Physical influence of spherical packing rate on the 2 MW AHTR

doi:10.11889/j.0253-3219.2013.hjs.36.060604

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Physical influence of spherical packing rate on the 2 MW AHTR

更新时间：2021-03-05

- Physical influence of spherical packing rate on the 2 MW AHTR
- NUCLEAR TECHNIQUES Vol. 36, Issue 6, Article number: 060604(2013)
- 作者机构：
  
  1. 中国科学院上海应用物理研究所嘉定园区
  2. 兰州大学核科学与技术学院
- 作者简介：
- 基金信息：
  
  中国科学院战略性先导科技专项(XDA02010100)资助
- DOI：10.11889/j.0253-3219.2013.hjs.36.060604
  CLC： TL329
- Published：01 June 2013
- 稿件说明：
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Physical influence of spherical packing rate on the 2 MW AHTR[J]. Nuclear techniques, 2013, 36(6): 060604
DOI：

Physical influence of spherical packing rate on the 2 MW AHTR[J]. Nuclear techniques, 2013, 36(6): 060604 DOI： 10.11889/j.0253-3219.2013.hjs.36.060604.

摘要

在燃料装载量不变情况下

燃料球体积填充率的变化对于先进高温堆的堆芯物理特性有重要影响。我们运用蒙特卡罗程序MCNP 5对Keff、中子能谱及中子注量率的空间分布进行了研究。计算中

燃料球体积填充率取值范围在最密堆积和最稀堆积之间（0.7405–0.5236）。结果表明

燃料球体积填充率的增加可以提高堆芯的Keff

促使中子能谱更加硬化

使中子注量率峰值所在轴向的位置上升。从而为先进高温堆的设计和计算程序的开发提供理论基础。

Abstract

Background: With a constant fuel inventory

the pebble packing rate has an important influence on the physical property of AHTR.Purpose: This paper attempts to study the influence of the pebble packing on a 2 MW AHTR.Methods: We used Monte Carlo Code MCNP 5 to study the related parameters

such as Keff

neutron spectrum and neutron flux distribution.In the analysis

we changed the packing from 0.7405 to 0.5236.Results: Results show that the changes of the pebble packing could increase the Keff of the core

make the neutron spectrum harder

and make the neutron flux peak up in axial position.Conclusions: Results provide rational theory for the design of AHTR and the development of computation code.

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