摘要
在NECP-X程序中有2种处理环形燃料共振计算的方法:一种是传统子群方法;另外一种是基于全局-局部耦合的环形燃料共振计算方法。为系统评估这2种环形燃料共振计算方法的计算精度与效率。首先,通过构建具有代表性的单环燃料栅元和单环燃料组件模型,对2种共振计算方法的精度与计算效率进行了详细的对比分析。进而,将更为先进的基于全局-局部耦合的环形燃料共振计算方法应用于西安脉冲堆的全堆芯3维高保真建模与模拟计算中,以检验其在实际应用场景中的性能。数值计算结果表明,基于全局-局部耦合的环形燃料共振计算方法在精度和效率上全面优于传统子群方法。在全堆芯问题的模拟中,计算得到的特征值、栅元功率分布以及关键安全参数控制棒价值,均与参考解吻合良好。研究表明,基于全局-局部耦合的环形燃料共振计算方法兼具高精度与高效率的优势,是处理环形燃料堆芯共振计算问题的更优方案,为先进反应堆的高保真物理设计与安全分析提供了可靠的计算工具,具有重要的工程应用价值。
There are two different resonance calculation methods which can treat the annular fuel in NECP-X.One is traditional subgroup method(TSG),another is the annular fuel resonance calculation method based on the global-local coupling method(AFRCM).To systematically evaluate the computational accuracy and efficiency of these two annular fuel resonance calculation methods,a detailed comparative analysis is first conducted using representative models of a single-ring fuel cell and a singlering fuel assembly to assess the precision and computational efficiency of both resonance calculation methods.Subsequently,the more advanced AFRCM is applied to the high-fidelity three-dimensional modeling and simulation of the full core of the Xi’an Pulsed Reactor to test its performance in practical application scenarios.Numerical results demonstrate that the AFRCM comprehensively outperforms TSG in both accuracy and efficiency.In the full-core simulation,the calculated eigenvalue,cell power distribution,and the critical safety parameter control rod worth all show good agreement with reference solutions.This study indicates that AFRCM combines the advantages of high accuracy and high efficiency,making it a superior solution for addressing resonance calculation problems in annular fuel cores.It provides a reliable computational tool for the high-fidelity physical design and safety analysis of advanced reactors,holding significant engineering application value.
作者
曹璐
李达
刘宙宇
王立鹏
姜夺玉
胡田亮
曹良志
CAO Lu;LI Da;LIU Zhouyu;WANG Lipeng;JIANG Duoyu;HU Tianliang;CAO Liangzhi(Northwest Institute of Nuclear Technology,Xi’an 710024,China;Nuclear Science and technology school,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《现代应用物理》
2025年第5期102-110,共9页
Modern Applied Physics
基金
国家自然科学基金资助项目(12275219,12205237)。
