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Title: Experimental investigation on heat transfer for two-phase flow under natural convection

Abstract

In the frame of severe accident research for the second and the third generation of nuclear power plants, some aspects of the concrete cavity ablation during the molten corium - concrete interaction are still remaining issues. The determination of heat transfer along the interfacial region between the molten corium pool and the ablating basemat concrete is crucial for the assessment of concrete ablation progression and eventually the basemat melt-through. For the purpose of experimental investigation of thermal-hydraulics inside a liquid pool agitated by gas bubbles, the CLARA project has been launched jointly by CEA, EDF, IRSN, GDF-Suez and SARNET. The CLARA experiments are performed using simulant materials and they reveal the influence of superficial gas velocity, liquid viscosity and pool geometry on the heat transfer coefficient between the internally heated liquid pool and vertical and horizontal pool walls maintained at uniform temperature. The first test campaign has been conducted with the smallest pool configuration (50 cm x 25 cm x 25 cm). The tests have been performed with liquids covering a wide range of dynamic viscosity from approximately 1 mPa s to 10000 mPa s. This paper presents some preliminary conclusions deduced from the experiments which involve a liquid poolmore » with the gas injection only from the bottom plate. A comparison with existing models for the assessment of heat transfer has also been carried out. (authors)« less

Authors:
; ;  [1]
  1. CEA, DEN-DTN, Grenoble, (France)
Publication Date:
OSTI Identifier:
22273991
Resource Type:
Conference
Resource Relation:
Conference: 20. International Conference on Nuclear Engineering and the ASME 2012 Power Conference, Anaheim, CA (United States), 30 Jul - 3 Aug 2012; Other Information: Country of input: France; This record replaces 45095224
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; ACCIDENTS; CONCRETES; CORIUM; HEAT TRANSFER; NATURAL CONVECTION; THERMAL HYDRAULICS; TWO-PHASE FLOW; VISCOSITY

Citation Formats

Amizic, Milan, Guyez, Estelle, and Seiler, Jean-Marie. Experimental investigation on heat transfer for two-phase flow under natural convection. United States: N. p., 2012. Web. doi:10.1115/ICONE20-POWER2012-55225.
Amizic, Milan, Guyez, Estelle, & Seiler, Jean-Marie. Experimental investigation on heat transfer for two-phase flow under natural convection. United States. doi:10.1115/ICONE20-POWER2012-55225.
Amizic, Milan, Guyez, Estelle, and Seiler, Jean-Marie. Sun . "Experimental investigation on heat transfer for two-phase flow under natural convection". United States. doi:10.1115/ICONE20-POWER2012-55225.
@article{osti_22273991,
title = {Experimental investigation on heat transfer for two-phase flow under natural convection},
author = {Amizic, Milan and Guyez, Estelle and Seiler, Jean-Marie},
abstractNote = {In the frame of severe accident research for the second and the third generation of nuclear power plants, some aspects of the concrete cavity ablation during the molten corium - concrete interaction are still remaining issues. The determination of heat transfer along the interfacial region between the molten corium pool and the ablating basemat concrete is crucial for the assessment of concrete ablation progression and eventually the basemat melt-through. For the purpose of experimental investigation of thermal-hydraulics inside a liquid pool agitated by gas bubbles, the CLARA project has been launched jointly by CEA, EDF, IRSN, GDF-Suez and SARNET. The CLARA experiments are performed using simulant materials and they reveal the influence of superficial gas velocity, liquid viscosity and pool geometry on the heat transfer coefficient between the internally heated liquid pool and vertical and horizontal pool walls maintained at uniform temperature. The first test campaign has been conducted with the smallest pool configuration (50 cm x 25 cm x 25 cm). The tests have been performed with liquids covering a wide range of dynamic viscosity from approximately 1 mPa s to 10000 mPa s. This paper presents some preliminary conclusions deduced from the experiments which involve a liquid pool with the gas injection only from the bottom plate. A comparison with existing models for the assessment of heat transfer has also been carried out. (authors)},
doi = {10.1115/ICONE20-POWER2012-55225},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {7}
}

Conference:
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