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Tosolin, A. (author), Vigier, J. F. (author), Mastromarino, S. (author), Konings, R. J.M. (author), Luzzi, L. (author), Beneš, O. (author)Phase equilibria in the ThF<sub>4</sub>-PuF<sub>3</sub> system were measured by differential scanning calorimetry. Samples were encapsulated to prevent leakage during the measurements and to prevent fluoride contamination of the instrument. Formation of intermediate compounds and solid solutions was investigated by X-ray diffraction. A...journal article 2023
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Pater, M. (author), Kaaks, B.J. (author), Lauritzen, Bent (author), Lathouwers, D. (author)The design of a molten salt reactor is largely based on CFD simulations. Phase change plays an important role in the safety of the reactor, but numerical modelling of phase change is particularly challenging. Therefore, the knowledge of the margin of error of CFD simulations involving phase change is very important. Relevant experimental...journal article 2023
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Tiwari, V. (author), Abbink, T. F. (author), Ocadiz flores, J.A. (author), Flèche, J. L. (author), Gueneau, C. (author), Chatain, S. (author), Smith, A.L. (author), Martinet, J. (author), Venard, C. (author)A thorough understanding of the corrosion chemistry between molten salt fuel and structural materials (e.g., steel) is key for the advancement of Molten Salt Reactor technology. In this work, we consider more specifically the case of a chloride fuel salt mixture and the thermochemistry of a salt mixture such as (NaCl-MgCl<sub>2</sub>-PuCl<sub...journal article 2023
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Ocadiz flores, J.A. (author), Konings, R. (author), Smith, A.L. (author)CALPHAD models to compute the density and viscosity of four keystone systems related to Molten Salt Reactor (MSR) technology have been optimized: NaCl-UCl<sub>3</sub>, LiF-ThF<sub>4</sub>, LiF-UF<sub>4</sub>, and LiF-ThF<sub>4</sub>-UF<sub>4</sub>. Revised thermodynamic assessments of all four systems, using the modified quasichemical...journal article 2022
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Davis, L.G. (author), Hania, Ralph (author), Boomstra, Dennis (author), Rossouw, Dillon (author), Charpin-Jacobs, Florence (author), Uhlir, Jan (author), Maracek, Martin (author), Beckers, Helmut (author), Riedel, Sebastian (author)Radiolytic fluorine gas production at temperatures of 40°C to 60°C was investigated for the fluoride salts LiF, BeF<sub>2</sub>, UF<sub>4</sub>, ThF<sub>4</sub>, and 71.7LiF-16BeF<sub>2</sub>-12.3UF<sub>4</sub> (FliBe-UF<sub>4</sub>) by gamma irradiation of powdered samples using spent fuel elements from the High Flux Reactor (HFR) Petten as...journal article 2022
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Dumaire, T. (author), Ocadiz flores, J.A. (author), Konings, R. (author), Smith, A.L. (author)Chloride salts are considered a good alternative to fluoride salts as fuel carrier in the Molten Salt Fast Reactor concepts. The NaCl–ThCl4–PuCl3 fuel salt solution seems very promising, with low melting temperature eutectic compositions, and the potential to be used in a breeder and burner type of reactor design. This work focuses on the...journal article 2022
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Mastromarino, S. (author)The Molten Salt Reactor (MSR) is one of the six types of Generation IV nuclear energy systems with the main goals of sustainability, safety, reliability, economic competitiveness and proliferation resistance. This technology has spawn interest worldwide. Numerous universities, institutes and companies are carrying out research projects related...doctoral thesis 2021
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Ocadiz flores, J.A. (author)Molten salts are a class of ionic liquids which have in recent years been the focus of extensive fundamental research given that they are a versatile class of reaction media with a variety of appealing thermophysical and thermochemical properties (e.g. melting points, heat capacities, vapor pressures, densities, thermal conductivities, etc..)...doctoral thesis 2021
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Ocadiz flores, J.A. (author), Gheribi, A. E. (author), Vlieland, J. (author), Dardenne, K. (author), Rothe, J. (author), Konings, R. (author), Smith, A.L. (author)© 2021 The Authors LiF-UF4 is a key binary system for molten fluoride reactor technology, which has not been scrutinized as thoroughly as the closely related LiF-ThF4 system. The phase diagram equilibria in the system LiF-UF4 are explored in this work with X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The short-range...journal article 2021
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van Oudenaren, G. I.L. (author), Ocadiz flores, J.A. (author), Smith, A.L. (author)Molten chloride salts are ionic liquids in which the anions and cations exhibit network formation. An attractive salt system for use in molten salt reactors is NaCl-UCl<sub>3</sub>, an ionic liquid with complex non-ideal thermodynamic behaviour due to the formation of short-range order. The relationship between local structure and...journal article 2021
