Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2001, Vol. 12 ›› Issue (1): 53

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Computational analysis for prediction of pressure of PWR presurizer under transient conditions

MAHMOOD Arshad, XU Ji-Jun   

  1. Department of Nuctear Power Engineering ond Automation, School of Power and Energy Engineering, Shanghai Jiaotong University, Shanghai 200030
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MAHMOOD Arshad, XU Ji-Jun. Computational analysis for prediction of pressure of PWR presurizer under transient conditions.Nuclear Science and Techniques, 2001, 12(1): 53

Abstract: A computer model has been developed for prediction of the pressure in the pressurizer under transient conditions, In the model three separate thermodynamic regions which are not reqnired to be in thermal equilibrium have been considered The mathematical model derived from the general conservation equations includes all of the important thermal-hydranlics phenomena occurring in the pressurizer. ie.. stratification of the hot water and incoming cold water. bulk flashing and condensation, wall condensation, and interfacial heat and mass transfer, etc. The bubbie rising and rain-out models are developed to describe bulk flashing and condensation, respectively. To obtain the wall condensation rate, a one-dimensional heat conduction equation is solved by the pivoting method. The presented model will predict the pressure-time behavior of a PWR pressurizer during a variety of transients. The results obtained from the proposed mathematical model are in good agreement with available data ou the CHASHMA nuclear power plant's pressutizer performance,

Key words: Pressusized water reactor (PW), Pressure of pressurizer under transient conditions, Thermal-hydraulics computation