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利用游泳池堆热柱孔道,建立了各向同性热中子通量场,供堆内中子测量中作为标准参考之用。文中首先介绍标准中子场的等级划分、用途,然后介绍该装置的设计基点和机械结构,以及中子角分布测量原理。理论分析计算的目的是确定场内中子空间、角和能谱分布,计算公式包括导出二维迁移积分核,高分子氢核和重核碳氧的散射核处理。由理论和实验确定场内中子通量参数。在实际使用中情况良好,符合标准中子场的要求。造价很低,使用方便。
An isotropic thermal neutron flux field has been established by using the thermal stacks of the pool heap for the neutron measurement in the heap as a standard reference. In this paper, the classification and usage of standard neutron field are introduced first, and then the design basis and mechanical structure of the device are introduced, and the principle of neutron angular distribution measurement is introduced. The purpose of theoretical analysis and calculation is to determine the field neutron space, angle and energy spectrum distribution. The calculation formula includes the derivation of two-dimensional migrating integral nuclei, polymer nuclei, and heavy nuclear carbon-oxygen scattering nuclei. The field neutron flux parameters are determined theoretically and experimentally. In actual use in good condition, in line with the requirements of the standard neutron field. Low cost, easy to use.