Modeling of thermal and hydrodynamic aspects of molten jet/water interactions
- Argonne National Lab., IL (USA)
In order to predict the effect of a fuel-coolant interaction after a hypothetical core-melt-down accident, a phenomenological model has been developed to describe the thermal and hydrodynamic behavior of a high-temperature molten jet when it interacts with saturated or subcooled water in a film boiling regime. The mechanisms of jet-material erosion were analyzed by Kelvin-Helmholtz instabilities on the coherent column and by boundary layer stripping on the leading edge. The heat transfer coefficient, vapor-film thickness, and net steam generation, all of which strongly affect the jet-breakup behavior, were solved analytically. It was found that the jet breakup (or erosion) depends strongly on the steam generation from the jet/water interaction. The jet-breakup length (i.e., penetration distance) was found to be sensitive to the initial jet temperature, water subcooling, and the physical state of the ambient water. The jet-breakup length and leading-edge velocity of the Wood's metal/water experiments are predicted well by the current model for the cases where a continuous vapor film exists. 14 refs., 13 figs.
- Research Organization:
- Argonne National Lab., IL (USA)
- Sponsoring Organization:
- NRC
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5677809
- Report Number(s):
- CONF-890819-22; ON: DE89017688
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
220100 -- Nuclear Reactor Technology-- Theory & Calculation
220900* -- Nuclear Reactor Technology-- Reactor Safety
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
990230 -- Mathematics & Mathematical Models-- (1987-1989)
ACCIDENTS
BOILING
COMPUTER CODES
COOLING
COOLING SYSTEMS
CORIUM
ENERGY SYSTEMS
ENERGY TRANSFER
EVAPORATION
FILM BOILING
FLUID MECHANICS
FUEL-COOLANT INTERACTIONS
HEAT TRANSFER
HYDRAULICS
HYDROGEN COMPOUNDS
JETS
MATHEMATICAL MODELS
MECHANICS
MELTDOWN
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTOR SAFETY
REACTORS
SAFETY
SUBCOOLING
WATER