Thermalhydraulic aspects of decay heat removal by natural circulation in fast reactor systems
Thermalhydraulic aspects of decay heat removal by natural circulation in fast reactor systems
Natural convection in enclosures have been studied numerically to provide insight into the scaling laws existing for removal of decay heat in Liquid Metal Fast Reactors (LMFR). Specifically, 3-D simulations have been carried out for natural circulation in a cylinder with small aspect ratio (of the order of 0.5). These results have been compared to the results of an experiment conducted by UCSB, in collaboration with GE, to provide benchmark data for code validation. Parametric studies have been conducted to establish the validity of a 3-D Finite difference code that uses body-fitted grids for simulations of complex geometries. Further, numerical simulations have been carried out to demonstrate the importance of 3-D computer codes as tools in the design and scale-up of prototype LMFRs. It has been shown that the geometry of the passive safety systems is key to safe operation of LMFRs under shutdown conditions. The key phenomena that occur in such situations have bee studied and the available experimental studies have been identified. The future direction for modeling of natural convection recirculating flows in confined enclosures has been proposed. 31 refs.
- University of North Texas United States
Numerical Solution, Equations, Finite Difference Method, F Codes, Hydraulics, 990200 -- Mathematics & Computers, Navier-Stokes Equations, Fluid Mechanics, Breeding, 21 Specific Nuclear Reactors And Associated Plants, Mechanics, Convection, Simulation 210500* -- Power Reactors, Fbr Type Reactors, Lmfbr Type Reactors, Differential Equations, Three-Dimensional Calculations, Mass Transfer, Computerized Simulation, Natural Convection, Progress Report, Computer Codes, Benchmarks, Breeder Reactors, Computing, Partial Differential Equations, Heat Transfer, Reactors, Document Types, 99 General And Miscellaneous//Mathematics, Energy Transfer, Fast Reactors, Epithermal Reactors, And Information Science, Iterative Methods, Liquid Metal Cooled Reactors
Numerical Solution, Equations, Finite Difference Method, F Codes, Hydraulics, 990200 -- Mathematics & Computers, Navier-Stokes Equations, Fluid Mechanics, Breeding, 21 Specific Nuclear Reactors And Associated Plants, Mechanics, Convection, Simulation 210500* -- Power Reactors, Fbr Type Reactors, Lmfbr Type Reactors, Differential Equations, Three-Dimensional Calculations, Mass Transfer, Computerized Simulation, Natural Convection, Progress Report, Computer Codes, Benchmarks, Breeder Reactors, Computing, Partial Differential Equations, Heat Transfer, Reactors, Document Types, 99 General And Miscellaneous//Mathematics, Energy Transfer, Fast Reactors, Epithermal Reactors, And Information Science, Iterative Methods, Liquid Metal Cooled Reactors
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