HR job title
- Professor
- Contact Info
- 1 979 862 2033
Ragusa, Jean Professor
Positions
- Professor, Nuclear Engineering, College of Engineering
Expertise in scientifi c computing (solution techniques, algorithms), predictive science (uncertainty quantifi cation, inference), and data science (machine learning, model-order reduction) applied to complex radiation /
multi-physics problems in nuclear engineering (nuclear reactors, national security, radiation treatment planning).
multi-physics problems in nuclear engineering (nuclear reactors, national security, radiation treatment planning).
Expertise in scientific computing (solution techniques, algorithms), predictive science (uncertainty quantification, inference), and data science (machine learning, model-order reduction) applied to complex radiation / multi-physics problems in nuclear engineering (nuclear reactors, national security, radiation treatment planning).
Research Areas
- Overview
- Publications
- Research
- Teaching
- Works By Students
- Background
- Contact
- Other
- View All
Overview
Publications
selected publications
-
academic article
-
Freile, R., Tano, M. E., & Ragusa, J. C.
(2024).
CFD assessment of RANS turbulence modeling for solidification in internal flows against experiments and higher fidelity LBM-LES phase change model. Annals of Nuclear Energy.
197, 110275-110275.
-
Halvic, I., & Ragusa, J. C.
(2023).
Non-intrusive model order reduction for parametric radiation transport simulations. Journal of Computational Physics.
492, 112385-112385.
-
Huhn, Q. A., Tano, M. E., & Ragusa, J. C.
(2023).
Physics-Informed Neural Network with Fourier Features for Radiation Transport in Heterogeneous Media. 197(9), 2484-2497.
-
Freile, R., Tano, M. E., & Ragusa, J. C.
(2023).
Lattice Boltzmann solidification modeling of forced convection internal flows applied to Gen-IV nuclear reactor coolants. 163, 104785-104785.
-
Halvic, I., Caron, D., Aranda, I., & Ragusa, J. C.
(2023).
Non-intrusive reduced-order modeling of radiation transport in the atmosphere. Annals of Nuclear Energy.
188, 109798-109798.
-
Behne, P., Vermaak, J., & Ragusa, J.
(2023).
Parametric Model-Order Reduction for Radiation Transport Simulations Based on an Affine Decomposition of the Operators. Nuclear Science and Engineering.
197(2), 233-261.
-
Huhn, Q. A., Tano, M. E., Ragusa, J. C., & Choi, Y.
(2023).
Parametric dynamic mode decomposition for reduced order modeling. 475, 111852-111852.
-
Behne, P., & Ragusa, J. C.
(2023).
Parametric model-order reduction for radiation transport using multi-resolution proper orthogonal decomposition. Annals of Nuclear Energy.
180, 109432-109432.
-
Behne, P., Vermaak, J., & Ragusa, J. C.
(2022).
Minimally-invasive parametric model-order reduction for sweep-based radiation transport. Journal of Computational Physics.
469, 111525-111525.
-
Kyriakopoulos, V., Tano, M. E., & Ragusa, J. C.
(2022).
Development of a Single-Phase, Transient, Subchannel Code, within the MOOSE Multi-Physics Computational Framework. Energies.
15(11), 3948-3948.
-
German, P., Tano, M., Fiorina, C., & Ragusa, J. C.
(2022).
GeN-ROM-An OpenFOAM(R)-based multiphysics reduced-order modeling framework for the analysis of Molten Salt Reactors. 146, 104148-104148.
-
Tano, M., Ragusa, J., Caron, D., & Behne, P.
(2021).
Affine reduced-order model for radiation transport problems in cylindrical coordinates. Annals of Nuclear Energy.
158, 108214-108214.
-
German, P., Tano, M. E., Fiorina, C., & Ragusa, J. C.
(2021).
Data-Driven Reduced-Order Modeling of Convective Heat Transfer in Porous Media. 6(8), 266-266.
-
Tano, M., German, P., & Ragusa, J.
(2021).
Evaluation of pressure reconstruction techniques for Model Order Reduction in incompressible convective heat transfer. Thermal Science and Engineering Progress.
23, 100841-100841.
-
Tano, M. E., & Ragusa, J. C.
(2021).
Coupled Computational Fluid Dynamics-Discrete Element Method Study of Bypass Flows in a Pebble Bed Reactor. Nuclear Technology.
207(10), 1599-1614.
-
Tano, M. E., & Ragusa, J. C.
(2021).
Sweep-Net: An Artificial Neural Network for radiation transport solves. Journal of Computational Physics.
426, 109757-109757.
-
Vermaak, J., Ragusa, J. C., & Morel, J. E.
(2021).
Massively Parallel Transport Sweeps on Meshes with Cyclic Dependencies. 425, 109892-109892.
-
Zhang, Y., Ragusa, J. C., & Morel, J. E.
(2020).
Model Error Estimation for the Simplified PN Radiation Transport Equations. Nuclear Science and Engineering.
194(10), 903-926.
-
Baines, W., Kuchment, P., & Ragusa, J.
(2020).
Deep learning for 2D passive source detection in presence of complex cargo. Inverse Problems.
36(10), 104001-104001.
-
Prince, Z. M., & Ragusa, J. C.
(2020).
Space-energy separated representations for multigroup neutron diffusion using proper generalized decompositions. Annals of Nuclear Energy.
142, 107360-107360.
-
Hanus, M., & Ragusa, J. C.
(2020).
Thermal Upscattering Acceleration Schemes for Parallel Transport Sweeps. Nuclear Science and Engineering.
194(10), 873-893.
-
Prince, Z. M., & Ragusa, J. C.
(2020).
Application of proper generalized decomposition to multigroup neutron diffusion eigenvalue calculations. 121, 103232-103232.
-
Zhang, Y., Morel, J. E., & Ragusa, J. C.
(2020).
Convergence behavior of second-order transport equations in near-void problems. Journal of Quantitative Spectroscopy and Radiative Transfer.
