温度对自给能中子探测器信号影响模拟研究

摘要

为探讨自给能探测器在使用现场温度改变对探测器灵敏度的影响,研究了自给能中子探测器在不同温度工况下电流信号与中子注量率的关系.中子注量率加权微观截面的计算,用以说明不同温度下探测器特性.结果表明:探测器灵敏度并非一个固定常数,在不同工况下需要进行校正.%In this paper,we study the relationship between the current signal and the neutron flux rate of the self-powered neutron detector at different temperatures. The calculation of the neutron flux weighted microscopic cross section has revealed the non constant behavior of the sensitivity as a function of the temperature. As a consequence,it is not possible to use the sensibility as an absolute constant,but rather it must be calculated for each nuclear reactor and corrected under determined conditions