Nuclear Science and Engineering Institute electronic theses and dissertations (MU): Recent submissions
Now showing items 1-20 of 98
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Development of a novel titanium thermal ionization cavity source for electromagnetic radioisotope separation of samarium and other lanthanide isotopes
(University of Missouri--Columbia, 2022)An available supply of high specific activity radioisotopes was identified by the Department of Energy as a critical priority to the development and eventual deployment of next-generation medical diagnostic and cancer ... -
Novel methods of evaluating materials in extreme environments
(University of Missouri--Columbia, 2022)Three novel experiments were completed to investigate the difference in radiation response between production methods of Inconel 625. Production methods explored were the laser-powder bed fusion additive manufacturing ... -
Effects of beta radiation on nanostructured semiconductor devices for low energy radiation sensing
(University of Missouri--Columbia, 2021)Beta radiation detection currently relies primarily on scintillation detectors. However, the construction of these detectors tends to be large which significantly limits their applicability for field-use. A nanostructured ... -
Influence of inert gases on heat and mass transfer in next-generation nuclear reactors
(University of Missouri--Columbia, 2021)Inert gases cause some unique challenges in nuclear fuel development. In this dissertation, we study the impact of inert gases on the transport behavior in nextgeneration fission and fusion reactors. Uranium--molybdenum ... -
Phonons and thermal neutron scattering in [gamma]-U and U-Mo alloys
(University of Missouri--Columbia, 2020)Elimination of high-enrichment uranium fuels in research and test reactors around the world is one of the many efforts that supports the goal of minimizing proliferation risks. These efforts have pushed for the development ... -
Startup, transition core, and molybdenum-99 production upgrade analyses for low-enriched uranium fuel conversion at the University of Missouri research reactor
(University of Missouri--Columbia, 2020)Under the direction of the United States Department of Energy (DOE) National Nuclear Security Administration (NNSA) Office of Material Management and Minimization (M3) Reactor Conversion Program, the University of Missouri ... -
Computation of fission product deposition in aerosols
(University of Missouri--Columbia, 2019)[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI SYSTEM AT REQUEST OF AUTHOR.] High-temperature gas-cooled reactors (HTGRs) generate carbonaceous dust during both normal operations and accidents. The dust particles can be ... -
Simulation of multiple-component charged aerosol evolution
(University of Missouri--Columbia, 2019)The study of the nuclear source term requires the computation of aerosol dynamics. Solutions to the aerosol general dynamic equation (GDE) are difficult to obtain by analytical or numerical methods when more realistic ... -
Robust and efficient process for acceptance testing of radiation therapy machines
(University of Missouri--Columbia, 2015)The current (legacy) paradigm for acceptance testing (AT), commissioning, and ongoing quality assurance (QA) and quality control (QC) of linac and treatment planning systems (TPS) is extremely inefficient requiring substantial ... -
Direct simulation Monte Carlo for modeling spatially homogeneous multi-component aerosols
(University of Missouri--Columbia, 2018)Nuclear aerosols generated under normal operational and post-accident reactor environments are of particular importance in estimation of the nuclear source term. Several light water reactor aerosol containment experiments ... -
Mesh-free modeling of spatially inhomogeneous aerosols in arbitrary geometries
(University of Missouri--Columbia, 2018)Many issues affect the nuclear source term, one of which is the existence of aerosols. These aerosols are usually simulated with the assumption that they are spatially homogeneous. Making this assumption reduces complexity ... -
Development of unfolded fast neutron irradation positions at a 16.5 MeV GE PETtrace cyclotron and chronomorphic characterization of radiation damage on polyurethane
(University of Missouri--Columbia, 2018)[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI-COLUMBIA AT AUTHOR'S REQUEST.] The fast neutron energy flux spectrum was determined at a fluorine-18 ([subscript 18]F) producing cyclotron which is operated at the Missouri ... -
Comparative studies of fission fragment and electron beam driven solid-state lasers and reactor-laser system modeling
(University of Missouri--Columbia, 2018)A model for a Solid State Nuclear Pumped Laser (SSNPL) system was developed. The model consists of alternating layers of GaN, pure uranium metal, and diamond. The MCNP simulations are used to estimate the minimum core size ... -
Simulating Cherenkov radiation generated by radiotherapy beams
(University of Missouri--Columbia, 2017)Cherenkov radiation has had various applications in high-energy physics since its discovery, and this research explores two applications of Cherenkov radiation relating to its presence in media under irradiation by medical ... -
Uncertainty analysis of steady-state calorimetric emissivity measurements
(University of Missouri--Columbia, 2017)Determining the accuracy and uncertainty in total hemispherical emissivity data is important in the uncertainty quantification of predictive models using radiant heat transfer. Very High Temperatures Reactors (VHTR) are ... -
Scintillating fiber arrays for in-vivo real-time patient quality assurance for medical linear accelerators
(University of Missouri--Columbia, 2017)The purpose of this research is to design real-time, in-vivo, transmission scintillating fiber detectors capable of identifying errors in external beam radiation therapy when a fraction of a treatment has been delivered. ... -
Non-clinical uses of the Gamma Knife Perfexion : small animal irradiation and convolution algorithm evaluation
(University of Missouri--Columbia, 2017)The purpose of this project was two-fold. One, to test the accuracy and usefulness of a clinically unused dose calculation algorithm for the Leksell Gamma Knife Perfexion radiosurgery unit that accounts for heterogeneities ... -
3D imaging for brachytherapy patient and mold applicator positioning verification
(University of Missouri--Columbia, 2017)We developed a stereo vision method for 3D imaging of HDR brachytherapy skin cancer applicator positioning and tracking with respect to patients' anatomical features. The setup consists of two high-resolution scientific ... -
Helium segregation and migration behavior near symmetric tilt grain boundaries in tungsten
(University of Missouri--Columbia, 2018)Tungsten, one of the most important divertor materials in nuclear fusion devices, will be subject to high-flux helium plasma, which can lead to unexpected structural defects and irregular microstructure such as fuzz and ... -
Investigation of portable nuclear power systems
(University of Missouri--Columbia, 2014)[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Energy needs for modern society are an ever-changing and complex problem. One of the most diverse areas of energy needs is portable energy generation. ...