Long Term Neutron Activation in JET DD Operation

In the 2019 C38 Deuterium-Deuterium campaign at JET several different ITER-relevant materials and dosimetry foils were irradiated in a specially designed long-term irradiation station located inside the vacuum vessel with the purpose of testing the activation of ITER materials by fusion neutrons. Th...

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Autores principales:	Žohar Andrej, Lengar Igor, Batistoni Paola, Conroy Sean, Čufar Aljaž, Kierepko Renata, Kos Bor, Loreti Stefano, Mietelski Jerzy W., Nobs Chantal R., Packer Lee W., Pillon Mario, Radulović Vladimir, Savva Marilia I., Snoj Luka, Stamatelatos Ion E., Štancar Žiga, Vasilopoulou Theodora, Wójcik-Gargula Anna
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	jet long term neutron irradiation mcnp Physics QC1-999
Acceso en línea:	https://doaj.org/article/c793af99fef744828baee5936fe8904a
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id	oai:doaj.org-article:c793af99fef744828baee5936fe8904a
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spelling	oai:doaj.org-article:c793af99fef744828baee5936fe8904a2021-12-02T17:12:45ZLong Term Neutron Activation in JET DD Operation2100-014X10.1051/epjconf/202125303005https://doaj.org/article/c793af99fef744828baee5936fe8904a2021-01-01T00:00:00Zhttps://www.epj-conferences.org/articles/epjconf/pdf/2021/07/epjconf_animma2021_03005.pdfhttps://doaj.org/toc/2100-014XIn the 2019 C38 Deuterium-Deuterium campaign at JET several different ITER-relevant materials and dosimetry foils were irradiated in a specially designed long-term irradiation station located inside the vacuum vessel with the purpose of testing the activation of ITER materials by fusion neutrons. The samples were exposed to a neutron fluence of 1.9E14 n/cm2 during JET discharges performed in the experimental campaign over a period of 5 months. Gamma ray spectroscopy measurements were performed on irradiated samples to determine the activation of different long-lived isotopes in the samples. Monte Carlo computational analysis was performed to support the experiment by using the measured neutron yield and irradiation time. In this paper we focus on the computational analysis of the dosimetry foils that are used in order to measure the local neutron energy spectrum and flux. The foils were chosen to cover different neutron energies: thus Yttrium and some of the Nickel and Cobalt reactions were used to determine the Deuterium-Tritium fusion fraction, while Scandium and Iron and some of the Nickel and Cobalt reactions were used for comparison of the computed activity with the experimental measurements. The obtained C/E values show a reasonably good agreement between calculated and measured activity, thus validating the computational methodology and providing the basis for the analysis of the ITER-relevant materials and future experiments performed at JET in the Deuterium-Tritium campaign.Žohar AndrejLengar IgorBatistoni PaolaConroy SeanČufar AljažKierepko RenataKos BorLoreti StefanoMietelski Jerzy W.Nobs Chantal R.Packer Lee W.Pillon MarioRadulović VladimirSavva Marilia I.Snoj LukaStamatelatos Ion E.Štancar ŽigaVasilopoulou TheodoraWójcik-Gargula AnnaEDP Sciencesarticlejetlong term neutron irradiationmcnpPhysicsQC1-999ENEPJ Web of Conferences, Vol 253, p 03005 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	jet long term neutron irradiation mcnp Physics QC1-999
spellingShingle	jet long term neutron irradiation mcnp Physics QC1-999 Žohar Andrej Lengar Igor Batistoni Paola Conroy Sean Čufar Aljaž Kierepko Renata Kos Bor Loreti Stefano Mietelski Jerzy W. Nobs Chantal R. Packer Lee W. Pillon Mario Radulović Vladimir Savva Marilia I. Snoj Luka Stamatelatos Ion E. Štancar Žiga Vasilopoulou Theodora Wójcik-Gargula Anna Long Term Neutron Activation in JET DD Operation
description	In the 2019 C38 Deuterium-Deuterium campaign at JET several different ITER-relevant materials and dosimetry foils were irradiated in a specially designed long-term irradiation station located inside the vacuum vessel with the purpose of testing the activation of ITER materials by fusion neutrons. The samples were exposed to a neutron fluence of 1.9E14 n/cm2 during JET discharges performed in the experimental campaign over a period of 5 months. Gamma ray spectroscopy measurements were performed on irradiated samples to determine the activation of different long-lived isotopes in the samples. Monte Carlo computational analysis was performed to support the experiment by using the measured neutron yield and irradiation time. In this paper we focus on the computational analysis of the dosimetry foils that are used in order to measure the local neutron energy spectrum and flux. The foils were chosen to cover different neutron energies: thus Yttrium and some of the Nickel and Cobalt reactions were used to determine the Deuterium-Tritium fusion fraction, while Scandium and Iron and some of the Nickel and Cobalt reactions were used for comparison of the computed activity with the experimental measurements. The obtained C/E values show a reasonably good agreement between calculated and measured activity, thus validating the computational methodology and providing the basis for the analysis of the ITER-relevant materials and future experiments performed at JET in the Deuterium-Tritium campaign.
format	article
author	Žohar Andrej Lengar Igor Batistoni Paola Conroy Sean Čufar Aljaž Kierepko Renata Kos Bor Loreti Stefano Mietelski Jerzy W. Nobs Chantal R. Packer Lee W. Pillon Mario Radulović Vladimir Savva Marilia I. Snoj Luka Stamatelatos Ion E. Štancar Žiga Vasilopoulou Theodora Wójcik-Gargula Anna
author_facet	Žohar Andrej Lengar Igor Batistoni Paola Conroy Sean Čufar Aljaž Kierepko Renata Kos Bor Loreti Stefano Mietelski Jerzy W. Nobs Chantal R. Packer Lee W. Pillon Mario Radulović Vladimir Savva Marilia I. Snoj Luka Stamatelatos Ion E. Štancar Žiga Vasilopoulou Theodora Wójcik-Gargula Anna
author_sort	Žohar Andrej
title	Long Term Neutron Activation in JET DD Operation
title_short	Long Term Neutron Activation in JET DD Operation
title_full	Long Term Neutron Activation in JET DD Operation
title_fullStr	Long Term Neutron Activation in JET DD Operation
title_full_unstemmed	Long Term Neutron Activation in JET DD Operation
title_sort	long term neutron activation in jet dd operation
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/c793af99fef744828baee5936fe8904a
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Long Term Neutron Activation in JET DD Operation

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