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Расчетный анализ температурного состояния твэлов в бассейне выдержки

выпускная квалификационная работа бакалавра

Расчетный анализ температурного состояния твэлов в бассейне выдержки

Abstract

Данная работа посвящена моделированию полей скорости и температуры в элементе хранилища ОЯТ при запроектной аварии, связанной с внезапным полным осушением бассейна выдержки ОЯТ. Задачи, которые решались в ходе исследования: 1. Разработка и отладка в пакете прикладных программ ANSYS Fluent трехмерной расчетной модели для исследования теплового состояния одного пенала с ОТВС, с учетом теплообмена конвекцией внутри пенала и неравномерного распределения остаточного тепловыделения ОЯТ по высоте. 2. Исследование стационарного теплового состояния ОТСВ в обезвоженном пенале для различных значений остаточного тепловыделения ОЯТ и различных граничных условий. 3. Анализ полученных результатов и их сравнение с данными из работ, выполненных другими авторами. В работе в пакете прикладных программ ANSYS Fluent версии 23.R2 построена трехмерная численная модель пенала с ОТВС реактора БН-800. Расчеты стационарных полей температур выполнены путем численного решения уравнений сохранения с учетом естественной конвекции и теплового излучения для различных значений остаточного тепловыделения ОЯТ. Сделан вывод о влиянии естественной конвекции воздуха и лучистого тепло-обмена на тепловое состояние ОЯТ в условиях запроектной аварии.

This work is devoted to modeling the velocity and temperature fields in the SNF storage element in case of an out-of-design accident associated with sudden complete drainage of the SNF holding basin. Tasks that were solved during the research: 1. Development and debugging of a three-dimensional computational model in the ANSYS Fluent software package for studying the thermal state of one case with SNFA, taking into account heat exchange by convection inside the pencil case and the uneven distribution of residual SNF heat release in height. 2. Investigation of the stationary thermal state of SNFA in a dehydrated case for various values of residual SNF heat release and various boundary conditions. 3. Analysis of the results obtained and their comparison with data from works performed by other authors. In the work, a three-dimensional numerical model of a case from the BN-800 reactor was built in the ANSYS Fluent software package version 23.R2. Calculations of stationary temperature fields are performed by numerically solving conservation equations taking into account natural convection and thermal radiation for various values of residual SNF heat release. The conclusion is made about the influence of natural convection and radiant heat transfer on the thermal state of SNF.

Keywords

запроектная авария, numerical modeling, бассейн выдержки ОЯТ, out-of-project accident, отработавшее ядерное топливо, spent fuel storage, численное моделирование, spent nuclear fuel, тепломассообмен, heat and mass transfer

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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Average
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