Dispersed-flow film boiling of high-pressure water in a rod bundle. [PWR]
The following six dispersed flow film boiling correlations were assessed using data from the third ORNL transient film boiling experiment (Test 3.08.6C) conducted in the THTF: Dougall-Rohsenow; Dougall-Rohsenow (with Prandtl number evaluated at the wall temperature, as used in RELAP4-MOD7); Groeneveld 5.9; Groeneveld 5.7; Groeneveld-Delorme; and Condie-Bengston IV. The correlations were evaluated with bundle fluid conditions calculated using a homogeneous two-phase flow and thermodynamic equilibrium thermal-hydraulics code. Comparisons made between experimentally determined heat transfer coefficients and the individual correlation's heat transfer coefficients indicate that the Dougall-Rohsenow correlations often overpredict the heat transfer coefficients, while the Groeneveld 5.7, Groeneveld 5.9, and Condie-Bengston IV correlations tend to be in good agreement with the data. The Groeneveld-Delorme correlation underpredicts the data.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5083421
- Report Number(s):
- NUREG/CR-2183; ORNL/TM-7864; ON: DE82020498
- Country of Publication:
- United States
- Language:
- English
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ACCIDENTS
BOILING
COMPARATIVE EVALUATIONS
ENERGY TRANSFER
FILM BOILING
FLUID MECHANICS
FUEL ASSEMBLIES
FUEL ELEMENTS
FUEL RODS
HEAT TRANSFER
HYDRAULICS
LOSS OF COOLANT
MATHEMATICAL MODELS
MECHANICS
PHASE TRANSFORMATIONS
PWR TYPE REACTORS
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR SAFETY
REACTORS
SAFETY
TEMPERATURE GRADIENTS
TEST FACILITIES
WATER COOLED REACTORS
WATER MODERATED REACTORS