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Les Mecanismes De Corrosion En Phase Aqueuse Du Verre Nucleaire R7t7 Approche Experimentale Essai De Modelisation Thermodynamique Et Cinetique
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Book Synopsis LES MECANISMES DE CORROSION EN PHASE AQUEUSE DU VERRE NUCLEAIRE R7T7 APPROCHE EXPERIMENTALE. ESSAI DE MODELISATION THERMODYNAMIQUE ET CINETIQUE by : Thierry Advocat
Download or read book LES MECANISMES DE CORROSION EN PHASE AQUEUSE DU VERRE NUCLEAIRE R7T7 APPROCHE EXPERIMENTALE. ESSAI DE MODELISATION THERMODYNAMIQUE ET CINETIQUE written by Thierry Advocat and published by . This book was released on 1991 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL EST UNE CONTRIBUTION A LA CONNAISSANCE DES MECANISMES ET DES VITESSES DE CORROSION EN PHASE AQUEUSE DU VERRE NUCLEAIRE R7T7. DES EXPERIENCES DE DISSOLUTION ONT ETE REALISEES DANS UNE LARGE GAMME DE PH ET DE RAPPORTS S/V (SURFACE DE VERRE/VOLUME DE SOLUTION). ON REND COMPTE DE DEUX MODES DE DISSOLUTION: EN MILIEU ACIDE, ON ASSISTE A UNE EXTRACTION PREFERENTIELLE DES ELEMENTS MODIFICATEURS DU VERRE; EN MILIEU BASIQUE, LA DISSOLUTION EST STCHIOMETRIQUE. ON OBSERVE EGALEMENT UNE AUGMENTATION DE LA VITESSE DE DISSOLUTION INITIALE DU VERRE LORSQUE LE PH AUGMENTE. LORSQUE LES RAPPORTS S/V SONT ELEVES, DES VITESSES DE DISSOLUTION FINALES ONT PU ETRE MESUREES. NOS EXPERIENCES INDIQUENT QUE LA SOLUTION TEND A S'EQUILIBRER AVEC LA SILICE DU VERRE. MAIS IL EXISTE TOUJOURS UNE AFFINITE DE DISSOLUTION NON NULLE. A 90C, LE TAUX DE DISSOLUTION DU VERRE R7T7, PROCHE ET LOIN DE L'EQUILIBRE, PEUT S'EXPRIMER PAR LA RELATION: V=1,2?10##1#4?(AH+)##0#,#3#9?(1-H4SI04/H4SI04#S#A#T). IL RESSORT EGALEMENT QUE LA VITESSE DE DISSOLUTION A LONG TERME EST SOUS LA DEPENDANCE DE NOMBREUX PARAMETRES EXTRINSEQUES. EN CE SENS, L'AFFINITE DE LA REACTION DE DISSOLUTION EST CONTEXTUELLE. DANS UNE DERNIERE PARTIE, LA DISSOLUTION DU VERRE A ETE SIMULEE GRACE AU CODE THERMOCINETIQUE KINDISS. LES CALCULS REPRODUISENT L'EXPERIENCE AVEC SATISFACTION
Book Synopsis Advances in Transport Phenomena by : Liqiu Wang
Download or read book Advances in Transport Phenomena written by Liqiu Wang and published by Springer Science & Business Media. This book was released on 2009-10-15 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: The term transport phenomena is used to describe processes in which mass, momentum, energy and entropy move about in matter. Advances in Transport Phenomena provide state-of-the-art expositions of major advances by theoretical, numerical and experimental studies from a molecular, microscopic, mesoscopic, macroscopic or megascopic point of view across the spectrum of transport p- nomena, from scientific enquiries to practical applications. The annual review series intends to fill the information gap between regularly published journals and university-level textbooks by providing in-depth review articles over a broader scope than in journals. The authoritative articles, contributed by international- leading scientists and practitioners, establish the state of the art, disseminate the latest research discoveries, serve as a central source of reference for fundamentals and applications of transport phenomena, and provide potential textbooks to senior undergraduate and graduate students. The series covers mass transfer, fluid mechanics, heat transfer and thermo- namics. The 2009 volume contains the four articles on biomedical, environmental and nanoscale transports. The editorial board expresses its appreciation to the c- tributing authors and reviewers who have maintained the standard associated with Advances in Transport Phenomena. We also would like to acknowledge the efforts of the staff at Springer who have made the professional and attractive pr- entation of the volume. Serial Editorial Board Editor-in-Chief Professor L. Q. Wang The University of Hong Kong, Hong Kong; lqwang@hku. hk Editors Professor A. R. Balakrishnan Indian Institute of Technology Madras, India Professor A.
