{"title":"Preliminary criticality analysis of a partially damaged reactor core under different scenarios","authors":"Hoang Hai Nguyen","doi":"10.1016/j.anucene.2025.111361","DOIUrl":null,"url":null,"abstract":"<div><div>This study examined the criticality characteristics of a partially damaged reactor model, in which fuels located at the core center melt into fuel debris of varying shapes, while fuels situated at the core edge remain intact. The investigation was conducted using the Serpent code with the JENDL-5 library. The results indicate that when the volume of fuel debris is constant, the shape of the fuel debris does not cause significant alterations in the variation of the k<sub>eff</sub> of the system. In contrast, for the scenario of the variable fuel-debris volume, the k<sub>eff</sub> variation law can be divided into two groups for the reference case with a system temperature of 300 K and no boron in the water. The first group comprises fuel debris with cuboid and cylindrical shapes, while the second group includes spherical, conical, and truncated conical shapes.</div></div>","PeriodicalId":8006,"journal":{"name":"Annals of Nuclear Energy","volume":"218 ","pages":"Article 111361"},"PeriodicalIF":2.3000,"publicationDate":"2025-03-24","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/S0306454925001781","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
This study examined the criticality characteristics of a partially damaged reactor model, in which fuels located at the core center melt into fuel debris of varying shapes, while fuels situated at the core edge remain intact. The investigation was conducted using the Serpent code with the JENDL-5 library. The results indicate that when the volume of fuel debris is constant, the shape of the fuel debris does not cause significant alterations in the variation of the keff of the system. In contrast, for the scenario of the variable fuel-debris volume, the keff variation law can be divided into two groups for the reference case with a system temperature of 300 K and no boron in the water. The first group comprises fuel debris with cuboid and cylindrical shapes, while the second group includes spherical, conical, and truncated conical shapes.
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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