Investigation of the Influence of the Fuel Element Design Parameter on the VVER-1000 Reactor Axial Power Peaking Factor

Q4 Energy

Izvestiya Wysshikh Uchebnykh Zawedeniy, Yadernaya Energetika Pub Date : 2023-03-01 DOI:10.26583/npe.2023.2.03

Vladimir A. Gorbunov, S.S. Teplyakova, N. A. Lonshakov, Sergey G. Andrianov, P.A. Mineev, Yury Kazansky

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引用次数: 0

Abstract

The paper presents the results of a numerical study into the efficiency of the fuel element operation in the pressurized water reactor (VVER) core filled with uranium dioxide (UO 2 ) pellets. The investigation results were obtained from a three-dimensional simulation of the fuel element power density. The dependencies of the fuel and fuel cladding temperatures on specific power per cubic meter of fuel are compared. Uranium metal and uranium dioxide have been studied as fuel. Engineering constraints on the safe operation of fuel assemblies have been selected as the determining parameters. The paper analyzes the extent of the radiation heat transfer effects on the fuel element specific power. Equations have been obtained that reflect the dependencies of specific power per cubic meter of fuel on the size of the fuel pellet hole diameter in the maximum heat flux conditions. The COMSOL Multiphysics code, a numerical thermo - physical simulation package, was used for the study. Calculations show that an additional uranium-235 enrichment with an increase in the fuel pellet hole diameter at a fixed fuel thermal power leads to a reduced reactor axial temperature field peaking factor.

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燃料元件设计参数对VVER-1000反应堆轴向功率峰值因数影响的研究

本文介绍了二氧化铀(UO 2)填充压水堆堆芯燃料元件运行效率的数值研究结果。研究结果是通过对燃料元件功率密度的三维模拟得到的。比较了燃料和燃料包壳温度对每立方米燃料比功率的依赖关系。已经研究过金属铀和二氧化铀作为燃料。选择燃料组件安全运行的工程约束条件作为决定参数。分析了辐射换热对燃料元件比功率的影响程度。在最大热流条件下，得到了反映每立方米燃料比功率与燃料球团孔径大小的关系的方程。本研究使用COMSOL Multiphysics代码，这是一个数值热物理模拟软件包。计算表明，在一定的燃料热功率下，随着燃料球团孔直径的增加，铀235的额外富集会导致反应堆轴向温度场峰值因子的降低。

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

Izvestiya Wysshikh Uchebnykh Zawedeniy, Yadernaya Energetika Energy-Nuclear Energy and Engineering

CiteScore

0.40

自引率

0.00%

发文量

期刊介绍： The scientific journal Izvestiya Wysshikh Uchebnykh Zawedeniy, Yadernaya Energetika is included in the Scopus database. Publisher country is RU. The main subject areas of published articles are Nuclear Energy and Engineering, Физика, Приборостроение, метрология и информационно-измерительные приборы и системы, Информатика, вычислительная техника и управление, Энергетика. Before sending a scientific article, we recommend you to read the section For authors. This will allow you to prepare an article better for publication, to make it more interesting for the readers and useful for the scientific community. By following these steps, you will greatly increase the likelihood of your scientific article publishing in journals included in international citation systems (e.g., Scopus). Then you may choose a different journal, select the journal included to list of SAC Russia journal list, or send your scientific work for review and publication.