Accelerator Facility Shielding Design, 2015 University of Tennessee - Knoxville
Accelerator Facility Shielding Design, Kaitlyn Hope Darby, Tucker Caden Mcclanaha, Adrian Moore, Christopher Tyler Crutcher, Melissa Alexis Megonigal
University of Tennessee Honors Thesis Projects
No abstract provided.
Citations Of Publications, 2015 Wroclaw University of Technology
Citations Of Publications, Wojciech M. Budzianowski
No abstract provided.
Fast Fission Neutron Detection Using The Cherenkov Effect, 2015 Clemson University
Fast Fission Neutron Detection Using The Cherenkov Effect, Matthew Millard
The Cherenkov effect in optically clear media of varying indices of refraction and composition was investigated for quantification of fast neutrons. The ultimate application of the proposed detection system is criticality monitoring. The optically clear medium, composed of select target nuclei, was coupled to a photomultiplier tube. Neutron reaction products of the target nuclei contained within the optical medium emit beta particles and gamma rays that produce Cherenkov photons within the medium which can be detected. Assessed media include quartz (SiO2), sapphire (Al2O3), spinel (MgAl2O4), and zinc sulfide (ZnS), which were irradiated with un-moderated 252Cf. Monte Carlo N-Particle (MCNP) code ...
Transformation Of Uranium In A Geological Environment, 2015 Clemson University
Transformation Of Uranium In A Geological Environment, Derrell Hood
Incorporation of uranium into iron oxide minerals is a promising mechanism for the environmental immobilization of U(VI). In this study, synthesized hematite was doped with uranium and analyzed with SEM-EDS, TEM, XRD, and ICP-MS. The results of this analysis strongly indicate uranium incorporation into the mineral, as well as the possible presence of a co-precipitated uranium mineral clarkeite. Preliminary results also shows an increase in the amount of uranium associated with the hematite particles as a function of mineral aging. Cyclic Voltammetry (CV) was used to induce and characterize electrochemical changes of uranium in the doped hematite system; these ...
C.V., 2015 Wroclaw University of Technology
C.V., Wojciech M. Budzianowski
No abstract provided.
Offer For The Economy, 2015 Wroclaw University of Technology
Offer For The Economy, Wojciech M. Budzianowski
No abstract provided.
Oferta Dla Gospodarki, 2015 Wroclaw University of Technology
Oferta Dla Gospodarki, Wojciech M. Budzianowski
No abstract provided.
Inżynieria Chemiczna Lab., 2015 Wroclaw University of Technology
Inżynieria Chemiczna Lab., Wojciech M. Budzianowski
No abstract provided.
Tematyka Prac Doktorskich, 2015 Wroclaw University of Technology
Tematyka Prac Doktorskich, Wojciech M. Budzianowski
No abstract provided.
Incorporating Public Perceptions Into The Selection Of A Nuclear Fuel Cycle, 2015 Virginia Commonwealth University
Incorporating Public Perceptions Into The Selection Of A Nuclear Fuel Cycle, John M. Swanson
Theses and Dissertations
The final disposal location for used nuclear fuel in the U.S. remains unresolved. A major complication in resolving this issue has historically been the lack of public acceptance. This motivates the creation of a decision making model for selecting a nuclear fuel cycle in the U.S. that incorporates the preferences of the public. A model based on the Analytic Hierarchy Process (AHP) was created, tested, and shown to be problematic in incorporating public opinion into decision objectives. A new model based on Multi-Attribute Utility Theory (MAUT) has been created. This model contains the fundamental objectives for both technical ...
Characterization Of Lithium-6 As A Commercial Helium-3 Alternative For Nuclear Safeguards And Security, 2014 University of Tennessee - Knoxville
Characterization Of Lithium-6 As A Commercial Helium-3 Alternative For Nuclear Safeguards And Security, Alexander Martin Okowita
Helium-3 detectors are efficient, reliable neutron detectors, but their high demand has reduced their supply to a very miniscule level, making them very expensive. The goal of this project is to test and evaluate an alternative produced by industry. Current testing is being done with a Lithium Zinc Sulfide (6LiF:ZnS(Ag)) detector from Aspect used in their portal monitors.
