[en] The fluidic device controls the discharge flow rate during LBLOCA (Large Break-Loss of Cooling Accident). For the assessment of the device performance, a prototypical full scale test facility, called VAPER (Valve Performance Evaluation test Rig), had been constructed, and the performance of the fluidic device had been validated without considering nitrogen solubility. Present paper shows the recent VAPER results including the solubility effect. Full scale experiments for the assessment of a fluidic device in SIT were performed. The influences of the N₂ gas solubility in ECC water on the K factor are analyzed. Finally, tests were done for various pressure, temperature and solubility conditions. As a result, a significant change in solubility did affect a little portion of the K factor in the low flow rate case