glonucsecГлобальная ядерная безопасностьGlobal Nuclear Safety2305-414X2499-9733National Research Nuclear University "MEPhI"10.26583/gns-2020-02-06glonucsec-23Research ArticleЭКСПЛУАТАЦИЯ ОБЪЕКТОВ АТОМНОЙ ОТРАСЛИOPERATION OF FACILITIES NUCLEAR INDUSTRYИССЛЕДОВАНИЕ ИЗМЕНЕНИЯ КОНЦЕНТРАЦИИ ПОГЛОТИТЕЛЯ ПРИ РАБОТЕ РЕАКТОРА ВВЭР-1000 В РЕЖИМЕ МАНЕВРИРОВАНИЯInvestigation of Absorber Concentration Changes During Maneuvering Operation in VVER 1000 Reactorhttps://orcid.org/0000-0001-7803-8234Анисур РахманС. К.AnisurR. S.ranisur01@gmail.comhttps://orcid.org/0000-0002-4917-1770УвакинМ. А.UvakinM. A.uvakin_ma@grpress.podolsk.ruНациональный исследовательский ядерный университет «МИФИ»РоссияNational Research Nuclear University Moscow Engineering Physics Institute (NRNU MEPhI)Russian Federation202001062020028391Copyright © Анисур Рахман С.К., Увакин М.А., 20222022Анисур Рахман С.К., Увакин М.А.Anisur R.S., Uvakin M.A.This work is licensed under a Creative Commons Attribution 4.0 License.https://glonucsec.elpub.ru/jour/article/view/23

В работе исследуется изменение нейтронно-физических свойств поглощающих материалов, применяемых в органах регулирования РУ ВВЭР с учетом маневренных режимов. Основным из таких материалов является карбид бора. В случае продолжительного применения режимов суточного маневрирования мощностью концентрация основного поглощающего элемента - бора - будет существенно снижаться. Это может приводить к изменению эффективности органов регулирования, что будет влиять как на алгоритмы маневрирования, так и на эффективность всей аварийной защиты. В работе приведены оценки снижения эффективности органов регулирования, а также исследован ряд других материалов, для которых такой эффект существенно снижается. Расчеты выполнялись на уровне моделей ТВС при помощи программных кодов GETERA, WIMS и SERPENT.

Boron carbide, Dysprosium, Silver, etc have a lot of unique properties, high neutron absorption, chemical stability, high melting temperature, low density, and low price. These elements are widely using in the VVER power reactors. In this article was investigated the absorber cross-section, burring behavior and scram efficiency of these elements. If the control rod (CR) is made of only boron carbide chemical element and it will be used in the maneuvering mode then the power of a reactor will fall down drastically. But in this work main goal is that, which element will be required in the control rod, as a result, the reactor in the maneuvering mode work with different power without fall down power drastically. The result was calculated by the three programs GETERA, WIMS and SERPENT.

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