244, 106843-106843.
-
Jeffers, R. S., Kphzi, J., Eaton, M. D., Fvotte, F., Hlsemann, F., & Ragusa, J.
(2020).
Goal-Based Error Estimation for the Multi-Dimensional Diamond Difference and Box Discrete Ordinate (SN) Methods. Transport Theory and Statistical Physics.
49(2), 51-87.
-
Guermond, J., Popov, B., & Ragusa, J.
(2020).
POSITIVE AND ASYMPTOTIC PRESERVING APPROXIMATION OF THE RADIATION TRANSPORT EQUATION. SIAM Journal on Numerical Analysis.
58(1), 519-540.
-
German, P., Tano, M., Ragusa, J. C., & Fiorina, C.
(2020).
Comparison of Reduced-Basis techniques for the model order reduction of parametric incompressible fluid flows. 130.
-
Kloosterman, J. L., Merle, E., & Ragusa, J. C.
(2020).
Editorial : progress in the science and technology of nuclear reactors using molten salts. EPJ Nuclear Sciences & Technologies.
6, e1-E1.
-
German, P., & Ragusa, J. C.
(2019).
Reduced-order modeling of parameterized multi-group diffusion -eigenvalue problems. 134, 144-157.
-
Hanus, M., Harbour, L. H., Ragusa, J. C., Adams, M. P., & Adams, M. L.
(2019).
Uncollided flux techniques for arbitrary finite element meshes. Journal of Computational Physics.
398, 108848-108848.
-
German, P., Ragusa, J. C., & Fiorina, C.
(2019).
Application of multiphysics model order reduction to doppler/neutronic feedback. 5(17), 17-17.
-
Prince, Z. M., & Ragusa, J. C.
(2019).
Parametric uncertainty quantification using proper generalized decomposition applied to neutron diffusion. 119(9), 899-921.
-
Prince, Z. M., & Ragusa, J. C.
(2019).
Multiphysics reactor-core simulations using the improved quasi-static method. Annals of Nuclear Energy.
125, 186-200.
-
Hackemack, M. W., & Ragusa, J. C.
(2018).
Quadratic serendipity discontinuous finite element discretization for SN transport on arbitrary polygonal grids. 374, 188-212.
-
Hansel, J. E., & Ragusa, J. C.
(2018).
Flux-corrected transport techniques applied to the radiation transport equation discretized with continuous finite elements. Journal of Computational Physics.
354, 179-195.
-
Jeffers, R. S., Kphzi, J., Eaton, M. D., Fvotte, F., Hlsemann, F., & Ragusa, J.
(2017).
Goal-Based Error Estimation, Functional Correction, h, p and hp Adaptivity of the 1-D Diamond Difference Discrete Ordinate Method. Transport Theory and Statistical Physics.
46(6-7), 427-458.
-
Delchini, M. O., Ragusa, J. C., & Ferguson, J.
(2017).
Viscous regularization of the full set of nonequilibrium-diffusion Grey Radiation-Hydrodynamic equations. 85(1), 30-47.
-
Delchini, M. O., Ragusa, J. C., & Berry, R. A.
(2017).
Simulations of single- and two-phase shock tubes and gravity-driven wave problems with the RELAP-7 nuclear reactor system analysis code. Nuclear Engineering and Design.
319, 106-116.
-
Jeffers, R. S., Kphzi, J., Eaton, M. D., Fvotte, F., Hlsemann, F., & Ragusa, J.
(2017).
Goal-based h-adaptivity of the 1-D diamond difference discrete ordinate method. Journal of Computational Physics.
335, 179-200.
-
Maginot, P. G., Ragusa, J. C., & Morel, J. E.
(2017).
Nonnegative Methods for Bilinear Discontinuous Differencing of the SN Equations on Quadrilaterals. Nuclear Science and Engineering.
185(1), 53-69.
-
Maginot, P. G., Ragusa, J. C., & Morel, J. E.
(2016).
High-order solution methods for grey discrete ordinates thermal radiative transfer. Journal of Computational Physics.
327, 719-746.
-
Delchini, M. O., Ragusa, J. C., & Berry, R. A.
(2016).
Viscous Regularization for the Non-equilibrium Seven-Equation Two-Phase Flow Model. Journal of Scientific Computing.
69(2), 764-804.
-
Olson, A., Ciabatti, A., Hristova, Y., Kuchment, P., Ragusa, J., & Allmarasd, M.
(2016).
Passive Detection of Small Low-Emission Sources: Two-Dimensional Numerical Case Studies. Nuclear Science and Engineering.
184(1), 125-150.
-
Peterson, J. R., Morel, J. E., & Ragusa, J. C.
(2016).
RESIDUAL MONTE CARLO FOR THE ONE-DIMENSIONAL PARTICLE TRANSPORT EQUATION. SIAM Journal on Scientific Computing.
38(6), B941-B961.
-
Delchini, M. O., Ragusa, J. C., & Morel, J.
(2015).
Entropy-based artificial viscosity stabilization for non-equilibrium Grey Radiation-Hydrodynamics. Journal of Computational Physics.
296, 293-313.
-
Delchini, M. O., Ragusa, J. C., & Berry, R. A.
(2015).
Entropy-based viscous regularization for the multi-dimensional Euler equations in low-Mach and transonic flows. Computers and Fluids.
118, 225-244.
-
Maginot, P. G., Ragusa, J. C., & Morel, J. E.
(2015).
Lumping Techniques for DFEM SN Transport in Slab Geometry. Nuclear Science and Engineering.
179(2), 148-163.
-
Ragusa, J. C.
(2015).
Discontinuous finite element solution of the radiation diffusion equation on arbitrary polygonal meshes and locally adapted quadrilateral grids. Journal of Computational Physics.
280, 195-213.
-
Chirayath, S., Giannangili, D., Elmore, R., Hollenbeck, G., Chandregowda, N., Charlton, W., Metcalf, R., & Ragusa, J.
