Determination of the maximum dissolution rates of the Belgian reference glasses at very alkaline pH and 30 °C

Karine Ferrand¹, Sébastien Caes¹, Karel Lemmens¹, Katrien Meert²

1: SCK CEN, Belgium; 2: ONDRAF/NIRAS, Belgium

The effect of alkali metal and alkaline earth cations on the dissolution behaviour of UK High Level Waste glass

Jenny Ayling¹, Mike Harrison², Claire Corkhill^1,3, Clare. L Thorpe¹

1: NucleUS Immobilisation Science Laboratory, Department of Materials Science and Engineering, University of Sheffield, Sheffield, UK; 2: National Nuclear Laboratory, Central Laboratory, Sellafield, Cumbria, UK; 3: School of Earth Sciences, South West Nuclear Hub, University of Bristol, Bristol, UK

Impact of iron on the durability of vitrified radioactive waste

Rachel Crawford¹, Claire Corkhill², Clare L Thorpe¹

1: Immobilisation Science Laboratory, Department of Materials Science and Engineering, The University of Sheffield, Sheffield, UK; 2: School of Earth Sciences, South West Nuclear Hub, University of Bristol, Bristol, UK

The use of glasses from archeological and natural sites to understand the long-term alteration of nuclear waste glasses

James Neeway¹, Jose Marcial¹, Carolyn Pearce¹, David Kosson², Clare Thorpe³, Russell Hand³, Albert Kruger⁴

1: Pacific Northwest National Laboratory, USA; 2: Vanderbilt University, USA; 3: The University of Sheffield, United Kingdom; 4: US Department of Energy, Office of River Protection, USA

Glass alteration in complex natural environments: results from the Ballidon long-term burial experiment

Clare L Thorpe, Garry Manifold, Stuart Creasey-Gray, Rachel Crawford, Claire L Corkhill, Russell J Hand

University of Sheffield, United Kingdom

High Energy Radiation Tolerance of Iron Phosphate Glasses: Molecular Dynamics Study

Cillian James Cockrell¹, Kitheri Joseph², Maulik Patel³, Robin Grimes¹, Kostya Trachenko⁴

1: Imperial College London, United Kingdom; 2: Indira Gandhi Centre for Atomic Research; 3: University of Liverpool; 4: Queen Mary University of London

Nuclear waste glasses: flow under beta-particle and electron beam irradiation

Michael Ojovan

Imperial College London, United Kingdom

Effect of 241Am buildup during spent fuel cooling on decay heat of vitrified waste and post-closure safety assessment

Tomofumi Sakuragi¹, Ryo Hamada¹, Miki Harigai¹, Hidekazu Asano¹, Toshiro Oniki², Ryosuke Ito²

1: Radioactive Waste Management Funding and Research Center; 2: IHI Corporation

Leaching experiments with medium and high burn-up spent UOX fuels under anoxic and reducing conditions in highly alkaline media

Tobias König¹, Elke Bohnert¹, Roberto Gaggiano², Michel Herm¹, Katrien Meert², Volker Metz¹, Arndt Walschburger¹, Horst Geckeis¹

1: Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal (KIT-INE), Germany; 2: Organisme National des Déchets Radioactifs et des Matières Fissiles Enrichies / Nationale Instelling voor Radioactief Afval en Verrijkte Splijtstoffen (ONDRAF-NIRAS), Belgium

Fission product release from spent nuclear UOX fuel dissolution: comparison between anoxic and reducing conditions and impact of pH

Thierry Mennecart¹, Christelle Cachoir¹, Karel Lemmens¹, Roberto Gaggiano², Katrien Meert², Tomas Vandoorne²

1: SCK CEN, Belgium; 2: ONDRAF/NIRAS, Belgium

Modelling of Mo, Tc, Rh, Ru release from high burnup spent nuclear fuel at alkaline and hyperalkaline pH

Joan De Pablo¹, Javier Giménez¹, Daniel Serrano-Purroy², Frederic Clarens³, Albert Martínez-Torrent³

1: UPC-Barcelona Tech, Barcelona (Spain); 2: European Commission, Joint Research Centre (JRC), Karlsruhe (Germany); 3: Eurecat, Centre Tecnologic Catalunya, WEEI unit, Manresa(Spain)

Aqueous leaching of Cr2O3-doped UO2 spent nuclear fuel under H2 atmosphere

Alexandre Barreiro-Fidalgo¹, Lena Zetterström Evins², Olivia Roth²

1: Studsvik Nuclear AB, Sweden; 2: Swedish Nuclear Fuel and Waste Management Co (SKB), Sweden

