Modeling Film Boiling and Quenching: Modeling Film Boiling and Quenching on the Outer Surface of a Calandria Tube Following a Critical Break LOCA in a CANDU

 
9783846598504: Modeling Film Boiling and Quenching: Modeling Film Boiling and Quenching on the Outer Surface of a Calandria Tube Following a Critical Break LOCA in a CANDU
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In a postulated critical break LOCA in a CANDU reactor it is possible that heatup of a pressure tube (PT) causes ballooning contact with the calandria tube (CT). Stored heat can cause dryout of the CT and establishment of pool film boiling on the outer surface. The safety concern is that if the temperature of CT experiencing film boiling gets sufficiently high then failure of the fuel channel may occur. However, quench can limit the extent and duration of film boiling as has been experimentally observed. Current estimates of quench temperatures during pool film boiling are based primarily on experimental correlations. In this dissertation a novel mechanistic model of pool film boiling on the outside of CT has been developed. The model is based in part upon characterizing the vapor film thickness under buoyancy driven natural convection flows around a tube located horizontally in a large liquid pool. A transient equation is developed which quantifies the vapor film thickness and other governing parameters. This mechanistic model can be employed in safety analysis to demarcate the conditions under which fuel channel failure will not occur in a postulated critical break LOCA.

Biografía del autor:

Mr. Jian Tao Jiang: M.A.Sc, PMP. Worked for AMEC NSS as a safety analyst in Thermal-hydraulic Department from 2007 to 2009. Currently working at Simulator Support Section in Bruce Power.Dr. John C. Luxat: Professor at McMaster University, NSERC/UNENE Industrial Research Chair in Nuclear Safety Analysis, and Board of Directors of AECL.

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Jiang, Jian Tao / Luxat, John C.
ISBN 10: 384659850X ISBN 13: 9783846598504
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Descripción Condición: New. Publisher/Verlag: LAP Lambert Academic Publishing | Modeling Film Boiling and Quenching on the Outer Surface of a Calandria Tube Following a Critical Break LOCA in a CANDU | In a postulated critical break LOCA in a CANDU reactor it is possible that heatup of a pressure tube (PT) causes ballooning contact with the calandria tube (CT). Stored heat can cause dryout of the CT and establishment of pool film boiling on the outer surface. The safety concern is that if the temperature of CT experiencing film boiling gets sufficiently high then failure of the fuel channel may occur. However, quench can limit the extent and duration of film boiling as has been experimentally observed. Current estimates of quench temperatures during pool film boiling are based primarily on experimental correlations. In this dissertation a novel mechanistic model of pool film boiling on the outside of CT has been developed. The model is based in part upon characterizing the vapor film thickness under buoyancy driven natural convection flows around a tube located horizontally in a large liquid pool. A transient equation is developed which quantifies the vapor film thickness and other governing parameters. This mechanistic model can be employed in safety analysis to demarcate the conditions under which fuel channel failure will not occur in a postulated critical break LOCA. | Format: Paperback | Language/Sprache: english | 116 pp. Nº de ref. del artículo: K9783846598504

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Jian Tao Jiang
Publicado por LAP Lambert Academic Publishing Nov 2011 (2011)
ISBN 10: 384659850X ISBN 13: 9783846598504
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Descripción LAP Lambert Academic Publishing Nov 2011, 2011. Taschenbuch. Condición: Neu. Neuware - In a postulated critical break LOCA in a CANDU reactor it is possible that heatup of a pressure tube (PT) causes ballooning contact with the calandria tube (CT). Stored heat can cause dryout of the CT and establishment of pool film boiling on the outer surface. The safety concern is that if the temperature of CT experiencing film boiling gets sufficiently high then failure of the fuel channel may occur. However, quench can limit the extent and duration of film boiling as has been experimentally observed. Current estimates of quench temperatures during pool film boiling are based primarily on experimental correlations. In this dissertation a novel mechanistic model of pool film boiling on the outside of CT has been developed. The model is based in part upon characterizing the vapor film thickness under buoyancy driven natural convection flows around a tube located horizontally in a large liquid pool. A transient equation is developed which quantifies the vapor film thickness and other governing parameters. This mechanistic model can be employed in safety analysis to demarcate the conditions under which fuel channel failure will not occur in a postulated critical break LOCA. 116 pp. Englisch. Nº de ref. del artículo: 9783846598504

