{"title":"Load-Follow Operation in LEU+ loaded very-low soluble boron APR1400","authors":"Husam Khalefih, Yonghee Kim","doi":"10.1016/j.pnucene.2024.105415","DOIUrl":null,"url":null,"abstract":"<div><p>This study explores the effectiveness of the mode-K+ strategy in managing a Very-Low Soluble Boron (VLSB) APR1400 core, loaded with LEU + fuel, and utilizing the Centrally-Shielded Burnable Absorber (CSBA) and erbia for excess reactivity control. Initially, a 24-month two-batch fuel management scheme was developed, targeting an equilibrium cycle Burnup (BU) of 26 GWD/MTU. The scheme required a maximum of ∼550 ppm Critical Boron Concentration (CBC) in the early cycle BU. Analysis of radial and axial power profiles revealed that the power peaking factors remained within acceptable limits, with values not exceeding 1.4 and 1.6 throughout the cycle, respectively. Subsequently, various Daily Load-Follow Operation (DLFO) scenarios were examined at different BU levels. These investigations demonstrated a consistent alignment between the demanded power and the reactor's power output. Furthermore, critical safety parameters, including the Axial Shape Index (ASI) and inlet coolant temperature, consistently remained within prescribed design specifications. The study's findings underscore the feasibility and reliability of implementing a VLSB APR1400 core with LEU + fuel, using mode-K+ and advanced fuel management strategies for effective power generation and safety compliance. To perform the analysis, an in-house diffusion code KANT was utilized, KANT is based on NEM-CMFD accelerated simulation tool, while the cross-section was generated via Serpent 2.2.0 assessed with ENDF VII.B data library.</p></div>","PeriodicalId":20617,"journal":{"name":"Progress in Nuclear Energy","volume":"177 ","pages":"Article 105415"},"PeriodicalIF":3.3000,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Progress in Nuclear Energy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0149197024003652","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 explores the effectiveness of the mode-K+ strategy in managing a Very-Low Soluble Boron (VLSB) APR1400 core, loaded with LEU + fuel, and utilizing the Centrally-Shielded Burnable Absorber (CSBA) and erbia for excess reactivity control. Initially, a 24-month two-batch fuel management scheme was developed, targeting an equilibrium cycle Burnup (BU) of 26 GWD/MTU. The scheme required a maximum of ∼550 ppm Critical Boron Concentration (CBC) in the early cycle BU. Analysis of radial and axial power profiles revealed that the power peaking factors remained within acceptable limits, with values not exceeding 1.4 and 1.6 throughout the cycle, respectively. Subsequently, various Daily Load-Follow Operation (DLFO) scenarios were examined at different BU levels. These investigations demonstrated a consistent alignment between the demanded power and the reactor's power output. Furthermore, critical safety parameters, including the Axial Shape Index (ASI) and inlet coolant temperature, consistently remained within prescribed design specifications. The study's findings underscore the feasibility and reliability of implementing a VLSB APR1400 core with LEU + fuel, using mode-K+ and advanced fuel management strategies for effective power generation and safety compliance. To perform the analysis, an in-house diffusion code KANT was utilized, KANT is based on NEM-CMFD accelerated simulation tool, while the cross-section was generated via Serpent 2.2.0 assessed with ENDF VII.B data library.
期刊介绍：
Progress in Nuclear Energy is an international review journal covering all aspects of nuclear science and engineering. In keeping with the maturity of nuclear power, articles on safety, siting and environmental problems are encouraged, as are those associated with economics and fuel management. However, basic physics and engineering will remain an important aspect of the editorial policy. Articles published are either of a review nature or present new material in more depth. They are aimed at researchers and technically-oriented managers working in the nuclear energy field.
Please note the following:
1) PNE seeks high quality research papers which are medium to long in length. Short research papers should be submitted to the journal Annals in Nuclear Energy.
2) PNE reserves the right to reject papers which are based solely on routine application of computer codes used to produce reactor designs or explain existing reactor phenomena. Such papers, although worthy, are best left as laboratory reports whereas Progress in Nuclear Energy seeks papers of originality, which are archival in nature, in the fields of mathematical and experimental nuclear technology, including fission, fusion (blanket physics, radiation damage), safety, materials aspects, economics, etc.
3) Review papers, which may occasionally be invited, are particularly sought by the journal in these fields.
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