glonucsecГлобальная ядерная безопасностьGlobal Nuclear Safety2305-414X2499-9733National Research Nuclear University "MEPhI"10.26583/gns-2020-01-07glonucsec-135Research ArticleЭКСПЛУАТАЦИЯ ОБЪЕКТОВ АТОМНОЙ ОТРАСЛИOPERATION OF FACILITIES NUCLEAR INDUSTRYНЕОПРЕДЕЛЕННОСТЬ В РАСЧЕТАХ ИЗ-ЗА «МГНОВЕННЫХ» АВАРИЙНЫХ СИТУАЦИЙ НА ВВЭР-1000https://orcid.org/0000-0003-0365-2533НиконовС. П.NikonovS. P.SPNikonov@mephi.ruhttps://orcid.org/0000-0003-4890-6920АмерД. А.AmerD. A.Dina.amer@alexu.edu.egНациональный исследовательский ядерный университет «МИФИ»РоссияInstitute of Nuclear Physics and Technology (INP&T), National Research Nuclear University «MEPhI»Russian FederationАлександрийский УниверситетРоссияAlexandria UniversityRussian Federation202001032020016272Copyright © Никонов С.П., Амер Д.А., 20222022Никонов С.П., Амер Д.А.Nikonov S.P., Amer D.A.This work is licensed under a Creative Commons Attribution 4.0 License.https://glonucsec.elpub.ru/jour/article/view/135

В работе показано возникновение волн давления и их распространение в оборудовании первого контура реакторной установки ВВЭР-1000 при аварийных ситуациях, связанных с мгновенной остановке Главного циркуляционного насоса или двухстороннем истечении при мгновенном двухстороннем разрыве в холодной нитке главного циркуляционного трубопровода. Исследуется влияние времени инициализации аварии (остановки насоса, разрыва трубопровода) на интенсивность процесса -амплитуду, частоту изменения давления. Рассматриваются перепады давления в процессе аварийной ситуации на основных элементах контура. Показано, что максимальные изменения в амплитуде и частоте, как самого давления, так и перепадов давления на элементах контура относятся к начальной стадии аварии. Основное внимание направлено на перепады давления на оборудовании, т.к. именно этот параметр определяет динамические нагрузки на оборудование, которые могут привести к выходу его из строя.

The paper shows the occurrence of pressure waves and their propagation in the equipment of the first circuit of the WWER-1000 reactor plant in emergency situations associated with an instantaneous stop of the Main circulation pump or a two-way flow with an instantaneous two-way break in the cold thread of the main circulation pipeline. The influence of the time of initialization of the accident (pump stop, pipeline rupture) on the intensity of the process-amplitude, frequency of pressure changes is investigated. Pressure drops during an emergency on the main elements of the circuit are considered. It is shown that the maximum changes in the amplitude and frequency of both the pressure and the pressure drops on the circuit elements belong to the initial stage of the accident. The main attention is focused on the pressure drops on the equipment, because this parameter determines the dynamic loads on the equipment, which can lead to its failure.

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