There are three basic requirements for neutron detectors used in nuclear safeguards and security: 1) high absolute detection efficiency, 2) maintaining neutron detection efficiency when simultaneously exposed to a high gamma ray exposure rate, and 3) the ability to ...
A Sensor For Oxygen In A Potassium-Sodium Alloy, 2014 University of Tennessee - Knoxville
A Sensor For Oxygen In A Potassium-Sodium Alloy, Michael George Pastis
This project supports a research project to determine the configuration for heat exchanger welds in a space reactor. The reactor is a sodium-potassium (NaK) cooled reactor for use on future missions on the lunar surface or on Mars. Various types of welds in Type 316L stainless steel have been positioned in a furnace which is part of a NaK test loop. The specimens are bathed in circulating NaK at 600 degrees centigrade.
Since the oxygen concentration in the NaK is a major factor in corrosion of the weld specimens, it must be carefully monitored and controlled. However, few techniques are ...
Modeling Integral Fuel Burnable Absorbers Using The Method Of Characteristics, 2014 University of Tennessee - Knoxville
Modeling Integral Fuel Burnable Absorbers Using The Method Of Characteristics, Erik Daniel Walker
Modern core designs that utilize Westinghouse fuel technology employ the use of Integral Fuel Burnable Absorbers (IFBA) that consists of very thin coatings of boron absorber material on the fuel pellets. While IFBA has proven to be an effective burnable absorber, it does present a neutronics modeling challenge. The difficulty of modeling IFBA using the Method of Characteristics (MOC) transport method is well known, and arises from the fact that IFBA is a very small, but also very important, region in nuclear fuel. Experience in modeling IFBA at the pin cell and single assembly lattice level requires a decrease in ...
A Study Of Energy Resolution And Non-Proportionality Of Yalo3:Ce And Gd3ga3al2o12:Ce, 2014 University of Tennessee - Knoxville
A Study Of Energy Resolution And Non-Proportionality Of Yalo3:Ce And Gd3ga3al2o12:Ce, Samuel Bradley Donnald
For many radiation detection applications, energy resolution is one of the most important detector characteristics. In well designed scintillation detectors, the energy resolution is primarily driven by two main factors - the light output and light yield non-proportionality. A great deal of research has already focused on understanding and improving the light yield of scintillation detectors; however, light yield non-proportionality is less well understood. Until recently, light yield non-proportionality was thought to be an intrinsic scintillator property with very little sample-to-sample variation. In this work, two materials have been investigated that demonstrate a variable light yield non-proportionality. The first material investigated ...
Automated Doppler Broadening Of Cross Sections For Neutron Transport Applications, 2014 University of Tennessee - Knoxville
Automated Doppler Broadening Of Cross Sections For Neutron Transport Applications, Shane William Daniel Hart
This dissertation discusses the research and development of new cross section temperature handling techniques for the SCALE computer code, which is developed and maintained at Oak Ridge National Laboratory. In particular, methods will be added to the KENO Monte Carlo code.
Areas of interest include: neutron scattering off of heavy isotopes in the epithermal energy range, implementation of Doppler pre-broadening of continuous energy one-dimensional cross-section data, implementation of interpolation on the continuous energy two-dimensional cross sections, and implementation of the direct S(A,B) [S alpha beta] method for thermal neutron scattering and interpolation on that data.
Accurate cross section ...
Thermodynamic Modeling Of Uranium And Oxygen Containing Ternary Systems With Gadolinium, Lanthanum, And Thorium, 2014 University of Tennessee - Knoxville
Thermodynamic Modeling Of Uranium And Oxygen Containing Ternary Systems With Gadolinium, Lanthanum, And Thorium, Jacob Wesley Mcmurray
The CALPHAD method is used to assess the thermodynamic properties and phase relations in the U-M-O system where M = Gd, La, and Th. A compound energy formalism (CEF) model for fluorite UO2±x [urania] is extended to represent the complex U1-yMyO2±x [urania solid solution] phases. The lattice stabilities for fictive GdO2 [gadolinia] and LaO2 [lanthana] fluorite structure compounds are calculated from density functional theory (DFT) for use in the CEF for U1-yMyO2±x [urania solid solution phase] while U6+ [uranium 6 plus cation] is introduced ...
