Modeling and numerical simulation of the atmospheric dispersion of continuous and accidental releases around a nuclear installation / Amel Dada

Public ISBD Titre : Modeling and numerical simulation of the atmospheric dispersion of continuous and accidental releases around a nuclear installation Titre original : Modélisation et simulation numérique de la dispersion atmosphérique continue et accidentelle autour d'un site d’une installation nucléaire Type de document : document multimédia Auteurs : Amel Dada, Auteur ; Belkacem Bouali, Directeur de thèse ; Abdallah Bouam, Directeur de thèse Editeur : Laghouat : Université Amar Telidji - Département de génie mécanique Année de publication : 2025 Importance : 139 p Accompagnement : 1 disque optique numérique (CD-ROM) Note générale : Option : Energetic Langues : Anglais Catégories : THESES :07 génie mecanique Mots-clés : Electricity production  Nuclear reactor  Hypothetical Accident  Atmospheric dispersion  Source term  ORIGEN-JR code  TED  HOTSPOT code Résumé : Nuclear energy is one of the sources of electricity generation that many countries rely on, due to its large production capacity, stable costs and lack of carbon emissions. Nuclear energy relies on the fission of uranium or plutonium atoms, which releases significant heat. This heat transforms water into steam, which turns a turbine coupled to an alternator, generating electricity. However, in the event of a nuclear accident, its risks to the environment and to humans cannot be neglected. In this context, we have proposed a study that would help us address concerns about the level of pollution resulting from a hypothetical severe nuclear accident. In addition, to identifying the pathways of these levels of contamination, which affect the environment in general, and public health in particular. This study will also help identify the pathways of contamination spread, impacting the environment in general and public health in particular. Our work involves the analysis and evaluation of the source term using the ORIGEN-JR code, as well as the study of the radiological impact of radionuclides on the environment and the public using the HOTSPOT code. We studied two nuclear reactor sites: the AP1000 nuclear power plant located in the southern part of Weihai, China, and the TRIGA Mark-II research reactor located in Janakbari, Savar Upazila, Bangladesh, in the central region of the country. The results of this study reveal that in the event of an accident at the AP1000 plant, the estimated doses for all groups of radionuclides exceed the annual regulatory limits established by the IAEA (1 mSv/year for public exposure and 20 mSv/year for workers). These levels of contamination would cause significant damage, requiring immediate intervention to protect workers and the population. In contrast, in the case of the TRIGA Mark-II research reactor, the accident showed no impact on the environment and the population. note de thèses : Thèse de doctorat en génie mécanique Modeling and numerical simulation of the atmospheric dispersion of continuous and accidental releases around a nuclear installation = Modélisation et simulation numérique de la dispersion atmosphérique continue et accidentelle autour d'un site d’une installation nucléaire [document multimédia] / Amel Dada, Auteur ; Belkacem Bouali, Directeur de thèse ; Abdallah Bouam, Directeur de thèse . - Laghouat : Université Amar Telidji - Département de génie mécanique, 2025 . - 139 p + 1 disque optique numérique (CD-ROM). Option : Energetic Langues : Anglais Catégories : THESES :07 génie mecanique Mots-clés : Electricity production  Nuclear reactor  Hypothetical Accident  Atmospheric dispersion  Source term  ORIGEN-JR code  TED  HOTSPOT code Résumé : Nuclear energy is one of the sources of electricity generation that many countries rely on, due to its large production capacity, stable costs and lack of carbon emissions. Nuclear energy relies on the fission of uranium or plutonium atoms, which releases significant heat. This heat transforms water into steam, which turns a turbine coupled to an alternator, generating electricity. However, in the event of a nuclear accident, its risks to the environment and to humans cannot be neglected. In this context, we have proposed a study that would help us address concerns about the level of pollution resulting from a hypothetical severe nuclear accident. In addition, to identifying the pathways of these levels of contamination, which affect the environment in general, and public health in particular. This study will also help identify the pathways of contamination spread, impacting the environment in general and public health in particular. Our work involves the analysis and evaluation of the source term using the ORIGEN-JR code, as well as the study of the radiological impact of radionuclides on the environment and the public using the HOTSPOT code. We studied two nuclear reactor sites: the AP1000 nuclear power plant located in the southern part of Weihai, China, and the TRIGA Mark-II research reactor located in Janakbari, Savar Upazila, Bangladesh, in the central region of the country. The results of this study reveal that in the event of an accident at the AP1000 plant, the estimated doses for all groups of radionuclides exceed the annual regulatory limits established by the IAEA (1 mSv/year for public exposure and 20 mSv/year for workers). These levels of contamination would cause significant damage, requiring immediate intervention to protect workers and the population. In contrast, in the case of the TRIGA Mark-II research reactor, the accident showed no impact on the environment and the population. note de thèses : Thèse de doctorat en génie mécanique

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