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- W87994167 abstract "The high-pressure ejection of molten core material from the vessel of a nuclear reactor would cause dispersal and small droplet formation, which leads to direct containment heating (DCH). As a consequence, the pressure in the containment would rise. Also, the chemical reactions between the corium droplets and the steam would produce hydrogen, adding another source of pressurization. The objective of this work is to perform a separate-effects experiment to obtain data for corium dispersal and droplet size distribution for an annular reactor cavity geometry. These data could then be used to develop correlations for the source terms in a computer code for containment pressure evaluation. To formulate models for mass dispersal and droplet size distribution, it is essential to understand the droplet entrainment mechanisms. Once this is known, the heat transfer and chemical reaction rates may be calculated to determine the level of pressurization. However, the mechanisms of droplet entrainment are complicated and the conditions are different from the well-known cases (i.e., annular flow), so experimental work is required. A good review of DCH experiments has been provided by Corradini. These experiments have simulated the Zion cavity and containment configuration, and the focus has been on measuring the containment pressure.more » There are practically no separate-effects data, such as droplet size distribution. Therefore, it is difficult to develop mechanistic models. Moreover, droplet entrainment and mass dispersal are strongly dependent on containment geometry. Therefore, experiments are needed for different geometries to Zion.« less" @default.
- W87994167 created "2016-06-24" @default.
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- W87994167 date "1993-01-01" @default.
- W87994167 modified "2023-09-23" @default.
- W87994167 title "Direct containment heating experiment for annular reactor cavity geometry" @default.
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