COMMIX-1A analysis of fluid and thermal mixing in a model cold leg and downcomer of a PWR
Technical Report
·
OSTI ID:7063555
Fluid and thermal mixing in a model cold leg and downcomer of a PWR was analyzed using COMMIX-1A. The present analysis differs from previous analyses reported in EPRI NP-3321 in three major aspects. First, extremely fine meshes were used to minimize numerical diffusion in the analysis. Second, one-equation (k) turbulence model was used to better model the turbulent flow. Third, curved surfaces were modeled by several slanted planes to better represent the geometries. By using these improvements, CREARE 1/5-scale test No. 51 was reanalyzed. Significant improvements were achieved in the comparisons between the COMMIX-1A calculations and the experimental data.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 7063555
- Report Number(s):
- EPRI-NP-3557; ON: DE84015099
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
C CODES
COMPUTER CODES
COOLING SYSTEMS
ENERGY SYSTEMS
FLUID FLOW
FLUID MECHANICS
HYDRAULICS
MECHANICS
MIXING
PWR TYPE REACTORS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTORS
THERMAL SHOCK
TRANSIENTS
TURBULENT FLOW
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
C CODES
COMPUTER CODES
COOLING SYSTEMS
ENERGY SYSTEMS
FLUID FLOW
FLUID MECHANICS
HYDRAULICS
MECHANICS
MIXING
PWR TYPE REACTORS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTORS
THERMAL SHOCK
TRANSIENTS
TURBULENT FLOW
WATER COOLED REACTORS
WATER MODERATED REACTORS