(2015).
Proliferation Resistance Analysis and Evaluation Tool for Observed Risk (PRAETOR) Methodology. Journal of Nuclear Materials Management.
XLIII(2), 22-47.
-
Hansen, J., Peterson, J., Morel, J., Ragusa, J., & Wang, Y.
(2014).
A Least-Squares Transport Equation Compatible with Voids. Journal of Computational and Theoretical Transport.
43(1-7), 374-401.
-
Maginot, P. G., Ragusa, J. C., & Morel, J. E.
(2014).
Discontinuous finite element discretizations for the SN neutron transport equation in problems with spatially varying cross sections. Annals of Nuclear Energy.
73, 506-526.
-
Turcksin, B., & Ragusa, J. C.
(2014).
Discontinuous diffusion synthetic acceleration for Sn transport on 2D arbitrary polygonal meshes. 274, 356-369.
-
Bruss, D. E., Morel, J. E., & Ragusa, J. C.
(2014).
S2SA preconditioning for the Sn equations with strictly nonnegative spatial discretization. Journal of Computational Physics.
273, 706-719.
-
Chambers, A., & Ragusa, J. C.
(2014).
Multi-recycling of transuranic elements in a PWR assembly with reduced fuel rod diameter. Nuclear Engineering and Design.
270, 436-450.
-
Guermond, J., Kanschat, G., & Ragusa, J.
(2014).
Discontinuous Galerkin methods for the radiative transport equation. 157, 181-193.
-
Kanschat, G., & Ragusa, J.
(2014).
A ROBUST MULTIGRID PRECONDITIONER FOR SNDG APPROXIMATION OF MONOCHROMATIC, ISOTROPIC RADIATION TRANSPORT PROBLEMS. 36(5), A2326-A2345.
-
Zhang, Y., Ragusa, J. C., & Morel, J. E.
(2013).
Iterative performance of various formulations of the SPN equations. Journal of Computational Physics.
252, 558-572.
-
Morel, J. E., Ragusa, J. C., Adams, M. L., & Kanschat, G.
(2013).
Asymptotic PN-Equivalent SN+1 Equations. Transport Theory and Statistical Physics.
42(1), 3-20.
-
Maginot, P. G., Morel, J. E., & Ragusa, J. C.
(2012).
A non-negative moment-preserving spatial discretization scheme for the linearized Boltzmann transport equation in 1-D and 2-D Cartesian geometries. Journal of Computational Physics.
231(20), 6801-6826.
-
Mahadevan, V. S., Ragusa, J. C., & Mousseau, V. A.
(2012).
A verification exercise in multiphysics simulations for coupled reactor physics calculations. PROGRESS IN NUCLEAR ENERGY.
55, 12-32.
-
Ragusa, J. C., Guermond, J., & Kanschat, G.
(2012).
A robust SN-DG-approximation for radiation transport in optically thick and diffusive regimes. 231(4), 1947-1962.
-
Turcksin, B., Ragusa, J. C., & Morel, J. E.
(2012).
Angular Multigrid Preconditioner for Krylov-Based Solution Techniques Applied to the Sn Equations with Highly Forward-Peaked Scattering. Transport Theory and Statistical Physics.
41(1-2), 1-22.
-
Sanchez, R., & Ragusa, J.
(2011).
On the Construction of Galerkin Angular Quadratures. Nuclear Science and Engineering.
169(2), 133-154.
-
McDeavitt, S. M., Ragusa, J., Revankar, S. T., Solomon, A. A., & Malone, J.
(2011).
A high-conductivity oxide fuel concept. NUCLEAR ENGINEERING INTERNATIONAL.
56(682), 40-42.
-
Wang, Y., & Ragusa, J. C.
(2011).
Standard and goal-oriented adaptive mesh refinement applied to radiation transport on 2D unstructured triangular meshes. Journal of Computational Physics.
230(3), 763-788.
-
Wang, Y., & Ragusa, J. C.
(2010).
Diffusion Synthetic Acceleration for High-Order Discontinuous Finite Element SN Transport Schemes and Application to Locally Refined Unstructured Meshes. Nuclear Science and Engineering.
166(2), 145-166.
-
Turcksin, B., Ragusa, J. C., & Bangerth, W.
(2010).
Goal-Oriented h-Adaptivity for the Multigroup SPN Equations. 165(3), 305-319.
-
Ragusa, J. C., & Wang, Y.
(2010).
A two-mesh adaptive mesh refinement technique for SN neutral-particle transport using a higher-order DGFEM. 233(12), 3178-3188.
-
Ragusa, J. C.
(2010).
APPLICATION OF h-, p-, and hp-MESH ADAPTATION TECHNIQUES TO THE SP3 EQUATIONS. 39(2-4), 234-254.
-
Ragusa, J., & Wang, Y.
(2010).
Adaptive mesh refinement techniques for diffusion-synthetic- accelerated discrete-ordinates neutral particle transport. Il Nuovo Cimento C - Colloquia on Physics.
33(1), 215-222.
-
Chirayath, S. S., Hollenbeck, G., Ragusa, J., & Nelson, P.
(2009).
Neutronic and nonproliferation characteristics of (PuO2-UO2) and (PuO2-ThO2) as fast reactor fuels. Nuclear Engineering and Design.
239(10), 1916-1924.
-
Wang, Y., & Ragusa, J. C.
(2009).
On the Convergence of DGFEM Applied to the Discrete Ordinates Transport Equation for Structured and Unstructured Triangular Meshes. Nuclear Science and Engineering.
163(1), 56-72.
-
Wang, Y., & Ragusa, J. C.
(2009).
A high-order discontinuous Galerkin method for the SN transport equations on 2D unstructured triangular meshes. 36(7), 931-939.
-
Rogers, T., Ragusa, J., Schultz, S., & St. Clair, R.
(2009).
Optimization of PWR fuel assembly radial enrichment and burnable poison location based on adaptive simulated annealing. Nuclear Engineering and Design.
