通量测量是简化反应堆测量系统、控制保护系统和反应堆结构的一个重要方面。本文描述一种新型宽量程中子监测装置,它应用脉冲测量技术和均方电压测量技术的结合,仅用一个固定位置的裂变电离室,完成十个数量级范围的中子通量测量,而且对γ射线有很好的甄别能力。它给出反应堆对数功率指示和周期指示以及周期和小功率保护信号;它与探测器之间的连接电缆可达50米以上,便于实现远距离测量。文章从理论分析、系统设计和实验结果三方面对测量装置作了描述。
Achieving wide-range neutron flux measurement of reactors is an important aspect of simplifying reactor measurement systems, control protection systems and reactor structures. This article describes a new type of wide-range neutron monitoring device that uses a combination of pulsed and rms voltage measurement to measure neutron flux over a ten-decade range using only one fixed-point fission ionization chamber. Gamma ray has good screening ability. It gives the reactor logarithmic power indication and period indication as well as periodic and low-power protection signals; the connection cable between it and the detector can be up to 50 meters for easy remote measurement. The article describes the measuring device from three aspects: theoretical analysis, system design and experimental results.