Calculation of neutron spectra on typical irradiation location of the CFBR-Ⅱ reactor

DU Jinfeng

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Calculation of neutron spectra on typical irradiation location of the CFBR-Ⅱ reactor

更新时间：2021-03-05

- Calculation of neutron spectra on typical irradiation location of the CFBR-Ⅱ reactor
- NUCLEAR TECHNIQUES Vol. 33, Issue 3, (2010)
- 作者机构：
  
  中国工程物理研究院核物理与化学研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC： O571.54
- Published：01 March 2010
- 稿件说明：
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[1]杜金峰.CFBR-Ⅱ堆典型辐照位置的中子能谱计算[J].核技术,2010,33(03):183-186.

DU Jinfeng. Calculation of neutron spectra on typical irradiation location of the CFBR-Ⅱ reactor[J]. Nuclear techniques, 2010, 33(3): 183-186.
[1]杜金峰.CFBR-Ⅱ堆典型辐照位置的中子能谱计算[J].核技术,2010,33(03):183-186. DOI：

DU Jinfeng. Calculation of neutron spectra on typical irradiation location of the CFBR-Ⅱ reactor[J]. Nuclear techniques, 2010, 33(3): 183-186. DOI：

摘要

建立基于MCNP程序的中子能谱及平均中子能量计算方法

模拟计算了CFBR-Ⅱ堆典型辐照位置的中子能谱及平均中子能量随空间位置的变化关系。结果表明

各典型辐照位置的中子能谱集中分布于0.05–3MeV（～90%）;去耦盒与辐照孔道轴线上各点的平均中子能量随距离大致呈S形变化趋势

做辐照效应研究时要考虑能谱分布空间不均匀性的影响;去耦罩45°纬线圈到顶部较大范围内平均中子能量波动较小

是较理想的辐照区域。

Abstract

Neutron energy spectra were simulated by the MCNP code.The neutron energy spectra and corresponding average energy of off-coupling box

irradiation channel and outer surface of the off-coupling cover were calculated.The results indicate that about 90% neutrons are in the energy range of 0.05–3 MeV.The average neutron energy of off-coupling box and irradiation channel present "S" shape along distance

and space asymmetry must be considered.The average neutron energy above off-coupling cover’s 45° woof fluctuates slightly and it is an appropriate irradiation area.

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