Novel Deployment Of Elpasolites As A Dual Neutron / Gamma-Ray Directional Detector, 2014 University of Nevada, Las Vegas
Novel Deployment Of Elpasolites As A Dual Neutron / Gamma-Ray Directional Detector, Amber Lynn Guckes
UNLV Theses/Dissertations/Professional Papers/Capstones
At a time when upholding national security has never been more important, there exists a need for the advancement of radiation detection technologies. Neutron and photon detectors are essential to fulfilling mission areas including detection and localization of missing, stolen or smuggled radiological or nuclear materials, quantification of the effects of a radiological or nuclear event, and supporting nonproliferation efforts. The aim of this study was to evaluate a new radiation detector based on the scintillation elpasolite compound Cs2LiYCl6:Ce (CLYC) for simultaneous measurements of neutron and photon flux and the localization of radiation sources. Previous studies performed on the ...
Developing Professional Skills In Stem Students: Data Information Literacy, 2014 Purdue University
Developing Professional Skills In Stem Students: Data Information Literacy, Megan R. Sapp Nelson, Lisa Zilinski, Amy S. Van Epps
Libraries Faculty and Staff Scholarship and Research
Undergraduate STEM students are increasingly expected to have some data use skills upon graduation, whether they pursue post-graduate education or move into industry. This project was an initial foray into the application of data information literacy competencies to training undergraduate students to identify markers of data and information quality. The data consumer training appeared within two courses to help students evaluate data objects, including databases and datasets available on the Internet. The application of the Data Credibility Checklist provides a foundation for developing data reuse competencies. Based upon the initial presentation of the content, it became obvious that students need ...
Plutonium Worlds. Fast Breeders, Systems Analysis And Computer Simulation In The Age Of Hypotheticality, 2014 Leuphana University Lüneburg
Plutonium Worlds. Fast Breeders, Systems Analysis And Computer Simulation In The Age Of Hypotheticality, Sebastian Vehlken
This article examines the media history of one of the hallmark civil nuclear energy programs in Western Germany – the development of Liquid Metal Fast Breeder Reactor (LMFBR) technology. Promoted as a kind of perpetuum mobile of the Atomic Age, the "German Manhattan Project" not only imported big science thinking. In its context, nuclear technology was also put forth as an avantgarde of scientific inquiry, dealing with the most complex and 'critical' technological endeavors. In the face of the risks of nuclear technology, German physicist Wolf Häfele thus announced a novel epistemology of
"hypotheticality". In a context where traditional experimental engineering ...
Doube-Pulse Laser-Induced Breakdown Spectroscopy Of Multi-Element Sample Containing Low- And High-Z Analytes, Patrick J. Skrodzki, Jason R. Becker, Prasoon K. Diwakar Ph. D., Sivanandan S. Harilal Ph. D., Ahmed Hassanein Ph. D.
The Summer Undergraduate Research Fellowship (SURF) Symposium
Laser-induced breakdown spectroscopy (LIBS) is a portable, remote, non-invasive analytical technique which effectively distinguishes neutral and ionic species for a range of low- to high-Z elements in a multi-element target. Subsequently, LIBS holds potential in special nuclear material (SNM) sensing and nuclear forensics requiring minimal sample preparation and detecting isotopic shifts which allows for differentiation in SNM (namely U) enrichment levels. Feasible applications include not only nonproliferation and homeland security but also nuclear fuel prospecting and industrial safeguard endorsement. Elements of higher mass with complex atomic structures, such as U, however, result in crowded emission spectra with LIBS, and characteristic ...