Bubble-induced mixing of two horizontal liquid layers with non-uniform gas injection at the bottom. [LMFBR]
During a postulated severe core meltdown accident in an LMFBR, a large amount of sodium coolant may spill into the reactor concrete cavity. A layer of liquid products may form as a result of the sodium-concrete reactions. The liquid product layer, which is highly viscous and much heavier than sodium, separates the concrete from the sodium pool. In general, the downward transport of sodium through the liquid product layer to the unreacted concrete surface, which controls the rate of chemical erosion of the concrete, depends strongly on the agitation induced by gas evolution from the heated concrete. In this study, experiments were conducted to explore the effect of non-uniform gas injection on mixing of two horizontal mutually soluble liquid layers. The liquid in the lower layer was chosen to be more viscous and heavier than the liquid in the upper layer. To simulate the reactor accident situation, gas was injected at the bottom of the liquid-liquid system through a circular hole that covered only the center portion of the bottom surface of the lower liquid layer. The bubble-induced mixing motions were observed and the rate of mixing was measured for different hole sizes and for various gas flow rates.
- Research Organization:
- Argonne National Lab., IL (USA); Cincinnati Univ., OH (USA). Dept. of Nuclear Engineering
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 6391495
- Report Number(s):
- CONF-841174-5; ON: DE85000097
- Resource Relation:
- Conference: 5. information exchange meeting on debris coolability, Los Angeles, CA, USA, 7 Nov 1984; Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
CONTAINMENT BUILDINGS
THERMAL STRESSES
LMFBR TYPE REACTORS
MELTDOWN
HEAT TRANSFER
HYDRAULICS
BUBBLES
CHEMICAL REACTIONS
CONCRETES
CRACKS
MIXING
REACTOR SAFETY
REACTOR VESSELS
SODIUM
ACCIDENTS
ALKALI METALS
BREEDER REACTORS
BUILDING MATERIALS
BUILDINGS
CONTAINERS
CONTAINMENT
ELEMENTS
ENERGY TRANSFER
EPITHERMAL REACTORS
FAST REACTORS
FBR TYPE REACTORS
FLUID MECHANICS
LIQUID METAL COOLED REACTORS
MATERIALS
MECHANICS
METALS
REACTOR ACCIDENTS
REACTORS
SAFETY
STRESSES
220900* - Nuclear Reactor Technology- Reactor Safety
210500 - Power Reactors
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