On the use of a dedicated ballast pellet for a prompt self-ejection mechanism after a temperature transient in lead-cooled fast reactors

The potential use of changes in buoyancy as a reactivity feedback mechanism during temperature transients in heavy liquid metal fast reactors (HLMFRs) is discussed. It is shown that with the use of ballast pellets (~15% volume fraction) introduced in combination with fuel pellets, fuel rods will be...

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Autor: Arias Montenegro, Francisco Javier|||0000-0002-0779-9754
Tipo de recurso: artículo
Fecha de publicación:2017
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/107743
Acceso en línea:https://hdl.handle.net/2117/107743
https://dx.doi.org/10.1016/j.nucengdes.2017.07.023
Access Level:acceso abierto
Palabra clave:Fluid dynamics
Nuclear reactors
Heavy liquid metal fast reactors
Buoyancy
Temperature transient compensation
Generation IV reactors
Dinàmica de fluids
Reactors nuclears
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
Àrees temàtiques de la UPC::Energies::Energia nuclear
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spelling On the use of a dedicated ballast pellet for a prompt self-ejection mechanism after a temperature transient in lead-cooled fast reactorsArias Montenegro, Francisco Javier|||0000-0002-0779-9754Fluid dynamicsNuclear reactorsHeavy liquid metal fast reactorsBuoyancyTemperature transient compensationGeneration IV reactorsDinàmica de fluidsReactors nuclearsÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluidsÀrees temàtiques de la UPC::Energies::Energia nuclearThe potential use of changes in buoyancy as a reactivity feedback mechanism during temperature transients in heavy liquid metal fast reactors (HLMFRs) is discussed. It is shown that with the use of ballast pellets (~15% volume fraction) introduced in combination with fuel pellets, fuel rods will be endowed with a reliable self-ejection mechanism that is able to compensate temperature transients. Utilizing a simplified model, an estimate of the negative reactivity insertion expected from this mechanism is derived. The use of ballast pellets opens up the possibility of introducing greater amounts of actinides into the core, as well as providing a solution to the classical problem of positive coolant temperature reactivity coefficients in fast reactors.Peer Reviewed20172017-10-0120172017-09-18journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/107743https://dx.doi.org/10.1016/j.nucengdes.2017.07.023reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/1077432026-05-27T15:37:01Z
dc.title.none.fl_str_mv On the use of a dedicated ballast pellet for a prompt self-ejection mechanism after a temperature transient in lead-cooled fast reactors
title On the use of a dedicated ballast pellet for a prompt self-ejection mechanism after a temperature transient in lead-cooled fast reactors
spellingShingle On the use of a dedicated ballast pellet for a prompt self-ejection mechanism after a temperature transient in lead-cooled fast reactors
Arias Montenegro, Francisco Javier|||0000-0002-0779-9754
Fluid dynamics
Nuclear reactors
Heavy liquid metal fast reactors
Buoyancy
Temperature transient compensation
Generation IV reactors
Dinàmica de fluids
Reactors nuclears
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
Àrees temàtiques de la UPC::Energies::Energia nuclear
title_short On the use of a dedicated ballast pellet for a prompt self-ejection mechanism after a temperature transient in lead-cooled fast reactors
title_full On the use of a dedicated ballast pellet for a prompt self-ejection mechanism after a temperature transient in lead-cooled fast reactors
title_fullStr On the use of a dedicated ballast pellet for a prompt self-ejection mechanism after a temperature transient in lead-cooled fast reactors
title_full_unstemmed On the use of a dedicated ballast pellet for a prompt self-ejection mechanism after a temperature transient in lead-cooled fast reactors
title_sort On the use of a dedicated ballast pellet for a prompt self-ejection mechanism after a temperature transient in lead-cooled fast reactors
dc.creator.none.fl_str_mv Arias Montenegro, Francisco Javier|||0000-0002-0779-9754
author Arias Montenegro, Francisco Javier|||0000-0002-0779-9754
author_facet Arias Montenegro, Francisco Javier|||0000-0002-0779-9754
author_role author
dc.subject.none.fl_str_mv Fluid dynamics
Nuclear reactors
Heavy liquid metal fast reactors
Buoyancy
Temperature transient compensation
Generation IV reactors
Dinàmica de fluids
Reactors nuclears
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
Àrees temàtiques de la UPC::Energies::Energia nuclear
topic Fluid dynamics
Nuclear reactors
Heavy liquid metal fast reactors
Buoyancy
Temperature transient compensation
Generation IV reactors
Dinàmica de fluids
Reactors nuclears
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
Àrees temàtiques de la UPC::Energies::Energia nuclear
description The potential use of changes in buoyancy as a reactivity feedback mechanism during temperature transients in heavy liquid metal fast reactors (HLMFRs) is discussed. It is shown that with the use of ballast pellets (~15% volume fraction) introduced in combination with fuel pellets, fuel rods will be endowed with a reliable self-ejection mechanism that is able to compensate temperature transients. Utilizing a simplified model, an estimate of the negative reactivity insertion expected from this mechanism is derived. The use of ballast pellets opens up the possibility of introducing greater amounts of actinides into the core, as well as providing a solution to the classical problem of positive coolant temperature reactivity coefficients in fast reactors.
publishDate 2017
dc.date.none.fl_str_mv 2017
2017-10-01
2017
2017-09-18
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/107743
https://dx.doi.org/10.1016/j.nucengdes.2017.07.023
url https://hdl.handle.net/2117/107743
https://dx.doi.org/10.1016/j.nucengdes.2017.07.023
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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