| 启明星1#实验装置ks、keff和φ*的模拟计算 |
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| 引用本文： | 郭广水,于涛,夏普.启明星1#实验装置ks、keff和φ*的模拟计算[J].原子能科学技术,2008,42(2):185-188. |
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| 作者姓名： | 郭广水 于涛 夏普 |
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| 作者单位： | 1. ;南华大学 ;核科学与技术学院，湖南 ;衡阳 ;421001；2.中国原子能科学研究院，北京 ;102413 |
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| 基金项目： | 国家自然科学基金资助项目(10575139) |
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| 摘 要： | 用MCNP程序对启明星1#实验装置（Venus1#）的ks、keff和φ*进行模拟计算。在装置的源区、快区、反射层、屏蔽层已定条件下，逐层增加热区燃料元件，每增加1层，对ks、keff和φ*进行1次计算，共增加了13层，最终得到keff为0.96246，满足了Venus1#的设计要求。元件层数增加，φ*先增后降，当增至12层时，φ*又明显增大。外源位置和能量对φ*有影响，外源在轴向离中心越近、能量越高，φ*越大。
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| 关 键 词： | 启明星1#实验装置 MCNP程序 有源次临界中子有效增殖因子 有效增殖系数 外源中子平均价值 |
| 文章编号： | 1000-6931(2008)02-0185-04 |
| 收稿时间： | 2007-09-26 |
| 修稿时间： | 2007年9月26日 |
Simulating Calculation of
Parameters ks,keff and |
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| GUO Guang-shui.Simulating Calculation of
Parameters ks,keff and[J].Atomic Energy Science and Technology,2008,42(2):185-188. |
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| Authors: | GUO Guang-shui |
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| Affiliation: | 1. School of Nuclear Science and Technology， Nanhua University， Hengyang 421001， China； ;2. China Institute of Atomic Energy， P.O.Box 275-75， Beijing 102413， China ; |
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| Abstract: | The source sub-critical effective multiplication factor (ks), effective multiplication factor (keff) and external source neutron worth (φ*) of Venus 1# were calculated by MCNP code. When the neutron source zone, the fast neutron spectrum zone, the reflecting zone and the shielding zone is kept constant and the fuel rods in the thermal neutron spectrum zone are added layer by layer, ks, keff and φ* are calculated, respectively. The keff is 0.962 46 at 13 added layers, and it meets the design request of Venus 1#. When the fuel rods are added layer by layer, φis increased and then decreased. The φ* is increased obviously at the 12th layer of fuel rods. In addition, the research results show that the closer the source position to the center of the assembly axially and the higher the energy of the source neutron, the greater φ* would be. |
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| Keywords: | Venus 1# MCNP code ks keff φ* |
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