General intrusive neutron transport reduced-order model applicable to various deterministic methods

IF 2.3 3区 工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY
Honghang Chi, Yongshi Li, Yuchen Xie, Yahui Wang, Yu Ma
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引用次数: 0

Abstract

The intrusive reduced-order model (IROM) has been developed for detailed neutron transport solving to reduce its expansive computational costs. These techniques take neutron angular fluxes with consistent spatial angular discretization format as snapshots, which limits the generality of existing computing software, especially commercial software. In this work, a general IROM (GIROM) for neutron transport equation (NTE) is proposed. The neutron scalar fluxes from any deterministic method can be directly used as snapshots, which effectively improves the universality of neutron transport IROM. Based on the angular integrated NTE, the corresponding neutron convection term can be calculated by neutron scalar flux. Both the neutron scalar flux and convection term are taken as snapshots to eliminate the dependency on snapshot discretize formats. Numerical results show that the GIROM is compatible with the neutron scalar flux of various deterministic neutron transport solvers, and the computational efficiency can be effectively improved.
一般侵入中子输运降阶模型适用于各种确定性方法
侵入式降阶模型(IROM)用于中子输运的详细求解,以减少其庞大的计算成本。这些技术以具有一致空间角离散格式的中子角通量为快照,限制了现有计算软件,特别是商业软件的通用性。本文提出了中子输运方程的通用IROM (GIROM)。从任何确定性方法得到的中子标量通量都可以直接作为快照,有效地提高了中子输运IROM的通用性。基于角积分NTE,可以用中子标量通量计算相应的中子对流项。中子标量通量和对流项都作为快照,消除了对快照离散格式的依赖。数值结果表明,该方法与各种确定性中子输运求解器的中子标量通量兼容,有效地提高了计算效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Annals of Nuclear Energy
Annals of Nuclear Energy 工程技术-核科学技术
CiteScore
4.30
自引率
21.10%
发文量
632
审稿时长
7.3 months
期刊介绍: Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.
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