Testing the behaviour of different kinetic models for uptake/release of radionuclides between water and sediments when implemented in a marine dispersion model

Three kinetic models for adsorption/release of 137Cs between water and sediments have been tested when they are included in a previously validated dispersion model of the English Channel. Radionuclides are released to the Channel from La Hague nuclear fuel reprocessing plant (France). The kinetic mo...

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Autor: Periáñez Rodríguez, Raúl
Tipo de recurso: artículo
Estado:Versión enviada para evaluación y publicación
Fecha de publicación:2004
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/133964
Acceso en línea:https://hdl.handle.net/11441/133964
https://doi.org/10.1016/S0265-931X(03)00172-3
Access Level:acceso abierto
Palabra clave:Kinetic models
Dispersion model
Adsorption
Sediment phase
Caesium
English Channel
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spelling Testing the behaviour of different kinetic models for uptake/release of radionuclides between water and sediments when implemented in a marine dispersion modelPeriáñez Rodríguez, RaúlKinetic modelsDispersion modelAdsorptionSediment phaseCaesiumEnglish ChannelThree kinetic models for adsorption/release of 137Cs between water and sediments have been tested when they are included in a previously validated dispersion model of the English Channel. Radionuclides are released to the Channel from La Hague nuclear fuel reprocessing plant (France). The kinetic models are a 1-step model consisting of a single reversible reaction, a 2-step model consisting of two consecutive reversible reactions and an irreversible model consisting of three parallel reactions: two reversible and one irreversible. The models have been tested under three typical situations that correspond to the source terms that can generally be found: instantaneous release, continuous release and redissolution of radionuclides from contaminated sediments. Differences between the models become more evident when contact times between water and sediments are larger (continuous release) and in the case of redissolution from sediments. Time scales for the redissolution process are rather different between the three models. The 1-step model produces a redissolution that is too fast when compared with experimental evidence. The irreversible model requires that saturation effects of the irreversible phase are included. Probably, the 2-step model represents the best compromise between ease and level of detail of the description of sorption/release processes.European Union (EU) FIGE-CT-2000-00085ElsevierFísica Aplicada IRNM138: Física Nuclear AplicadaEuropean Union (UE)2004info:eu-repo/semantics/articleinfo:eu-repo/semantics/submittedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/133964https://doi.org/10.1016/S0265-931X(03)00172-3reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésJournal of Environmental Radioactivity, 71 (3), 243-259.FIGE-CT-2000-00085https://www.sciencedirect.com/science/article/pii/S0265931X03001723?via%3Dihubinfo:eu-repo/semantics/openAccessoai:idus.us.es:11441/1339642026-06-17T12:51:07Z
dc.title.none.fl_str_mv Testing the behaviour of different kinetic models for uptake/release of radionuclides between water and sediments when implemented in a marine dispersion model
title Testing the behaviour of different kinetic models for uptake/release of radionuclides between water and sediments when implemented in a marine dispersion model
spellingShingle Testing the behaviour of different kinetic models for uptake/release of radionuclides between water and sediments when implemented in a marine dispersion model
Periáñez Rodríguez, Raúl
Kinetic models
Dispersion model
Adsorption
Sediment phase
Caesium
English Channel
title_short Testing the behaviour of different kinetic models for uptake/release of radionuclides between water and sediments when implemented in a marine dispersion model
title_full Testing the behaviour of different kinetic models for uptake/release of radionuclides between water and sediments when implemented in a marine dispersion model
title_fullStr Testing the behaviour of different kinetic models for uptake/release of radionuclides between water and sediments when implemented in a marine dispersion model
title_full_unstemmed Testing the behaviour of different kinetic models for uptake/release of radionuclides between water and sediments when implemented in a marine dispersion model
title_sort Testing the behaviour of different kinetic models for uptake/release of radionuclides between water and sediments when implemented in a marine dispersion model
dc.creator.none.fl_str_mv Periáñez Rodríguez, Raúl
author Periáñez Rodríguez, Raúl
author_facet Periáñez Rodríguez, Raúl
author_role author
dc.contributor.none.fl_str_mv Física Aplicada I
RNM138: Física Nuclear Aplicada
European Union (UE)
dc.subject.none.fl_str_mv Kinetic models
Dispersion model
Adsorption
Sediment phase
Caesium
English Channel
topic Kinetic models
Dispersion model
Adsorption
Sediment phase
Caesium
English Channel
description Three kinetic models for adsorption/release of 137Cs between water and sediments have been tested when they are included in a previously validated dispersion model of the English Channel. Radionuclides are released to the Channel from La Hague nuclear fuel reprocessing plant (France). The kinetic models are a 1-step model consisting of a single reversible reaction, a 2-step model consisting of two consecutive reversible reactions and an irreversible model consisting of three parallel reactions: two reversible and one irreversible. The models have been tested under three typical situations that correspond to the source terms that can generally be found: instantaneous release, continuous release and redissolution of radionuclides from contaminated sediments. Differences between the models become more evident when contact times between water and sediments are larger (continuous release) and in the case of redissolution from sediments. Time scales for the redissolution process are rather different between the three models. The 1-step model produces a redissolution that is too fast when compared with experimental evidence. The irreversible model requires that saturation effects of the irreversible phase are included. Probably, the 2-step model represents the best compromise between ease and level of detail of the description of sorption/release processes.
publishDate 2004
dc.date.none.fl_str_mv 2004
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/submittedVersion
format article
status_str submittedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/133964
https://doi.org/10.1016/S0265-931X(03)00172-3
url https://hdl.handle.net/11441/133964
https://doi.org/10.1016/S0265-931X(03)00172-3
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Journal of Environmental Radioactivity, 71 (3), 243-259.
FIGE-CT-2000-00085
https://www.sciencedirect.com/science/article/pii/S0265931X03001723?via%3Dihub
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301603

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