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Equilibrium considerations in aerosol formation during sodium combustion
A. Subramani,
Published in
2008
Volume: 238
   
Issue: 10
Pages: 2739 - 2745
Abstract
Combustion of liquid sodium is of interest in the safety assessment of liquid metal cooled fast breeder reactor systems. In the present study, a detailed thermodynamic analysis of sodium-air system has been carried out for equivalence ratios in the range of 0.1-1.9 and for flame temperatures ranging from 1100 to 1950 K. In addition to this, decomposition calculations presented for product aerosols such as sodium oxide (Na2O), sodium dioxide (Na2O2) and sodium hydroxide (NaOH) in normal oxygen and oxygen-deficient conditions (which are some form of phase diagrams of these aerosols) are used rigorously to find out the predominant aerosol that should be present in and outside the burn pan for a pool fire of liquid sodium. The conditions of occurrence of various sodium oxides under two different fire conditions namely pool and jet fires have been worked out. It is established that heterogeneous reactions involving sodium oxide are responsible for the formation of sodium dioxide and sodium hydroxide. It is necessary to take account of the rates of these heterogeneous reactions as well as the equivalence ratio-dependent decomposition calculations to correctly estimate the aerosol product mix in practical situations. © 2008 Elsevier B.V. All rights reserved.
About the journal
JournalNuclear Engineering and Design
ISSN00295493
Open AccessNo
Concepts (23)
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    Aerosols
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    Air pollution
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    Atmospheric aerosols
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    Breeder reactors
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    Combustion
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    Fast reactors
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    Flame spraying
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    LIQUID METAL COOLED REACTORS
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    Liquid metals
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    Metals
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    Nuclear reactors
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    Smoke
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    Thermoanalysis
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    Thermochemistry
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    Aerosol formation
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    AIR SYSTEMS
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    Equivalence ratios
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    FLAME TEMPERATURES
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    LIQUID METAL COOLED FAST BREEDER REACTORS
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    LIQUID SODIUM
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    SAFETY ASSESSMENTS
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    Thermodynamic analysis
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    Sodium