Numerical analysis of supersonic gas jets into liquid pools with or without chemical reaction using the SERAPHIM program

Uchibori, Akihiro ; Ohshima, Hiroyuki; Watanabe, Akira*

To evaluate the behavior of the reaction jet and its effect on the adjacent tubes under the tube failure accident in a steam generator of sodium cooled fast reactors, a computer program called SERAPHIM for the compressible multiphase flow involving sodium-water chemical reaction has been developed. In this study, numerical analysis of supersonic gas jets into liquid pools with or without a chemical reaction was performed as a part of validation of the SERAPHIM program. In the analysis of the horizontal air jet into the water pool, the behavior of the jet was reproduced very well. The vertical injection of the chlorine jet into the mixture of the sodium and the sodium chloride was also analyzed. The numerical results showed that the injected gas disappeared at a certain height by the chemical reaction. The calculated penetration length agreed with the experimental data.