Qualification and Improvement of CATHARE 2V2.5 Flashing Model with Critical Flow Rate Experiments Data

In the paper, the qualification of flashing models of CATHARE 2 V2.5 revision 5 （Rev.5） and revision 6.1（Rev.6.1） is carried out. The concerned critical flow rate experiments include BETHSY nozzle and Super-Moby-Dick （SMD） nozzle tests. The calculated results with Rev.6.1 and with Rev.5 are compared in the paper. On the whole, a good agreement can be shown using two revisions. The prediction of critical flow rate using Rev.6.1 is better than that using Rev.5. For SMD nozzle tests, the Rev. 6 results indicate a better agreement with the experimental data. But for BETHSY nozzle tests, the prediction of Rev.6.1 is over-estimated. The sensitivity study for improving the flashing model is also introduced in the paper.