kaz29Вестник Казахстанско-Британского технического университетаHerald of the Kazakh-British Technical University1998-66882959-8109Казахстанско-Британский Технический Университет10.55452/1998-6688-2026-23-2-401-417kaz29-2922Research ArticleФИЗИЧЕСКИЕ НАУКИPHYSICAL SCIENCESИССЛЕДОВАНИЕ НЕЙТРОНИКИ И ТЕПЛОГИДРАВЛИКИ РЕАКТОРА С ВОДОЙ ПОД ДАВЛЕНИЕМ И ТОПЛИВОМ НА ОСНОВЕ ТОРИЯNEUTRONICS AND THERMAL-HYDRAULICS OF PRESSURIZED WATER REACTOR WITH THORIUM-BASED FUELhttps://orcid.org/0009-0007-7861-4917АрынгазинА.AryngazinA.

MSc.

Астана

MSc.

Astana

ansar.aryngazin@nu.edu.kzhttps://orcid.org/0000-0003-0928-521XКурбановаБ.KurbanovaB.

PhD.

Астана

MSc.

Astana

bayan.kurbanova@nu.edu.kzСизюкЮ.SizyukY.

PhD. Кафедра машиностроения и ядерной инженерии.

Вирджиния

PhD.Depart. Mech. Nucl. Engin.

VA USA

yuriy.sizyuk@nu.edu.kzhttps://orcid.org/0000-0002-9526-3617ТемирбаеваА.TemirbayevaA.

M.Sc.

Астана

M.Sc.

Astana

assem.zkgmu@gmail.comhttps://orcid.org/0000-0001-7287-7555АлсарЖ.AlsarZh.

PhD.

Астана

PhD.

Astana

zhanna.alsar@nu.edu.kzhttps://orcid.org/0000-0002-8079-6293ИнсеповЗ.InsepovZ.

Доктор наук, PhD, адъюнкт-профессор.

Астана

D.Sc. PhD, Adj. Professor.

Astana

zinsepov@nu.edu.kzИсследовательская администрация Назарбаевского университетаКазахстанNazarbayev University Research AdministrationKazakhstanУниверситет Содружества ВирджинииСоединённые Штаты АмерикиVirginia Commonwealth UniversityUnited StatesЕвразийский национальный университет им. Л.Н. ГумилеваКазахстанEurasian National University named after GumilevKazakhstan202627062026232401417Copyright © Арынгазин А., Курбанова Б., Сизюк Ю., Темирбаева А., Алсар Ж., Инсепов З., 20262026Арынгазин А., Курбанова Б., Сизюк Ю., Темирбаева А., Алсар Ж., Инсепов З.Aryngazin A., Kurbanova B., Sizyuk Y., Temirbayeva A., Alsar Z., Insepov Z.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestnik.kbtu.edu.kz/jour/article/view/2922

В данной работе динамика тепло-гидравлических явлений, а также явлений механики твердого тела была смоделирована методом конечных элементов с использованием Comsol Multiphysics. Для изучения нейтроники был применен OpenMC в приближении стационарной нейтроники. Для оптимизации активной зоны ториевого реактора в качестве охладителя использовалась легкая вода под высоким давлением. В активной зоне располагались 49 топливных стержней, заполненные соединениями тория, организованные в виде регулярной – решеточной геометрии. Моделирование переноса нейтронов методом Монте-Карло в пакете OpenMC позволило получить эффективное значение коэффициента размножения k_eff и пространственное распределение мощности рассматриваемой модели. Были получены детальные теплои гидравлические расчеты – температурный и скоростные профили, в то время как механика твердого тела определила пространственное распределение напряжений и деформаций. Результаты подтвердили применимость и эффективность использования метода совмещения стационарной нейтроники с термогидравликой и структурного анализа для оценки и оптимизации ториевых реакторов с водным охлаждением.

In the present study, the coupled behavior of thermal-hydraulic processes and solid mechanics phenomena was investigated using the finite element method implemented within the COMSOL Multiphysics environment. Neutronic analyses were performed using the OpenMC code under the steady-state neutron transport approximation. To optimize the core configuration of a thorium-fueled pressurized water reactor (PWR), high-pressure light water was selected as the coolant and moderator. The reactor core was composed of 49 fuel rods containing thorium-based fuel compounds arranged in a regular lattice configuration. Monte Carlo neutron transport simulations conducted with OpenMC enabled the evaluation of the effective neutron multiplication factor (k_eff) and the spatial power distribution within the reactor core. Thermal-hydraulic calculations yielded detailed temperature and coolant velocity distributions, while solid mechanics analyses provided the corresponding spatial distributions of stresses and deformations arising under operational conditions. The obtained results demonstrate the applicability and effectiveness of a coupled multiphysics approach integrating steady-state neutronics with thermal-hydraulic and structural analyses for the assessment and optimization of thorium-fueled pressurized water reactor systems.

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The authors declare that there are no conflicts of interest present.