239(6), 1019-1029.
-
Wang, Y., Bangerth, W., & Ragusa, J.
(2009).
Three-dimensional h-adaptivity for the multigroup neutron diffusion equations. 51(3), 543-555.
-
Ragusa, J. C., & Mahadevan, V. S.
(2009).
Consistent and accurate schemes for coupled neutronics thermal-hydraulics reactor analysis. Nuclear Engineering and Design.
239(3), 566-579.
-
Wang, Y., & Ragusa, J.
(2009).
Application of hp Adaptivity to the Multigroup Diffusion Equations. Nuclear Science and Engineering.
161(1), 22-48.
-
Ragusa, J. C.
(2008).
A simple Hessian-based 3D mesh adaptation technique with applications to the multigroup diffusion equations. Annals of Nuclear Energy.
35(11), 2006-2018.
-
Sanchez, R., Ragusa, J., & Masiello, E.
(2008).
Asymptotic theory of the linear transport equation in anisotropic media. Journal of Mathematical Physics.
49(8), 083504.
-
Ragusa, J., Sanchez, R., & Santandrea, S.
(2007).
Application of Duality Principles to Reflector Homogenization. Nuclear Science and Engineering.
157(3), 299-315.
-
Freile, R., Tano, M. E., & Ragusa, J. C.
(2024).
CFD assessment of RANS turbulence modeling for solidification in internal flows against experiments and higher fidelity LBM-LES phase change model. Annals of Nuclear Energy.
197, 110275-110275.
-
chapter
-
Ragusa, J. C.
(2024).
Chapter 7 Coupled multiphysics simulations in nuclear reactor design and safety. Smith, C. L., Le Blanc, K., & Mandelli, D. (Eds.),
Risk-Informed Methods and Applications in Nuclear and Energy Engineering.
(pp. 91-112).
Elsevier.
-
Ragusa, J. C.
(2024).
Chapter 7 Coupled multiphysics simulations in nuclear reactor design and safety. Smith, C. L., Le Blanc, K., & Mandelli, D. (Eds.),
Risk-Informed Methods and Applications in Nuclear and Energy Engineering.
(pp. 91-112).
Elsevier.
-
conference paper
-
Morelova, N., Kriventsev, V., Fiorina, C., Clifford, I., Kelm, S., Lorenzi, S., ... Forget, B.
(2023).
IAEA Initiative on Open-Source Nuclear Codes for Reactor Analysis. The Proceedings of the International Conference on Nuclear Engineering (ICONE).
1639-1639.
-
Fiorina, C., Sherwise, P., Dufresne, A., Ragusa, J., Ivanov, K., Valentine, T., ... Clifford, I.
(2021).
An Initiative For The Development And Application Of Open-Source Multi-Physics Simulation In Support Of R&D And E&T In Nuclear Science And Technology. EPJ Web of Conferences.
02040-02040.
-
German, P., Tano, M., Ragusa, J., & Fiorina, C.
(2021).
Reduced-Order Modeling of Parameterized Transient Flows in Closed-Lloop Systems. EPJ Web of Conferences.
06055-06055.
-
Tano, M., Rubiolo, P., & Ragusa, J.
(2021).
Accuracy Analysis Of Near Wall Thermal- Hydraulics Modeling Of Molten Salt Reactors. Nuclear Science and Engineering.
-
Tano, M., Rubiolo, P., & Ragusa, J.
(2021).
Progress In Thermal-Hydraulics Modeling Of The Molten Salt Fast Reactor. Nuclear Science and Engineering.
-
Behne, P., Ragusa, J., & Tano, M.
(2021).
Projection-based Parametric Model Order Reduction for Transport Simulation Based on Affine Decomposition of the Operators. 479-488.
-
Prince, Z., & Ragusa, J.
(2021).
Separated Representation of Spatial Dimensions in SN Neu- tron Transport using the Proper Generalized Decomposition. Nuclear Science and Engineering.
-
Tano, M., & Ragusa, J.
(2021).
Using Artificial Neural Networks To Accelerate Trans- port Solves. EPJ Web of Conferences.
-
Rysz, H., Chirayath, S., & Ragusa, J.
(2020).
Uncertainty Quantification of Plu- tonium Inventory Calculations through Xenon Gas Sampling of Underground Waste Tanks containing High-Level Radioactive Waste from Uranium Reprocessing
-
Tano, M., German, P., & Ragusa, J.
(2020).
Pressure Reconstruction for Reduced Order Models of Convective Heat Transfer
-
Kelm, S., Fiorina, C., Ivanov, K., Lindley, B., Ragusa, J., Dechenaux, J., ... Clifford, I.
(2020).
Recent Progress In The International Initiative On The Development Of An Open Source Platform For E&T And R&D In Nuclear Applications
-
German, P., Tano, M., & Ragusa, J.
(2020).
Reduced-Order Modeling of fluid flows in molten salt systems
-
Turner, R., & Ragusa, J.
(2019).
Axially Quadratic Discontinuous Finite Elements for Neutron Transport Reactor Simulations
-
Behne, P., Ragusa, J., & Morel, J.
(2019).
Model Order Reduction for Sn Radiation Transport
-
German, P., Ragusa, J., Fiorina, C., & Tano, M.
(2019).
Reduced-Order Modeling of Parametrized Multi-Physics Computations for the Molten Salt Fast Reactor
-
Prince, Z. M., & Ragusa, J. C.
(2019).
Parametric neutron diffusion using proper generalized decomposition for uncertainty quantification
-
Tano, M., & Ragusa, J.
(2019).
Accelerating Radiation SN Transport Solves Using Artificial Neural Networks
-
Tano, M., Rubiolo, P., & Ragusa, J.
(2019).
Direct Numerical Simulations of Turbulence in Molten Salts Coolants
-
Hanus, M., & Ragusa, J.
(2019).