Download or read book EHP written by and published by . This book was released on 1993 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Springer Handbook of Glass by : J. David Musgraves
Download or read book Springer Handbook of Glass written by J. David Musgraves and published by Springer Nature. This book was released on 2019-11-08 with total page 1851 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook provides comprehensive treatment of the current state of glass science from the leading experts in the field. Opening with an enlightening contribution on the history of glass, the volume is then divided into eight parts. The first part covers fundamental properties, from the current understanding of the thermodynamics of the amorphous state, kinetics, and linear and nonlinear optical properties through colors, photosensitivity, and chemical durability. The second part provides dedicated chapters on each individual glass type, covering traditional systems like silicates and other oxide systems, as well as novel hybrid amorphous materials and spin glasses. The third part features detailed descriptions of modern characterization techniques for understanding this complex state of matter. The fourth part covers modeling, from first-principles calculations through molecular dynamics simulations, and statistical modeling. The fifth part presents a range of laboratory and industrial glass processing methods. The remaining parts cover a wide and representative range of applications areas from optics and photonics through environment, energy, architecture, and sensing. Written by the leading international experts in the field, the Springer Handbook of Glass represents an invaluable resource for graduate students through academic and industry researchers working in photonics, optoelectronics, materials science, energy, architecture, and more.
Book Synopsis Biopersistence of Respirable Synthetic Fibers and Minerals by :
Download or read book Biopersistence of Respirable Synthetic Fibers and Minerals written by and published by . This book was released on 1994 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water-Rock Interaction by : Oleg V. Chudaev
Download or read book Water-Rock Interaction written by Oleg V. Chudaev and published by Routledge. This book was released on 2021-07-29 with total page 1350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water-rock interactions play an important role in nearly all physical and chemical processes operating on the Earth's surface and subsurface. This work contains the proceedings of the Eighth International Symposium on Water-Rock Interaction (WRI-8), held in Russia in 1995.
Book Synopsis Constructal Human Dynamics, Security and Sustainability by : A. Bejan
Download or read book Constructal Human Dynamics, Security and Sustainability written by A. Bejan and published by IOS Press. This book was released on 2009-02-26 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Globalization, security infrastructure and energy sustainability can be designed based on a scientific principle. In this book, these objectives are approached based on constructal theory, which means to design such projects as global ‘flow’ architectures that are ‘alive’ with movement of personnel, equipment, information, education, etc. Constructal Human Dynamics, Security and Sustainability highlights the progress made during the NATO Advanced Research Workshop held in Évora, Portugal in May 2008. This workshop brought together social scientists with physicists, engineers and biologists. Together they addressed main topics such as human dynamics viewed as natural phenomena of design generation, flow networks for distribution and collection, large-scale construction projects (e.g., airports, waste storage), logistics, decontamination, energy supply routes, distributed energy systems, water resources management, environmental security sustainability and globalization. The chapters selected for this book represent the interdisciplinary approach and team atmosphere that emerged in Évora.
Book Synopsis Geomechanical and Radiological Impact of Nuclear Tests at Mururoa and Fangataufa (French Polynesia) by :
Download or read book Geomechanical and Radiological Impact of Nuclear Tests at Mururoa and Fangataufa (French Polynesia) written by and published by . This book was released on 1998 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific Basis for Nuclear Waste Management by :
Download or read book Scientific Basis for Nuclear Waste Management written by and published by . This book was released on 1995 with total page 972 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific Basis for Nuclear Waste Management XIX: Volume 412 by : Materials Research Society. Meeting
Download or read book Scientific Basis for Nuclear Waste Management XIX: Volume 412 written by Materials Research Society. Meeting and published by . This book was released on 1996-04-03 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt: Safe and effective management of nuclear waste provides a broad range of challenges for materials science. Waste processing, waste form and engineered barrier properties, interactions between engineered and geological systems, radiation effects, chemistry and transport of waste species, and long-term predictions of repository performance are just some of the scientific problems facing modern society. This book, the nineteenth in a very successful series from MRS, offers an international and interdisciplinary perspective on the issues, and features developments in both fundamental and applied areas. Topics include: excess plutonium dispositioning; spent nuclear fuel; glass waste forms; ceramic and crystalline waste forms; cement waste forms; waste processing; waste container materials; speciation and sorption; bentonite barriers; flow and transport; repository site characterization; natural analogs and performance assessment.
