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Single droplet heat and mass transfer modelling for nuclear containment spray applications – SARNET-2 benchmark

pubblicazioni - Articolo

Single droplet heat and mass transfer modelling for nuclear containment spray applications – SARNET-2 benchmark

Descrizione dei principali risultati ottenuti con le attività sperimentali e modellistiche concernenti il primo benchmark (progetto SARNET-2, 7° EU Framework Program) relativo a scambi massa ed energia di gocce d’acqua in moto all’interno di un ambiente controllato.

This work is performed in the frame of the SARNET-2 network (EURATOM), within the Sub-Work Package WP7-2, Task 1 (spray activities). Three different elementary test series have been proposed for benchmarking and the first serie, concerning heat and mass transfer on a single droplet, is presented here. Code-experiment and code-to-code comparisons are presented. It is shown that the mass transfer terms are responsible for most of the differences observed and, depending on the kind of test, that the errors can either compensate together or be enhanced. Since the errors are propagating over the droplet height fall, they could be not negligible for real containment cases. As a result, considering the importance of heat and mass transfer rates for the depressurization of a nuclear containment when spray is activated, correct results of these experiments are expected for numerical codes involved in safety analysis.

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