Advancement of sodium-water reaction and compressible multiphase flows analysis program SERAPHIM; Validation for a reactive gas jet in a liquid pool

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

A computer program called SERAPHIM has been developed to calculate the compressible multiphase flow involving the sodium-water reaction under a tube failure accident in a steam generator of sodium cooled fast reactors. In this study, numerical analysis of supersonic gas jets into liquid pools with or without chemical reaction was performed to validate the proposed numerical methods. As validation for a non-reaction problem, the experiment on the horizontal supersonic air jet into the water was analyzed. The behavior of the jet and the penetration length were reproduced well. On the other hand, the experiment on the vertical supersonic chlorine jet into the Na-NaCl mixture was analyzed. The numerical result showed that the injected gas disappeared at a certain height by the chemical reaction. The estimated plume length showed good agreement with the experimental data. The numerical methods were found to be applicable to the compressible multiphase flow with the chemical reaction.