Calculation of the Integral Kinetic Model Transient Parameters by the Monte Carlo Method for Space-Dependent Kinetic Analysis
Calculation of the Integral Kinetic Model Transient Parameters by the Monte Carlo Method for Space-Dependent Kinetic Analysis
复制标题
通过蒙特卡罗方法计算积分运动模型瞬态参数以进行空间相关的运动分析
DOI：
10.13182/nse08-91
复制
发表时间：
2010
影响因子：
1.2
通讯作者：
T. Obara
中科院分区：
文献类型：
--
作者：
H. Takezawa;T. Obara
摘要积分动力学模型适用于任何几何形状的弱耦合体系，适用于空间相关动力学分析。瞬态参数描述的时间分布的中子输运系统中的区域之间的是必不可少的，这个模型。本文提出了一个基于非模拟蒙特卡罗中子输运模拟技术的参数计算公式。对连续能量蒙特卡罗程序MVP2.0进行了修改，并利用静态耦合反应器理论对修改进行了验证。在一个简单的快速热耦合反应器中计算了参数。结果表明，在快区和热区之间的裂变开始时间的差异，这可能会导致在两个区域之间的瞬态行为的时间滞后。结果还揭示了在每个区域触发裂变的中子能量群的时间分布。基于积分动力学模型的空间相关动力学分析程序正在开发中，这些参数可用于积分动力学模型，对弱耦合体系进行空间相关动力学分析。
Abstract The integral kinetic model is applicable to space-dependent kinetic analysis for any weakly coupled system because of its applicability to any geometry. Transient parameters that describe the time distribution of neutron transport between regions in a system are essential for this model. This paper presents a formula for calculating the parameters based on the nonanalog Monte Carlo neutron transport simulation technique. A continuous-energy Monte Carlo code MVP2.0 was modified to calculate the parameters, and the modification was verified using the static coupled reactor theory. The parameters were calculated in a simple fast-thermal coupled reactor. The results showed a difference in fission starting times between a fast region and a thermal region, which can cause a time lag in the transient behavior between the two regions. The results also revealed the time distribution of neutron energy groups that trigger fissions in each region. A space-dependent kinetic analysis code based on the integral kinetic model is under development, and these parameters can be used in the integral kinetic model to perform space-dependent kinetic analysis for weakly coupled systems.