Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 54 for “"Advanced Nuclear"”.
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Radiation Effects on Thermal Properties of Advanced Nuclear Materials
… for the advancement of next-generation nuclear systems operating in high-flux neutron and gamma environments. Zirconium hydride (ZrH) and yttrium hydride (YH) have emerged as promising neutron moderating materials due to their exceptional hydrogen density leading to superior moderating …
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Multi-physics modelling of liquid metals in Advanced Nuclear Systems
L'abstract è presente nell'allegato / the abstract is in the attachment
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Containment building : architecture between the city and advanced nuclear reactors
Since the inception of nuclear energy research, the element thorium (Th) has been considered the superior fuel for nuclear reactions because of its potency, safety, abundance and reduced waste. Cold War agendas broke from the logic of efficient energy production to establish a nationwide network of …
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An Investigation of Major Component Disposal Costs for Advanced Nuclear Reactors
… is an important aspect for decommissioning of Nuclear Power Plants (NPPs) that requires an understanding of the characteristics of the waste forms. The costs of disposal depend on the activity, volume, dose rate and waste handling/packaging. The U.S. average nuclear reactor age is 40 years old, …
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Hydrogen : what fuel cell vehicles and advanced nuclear reactors have in common
… fuel cell vehicles among the new, more-efficient advanced vehicle technologies. Our analysis indicates that fuel cell vehicles using hydrogen from fossils fuels offer no significant energy efficiency advantage over hybrid vehicles in urban driving cycle. Therefore, there is a strong justification …
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Dynamic analysis and control system design for an advanced nuclear gas turbine power plant
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990.
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Materials Design for Advanced Nuclear Energy Systems: Refractory High Entropy Alloys and Metallic Multilayer Composites
Advanced nuclear reactors present a multitude of materials challenges due to high op- erating temperatures, corrosive environments, and neutron radiation damage. In this thesis, I focus on two approaches to designing better materials for advanced reactors, high entropy alloys (HEAs) and metallic …
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High energy x-ray diffraction microstructural analysis of oxide dispersion strengthened steel for advanced nuclear systems
… one of most promising structural materials for advanced nuclear systems. In this study, we applied the high-energy synchrotron radiation technique to investigate the fundamental deformation process of a 9Cr ODS steel. The 9Cr ODS steel was fabricated by mechanical alloying, hot isostatic …
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An integrated methodology for quantitative assessment of proliferation resistance of advanced nuclear systems using probabilistic methods
… to evaluate proliferation resistance of nuclear energy systems is outlined and demonstrated focusing upon the proliferation competition. The methodology consists of four steps: actor characterization, proliferation competition model development, model input evaluation, and pathway …
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Pathways and frameworks for the licensing and regulation of advanced nuclear reactors in the United States
Nuclear regulation lies at the nexus of public policy, business, and engineering. While current regulatory processes have become fairly effective for the regulation of existing nuclear power plants, the use of prescriptive technology-specific requirements may present a challenge for the licensing …
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Role of nitrogen in the structure and properties of proton irradiated 12Cr1MoWV ferritic/martensitic steel for advanced nuclear reactor cores, The
… HT9 is a candidate material for fuel cladding in advanced nuclear reactors, such as the Versatile Test Reactor, currently under development. As such, understanding the relationship between microstructure and mechanical properties in the context of irradiation environments for these steels is …
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Analyzing the proliferation resistance of advanced nuclear fuel cycles : in search of an assessment methodology for use in fuel cycle simulations
… to assess proliferation resistance of advanced nuclear energy systems is investigated. The framework, based on Multi-Attribute Utility Theory (MAUT), is envisioned for use within early-stage fuel cycle simulations. Method assumptions and structure are explained, and reference technology …
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Development and use of advanced nuclear diagnostics and neural networks to diagnose 3D morphology and power balance in inertial fusion implosions at OMEGA and NIF
… fusion (ICF) is one of several ways to perform nuclear fusion in the laboratory, and is thus appealing as a potential future energy source. Achieving high gain at ICF facilities like the National Ignition Facility (NIF) and OMEGA requires new ways of measuring implosion conditions such as the …
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Advanced characterizations of austenitic oxide dispersion-strengthened (ODS) steels for high-temperature reactor applications
Future advanced nuclear systems involve higher operation temperatures, intenser neutron flux, and more aggressive coolants, calling for structural materials with excellent performances in multiple aspects. Embedded with densely and dispersedly distributed oxide nanoparticles that are capable of not …
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Evaluation of material attractiveness to non-state actors of various nuclear materials in Thorium fuel cycles
Thorium-based fuel cycles for advanced nuclear reactors have been explored to utilize thorium resources in nations where uranium is scarce, increase fissile material utilization, and enhance proliferation resistance. As a stepping stone, thorium-based fuels have been paired with pressure tube heavy …
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Accelerated atomistic prediction of structure, dynamics and material properties in molten salts
Various advanced nuclear reactors including fluoride high-temperature salt-cooled reactors (FHRs), molten salt reactors (MSRs) and fusion devices have proposed to use molten salt coolants. However, there remain many uncertainties in the chemistry, dynamics and physicochemical properties of many …
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Characterization of Uranium Carbide Microspheres In An Inert Zirconium Carbide Matrix For Gas Fast Reactors
<p>The characterization of an advanced nuclear fuel for Gas Fast reactors has been studied. Portions of a dispersion/composite fuel involving Uranium Carbide (UC) and Zirconium Carbide (ZrC) have been characterized and studied. Uranium carbide (UC) microspheres produced in the USC-Nuclear Materials …
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The potential for a nuclear renaissance : the development of nuclear power under climate change mitigation policies
… change it for centuries if no action is taken. Nuclear power, a nearly carbon-free source of electricity, could contribute significantly to climate change mitigation by replacing conventional fossil-fueled electricity generation technologies. To examine the potential role of nuclear power, an …
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The Future of the U.S. Nuclear Attack Submarine and the Preservation of the Submarine Industrial Base
… analyzes the future role and utility of the nuclear-powered attact submarine and the concomitant requirement for the Navy's New Nuclear Attack Submarine (NSSN) program and the need to preserve the submarine industrial base. An investigation of the Navy's emerging doctrine on the employment of …
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Investigation of the pool boiling heat transfer enhancement of nano-engineered fluids by means of high-speed infrared thermography
… space heat-transfer systems, and advanced nuclear reactors. This study critically examined the fundamental processes occurring during nucleate boiling, critical heat flux, and rewetting on thin-film heating elements. A significant focus of the work was to investigate and explain …
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