Evaluation of Water Fragmentation at the Initial Stage of Its Entry into a High-temperature Melt from a Point Source
DOI:
https://doi.org/10.24160/1993-6982-2026-3-145-159Keywords:
Rayleigh-Taylor instability, hydrodynamics, steam-water cavity, fragmentation, ATHLET codeAbstract
The initial stage of steam-water cavity expansion in a high-temperature melt resulting from a steam generator heat-transfer tube rupture in a heavy liquid metal cooled reactor is numerically studied. The flowrate and enthalpy of the steam-water mixture going out from the rupture in the critical mode were calculated using the ATHLET best estimate thermal hydraulic code. In doing so, the outflow line from the header to the rupture location was modeled. The cavity expansion process was calculated using a steam-water mixture equilibrium point model coupled through the Rayleigh-Plesset equation to a spherically symmetric incompressible fluid model describing the melt flow. The calculated time dependences of the cavity characteristics were used to estimate water fragmentation in this process based on the Rayleigh-Taylor hydrodynamic stability theory. It has been shown that for the system parameter values considered, there is no noticeable energy interaction of water with the melt at this stage of the process under study.
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Для цитирования: Финошкина Д.В., Мелихов О.И., Мелихов В.И., Шпаковский А.А. Оценка фрагментации воды на начальной стадии её поступления в высокотемпературный расплав из точечного источника // Вестник МЭИ. 2026. № 3. С. 145—159. DOI: 10.24160/1993-6982-2026-3-145-159
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Работа выполнена при поддержке Российского научного фонда (проект № 21-19-00709), https://rscf.ru/pro-ject/21-19-00709/
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Конфликт интересов: авторы заявляют об отсутствии конфликта интересов
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For citation: Finoshkina D.V., Melikhov O.I., Melikhov V.I., Shpakovsky A.A. Evaluation of Water Fragmentation at the Initial Stage of Its Entry into a High-temperature Melt from a Point Source. Bulletin of MPEI. 2026;3:145—159. (in Russian). DOI: 10.24160/1993-6982-2026-3-145-159
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The Work was Supported by the Russian Science Foundation (Project No. 21-19-00709), https://rscf.ru/project/21-19-00709/
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Conflict of interests: the authors declare no conflict of interest
