Beam-facing material selection for mitigation of residual doses in the HEBT of IFMIF-DONES

IFMIF-DONES will be an irradiation facility based on a 40 MeV deuteron accelerator. Unavoidable beam losses along the accelerator result in deuterium interactions with the beam facing materials of the vacuum beam pipe, some of them leading to material activation. The initial design of the beam pipe...

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Authors: Ogando Serrano, Francisco M., Macià, Llorenç, López Ochoa, Víctor, Podadera Aliseda, Ivan, Sánchez Herranz, Daniel
Format: article
Publication Date:2024
Country:España
Institution:Universidad Nacional de Educación a Distancia
Repository:e-spacio. Repositorio Institucional de la UNED
Language:English
OAI Identifier:oai:e-spacio.uned.es:20.500.14468/25953
Online Access:https://hdl.handle.net/20.500.14468/25953
Access Level:Open access
Keyword:33 Ciencias Tecnológicas
IFMIF-DONES
particle accelerator
beam facing material
aluminum
radiation mitigation
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spelling Beam-facing material selection for mitigation of residual doses in the HEBT of IFMIF-DONESOgando Serrano, Francisco M.Macià, LlorençLópez Ochoa, VíctorPodadera Aliseda, IvanSánchez Herranz, Daniel33 Ciencias TecnológicasIFMIF-DONESparticle acceleratorbeam facing materialaluminumradiation mitigationIFMIF-DONES will be an irradiation facility based on a 40 MeV deuteron accelerator. Unavoidable beam losses along the accelerator result in deuterium interactions with the beam facing materials of the vacuum beam pipe, some of them leading to material activation. The initial design of the beam pipe was based on stainless steel, but an evaluation of the residual doses from the pipe showed high values after operation of the accelerator. The accelerator beam line must be periodically maintained, and excessive cooling times for reaching acceptable dose levels may result in poorer availability of the facility. A deeper study of the High Energy Beam Transport line (HEBT) showed that a direct reaction between deuterons and iron in steel resulted in the production of Co-56, with a half-life of 77 days. This radioisotope is the main source of the radiation and makes it impractical to wait for a proper attenuation of the radiation field. A redesign of beam line elements has been performed to avoid the presence of stainless steel as a beam facing material and to replace it with aluminum where possible, resulting in faster decay of residual doses. This work contains a summary of the nuclear analysis performed for the computation of residual doses with stainless steel beam pipe, stressing the uncertainties of the calculations, based on the limited availability of nuclear data for the relevant nuclear reaction Fe56 (d,2n). The proposed replacement of element materials is also described, and an updated nuclear analysis shows the reduction of residual radiation, and its impact on possible maintenance operations.ELSEVIERhttps://orcid.org/0000-0001-5599-336Xhttps://orcid.org/0000-0002-3459-4631https://orcid.org/0000-0001-7090-2550e-Spacio UNED20252025-02-2120242024-01-0120242024-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14468/25953reponame:e-spacio. Repositorio Institucional de la UNEDinstname:Universidad Nacional de Educación a DistanciaInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/deed.esoai:e-spacio.uned.es:20.500.14468/259532026-06-06T12:38:31Z
dc.title.none.fl_str_mv Beam-facing material selection for mitigation of residual doses in the HEBT of IFMIF-DONES
title Beam-facing material selection for mitigation of residual doses in the HEBT of IFMIF-DONES
spellingShingle Beam-facing material selection for mitigation of residual doses in the HEBT of IFMIF-DONES
Ogando Serrano, Francisco M.
33 Ciencias Tecnológicas
IFMIF-DONES
particle accelerator
beam facing material
aluminum
radiation mitigation
title_short Beam-facing material selection for mitigation of residual doses in the HEBT of IFMIF-DONES
title_full Beam-facing material selection for mitigation of residual doses in the HEBT of IFMIF-DONES
title_fullStr Beam-facing material selection for mitigation of residual doses in the HEBT of IFMIF-DONES
title_full_unstemmed Beam-facing material selection for mitigation of residual doses in the HEBT of IFMIF-DONES
title_sort Beam-facing material selection for mitigation of residual doses in the HEBT of IFMIF-DONES
dc.creator.none.fl_str_mv Ogando Serrano, Francisco M.
Macià, Llorenç
López Ochoa, Víctor
Podadera Aliseda, Ivan
Sánchez Herranz, Daniel
author Ogando Serrano, Francisco M.
author_facet Ogando Serrano, Francisco M.
Macià, Llorenç
López Ochoa, Víctor
Podadera Aliseda, Ivan
Sánchez Herranz, Daniel
author_role author
author2 Macià, Llorenç
López Ochoa, Víctor
Podadera Aliseda, Ivan
Sánchez Herranz, Daniel
author2_role author
author
author
author
dc.contributor.none.fl_str_mv https://orcid.org/0000-0001-5599-336X
https://orcid.org/0000-0002-3459-4631
https://orcid.org/0000-0001-7090-2550
e-Spacio UNED
dc.subject.none.fl_str_mv 33 Ciencias Tecnológicas
IFMIF-DONES
particle accelerator
beam facing material
aluminum
radiation mitigation
topic 33 Ciencias Tecnológicas
IFMIF-DONES
particle accelerator
beam facing material
aluminum
radiation mitigation
description IFMIF-DONES will be an irradiation facility based on a 40 MeV deuteron accelerator. Unavoidable beam losses along the accelerator result in deuterium interactions with the beam facing materials of the vacuum beam pipe, some of them leading to material activation. The initial design of the beam pipe was based on stainless steel, but an evaluation of the residual doses from the pipe showed high values after operation of the accelerator. The accelerator beam line must be periodically maintained, and excessive cooling times for reaching acceptable dose levels may result in poorer availability of the facility. A deeper study of the High Energy Beam Transport line (HEBT) showed that a direct reaction between deuterons and iron in steel resulted in the production of Co-56, with a half-life of 77 days. This radioisotope is the main source of the radiation and makes it impractical to wait for a proper attenuation of the radiation field. A redesign of beam line elements has been performed to avoid the presence of stainless steel as a beam facing material and to replace it with aluminum where possible, resulting in faster decay of residual doses. This work contains a summary of the nuclear analysis performed for the computation of residual doses with stainless steel beam pipe, stressing the uncertainties of the calculations, based on the limited availability of nuclear data for the relevant nuclear reaction Fe56 (d,2n). The proposed replacement of element materials is also described, and an updated nuclear analysis shows the reduction of residual radiation, and its impact on possible maintenance operations.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024-01-01
2024
2024-01-01
2025
2025-02-21
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14468/25953
url https://hdl.handle.net/20.500.14468/25953
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
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/deed.es
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
http://creativecommons.org/licenses/by/4.0/deed.es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ELSEVIER
publisher.none.fl_str_mv ELSEVIER
dc.source.none.fl_str_mv reponame:e-spacio. Repositorio Institucional de la UNED
instname:Universidad Nacional de Educación a Distancia
instname_str Universidad Nacional de Educación a Distancia
reponame_str e-spacio. Repositorio Institucional de la UNED
collection e-spacio. Repositorio Institucional de la UNED
repository.name.fl_str_mv
repository.mail.fl_str_mv
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