Numerical and experimental characterization of the reaction rates in the core of the CNESTEN’s TRIGA Mark II research reactor

Education, training and isotopes production are the most important uses of the Moroccan 2 MW TRIGA Mark II reactor situated at the National Center for Energy Sciences and Nuclear Techniques (CNESTEN, Morocco). To develop new R&D projects in research reactors, the particular and advanced knowledg...

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Autores principales:	Ghninou H., Gruel A., Lyoussi A., Reynard-Carette C., El Younoussi C., El Bakkari B., Nacir B., Boulaich Y., Bounouira H.
Formato:	article
Lenguaje:	EN
Publicado:	EDP Sciences 2021
Materias:	triga reactor neutron activation analysis tripoli-4 simulation γ spectrometry Physics QC1-999
Acceso en línea:	https://doaj.org/article/c954dfaae68d4934a652f7fa1dd7e479
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spelling	oai:doaj.org-article:c954dfaae68d4934a652f7fa1dd7e4792021-12-02T17:12:45ZNumerical and experimental characterization of the reaction rates in the core of the CNESTEN’s TRIGA Mark II research reactor2100-014X10.1051/epjconf/202125304006https://doaj.org/article/c954dfaae68d4934a652f7fa1dd7e4792021-01-01T00:00:00Zhttps://www.epj-conferences.org/articles/epjconf/pdf/2021/07/epjconf_animma2021_04006.pdfhttps://doaj.org/toc/2100-014XEducation, training and isotopes production are the most important uses of the Moroccan 2 MW TRIGA Mark II reactor situated at the National Center for Energy Sciences and Nuclear Techniques (CNESTEN, Morocco). To develop new R&D projects in research reactors, the particular and advanced knowledge of neutron and photon flux distribution, within and around the reactor core, is crucial. In order to precisely preparing the experiments in the CNESTEN’s TRIGA reactor, a detailed model was developed using the 3D continuous energy Monte Carlo code TRIPOLI-4 and the continuous energy cross-section data from the JEFF3.1.1 nuclear data library. This new model was used to carry out preliminary neutron and photon calculations to estimate flux levels in the irradiation channels as well as to calculate kinetic parameters of the reactor, core excess reactivity, integral control rods worth and power peaking factors. As a first step of the validation of the model, the obtained results were compared with the experimental ones available in the Final Safety Analysis Report (FSAR) of the TRIGA reactor. A study is being carried out at the end of which the results will be published as an evaluated benchmark. Furthermore, this work aims at experimentally characterize the reaction rates in various irradiation channels inside and outside the reactor core. The measurements are carried out using the neutron activation technique. To set up the experimental design for the activation experiments a series of preliminary calculations were performed using the TRIPOLI-4 model to calculate the expected gamma flux/intensity levels of various materials after irradiations in different positions in the irradiation facilities. Different activation foils with known characteristics are then irradiated and the activity of several isotopes is measured with the Gamma Spectrometry Method. The measured relative reaction rates are then compared with the calculated ones evaluated through the new TRIPOLI-4 reactor model. Fairly good agreement was found, which indicates that the new computational model is accurate enough to reproduce experiments.Ghninou H.Gruel A.Lyoussi A.Reynard-Carette C.El Younoussi C.El Bakkari B.Nacir B.Boulaich Y.Bounouira H.EDP Sciencesarticletriga reactorneutron activation analysistripoli-4 simulationγ spectrometryPhysicsQC1-999ENEPJ Web of Conferences, Vol 253, p 04006 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	triga reactor neutron activation analysis tripoli-4 simulation γ spectrometry Physics QC1-999
spellingShingle	triga reactor neutron activation analysis tripoli-4 simulation γ spectrometry Physics QC1-999 Ghninou H. Gruel A. Lyoussi A. Reynard-Carette C. El Younoussi C. El Bakkari B. Nacir B. Boulaich Y. Bounouira H. Numerical and experimental characterization of the reaction rates in the core of the CNESTEN’s TRIGA Mark II research reactor
description	Education, training and isotopes production are the most important uses of the Moroccan 2 MW TRIGA Mark II reactor situated at the National Center for Energy Sciences and Nuclear Techniques (CNESTEN, Morocco). To develop new R&D projects in research reactors, the particular and advanced knowledge of neutron and photon flux distribution, within and around the reactor core, is crucial. In order to precisely preparing the experiments in the CNESTEN’s TRIGA reactor, a detailed model was developed using the 3D continuous energy Monte Carlo code TRIPOLI-4 and the continuous energy cross-section data from the JEFF3.1.1 nuclear data library. This new model was used to carry out preliminary neutron and photon calculations to estimate flux levels in the irradiation channels as well as to calculate kinetic parameters of the reactor, core excess reactivity, integral control rods worth and power peaking factors. As a first step of the validation of the model, the obtained results were compared with the experimental ones available in the Final Safety Analysis Report (FSAR) of the TRIGA reactor. A study is being carried out at the end of which the results will be published as an evaluated benchmark. Furthermore, this work aims at experimentally characterize the reaction rates in various irradiation channels inside and outside the reactor core. The measurements are carried out using the neutron activation technique. To set up the experimental design for the activation experiments a series of preliminary calculations were performed using the TRIPOLI-4 model to calculate the expected gamma flux/intensity levels of various materials after irradiations in different positions in the irradiation facilities. Different activation foils with known characteristics are then irradiated and the activity of several isotopes is measured with the Gamma Spectrometry Method. The measured relative reaction rates are then compared with the calculated ones evaluated through the new TRIPOLI-4 reactor model. Fairly good agreement was found, which indicates that the new computational model is accurate enough to reproduce experiments.
format	article
author	Ghninou H. Gruel A. Lyoussi A. Reynard-Carette C. El Younoussi C. El Bakkari B. Nacir B. Boulaich Y. Bounouira H.
author_facet	Ghninou H. Gruel A. Lyoussi A. Reynard-Carette C. El Younoussi C. El Bakkari B. Nacir B. Boulaich Y. Bounouira H.
author_sort	Ghninou H.
title	Numerical and experimental characterization of the reaction rates in the core of the CNESTEN’s TRIGA Mark II research reactor
title_short	Numerical and experimental characterization of the reaction rates in the core of the CNESTEN’s TRIGA Mark II research reactor
title_full	Numerical and experimental characterization of the reaction rates in the core of the CNESTEN’s TRIGA Mark II research reactor
title_fullStr	Numerical and experimental characterization of the reaction rates in the core of the CNESTEN’s TRIGA Mark II research reactor
title_full_unstemmed	Numerical and experimental characterization of the reaction rates in the core of the CNESTEN’s TRIGA Mark II research reactor
title_sort	numerical and experimental characterization of the reaction rates in the core of the cnesten’s triga mark ii research reactor
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/c954dfaae68d4934a652f7fa1dd7e479
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Numerical and experimental characterization of the reaction rates in the core of the CNESTEN’s TRIGA Mark II research reactor

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