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Title: Bubble-induced mixing of two horizontal liquid layers with non-uniform gas injection at the bottom. [LMFBR]

Abstract

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.

Authors:
; ;
Publication Date:
Research Org.:
Argonne National Lab., IL (USA); Cincinnati Univ., OH (USA). Dept. of Nuclear Engineering
OSTI Identifier:
6391495
Report Number(s):
CONF-841174-5
ON: DE85000097
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Conference
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
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 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, Breeding

Citation Formats

Cheung, F B, Leinweber, G, and Pedersen, D R. Bubble-induced mixing of two horizontal liquid layers with non-uniform gas injection at the bottom. [LMFBR]. United States: N. p., 1984. Web.
Cheung, F B, Leinweber, G, & Pedersen, D R. Bubble-induced mixing of two horizontal liquid layers with non-uniform gas injection at the bottom. [LMFBR]. United States.
Cheung, F B, Leinweber, G, and Pedersen, D R. 1984. "Bubble-induced mixing of two horizontal liquid layers with non-uniform gas injection at the bottom. [LMFBR]". United States. https://www.osti.gov/servlets/purl/6391495.
@article{osti_6391495,
title = {Bubble-induced mixing of two horizontal liquid layers with non-uniform gas injection at the bottom. [LMFBR]},
author = {Cheung, F B and Leinweber, G and Pedersen, D R},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/6391495}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1984},
month = {Sun Jan 01 00:00:00 EST 1984}
}

Conference:
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