Honghang Chi, Yongshi Li, Yuchen Xie, Yahui Wang, Yu Ma
{"title":"General intrusive neutron transport reduced-order model applicable to various deterministic methods","authors":"Honghang Chi, Yongshi Li, Yuchen Xie, Yahui Wang, Yu Ma","doi":"10.1016/j.anucene.2025.111854","DOIUrl":null,"url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":8006,"journal":{"name":"Annals of Nuclear Energy","volume":"226 ","pages":"Article 111854"},"PeriodicalIF":2.3000,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annals of Nuclear Energy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0306454925006711","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"NUCLEAR SCIENCE & TECHNOLOGY","Score":null,"Total":0}
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.
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.