Reuse, recycling and conditioning of plutonium and americium. An overview on the recent activities at the JRC

Karin Popa, Jean-François Vigier, Daniel Freis, Rudy J.M. Konings

European Commission, Joint Research Centre, Karlsruhe, Germany

Preparation of Am-containing transmutation targets

Gamze Colak^1,2, Gregory Leinders¹, Rémi Delville¹, Marc Verwerft¹, Jef Vleugels²

1: Belgian Nuclear Research Centre (SCK CEN), Institute for Nuclear Materials Science, Boeretang 200, B-2400 Mol, Belgium.; 2: KU Leuven, Department of Materials Engineering, Kasteelpark Arenberg 44, B-3001 Leuven, Belgium.

Study of the structural evolution induced by air oxidation of UO2 to U3O7

Jone Miren Elorrieta Baigorri¹, Abel Milena Pérez¹, Jean François Vigier², Laura Jiménez Bonales¹, María Nieves Rodríguez Villagra¹, Valentín García Baonza³, Joaquín Cobos Sabate⁴, Hitos Galán Montano¹

1: Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Av. Complutense 40, 28040, Madrid, Spain; 2: European Commission, Joint Research Centre (JRC), 76125, Karlsruhe, Germany; 3: MALTA-Consolider Team, Dep. Química Física, Fac. Ciencias Químicas, Universidad Complutense and Instituto de Geociencias IGEO (CSIC-UCM), 28040 Madrid, Spain; 4: Estación Biológica de Doñana (EBD-CSIC), Av. Américo Vespucio 26, 41092 Seville, Spain

Probing the Defect Structure in Single-Phase UO2+x Systems

Maik K. Lang¹, William F. Cureton², Eric C. O’Quinn¹, Gianguido Baldinozzi³, Joerg Neuefeind², Matthew G. Tucker², Andrew T. Nelson²

1: University of Tennessee, United States of America; 2: Oak Ridge National Laboratory, United States of America; 3: Centrale Supélec, Université Paris-Saclay, France

The effect of Nd and Gd doping on the microstructure of UO2-based model systems for spent nuclear fuel

Robert Thümmler¹, Juri Barthel², Philip Kegler¹, Martina Klinkenberg¹, Joachim Mayer², Dirk Bosbach¹, Felix Brandt¹

1: Institute of Energy and Climate Research: Nuclear Waste Management and Reactor Safety (IEK-6), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany; 2: Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons (ER-C), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany

Thermodynamic modelling of the oxidation of Ln- and Pu-doped UO2

Victor L. Vinograd, Andrey A. Bukaemskiy, Guido Deissmann, Giuseppe Modolo, Dirk Bosbach

Forschungszentrum Jülich GmbH, Germany

Preparation and Oxidation of 0-20 at.% Zr-doped uranium oxides

Sam E. Karcher¹, Malin C. Dixon Wilkins¹, Xiaofeng Guo², John S. McCloy¹

1: School of Mechanical and Materials Engineering, Washington State University, Pullman WA, 99164, USA; 2: Department of Chemistry, Washingon State University, Pullman WA 99164, USA

Electrochemical studies of Mo-doped UO2 under alkaline conditions

Sonia García-Gómez¹, Javier Giménez¹, Ignasi Casas¹, Jordi Llorca¹, Joan de Pablo^1,2

1: Universitat Politècnica de Catalunya, Spain; 2: EURECAT, Centre Tecnològic de Catalunya. Manresa, Spain

Hydrothermal synthesis of (U,Th)Ox reference materials for nuclear safeguards

Nicolas Clavier¹, Pierre Asplanato^1,2, Wassima Zannouh¹, Nicolas Dacheux¹, Anne-Laure Fauré², Fabien Pointurier²

1: ICSM, France; 2: CEA, DAM, DIF, France

Effect of Tri- and Tetravalent Dopants on the Thermal Conversion of Uranium Diuranate into Doped UO3 and U3O8 and Their Structural Investigation

Shannon Kimberly Potts¹, Philip Kegler¹, Giuseppe Modolo¹, Karin Popa², Walter Bonani², Olaf Walter², Jean-Yves Colle², Rudy Konings², Irmgard Niemeyer¹, Dirk Bosbach¹, Stefan Neumeier¹

1: Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research – Nuclear Waste Management (IEK-6), 52428 Jülich, Germany; 2: European Commission, Joint Research Centre (JRC), Karlsruhe, Germany