Improving the Performance of Transport Sweeps with Thermal Upscattering Acceleration at Massively Parallel Scale
-
Tano, M., Rubiolo, P., & Ragusa, J.
(2019).
Nonlinear Eddy Viscosity Models for the Tur- bulence Phenomena in Molten Salt Reactors
-
Prince, Z., & Ragusa, J.
(2019).
Proper Generalized Decomposition of Multigroup Neutron Diffusion with Separated Space-Energy Representation
-
Harbour, L., Ragusa, J., Wang, Y., Schumert, S., Gaston, D., & Dehart, M.
(2019).
Uncollided-Flux Treatment for Discrete-Ordinate Radiation Transport Solutions in the Rattlesnake Code System
-
Ghaddar, T., Ragusa, J., Vermaak, J., & Adams, M.
(2019).
Approaches to Load Balancing Massively Parallel Transport Sweeps on Unstructured Grids
-
German, P., Tano, M., Ragusa, J., & Fiorina, C.
(2019).
Reduced-Order Modeling of Fluid Flows in Closed-Loop Systems. 1762-1764.
-
Hanus, M., Harbor, L., Ragusa, J., Adams, M., & Adams, M. P.
(2019).
Uncollided-Flux Treatment in Arbitrary Polyhedral Grids
-
Halvic, I., & Ragusa, J.
(2018).
Adjoint-based sensitivity for radiation transport using an Eddington tensor formulation. Transactions of the American Nuclear Society.
635-638.
-
Prince, Z. M., & Ragusa, J. C.
(2018).
Application of proper generalized decomposition to heterogeneous diffusion-reaction problems. Transactions of the American Nuclear Society.
695-698.
-
Bruss, D., Morel, J., & Ragusa, J.
(2017).
Adjoint-Based Uncer- tainty Quantification for Radiation Transport Calculations with Un- certain Cross-Section Data
-
Hanus, M., Ragusa, J., & Hackemack, M.
(2017).
A Study of Various Thermal Upscat- tering Acceleration Schemes for Massively Parallel Transport Sweeps
-
Ghaddar, T., & Ragusa, J.
(2017).
An Approach for Load Balancing Massively Parallel Transport Sweeps on Unstructured Grids
-
Prince, Z., & Ragusa, J.
(2017).
Multiphysics Core Dynamics Simulation Using the Improved Quasi-Static Method
-
Prince, Z. M., Ragusa, J. C., & Wang, Y.
(2016).
Implementation of the improved quasi-static method in rattlesnake/moose for time-dependent radiation transport modelling. 1771-1785.
-
Prince, Z. M., & Ragusa, J. C.
(2016).
Improved quasi-static method with step doubling time adaptation. Transactions of the American Nuclear Society.
1383-1384.
-
Scott, L. M., Bays, S. E., & Ragusa, J. C.
(2016).
Local doppler broadening effects from thermal neutrons during transient testing. Transactions of the American Nuclear Society.
1385-1388.
-
Maginot, P. G., Ragusa, J. C., & Morel, J. E.
(2015).
A non-negative, non-linear, Petrov-Galerkin method for bilinear discontinuous differencing of the S
N equations. 388-399.
-
Hansel, J., Ragusa, J., & Guermond, J. L.
(2015).
An explicit, positivity-preserving flux-corrected transport scheme for the transport equation using continuous finite elements. 347-361.
-
Delchini, M. O., Ragusa, J. C., Berry, R. A., Andrs, D., & Martineau, R.
(2015).
Application of the reactor system code RELAP-7 to single-and two-phase flow water-hammer problems. 1267-1278.
-
Peterson, J. R., Hammer, H. R., Morel, J. E., Ragusa, J. C., & Wang, Y.
(2015).
Conservative nonlinear diffusion acceleration applied to the unweighted least-squares transport equation in MOOSE. 636-648.
-
Hackemack, M. W., & Ragusa, J. C.
(2014).
A DFEM formulation of the diffusion equation on arbitrary polyhedral grids. Transactions of the American Nuclear Society.
695-698.
-
Delchini, M. O., Ragusa, J. C., & Berry, R. A.
(2014).
Application of the entropy viscosity method to the 1-D 7-equation model for two-phase flows. Transactions of the American Nuclear Society.
1523-1526.
-
Delchini, M. O., Ragusa, J. C., & Berry, R. A.
(2014).
Extension of the entropy viscosity method to the Iow-Mach regime for the multi-dimensional euler equations. Transactions of the American Nuclear Society.
693-694.
-
Ghaddar, T., & Ragusa, J. C.
(2014).
Mesh generation for transport sweeps using a piece-wise linear discontinuous discretization. Transactions of the American Nuclear Society.
211-212.
-
Maginot, P. G., Ragusa, J. C., & Morel, J. E.
(2013).
Characterization of high order spatial discretizations and lumping techniques for discontinuous finite element SN transport. 2327-2338.
-
Peterson, J. R., Morel, J. E., & Ragusa, J. C.
(2013).
Exponentially-convergent Monte Carlo for the 1-D transport equation. 1441-1451.
-
Bruss, D. E., Morel, J. E., & Ragusa, J. C.
(2013).
S2SA preconditioning for the Sn equations with strictly nonnegative spatial discretization. 2373-2384.
-
Hackemack, M. W., Ragusa, J. C., Griesheimer, D. P., & Pounders, J. M.
(2013).
A Monte Carlo implementation of the predictor-corrector Quasi-Static method. 1953-1964.
-
Turcksin, B., & Ragusa, J. C.
(2013).
A diffusion synthetic acceleration scheme for rectangular geometries based on bilinear discontinuous finite elements. 2702-2712.
-
Hansel, J. E., Ragusa, J. C., Allu, S., Berrill, M. A., & Clarno, K. T.
(2013).
Analysis of physics-based preconditioning for single-phase subchannel equations. 2040-2051.
-
Delchini, M. O., Ragusa, J. C., & Berry, R. A.
(2013).
Entropy viscosity method applied to euler equations. 2217-2228.
