Index Catalog // ScholarsArchive@OSU

Investigation of Drag Coefficient and Virtual Mass Coefficient on Rising Ellipsoidal Bubbles

Creator:: Dueñas, Alexander M.
Abstract:: Accurately describing drag and virtual mass forces in two-phase flows is crucial for high fidelity modeling of nuclear thermal hydraulic safety systems. This study compares existing drag coefficient correlations commonly used in computational fluid dynamics (CFD) applications for air bubbles to experimental data collected for ellipsoidal air bubbles of varying...
Resource Type:: Masters Thesis

Investigation Into the Use of a Lead Slowing Down Spectrometer for Neutron Cross Section Analysis

Creator:: Keppen, Jackson D.
Abstract:: A lead slowing-down spectrometer (LSDS) was modeled in the hopes of beginning a nuclear data development campaign at Oregon State University. An LSDS can be used for neutron interrogation techniques, such as determining isotopic inventory of a sample of unknown components or determining the cross section of a sample of...
Resource Type:: Honors College Thesis
Full Text:: State’s School of Nuclear Science and Engineering Haori Yang, Committee Member, representing Oregon

Incorporating statistical uncertainty into nuclear material diversion pathway analysis using probabilistic risk assessment

Creator:: Pharn, Benjamin T.
Abstract:: A Level 1 probabilistic risk assessment (PRA) is applied to a plutonium button-making process, but in regards to the risk of diversion (or theft) of special nuclear material (SNM) rather than the risk of mechanical failure. The main objective of the project was to identify the relative vulnerability of areas...
Resource Type:: Masters Thesis

Commissioning of the NDDL-40 Neutron Detection System at Oregon State University

Creator:: Boulton, Nicholas M.
Abstract:: The Neutron radiography facility (NRF) at Oregon State University (OSU) has been modified to begin working on the non-destructive evaluation of concrete materials to study the early stages of shrinkage, cracking, and water transport of concrete during the curing process. The objective of this work is to investigate the efficiency...
Resource Type:: Masters Thesis

Cost-Benefit Analysis : Proposed Safety Upgrades to Currently Operating Nuclear Power Plants

Creator:: Jordahl, Jonathan T.
Abstract:: In the wake of nuclear accidents such as Three Mile Island Unit 2 and Fukushima, the nuclear power industry’s safety record is scrutinized. Today the main concerns lies with hydrogen production in a nuclear reactor core when the zirconium fuel cladding reacts with the water coolant during an accident, creating...
Resource Type:: Masters Thesis

Special Nuclear Material Analysis Using Temporal Gamma-Ray Spectroscopy and Machine Learning Methods

Creator:: Curtis, Jessica R.
Abstract:: Following thermal neutron induced fission, supervised machine learning and temporal gamma-ray spectroscopy methods were used to identify differences in the delayed gamma-ray spectra of Pu-239 and U-235. The temporal gamma-ray spectroscopy method takes advantage of the time-dependent decay of fission products. Employing Spearman's rank-order correlation coefficient and without prior knowledge...
Resource Type:: Masters Thesis

A Beta-Gamma Radioxenon Detection System using Ultra-Bright Inorganic Scintillators and Solid State Detectors

Creator:: Czyz, Steven A.
Abstract:: The atmospheric detection of four radioxenon isotopes (131mXe, 133mXe, 133Xe, and 135Xe) released during a nuclear detonation is a key tool utilized by the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) to identify clandestine nuclear weapon testing activity. These radioxenon isotopes all decay via the near-simultaneous release of an electron and a...
Resource Type:: Dissertation
Full Text:: frustrating and involved data analysis. My doctoral committee: Dr. Kenneth Krane, Dr. Haori Yang

Special Nuclear Material Classification and Mass Content Estimation Using Temporal Gamma-Ray Spectroscopy and Machine Learning Methods

Creator:: Curtis, Jessica R.
Abstract:: Improving the methods used for the detection and estimation of fissile material mass content is essential to nuclear security and safeguards to ensure special nuclear material (SNM) accountability, control, safety and security. With the continued expansion of the nuclear industry and the need for safe management of spent fuel, improving...
Resource Type:: Dissertation

Feasibility of Enrichment Measurements with a Pixelated CdTe HEXITEC Detector: A Comparison of Methods

Creator:: Kasparek, Dustin
Abstract:: The International Atomic Energy Agency (IAEA) is responsible for verifying the mass of elemental uranium in various forms (powders, pellets, scrap) as part of safeguards inspections at nuclear fuel fabrication facilities in support of the nuclear non-proliferation treaty. Current methods require in-field dissolution chemistry, which is time consuming and imposes...
Resource Type:: Masters Thesis

Pine Tree Dosimetry: Development of Geometric and Compositionally Specific Sectional Models for Organ Dose Assessment

Creator:: Condon, Caitlin A.
Abstract:: Ideally, dosimetric models for pine trees will accurately reflect the doses to its critical organs. However, existing models (e.g. that in ICRP 108) for the pine tree are over simplified or solely focused on estimating doses to one specific organ, and none of the existing models attempt dosimetry to the...
Resource Type:: Dissertation

ScholarsArchive@OSU

Investigation of Drag Coefficient and Virtual Mass Coefficient on Rising Ellipsoidal Bubbles

Investigation Into the Use of a Lead Slowing Down Spectrometer for Neutron Cross Section Analysis

Incorporating statistical uncertainty into nuclear material diversion pathway analysis using probabilistic risk assessment

Commissioning of the NDDL-40 Neutron Detection System at Oregon State University

Cost-Benefit Analysis : Proposed Safety Upgrades to Currently Operating Nuclear Power Plants

Special Nuclear Material Analysis Using Temporal Gamma-Ray Spectroscopy and Machine Learning Methods

A Beta-Gamma Radioxenon Detection System using Ultra-Bright Inorganic Scintillators and Solid State Detectors

Special Nuclear Material Classification and Mass Content Estimation Using Temporal Gamma-Ray Spectroscopy and Machine Learning Methods

Feasibility of Enrichment Measurements with a Pixelated CdTe HEXITEC Detector: A Comparison of Methods

Pine Tree Dosimetry: Development of Geometric and Compositionally Specific Sectional Models for Organ Dose Assessment

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