Book Synopsis Proceedings of XVII International Congress on Glass by :
Download or read book Proceedings of XVII International Congress on Glass written by and published by . This book was released on 1995 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific Basis for Nuclear Waste Management XVII by : Materials Research Society
Download or read book Scientific Basis for Nuclear Waste Management XVII written by Materials Research Society and published by . This book was released on 1994 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the ... International Conference on Radioactive Waste Management and Environmental Remediation by :
Download or read book Proceedings of the ... International Conference on Radioactive Waste Management and Environmental Remediation written by and published by . This book was released on 1995 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1992 with total page 1220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Book Synopsis Etude expérimentale de l'influence d'espèces aqueuses sur la cinétique de dissolution du verre nucléaire R7T7 by : Stéphane Gin
Download or read book Etude expérimentale de l'influence d'espèces aqueuses sur la cinétique de dissolution du verre nucléaire R7T7 written by Stéphane Gin and published by . This book was released on 1994 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL EST UNE CONTRIBUTION A L'ETUDE DE LA CORROSION EN PHASE AQUEUSE DU VERRE NUCLEAIRE DE REFERENCE R7T7. IL COMPREND UNE PARTIE BIBLIOGRAPHIQUE QUI FAIT ETAT DES ETUDES ANTERIEURES ET SOULEVE LES DIFFICULTES QUI APPARAISSENT DANS L'INTERPRETATION DES INTERACTIONS DANS LES SYSTEMES CONTENANT DES MATERIAUX ARGILEUX A PROXIMITE DU VERRE. UNE METHODOLOGIE EXPERIMENTALE EST PROPOSEE: ELLE VISE A ETUDIER DE FACON SEPAREE L'EFFET DES ESPECES AQUEUSES INORGANIQUES ET DE QUELQUES ACIDES ORGANIQUES SUR LES MECANISMES ET LA CINETIQUE DE DISSOLUTION DU VERRE R7T7 A 90C. LES RESULTATS EXPERIMENTAUX PRESENTES DANS CE MEMOIRE ACCREDITENT L'IDEE SELON LAQUELLE PLUSIEURS ELEMENTS FORMATEURS DE RESEAU PRESENTENT UN CARACTERE CINETIQUEMENT LIMITANT. L'HYPOTHESE LA PLUS PROBABLE POUR EXPLIQUER L'ABSENCE DE CONDITIONS DE SATURATION VIS-A-VIS DU VERRE DANS CERTAINS MILIEUX ARGILEUX EST LA COMPLEXATION D'ELEMENTS METALLIQUES ISSUS DE LA CORROSION DU VERRE ET PRESENTANT UN ROLE CINETIQUEMENT LIMITANT, TEL QUE L'ALUMINIUM. PAR RAPPORT AUX CONTEXTE DU STOCKAGE GEOLOGIQUE DES VERRES NUCLEAIRES CE TRAVAIL CONTRIBUE A UNE MEILLEURE DEFINITION DES MECANISMES DE BASE DE LA DISSOLUTION DU VERRE. IL PERMETTRA D'INTERPRETER LES ETUDES D'ALTERATION DU VERRE DANS DES SOLUTIONS DE COMPOSITIONS REELLES OU REALISTES ET POURRA CONTRIBUER A LA DEFINITION DE BARRIERES CHIMIQUES PAR AJOUT A PROXIMITE DU COLIS DE VERRE D'ESPECES FAVORISANT LA STABILITE DE LA MATRICE VITREUSE (SILICE AMORPHE, D'HYDROXYDES D'ALUMINIUM, PHOSPHATES)
Book Synopsis Compréhension et modélisation des mécanismes de corrosion des alliages chromino-formeurs dans les verres nucléaires by : Éric Schmucker
Download or read book Compréhension et modélisation des mécanismes de corrosion des alliages chromino-formeurs dans les verres nucléaires written by Éric Schmucker and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: La gestion des déchets radioactifs se fait par confinement des déchets radioactifs dans une matrice vitreuse. Il est réalisé par fusion inductive à 1150°C dans des pots constitués de superalliages riches en chrome. Ces pots sont soumis à une corrosion par le verre entrainant à terme leur remplacement. La protection contre la corrosion par le verre est assurée par l'établissement d'une couche d'oxyde protectrice Cr2O3 à la surface de l'alliage. Un alliage binaire chromino-formeur (Ni-30Cr) a été choisi comme alliage d'étude. Trois compositions de verre sodo- et borosilicatées sont choisies dans le but de discerner l'influence de la basicité et de la viscosité des verres sur les cinétiques de corrosion. La décorrélation des phénomènes de formation et de dissolution a permis la modélisation des cinétiques de croissance globale de la couche d'oxyde en milieu liquide silicaté. Dans ce cadre, la cinétique de formation de l'oxyde en milieu verre est assimilée à la cinétique d'oxydation de l'alliage Ni-30Cr en milieu gazeux sous des pressions partielles d'oxygène représentatives du pouvoir oxydant d'un verre. Les études des cinétiques d'oxydation ont montré que la cinétique d'oxydation de l'alliage Ni-30Cr est indépendante de la pression d'oxygène entre 10-13 et 10-3 atm O2 à 1150°C. Les travaux réalisés ont montré que la cinétique de dissolution de la couche d'oxyde Cr2O3 est limitée par la diffusion du CrIII dans le verre. Cette cinétique de dissolution a été ainsi évaluée à partir de la limite de solubilité et du coefficient de diffusion du CrIII dans les verres. Enfin, la cinétique de la croissance expérimentale de la couche d'oxyde Cr2O3 dans le verre a été modélisée avec succès pour chacun des verres, à partir de (i) la limite de solubilité du CrIII, (ii) son coefficient de diffusion et (iii) la cinétique d'oxydation de l'alliage. Le modèle établi permet également de quantifier l'influence de ces différents paramètres sur la cinétique de croissance de l'oxyde protecteur.
Book Synopsis Mécanismes de corrosion et comportement des actinides dans le verre nucléaire "R7T7" by : Sylvie Fillet
Download or read book Mécanismes de corrosion et comportement des actinides dans le verre nucléaire "R7T7" written by Sylvie Fillet and published by . This book was released on 1987 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