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Jian Tao Jiang
Publicado por LAP Lambert Academic Publishing Nov 2011 (2011)
ISBN 10: 384659850X ISBN 13: 9783846598504
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Descripción LAP Lambert Academic Publishing Nov 2011, 2011. Taschenbuch. Condición: Neu. Neuware - In a postulated critical break LOCA in a CANDU reactor it is possible that heatup of a pressure tube (PT) causes ballooning contact with the calandria tube (CT). Stored heat can cause dryout of the CT and establishment of pool film boiling on the outer surface. The safety concern is that if the temperature of CT experiencing film boiling gets sufficiently high then failure of the fuel channel may occur. However, quench can limit the extent and duration of film boiling as has been experimentally observed. Current estimates of quench temperatures during pool film boiling are based primarily on experimental correlations. In this dissertation a novel mechanistic model of pool film boiling on the outside of CT has been developed. The model is based in part upon characterizing the vapor film thickness under buoyancy driven natural convection flows around a tube located horizontally in a large liquid pool. A transient equation is developed which quantifies the vapor film thickness and other governing parameters. This mechanistic model can be employed in safety analysis to demarcate the conditions under which fuel channel failure will not occur in a postulated critical break LOCA. 116 pp. Englisch. Nº de ref. del artículo: 9783846598504

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Jian Tao Jiang, John C. Luxat
Publicado por LAP Lambert Academic Publishing (2011)
ISBN 10: 384659850X ISBN 13: 9783846598504
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Descripción LAP Lambert Academic Publishing, 2011. Paperback. Condición: New. Aufl.. Language: English . Brand New Book. In a postulated critical break LOCA in a CANDU reactor it is possible that heatup of a pressure tube (PT) causes ballooning contact with the calandria tube (CT). Stored heat can cause dryout of the CT and establishment of pool film boiling on the outer surface. The safety concern is that if the temperature of CT experiencing film boiling gets sufficiently high then failure of the fuel channel may occur. However, quench can limit the extent and duration of film boiling as has been experimentally observed. Current estimates of quench temperatures during pool film boiling are based primarily on experimental correlations. In this dissertation a novel mechanistic model of pool film boiling on the outside of CT has been developed. The model is based in part upon characterizing the vapor film thickness under buoyancy driven natural convection flows around a tube located horizontally in a large liquid pool. A transient equation is developed which quantifies the vapor film thickness and other governing parameters. This mechanistic model can be employed in safety analysis to demarcate the conditions under which fuel channel failure will not occur in a postulated critical break LOCA. Nº de ref. del artículo: KNV9783846598504

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Jian Tao Jiang
Publicado por LAP Lambert Academic Publishing Nov 2011 (2011)
ISBN 10: 384659850X ISBN 13: 9783846598504
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Descripción LAP Lambert Academic Publishing Nov 2011, 2011. Taschenbuch. Condición: Neu. This item is printed on demand - Print on Demand Neuware - In a postulated critical break LOCA in a CANDU reactor it is possible that heatup of a pressure tube (PT) causes ballooning contact with the calandria tube (CT). Stored heat can cause dryout of the CT and establishment of pool film boiling on the outer surface. The safety concern is that if the temperature of CT experiencing film boiling gets sufficiently high then failure of the fuel channel may occur. However, quench can limit the extent and duration of film boiling as has been experimentally observed. Current estimates of quench temperatures during pool film boiling are based primarily on experimental correlations. In this dissertation a novel mechanistic model of pool film boiling on the outside of CT has been developed. The model is based in part upon characterizing the vapor film thickness under buoyancy driven natural convection flows around a tube located horizontally in a large liquid pool. A transient equation is developed which quantifies the vapor film thickness and other governing parameters. This mechanistic model can be employed in safety analysis to demarcate the conditions under which fuel channel failure will not occur in a postulated critical break LOCA. 116 pp. Englisch. Nº de ref. del artículo: 9783846598504

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