Browsing Electronic Theses, Dissertations, and Records of Study (2002– ) by Author "Ragusa, Jean C"
Now showing items 1-20 of 39
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Rodriguez, Jason (2022-12-08)The simulation of radiation neutron transport involves a complex system of partial differential equations. Methods in solving these systems of equations can be categorized into two areas of concern, stochastic and ...
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Hardy, Zachary (2022-04-13)This work develops a non-intrusive, equation-free reduced-order model (ROM) for parametric reactor kinetics simulations. Non-intrusive, equation-free ROMs have many distinctive advantages compared to their intrusive ...
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Halvic, Ian William (2022-10-06)This work presents a parametric, non-intrusive, data-driven reduced-order model (ROM) for parametric multigroup radiation transport. Full-order models (FOMs) for radiation transport are often costly in terms of computational ...
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Turcksin, Bruno 1985- (2012-11-28)In this dissertation, advanced numerical methods for highly forward peaked scattering deterministic calculations are devised, implemented, and assessed. Since electrons interact with the surrounding environment through ...
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Halvic, Ian William (2018-05-04)Adjoint methods can provide a first-order approximation of the response a physical system experiences due to a perturbation in the system’s parameters. However, when applying the method to time dependent transport, memory ...
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Bruss, Donald Eugene (2016-07-28)The accurate modeling of complex physical phenomena, such as radiation transport in a laboratory experiment or a nuclear reactor, challenges the limits of modern computing resources and helps drive the requirement for ...
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Franklin, Andrew Mark (2020-06-04)Surface-to-surface, blackbody radiation heat transfer is a fundamental phenomena essential in the evaluation of some heat conduction problems. Representing it in digital simulations is of interest in the nuclear power ...
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Hansel, Joshua Edmund (2016-07-22)The Flux-Corrected Transport (FCT) algorithm, in conjunction with the entropy viscosity method, was applied with the continuous finite element method to (a) a scalar transport equation that includes reaction and source ...
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Herring, James Dillon (2021-07-06)There is a need to improve the predictive capability of high-fidelity simulations of physical phenomena that include the transport of thermal radiation and/or other subatomic particles. There are many ingredients of improved ...
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Turner, Robert Franklin (2020-05-13)Numerical methods are often used to approximate the solutions to partial differential equations. Each problem may warrant the use of multiple numerical methods to solve for each domain over which the problem is posed. For ...
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Lebrun-Grandié, Damien Thomas (2014-03-05)As fission process heats up the fuel rods, UO2 pellets stacked on top of each other swell both radially and axially, while the surrounding Zircaloy cladding creeps down, so that the pellets eventually come into contact ...
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Dugan, Kevin (2013-06-21)The processes studied by nuclear engineers generally include coupled physics phenomena (Thermal-Hydraulics, Neutronics, Material Mechanics, etc.) and modeling such multiphysics processes numerically can be computationally ...
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Smith, Joshua 1987- (2012-10-30)The objective of this work was to continue the evaluation of the high thermal conductivity UO2-BeO (UBO) nuclear fuel. Current ceramic UO2 fuel offers many fuel performance benefits, but it has a low thermal conductivity. ...
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Zhang, Yunhuang (2014-08-10)In this Dissertation, we analyze an adjoint-based approach for assessing the model error of SP_(N) equations (low fidelity model) by comparing it against S_(N) equations (high fidelity model). Three model error estimation ...
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Tompkins, James Brandon (2016-06-17)The one megawatt TRIGA reactor at Texas A&M has various methods of irradiating samples, but one of the most unique dose positions is severely underutilized. This irradiation cell is a large space where samples may be placed ...
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Delchini, Marc (2014-10-13)The work presented in this dissertation focuses on the application of the entropy viscosity method to low-Mach single- and two-phase flow equations discretized using a continuous Galerkin finite element method with implicit ...
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Till, Andrew (2015-12-01)The standard multigroup (MG) method for energy discretization of the transport equation can be sensitive to approximations in the weighting spectrum chosen for cross-section averaging. As a result, MG often inaccurately ...
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Naramore, Michael J (2010-08-03)The objective of this work was to evaluate a new high conductivity nuclear fuel form. Uranium dioxide (UO2) is a very effective nuclear fuel, but it’s performance is limited by its low thermal conductivity. The fuel concept ...
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Higher Order Discontinuous Finite Element Methods for Discrete Ordinates Thermal Radiative Transfer Maginot, Peter G (2015-07-28)The linear discontinuous finite element method (LDFEM) is the current work horse of the radiation transport community. The popularity of LDFEM is a result of LDFEM (and its Q1 multi-dimensional extensions) being both ...
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Manolov, Sergiy (2013-03-14)In this thesis we investigate coupling and preconditioning techniques for 19D hybrid neutronics calculations. Each problem is represented by two spatial regions with Sn in one region and either Diffusion (P1) or P3 in the ...