Thermal hydraulic and fission product release behavior during core/concrete interactions. Final report

Technical Report · Sun Aug 01 04:00:00 EDT 1993

OSTI ID:10184964

Kao, L S; Kazimi, M S ^[1]

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1. Massachusetts Inst. of Tech., Cambridge, MA (United States)

This report discusses several physical processes, including melt freezing, liquid/liquid interfacial heat transfer, layer mixing, and droplet entrainment, involved in the analysis of the molten core/concrete interaction which were investigated by scoping simulant experiments. Water and cyclohexane were used to form a multi-layer pool in a test unit designed with cooling capability and air injection through a porous plate. In the freezing tests with gas velocities in the range of 5 to 126 mm/s, a stable solidified layer was formed across the bubble agitated horizontal liquid solid interface, while no boundary crust was found at either the top surface or liquid/liquid interface. The interfacial heat transfer between the water and cyclohexane layers was measured under different air injection rates. The experimental data showed good agreement with both the modified Szekely model and the Lee and Kazimi model. In the layer mixing tests, it was found that the water and cyclohexane with density ratio of 0.7S were entirely mixed under a modest superficial gas velocity of 50 mm/s. The amount of liquid droplet entrainment measured in the simulant experiments agreed qualitatively with the Kataoka and Ishii model.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (United States); Massachusetts Inst. of Tech., Cambridge, MA (United States)
• Sponsoring Organization: Electric Power Research Inst., Palo Alto, CA (United States)
• OSTI ID: 10184964
• Report Number(s): EPRI-TR--102816; ON: UN93040930
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200
220900
99 GENERAL AND MISCELLANEOUS
990200
C CODES
COMPONENTS AND ACCESSORIES
COMPUTERIZED SIMULATION
CONCRETES
CONTAINMENT
CORIUM
FISSION PRODUCT RELEASE
HEAT TRANSFER
HYDRAULICS
INTERACTIONS
MATHEMATICAL MODELS
MATHEMATICS AND COMPUTERS
MELTDOWN
NUCLEAR POWER PLANTS
REACTOR LICENSING
REACTOR SAFETY
REGULATIONS