-
Hamilton, S., Clarno, K., Berrill, M., Evans, T., Davidson, G., Lefebvre, R., ... Josey, C.
(2013).
Multiphysics simulations for LWR analysis. 1797-1808.
-
McDeavitt, S. M., Garcia, C., Ragusa, J. C., Smith, J., & Malone, J.
(2013).
Behavior assessments for UO
2 -BEO enhanced conductivity fuel in a PWR. 1161-1166.
-
Fredette, N., Ragusa, J., & Bangerth, W.
(2012).
Noninvasive cross section reconstruction with tranport theory constraints. 3595-3604.
-
Bruss, D. E., Morel, J. E., & Ragusa, J. C.
(2012).
S2SA preconditioning for the S
n equations with strictly positive spatial discretization. Transactions of the American Nuclear Society. 486-489.
-
Tsvetkov, P., Chirayath, S., Ragusa, J., McDeavitt, S., Gariazzo, C., Johns, J., ... Rochau, G. E.
(2011).
High temperature super-critical CO
2 -cooled integrated multi-modular thermal reactor. Transactions of the American Nuclear Society. 1117-1119.
-
Dugan, K., Ragusa, J. C., & Lebrun-Grandi, D.
(2011).
Hp-FEM automatic-mesh adaptivity applied to two dimensional neutron diffusion. Transactions of the American Nuclear Society.
506-507.
-
Chirayath, S., Tsvetkov, P., Ragusa, J., Skoda, R., & Gariazzo, C.
(2011).
Methodology for public safety, proliferation, and economics assessment of SMRs. Transactions of the American Nuclear Society.
1078-1079.
-
Lebrun-Grandi, D., & Ragusa, J. C.
(2011).
Simulation of thermo-mechanical contact between fuel pellet and cladding in UO2 nuclear fuel rods. Transactions of the American Nuclear Society.
526-528.
-
Zhang, Y., & Ragusa, J. C.
(2011).
ADVANCED MOX AND IMF FUEL ASSEMBLY DESIGNS FOR MULTI-RECYCLING TRANSURANICS. 879-885.
-
McDeavitt, S. M., Naramore, M., Ragusa, J., Revankar, S. T., Solomon, A. A., & Malone, J.
(2010).
Evaluation of high thermal conductivity oxide nuclear fuel concept containing beryllium. 621-625.
-
McDeavitt, S. M., Naramore, M., Miller, R., Ragusa, J. C., Revankar, S. T., Solomon, A. A., & Malone, J.
(2010).
Introducing a high thermal conductivity UO
2 -BeO nuclear fuel concept. Transactions of the American Nuclear Society. 273-274.
-
Lebrun-Grandi, D., Ragusa, J. C., & Turcksin, B.
(2010).
Method of Manufactured Solutions for a 2-D neutronics/heat conduction test case with adaptive multimesh hp-FEM. Transactions of the American Nuclear Society.
795-796.
-
Ragusa, J. C., McDeavitt, S. M., & Naramore, M.
(2010).
Neutronic evaluation of high thermal conductivity UO2-BeO fuel. Transactions of the American Nuclear Society.
761-762.
-
Mahadevan, V. S., & Ragusa, J. C.
(2010).
Uncertainty quantification of coupled problems in reactor analysis. Transactions of the American Nuclear Society.
381-382.
-
Ragusa, J., & Wang, Y.
(2010).
Adaptive mesh refinement techniques for diffusion-synthetic-accelerated discrete-ordinates neutral particle transport. Il Nuovo Cimento C - Colloquia on Physics.
215-222.
-
Bingham, A., Bradley, B., Zhang, Y., Ragusa, J., Chirayath, S., & Vierow, K.
(2009).
Analysis of advanced fuel assemblies for the LWRs. Transactions of the American Nuclear Society.
133-134.
-
Wang, Y., & Ragusa, J. C.
(2009).
A P1 conforming DSA scheme for DGFEM SN transport. 1028-1034.
-
Maginot, P., Morel, J., & Ragusa, J.
(2009).
A positive non-linear closure for the SN equations with linear-discontinous spatial differencing. 2539-2546.
-
Sternat, M., & Ragusa, J. C.
(2009).
Cross section inference based on PDE-constrained optimization. 3146-3154.
-
Trahan, T., Ragusa, J., & Morel, J.
(2009).
Galerkin-quadratures for the S
N method in 2D cartesian geometries and application to forward-peaked scattering particle transport problems. 1741-1750.
-
Wang, Y., & Ragusa, J. C.
(2009).
Goal-oriented h-type adaptive mesh refinement for the SN neutron transport equation solved with DGFEM. Transactions of the American Nuclear Society.
399-401.
-
Turcksin, B., & Ragusa, J. C.
(2009).
Goal-oriented mesh adaptivity for multi-dimension SP
N equations. 3115-3123.
-
Turcksin, B., & Ragusa, J. C.
(2009).
Spatial adaptivity for time-dependent diffusion problems. 1949-1955.
-
Mahadevan, V., Ragusa, J. C., & Mousseau, V.
(2009).
Verification of multiphysics software: Space and time convergence studies for nonlinearly coupled applications. 1608-1617.
-
Wang, Y., & Ragusa, J. C.
(2008).
An algorithm for multi-mesh and multi-irregularity from adaptive mesh refinement with FEM. Transactions of the American Nuclear Society.
326-327.
-
Chirayath, S., Metcalf, R., Ragusa, J., & Nelson, P.
(2008).
Assessment of proliferation resistance requirements for fast-reactor fuel-cycle facilities. 131-142.
-
Tsvetkov, P., Vierow, K., Peddicord, K., Ragusa, J., McDeavitt, S., Poston, J., Shao, L., & Willems, G.
(2008).
Autonomous multi-purpose floating power system with a compact static pebble bed reactor. 1571-1576.
-
Mahadevan, V., & Ragusa, J.
(2008).
Novel hybrid scheme to compute several dominant eigenmodes for reactor analysis problems. 1078-1085.
