多物理一体化临界安全程序INSL-UniFoam的研究  

Development of INSL-UniFoam:a multi-physics integrated criticality safety analysis program

作　　者：叶思远 李泓龙 李玥航 柴翔[1] 刘晓晶[1] 何东豪 Ye Siyuan;Li Honglong;Li Yuehang;Chai Xiang;Liu Xiaojing;He Donghao(School of Nuclear Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学核科学与工程学院,上海200240

出　　处：《强激光与粒子束》2025年第2期140-148,共9页High Power Laser and Particle Beams

摘　　要：快中子脉冲堆(FBR)是临界安全分析研究的重要对象。它们具有几何形状不规则、强瞬态过程、多物理紧密耦合以及复杂的反馈特性等特点。为了精确模拟并分析快中子脉冲堆在瞬发超临界过程中各物理场的变化情况,开发了一门基于OpenFOAM的多物理核临界安全分析程序,名为INSL-UniFoam。该程序集成了离散纵坐标中子输运求解器、传热和应力-应变求解器,能够模拟快中子脉冲堆的瞬态超临界脉冲过程。程序在Godiva-I基准题中进行了验证,对稳态条件下的多个物理参数进行了敏感性分析。同时,程序还对Godiva-I的瞬态脉冲场景进行了计算并与实验结果进行了比对。结果表明,程序在中子学计算方面具有较高的精度,能精确反映脉冲堆的功率、中子通量的分布情况。同时瞬态耦合计算所得的脉冲功率曲线、峰值功率、裂变产额等方面与参考解符合良好,能够较好地反映脉冲过程并且能够完整地输出脉冲过程的功率、温度、应力应变在内多个物理场的分布情况并与实验结果较好地匹配。Fast Burst Reactors(FBRs)are important subjects for criticality safety analysis research.They are characterized by irregular geometry,strong transient processes,tight multi-physics coupling,and complex feedback characteristics.This paper introduces an OpenFOAM based multi-physics nuclear criticality safety analysis code named INSL-UniFoam.It integrates discrete ordinate neutron transport solver,heat transfer and stress-strain solvers to detailly model the prompt super-critical burst pulse of FBRs.The UniFoam is first verified in the Godiva-I benchmark under both the steady-state condition and several transient scenarios.The results demonstrate that the program aligns well with the reference solution in terms of Keff calculation,peak power,and fission yield.Furthermore,it is capable of comprehensively outputting the distributions of power,temperature,and stress-strain throughout the pulse process.

关 键 词：临界安全分析 离散纵标法 中子输运 快中子脉冲堆 多物理耦合计算 

分 类 号：TL329.2[核科学技术—核技术及应用]