Redissolution and long-term transport of radionuclides released from a contaminated sediment: a numerical modelling study

A numerical model based upon residual circulation has been developed to simulate the long-term (years) transport of non-conservative radionuclides in the English Channel. The transfer of radionuclides between water, suspended matter and bottom sediments has been described in terms of kinetic transfe...

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Autor: Periáñez Rodríguez, Raúl
Tipo de recurso: artículo
Estado:Versión enviada para evaluación y publicación
Fecha de publicación:2003
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/133932
Acceso en línea:https://hdl.handle.net/11441/133932
https://doi.org/10.1016/S0272-7714(02)00115-4
Access Level:acceso abierto
Palabra clave:English Channel
Advection–diffusion
Distribution coefficient
Sediment
Suspended matter
Cs
Pu
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spelling Redissolution and long-term transport of radionuclides released from a contaminated sediment: a numerical modelling studyPeriáñez Rodríguez, RaúlEnglish ChannelAdvection–diffusionDistribution coefficientSedimentSuspended matterCsPuA numerical model based upon residual circulation has been developed to simulate the long-term (years) transport of non-conservative radionuclides in the English Channel. The transfer of radionuclides between water, suspended matter and bottom sediments has been described in terms of kinetic transfer coefficients, so that the model can be applied in situations out of equilibrium. The model has been used to study and compare the effects of direct discharges of radionuclides, the case of a continuous release and the redissolution of radionuclides from a contaminated sediment. These numerical experiments have been carried out for two radionuclides with a different geochemical behaviour: 137Cs and 239,240Pu. It has been found that natural equilibrium in the partition of radionuclides between the liquid and solid phases is reached in the case of instantaneous releases and in the case of redissolution from a contaminated sediment. However, in the case of a continuous release such partition remains out of natural equilibrium. Also, the behaviour of 137Cs and 239,240Pu is similar, but the time scales of the processes are clearly different due to the different affinities of both radionuclides to remain fixed to the solid phases.European Commission FIGE-CT-2000-00085ElsevierFísica Aplicada IRNM138: Física Nuclear AplicadaEuropean Commission (EC)2003info:eu-repo/semantics/articleinfo:eu-repo/semantics/submittedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/133932https://doi.org/10.1016/S0272-7714(02)00115-4reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésEstuarine, Coastal and Shelf Science, 56 (1), 5-14.FIGE-CT-2000-00085https://www.sciencedirect.com/science/article/pii/S0272771402001154?via%3Dihubinfo:eu-repo/semantics/openAccessoai:idus.us.es:11441/1339322026-06-17T12:51:07Z
dc.title.none.fl_str_mv Redissolution and long-term transport of radionuclides released from a contaminated sediment: a numerical modelling study
title Redissolution and long-term transport of radionuclides released from a contaminated sediment: a numerical modelling study
spellingShingle Redissolution and long-term transport of radionuclides released from a contaminated sediment: a numerical modelling study
Periáñez Rodríguez, Raúl
English Channel
Advection–diffusion
Distribution coefficient
Sediment
Suspended matter
Cs
Pu
title_short Redissolution and long-term transport of radionuclides released from a contaminated sediment: a numerical modelling study
title_full Redissolution and long-term transport of radionuclides released from a contaminated sediment: a numerical modelling study
title_fullStr Redissolution and long-term transport of radionuclides released from a contaminated sediment: a numerical modelling study
title_full_unstemmed Redissolution and long-term transport of radionuclides released from a contaminated sediment: a numerical modelling study
title_sort Redissolution and long-term transport of radionuclides released from a contaminated sediment: a numerical modelling study
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 Commission (EC)
dc.subject.none.fl_str_mv English Channel
Advection–diffusion
Distribution coefficient
Sediment
Suspended matter
Cs
Pu
topic English Channel
Advection–diffusion
Distribution coefficient
Sediment
Suspended matter
Cs
Pu
description A numerical model based upon residual circulation has been developed to simulate the long-term (years) transport of non-conservative radionuclides in the English Channel. The transfer of radionuclides between water, suspended matter and bottom sediments has been described in terms of kinetic transfer coefficients, so that the model can be applied in situations out of equilibrium. The model has been used to study and compare the effects of direct discharges of radionuclides, the case of a continuous release and the redissolution of radionuclides from a contaminated sediment. These numerical experiments have been carried out for two radionuclides with a different geochemical behaviour: 137Cs and 239,240Pu. It has been found that natural equilibrium in the partition of radionuclides between the liquid and solid phases is reached in the case of instantaneous releases and in the case of redissolution from a contaminated sediment. However, in the case of a continuous release such partition remains out of natural equilibrium. Also, the behaviour of 137Cs and 239,240Pu is similar, but the time scales of the processes are clearly different due to the different affinities of both radionuclides to remain fixed to the solid phases.
publishDate 2003
dc.date.none.fl_str_mv 2003
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/11441/133932
https://doi.org/10.1016/S0272-7714(02)00115-4
url https://hdl.handle.net/11441/133932
https://doi.org/10.1016/S0272-7714(02)00115-4
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Estuarine, Coastal and Shelf Science, 56 (1), 5-14.
FIGE-CT-2000-00085
https://www.sciencedirect.com/science/article/pii/S0272771402001154?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 15.300724

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