-
Rogers, T., Ragusa, J., Schultz, S., & Clair, R. S.
(2008).
PWR fuel assembly optimization using simulated annealing with translat. Transactions of the American Nuclear Society.
723.
-
Wang, Y., Ragusa, J. C., Dehart, M. D., & Clarno, K. T.
(2008).
Progress in the integration of the 2d dg-fem s
n transport solver xuthus into SCALE. Transactions of the American Nuclear Society. 750-752.
-
Metcalf, R., Ragusa, J., & Bean, R.
(2008).
Safeguards envelope: The first steps. 181-189.
-
Wang, Y., Ragusa, J., & DeHart, M.
(2008).
Xuthos: A discontinuous galerkin transport solver for NEWT based on unstructured triangular meshes. 470-476.
-
Sagdeev, R., Tsvetkov, P., Sadowski, W., Maldonado, G., Kritz, A., Gehin, J., ... DeHart, M.
(2008).
Development of a joint US-RF educational program in advanced energy technologies. Transactions of the American Nuclear Society.
775-776.
-
Vierow, K., Best, F., Ford, J., Hassan, Y., McDeavitt, S., Ragusa, J., ... Tsvetkov, P.
(2008).
TAMU Nuclear safety curriculum development for a 21stcentury workforce. Transactions of the American Nuclear Society.
771-772.
-
Bradley, B., & Ragusa, J.
(2008).
Plutonium and minor actinides transmutation in standard PWRs fuel assemblies. Transactions of the American Nuclear Society.
676.
-
Wang, Y., & Ragusa, J. C.
(2007).
Adaptive mesh refinement applied to the multi-dimensional, multi-group, SP
N equations with marshak boundary condition treatment. Transactions of the American Nuclear Society. 639-641.
-
Mahadevan, V., & Ragusa, J.
(2007).
Application of high-order implicit schemes for nonlinear multi-physics simulations
-
Yaqi, W., & Ragusa, J.
(2007).
Goal-oriented hp-Mesh adaptation for 1-D multigroup diffusion equations
-
Yaqi, W., & Ragusa, J.
(2007).
Multi-dimensional automatic mesh refinement for the multigroup SPN equations
-
Siegel, A., Tautges, T., Caceres, A., Kaushik, D., Fischer, P., Palmiotti, G., Smith, M., & Ragusa, J.
(2007).
Software design of SHARP
-
Wang, Y., & Ragusa, J. C.
(2006).
Adaptive automated solution of the multi-group diffusion equations
-
Mahadevan, V. S., & Ragusa, J. C.
(2006).
Consistent accelerated schemes for nonlinear coupling problems in reactor analysis
-
Thoreson, G., Ragusa, J. C., & Bangerth, W.
(2006).
Some advances on inverse particle transport problems with applications to homeland security. Transactions of the American Nuclear Society.
534-537.
-
Wang, Y., & Ragusa, J. C.
(2005).
Adaptive hp- Mesh refinement applied to 1-D, one-group diffusion problems. Transactions of the American Nuclear Society.
585-587.
-
Ragusa, J. C.
(2005).
Application of duality principles to solve inverse particle transport problem: A framework. Transactions of the American Nuclear Society.
427-429.
-
Ragusa, J. C.
(2004).
Adaptive solution of the multigroup diffusion equation on irregular structured grids using a conforming finite element method formulation. 1459-1468.
-
Ragusa, J. C.
(2004).
3-D block incomplete preconditioner for the primal and mixed-primal finite element solvers of CRONOS-2. Transactions of the American Nuclear Society.
467-468.
-
Cuadra, A., Ragusa, J., Downar, T., & Ivanov, K.
(2002).
Analysis of a CRDM Nozzle Break LOCA Without Scram Using the U.S. NRC Coupled Code TRAC-M/PARCS. 365-374.
-
Morelova, N., Kriventsev, V., Fiorina, C., Clifford, I., Kelm, S., Lorenzi, S., ... Forget, B.
(2023).
IAEA Initiative on Open-Source Nuclear Codes for Reactor Analysis. The Proceedings of the International Conference on Nuclear Engineering (ICONE).
1639-1639.
-
patent
-
Solomon, A., Kuchibhotla, H., Revankar, S., Mcdeavitt, S., & Ragusa, J.
(2016).
Ceramic-ceramic composites and process therefor, nuclear fuels formed thereby, and nuclear reactor systems and processes operated therewith
-
Solomon, A., Kuchibhotla, H., Revankar, S., Mcdeavitt, S., & Ragusa, J.
(2016).
Ceramic-ceramic composites and process therefor, nuclear fuels formed thereby, and nuclear reactor systems and processes operated therewith
Research
principal investigator on
- Texas Engineering Experiment Station Fellowship and Scholarship Support awarded by United States Department of Energy - (Washington D.C., District of Columbia, United States) 2009 - 2022
- Models with Multiple Levels of Fidelity, Tractability, and Computational Cost for Nuclear Weapon Radiation Effects awarded by United States Department of Defense - (Washington D.C., District of Columbia, United States) 2018 - 2021
- Texas A&M University Undergraduate Scholarship Nuclear Program awarded by United States Nuclear Regulatory Commission - (Rockville, Maryland, United States) 2018 - 2020
- NuSTEM: Nuclear Science, Technology and Education for Molten Salt Reactors awarded by United States Department of Energy - (Washington D.C., District of Columbia, United States) 2017 - 2020
- TAMU Nuclear Engineering Graduate Fellowship Program awarded by United States Nuclear Regulatory Commission - (Rockville, Maryland, United States) 2013 - 2020
co-principal investigator on
Teaching
teaching activities
- NUEN301 Nuclear Reactor Theory Instructor
- NUEN302 Intro To Nuen Ii Instructor
- NUEN329 Analyt And Num Method Instructor
- NUEN418 Fuel Assm 3d Core Design Instructor
- NUEN485 Directed Studies Instructor
- NUEN491 Hnr-research Instructor
- NUEN618 Multiphys Comp Nucl Sci Instructor
- NUEN647 Uncertainty Quant For Nuen Instructor
- NUEN684 Professional Internship Instructor
- NUEN684 Professional Internship:in-ab Instructor
- NUEN685 Directed Studies Instructor
- NUEN689 Sptp: Modeling For Eng Systems Instructor
- NUEN689 Sptp: Sci Large Scale Sim In N Instructor
- NUEN691 Research Instructor
- NUEN691 Research: In-ab Instructor
Works By Students
chaired theses and dissertations
-
Bruss, Donald (2012-05). DSA Preconditioning for the S_N Equations with Strictly Positive Spatial Discretization.
