glonucsecГлобальная ядерная безопасностьGlobal Nuclear Safety2305-414X2499-9733National Research Nuclear University "MEPhI"10.26583/gns-2022-04-07glonucsec-172Research ArticleЭКСПЛУАТАЦИЯ ОБЪЕКТОВ АТОМНОЙ ОТРАСЛИOPERATION OF FACILITIES NUCLEAR INDUSTRYВЛИЯНИЕ ЗАВИСИМОСТИ РАСПРЕДЕЛЕНИЯ ТЕМПЕРАТУРЫ ТОПЛИВА НА НЕЙТРОННО-ФИЗИЧЕСКИЕ ХАРАКТЕРИСТИКИ АКТИВНОЙ ЗОНЫ С ВВЭР-1000 (1200)Influence of Fuel Temperature Distribution Dependence on Neutron-Physical Characteristics of Nuclear Core with WWER-1000 (1200)https://orcid.org/0000-0003-4458-7264Аль МалкавиРашдан ТалалAl MalkawiR. T.rashdanmalkawi@gmail.comhttps://orcid.org/0000-0001-8355-7207ЗаиданЛаит ДжамильZadanL. J.l.zaidan@tamu.eduИорданский исследовательский и учебный реактор (JRTR)РоссияJordan Research and Training Reactor (JRTR)Russian FederationТехасский университет A&MРоссияTexas A&M University Техасский университет А&МRussian Federation2022121020224546978Copyright © Аль Малкави Р.Т., Заидан Л.Д., 20222022Аль Малкави Р.Т., Заидан Л.Д.Al Malkawi R.T., Zadan L.J.This work is licensed under a Creative Commons Attribution 4.0 License.https://glonucsec.elpub.ru/jour/article/view/172

В работе представлены результаты исследований физических явлений, определяющих параметры ксеноновых колебаний. В том числе уточнена зависимость нейтрон-но-физических характеристик активной зоны ВВЭР-1000 (1200) от температурного распределения в топливе и его влияния на параметры ксеноновых процессов в зоне. Разработан усовершенствованный метод расчета резонансного поглощения в238UO2 (эффект доплеровской реактивности) с неоднородным температурным профилем. Результаты расчета параметров ксеноновых колебаний были рассчитаны с помощью комплексной программы PROSTOR. Валидность усовершенствованного метода была проверена путем сравнения рассчитанных параметров ксенона с результатами измерений, полученными при пусконаладочных испытаниях энергоблоков реактора ВВЭР-1000. Результаты показали более точный расчет резонансного поглощения в238UO2, они значительно уменьшают стабилизацию уширения эффекта Доплера, следовательно, эти факты имеют жизненно важное значение в случае работы реактора в маневренных режимах, сопровождающегося ксеноновыми процессами в активной зоне. Усовершенствованный способ внедрен в компьютерное программное обеспечение Полномасштабного тренажера 3-го энергоблока Ростовской АЭС и полномасштабного тренажера 4-го энергоблока Калининской АЭС. Метод был опробован в ходе приемо-сдаточных испытаний этих полномасштабных тренажеров.

This paper presents the results of the influence of reactivity on fuel temperature distribution for the neutron-physical characteristics of WWER 1000-1200 cores, which in turn affects the parameters of Xenon oscillation. The improved method for calculating Resonance Absorption in a238UO2 (Doppler reactivity effect) with a Nonuniform Temperature Profile are developed. The parameters calculation results for Xenon oscillations have been calculated using complex program PROSTOR. The validation of the improved method was examined by comparing the calculated xenon parameters to measurement results obtained during commissioning tests of WWER-1000 reactor power units. Results showed a more accurate calculation for the Resonance Absorption in a238UO2, they significantly reduce the stabilization of Doppler Effect broadening, hence these facts, are vital importance in the case of load following mode accompanied by Xenon processes in the core. The improved method is implemented into the computer-software of the Full-Scale Simulator of the 3rd Power Unit of the Rostov NPP and the Full-Scale Simulator of the 4th Power Unit of the Kalinin NPP. The method was tested during acceptance tests of these Full-Scale Simulators.

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