1. The development of a closed-form analytical model for the stability analysis of nuclear-coupled density-wave oscillations in boiling water nuclear reactors
- Author
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Michael Z. Podowski, Shie J. Peng, Martin Becker, Richard T. Lahey, and Goon-Cherl Park
- Subjects
Nuclear and High Energy Physics ,Neutron transport ,Materials science ,Mathematical model ,Mechanical Engineering ,Fluid mechanics ,Mechanics ,Nuclear reactor ,law.invention ,Coolant ,Subcooling ,Nuclear Energy and Engineering ,Control theory ,law ,Boiling ,Heat transfer ,General Materials Science ,Safety, Risk, Reliability and Quality ,Waste Management and Disposal - Abstract
A state-of-the-art one-dimensional thermal-hydraulic model has been developed to be used for the linear analysis of nuclear-coupled density-wave oscillations in a boiling water nuclear reactor (BWR). This model accounts for phasic slip, distributed spacers, subcooled boiling, space/time-dependent power distributions and distributed heated wall dynamics. In addition to a parallel channel stability analysis, a detailed model was derived for the BWR loop analysis of both the natural and forced circulation modes of operation. The model for coolant thermal-hydraulics has been coupled with the point kinetics model of reactor neutronics. Kinetics parameters for use in the neutronics model have been obtained by utilizing self-consistent nodal data and power distributions. The computer implementation of this model, NUFREQ-N, was used for the parametric study of a typical BWR/4, as well as for comparisons with existing in-core and out-of-core data. Also, NUFREQ-N was applied to analyze the expected stability characteristics of a typical BWR/4.
- Published
- 1986