-
Bruss, Donald Eugene (2016-07). Adjoint-Based Uncertainty Quantification for Neutron Transport Calculations.
-
Chambers, Alex (2011-08). Multi-Recycling of Transuranic Elements in a Modified PWR Fuel Assembly.
-
Chance, Christopher (2014-09). Partial Core Blockage Simulation Using COBRA-TF.
-
Delchini, Marc (2014-10). Extension of the Entropy Viscosity Method to the Multi-D Euler Equations and the Seven-Equation Two-Phase Model.
-
Delchini, Marc Olivier (2010-05). A Preliminary Study to Assess Model Uncertainties in Fluid Flows.
-
Dugan, Kevin (2013-06). Dynamic Adaptive Multimesh Refinement for Coupled Physics Equations Applicable to Nuclear Engineering.
-
Fredette, Nathaniel (2011-12). Imaging Heterogeneous Objects Using Transport Theory and Newton's Method.
-
Ghaddar, Tarek Habib (2016-04). Load Balancing Unstructured Meshes for Massively Parallel Transport Sweeps.
-
Hackemack, Michael Wayne (2013-04). Characterization of a Stochastic Procedure for the Generation and Transport of Fission Fragments within Nuclear Fuels.
-
Hackemack, Michael Wayne (2016-06). Higher-Order DGFEM Transport Calculations on Polytope Meshes for Massively-Parallel Architectures.
-
Hansel, Joshua Edmund (2013-04). Solution Techniques for Single-Phase Subchannel Equations.
-
Hansel, Joshua Edmund (2016-07). Application of the Entropy Viscosity Method and the Flux-Corrected Transport Algorithm to Scalar Transport Equations and the Shallow Water Equations.
-
Lebrun-Grandie, Damien Thomas (2014-03). Contact Detection and Constraints Enforcement for the Simulation of Pellet/Clad Thermo-Mechanical Contact in Nuclear Fuel Rods.
-
Maginot, Peter G (2015-07). Higher Order Discontinuous Finite Element Methods for Discrete Ordinates Thermal Radiative Transfer.
-
Maginot, Peter Gregory (2010-12). A Nonlinear Positive Extension of the Linear Discontinuous Spatial Discretization of the Transport Equation.
-
Mahadevan, Vijay Subramaniam (2010-08). High Resolution Numerical Methods for Coupled Non-linear Multi-physics Simulations with Applications in Reactor Analysis.
-
McDermott, Patrick 1987- (2012-11). Thermal-Hydraulic Analysis of Seed-Blanket Unit Duplex Fuel Assemblies with VIPRE-01.
-
Metcalf, Richard R. (2009-05). New Tool for Proliferation Resistance Evaluation Applied to Uranium and Thorium Fueled Fast Reactor Fuel Cycles.
-
Naramore, Michael J (2010-08). High Thermal Conductivity UO2-BeO Nulcear Fuel: Neutronic Performance Assessments and Overview of Fabrication.
-
Peterson, Jacob Ross (2014-04). Exponentially-convergent Monte Carlo for the One-dimensional Transport Equation.
-
Prince, Zachary Merritt (2017-04). Improved Quasi-Static Methods for Time-Dependent Neutron Diffusion and Implementation in Rattlesnake.
-
Rogers, Timothy James (2008-08). Pwr fuel assembly optimization using adaptive simulated annealing coupled with translat.
-
Smith, Joshua 1987- (2012-12). Enhanced Thermal Conductivity UO2-BeO Nuclear Fuel: Neutronic Performance Studies and Economic Analyses.
-
Sternat, Matthew Ryan (2009-12). Application of a Constrained Optimization Technique to the Imaging of Heterogeneous Objects Using Diffusion Theory.
-
Turcksin, Bruno 1985- (2012-11). Acceleration Techniques for Discrete-Ordinates Transport Methods with Highly Forward-Peaked Scattering.
-
Wang, Yaqi (2006-12). hp-mesh adaptation for 1-D multigroup neutron diffusion problems.
-
Wang, Yaqi (2009-05). Adaptive Mesh Refinement Solution Techniques for the Multigroup SN Transport Equation Using a Higher-Order Discontinuous Finite Element Method.
-
Webster, Jennifer B (2013-07). Cost-Sensitive Classification Methods for the Detection of Smuggled Nuclear Material in Cargo Containers.
-
Zhang, Yunhuang (2009-12). Transmutation of Transuranic Elements in Advanced MOX and IMF Fuel Assemblies Utilizing Multi-recycling Strategies.
-
Zhang, Yunhuang (2014-08). Even-Parity S_(N) Adjoint Method Including SP_(N) Model Error and Iterative Efficiency.
Background
education and training
- Ph.D. in Nuclear Engineering, Grenoble Institute of Technology - (Grenoble, France) 2002
- D.E. in Nuclear Engineering, Grenoble Institute of Technology - (Grenoble, France) 1996
- M.S. in Nuclear Engineering, Texas A&M University - (College Station, Texas, United States) 1996
Contact
first name
- Jean
has last name
- Ragusa
mailing address
-
Texas A&M University
Nuclear Engineering
3133 TAMU
College Station, TX 77843-3133
USA
Other
- jean.ragusa@tamu.edu