Abstract
Improvement of PWR thermal efficiency has a strong effect on the plant economy. The analysis of heat and mass flux in PWR Steam Generator (SG) is important for improving the thermal efficiency. In this study, the evaluation model of SG with economizer considering the effects of U-Tubes was developed to calculate the vapor flow rate and the pressure drop. The comparison with the measured pressure drop of KWU type SG with economizer of Grafenrheinfeld PWR plant was done. The prediction of pressure drop accuracy was relative good and the improvement of void fraction was needed.
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