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- W2894900602 abstract "Thermal status or temperature distribution in terms of mixing or stratification inside a suppression pool (SP) is decisive for containment pressure and hence reactor safety. Numerical models were developed in this study to predict the temperature distribution inside a scaled-down SP with steam injected through a horizontal pipe. Regarding the modeling of injected steam, two methods were compared. Effective source (ES) method, which considers the effective heat and momentum source instead of calculating condensing steam directly, can predict the stratified thermal status but failed to reproduce the mixing thermal status. The reason may be attributed to the lack of an appropriate momentum source model. Direct contact condensation (DCC) method, which calculates the condensation process directly, can give agreeable results with experiments and successfully distinguish between mixing or stratification thermal status. In addition, the DCC method can also predict the transition between mixing and stratification. However, moment of the transition was found to deviate from measurement. It was assumed the measurement and proper modeling of the gas-liquid interface structures is necessary for improvement of the simulation. Besides, reasons for the above thermal statuses were analyzed by fluid velocity fields, and it was shown that stratification can be avoided if the injection location is moved downside. The numerical methods proposed can be used for design and improvement of thermal features of SP." @default.
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- W2894900602 date "2018-12-01" @default.
- W2894900602 modified "2023-10-17" @default.
- W2894900602 title "Numerical investigation on thermal status of a scaled-down suppression pool" @default.
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- W2894900602 doi "https://doi.org/10.1016/j.nucengdes.2018.10.003" @default.
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