1. Research of PWR Pressurizer Insurge Characteristics on Three-Dimensional Transient Modeling
- Author
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Jingda Shi, Liu Jianquan, Li Dong, and Zhang Jiguo
- Subjects
Materials science ,Buoyancy ,Article Subject ,Turbulence ,business.industry ,020209 energy ,Pressurized water reactor ,Multiphase heat transfer ,02 engineering and technology ,Mechanics ,Computational fluid dynamics ,engineering.material ,law.invention ,Nuclear Energy and Engineering ,law ,Pressurizer ,Heat transfer ,0202 electrical engineering, electronic engineering, information engineering ,engineering ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,business ,lcsh:TK1-9971 ,Intensity (heat transfer) - Abstract
In order to study the evolution process and hydraulic characteristics of pressurizer insurge in CPR1000 pressurized water reactor (PWR), the computational fluid dynamics (CFD) of three-dimensional unsteady heat transfer was used to capture the temperature and velocity fluctuation intensity of the mixing of the hot and cold. The results show that Realizable k–ε Turbulence Model combined with VOF multiphase heat transfer model can effectively predict the development trend of pressurizer insurge process. The small diameter pressurizer surge line of CPR1000 enhances the intensity of velocity fluctuation. From the essence of flow and heat transfer, it is concluded that buoyancy force can increase the degree of fluctuation and make an accelerated effect on the influx cold fluid. The electric heater inside the pressurizer should be arranged as far as possible in z0.45m; it is beneficial to improve its harsh operating environment. This research can provide reference for the structural design of pressurizer and the layout optimization of the electric heater.
- Published
- 2018