{"title":"A multi-scale coupling algorithm for burnup calculation of dispersed particulate poison","authors":"Junxian Li , Xuezhong Li , Jiejin Cai","doi":"10.1016/j.anucene.2024.110980","DOIUrl":null,"url":null,"abstract":"<div><div>The spatial effects of dispersed particulate medium have a significant impact on the neutron characteristics of poison, leading to pronounced microscopic stratification phenomenon during burnup. A new multi-scale coupling burnup calculation algorithm for the dispersed particulate poison has been proposed. The microscopic exact particle model is coupled with the macroscopic homogeneous lattice element model. This coupling simplifies the direct refined solution process of dispersed particulate medium into a fast-solving problem for a simple and conventional medium. The computation results show that the multi-scale coupling algorithm has an overall error of effective multiplication factor around 200 pcm. The error level of thermal neutron flux and poison number density by using new algorithm are 1.2% and 1.41%, respectively. The overall time for calculation of each burnup step is twice as efficient as the direct-refined method.</div></div>","PeriodicalId":8006,"journal":{"name":"Annals of Nuclear Energy","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-10-15","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/S0306454924006431","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 spatial effects of dispersed particulate medium have a significant impact on the neutron characteristics of poison, leading to pronounced microscopic stratification phenomenon during burnup. A new multi-scale coupling burnup calculation algorithm for the dispersed particulate poison has been proposed. The microscopic exact particle model is coupled with the macroscopic homogeneous lattice element model. This coupling simplifies the direct refined solution process of dispersed particulate medium into a fast-solving problem for a simple and conventional medium. The computation results show that the multi-scale coupling algorithm has an overall error of effective multiplication factor around 200 pcm. The error level of thermal neutron flux and poison number density by using new algorithm are 1.2% and 1.41%, respectively. The overall time for calculation of each burnup step is twice as efficient as the direct-refined method.
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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