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一些辐照研究要求随时知道快中子瞬时通量和积分通量,以确定它与辐照效应的关系或决定对辐照装置应进行的调整。目前各国快中子监测器都处在研究阶段。本文根据高通量工程试验堆反射层的物理特点,在零功率状态下测量快热比,用随装置安装的铑自给能探测器监测快通量,并与同时安装的纯铁活化箔测量结果进行比较,两种方法在4%以内符合,证实了快热比不变的假定和使用该方法的可靠性。本文还对箔活化法数据处理的一些问题进行了讨论。
Some irradiation studies require that the instantaneous neutron flux and the integral flux be known at any time to determine its relationship to the effects of the irradiation or to determine the adjustments that should be made to the irradiation device. At present, fast neutron detectors in all countries are in the research stage. In this paper, according to the physical characteristics of the high-flux test reactor reflector layer, the fast heat ratio is measured under zero-power condition. The rhodium self-powered detector installed with the device is used to monitor the fast throughput and is compared with the measurement result of pure iron activated foil For comparison, the two methods fit within 4%, confirming the assumption of fast calorie ratio and the reliability of using this method. The paper also discusses some issues about the data processing of foil activation method.