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Alsayyari, F.S. (author)Large-scale complex systems require high-fidelity models to capture the dynamics of the system accurately. For example, models of nuclear reactors capture multiphysics interactions (e.g., radiation transport, thermodynamics, heat transfer, and fluid mechanics) occurring at various scales of time (prompt neutrons to burn-up calculations) and...doctoral thesis 2020
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Tiberga, M. (author)The Molten Salt Reactor (MSR) is one of the six Generation-IV nuclear reactor designs. It presents very promising characteristics in terms of safety, sustainability, reliability, and proliferation resistance. Numerous research projects are currently carried out worldwide to bring this future reactor technology to a higher maturity, and in Europe...doctoral thesis 2020
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Santanoceto, M. (author), Tiberga, M. (author), Perko, Z. (author), Dulla, Sandra (author), Lathouwers, D. (author)Uncertainty Quantification (UQ) of numerical simulations is highly relevant in the study and design of complex systems. Among the various approaches available, Polynomial Chaos Expansion (PCE) analysis has recently attracted great interest. It belongs to non-intrusive spectral projection methods and consists of constructing system responses...conference paper 2020
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Ocadiz flores, J.A. (author), Carré, E. (author), Griveau, J. C. (author), Colineau, E. (author), Capelli, E. (author), Souček, P. (author), Beneš, O. (author), Smith, A.L. (author)A thermodynamic assessment of the KF-ThF<sub>4</sub> binary system using the CALPHAD method is presented, where the liquid solution is described by the modified quasichemical formalism in the quadruplet approximation. The optimization of the phase diagram is based on experimental data reported in the literature and newly measured X-ray...journal article 2020
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Tiberga, M. (author), de Oliveira, Rodrigo Gonzalez Gonzaga (author), Cervi, Eric (author), Blanco, Juan Antonio (author), Lorenzi, Stefano (author), Aufiero, Manuele (author), Lathouwers, D. (author), Rubiolo, Pablo (author)Verification and validation of multi-physics codes dedicated to fast-spectrum molten salt reactors (MSR) is a very challenging task. Existing benchmarks are meant for single-physics codes, while experimental data for validation are absent. This is concerning, given the importance numerical simulations have in the development of fast MSR...journal article 2020
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Alsayyari, F.S. (author), Tiberga, M. (author), Perko, Z. (author), Lathouwers, D. (author), Kloosterman, J.L. (author)We use a novel nonintrusive adaptive Reduced Order Modeling method to build a reduced model for a molten salt reactor system. Our approach is based on Proper Orthogonal Decomposition combined with locally adaptive sparse grids. Our reduced model captures the effect of 27 model parameters on k<sub>eff</sub> of the system and the spatial...journal article 2020
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Tosolin, A. (author), Colle, J. Y. (author), Mastromarino, S. (author), Souček, P. (author), Luzzi, L. (author), Konings, R. (author), Beneš, O. (author)The mixture LiF-ThF<sub>4</sub>-UF<sub>4</sub>-PuF<sub>3</sub> (77.5–6.6-12.3–3.6 mol%), a fuel option for the Molten Salt Fast Reactor (MSFR), has been measured by differential scanning calorimetry (DSC) for determination of phase transitions, and by Knudsen effusion mass spectrometry (KEMS) for measurement of partial vapour pressures. The...journal article 2019
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Ocadiz flores, J.A. (author), Capelli, E. (author), Raison, P. E. (author), Konings, R. (author), Smith, A.L. (author)Using the modified quasi-chemical model in the quadruplet approximation, three new thermodynamic assessments of binary systems useful for the detailed operational design of the Molten Salt Reactor are presented: AF-NiF<sub>2</sub> (A = Li, Na, K). These systems are particularly relevant for the study of the molten salt-structural materials...journal article 2018
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Capelli, E. (author), Konings, R. (author)The complete thermodynamic description of the niobium-fluorine system is presented for the first time in this work. It results from a critical evaluation of the available experimental data and new thermodynamic calculations. In total, three niobium fluoride solid phases (NbF<sub>3</sub>, NbF<sub>4</sub> and NbF<sub>5</sub>) and seven gaseous...journal article 2018
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Capelli, E. (author), Beneš, O. (author), Konings, R. (author)The present study describes the full thermodynamic assessment of the Li,Cs,Th//F,I system. The existing database for the relevant fluoride salts considered as fuel for the Molten Salt Reactor (MSR) has been extended with two key fission products, cesium and iodine. A complete evaluation of all the common-ion binary and ternary sub-systems of...journal article 2018
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