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首页> 外文期刊>Nuclear engineering and technology >A REVIEW OF NEUTRON SCATTERING CORRECTION FOR THE CALIBRATION OF NEUTRON SURVEY METERS USING THE SHADOW CONE METHOD
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A REVIEW OF NEUTRON SCATTERING CORRECTION FOR THE CALIBRATION OF NEUTRON SURVEY METERS USING THE SHADOW CONE METHOD

机译：影锥法校正中子测量参数的中子散射校正研究进展

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摘要

The calibration methods of neutron-measuring devices such as the neutron survey meter have advantages and disadvantages. To compare the calibration factors obtained by the shadow cone method and semi-empirical method, 10 neutron survey meters of five different types were used in this study. This experiment was performed at the Korea Atomic Energy Research Institute (KAERI; Daejeon, South Korea), and the calibration neutron fields were constructed using a (252)Californium (Cf-252) neutron source, which was positioned in the center of the neutron irradiation room. The neutron spectra of the calibration neutron fields were measured by a europium-activated lithium iodide scintillator in combination with KAERI's Bonner sphere system. When the shadow cone method was used, 10 single moderator-based survey meters exhibited a smaller calibration factor by as much as 3.1-9.3% than that of the semi-empirical method. This finding indicates that neutron survey meters underestimated the scattered neutrons and attenuated neutrons (i.e., the total scatter corrections). This underestimation of the calibration factor was attributed to the fact that single moderator-based survey meters have an under-ambient dose equivalent response in the thermal or thermal-dominant neutron field. As a result, when the shadow cone method is used for a single moderator-based survey meter, an additional correction and the International Organization for Standardization standard 8529-2 for room-scattered neutrons should be considered. Copyright (C) 2015, Published by Elsevier Korea LLC on behalf of Korean Nuclear Society.
机译：中子测量仪等中子测量装置的校准方法各有利弊。为了比较通过阴影锥法和半经验法获得的校准因子，本研究使用了五种不同类型的10个中子测量仪。该实验在韩国原子能研究所（KAERI;韩国大田）进行，并且使用位于中子中心的（252）（（Cf-252）中子源构造了校准中子场。辐照室。校准中子场的中子光谱是由a活化的碘化锂闪烁体结合KAERI的Bonner球体系统测量的。当使用阴影锥方法时，与半经验方法相比，基于单主持人的10个测量仪显示的校正系数小3.1-9.3％。这一发现表明中子测量仪低估了散射中子和衰减中子（即总散射校正）。校准因子的这种低估归因于以下事实：基于单主持人的测量仪在热或热占优势的中子场中具有低于环境的剂量当量响应。结果，当将阴影锥方法用于基于单个主持人的测量仪时，应考虑进行其他校正以及针对房间散射中子的国际标准化组织标准8529-2。版权所有（C）2015，由Elsevier Korea LLC代表韩国核协会出版。

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