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 23 for “"Advanced Reactors"”.
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Mechanical characterization of alloy 709 stainless steel after high temperature aging for application in advanced reactors
Sodium fast reactors are among the leading generation IV nuclear reactor designs being studied for future development. They will operate at higher temperatures and have higher neutron fluxes and thus require the use of novel materials. These materials will need to withstand an extreme environment, …
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Simulation of the nuclear fuel cycle with recycling : options and outcomes
… cycle, and the impact of different options for advanced reactors and fuel recycling facilities on the accumulation of the transuranics (TRU) inventory. Several aspects of the nuclear fuel cycle are studied for the US and for Brazil. This includes the impact of advanced nuclear technologies' …
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Pathways and frameworks for the licensing and regulation of advanced nuclear reactors in the United States
… a challenge for the licensing and deployment of advanced nuclear power plants. These advanced nuclear power plants can utilize passive systems, new fuel forms or coolants, or other new design features to accomplish their safety and security functions. Advanced reactors may not comply with …
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Investigation into the Processing Parameters of Phosphate-based Dechlorination of Electrorefiner Salt Waste
… be applied to waste from our current fleet or reactors, as well as advanced reactors in which pilot-scale facilities are currently being evaluated. In this study, a procedure was developed for the dechlorination of an electrorefiner salt waste simulant called ERV3 salt based on the results of …
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Fuel cycle transition simulation capabilities in CYCLUS
Recent interest in advanced reactors and the following need for techno-economic transitions has increased the demand for tools necessary to model complex nuclear fuel cycles (NFCs) and advanced reactor technologies. This thesis demonstrates the capability of CYCLUS , the agent-based fuel cycle …
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Risk-informed design guidance for a Generation-IV gas-cooled fast reactor emergency core cooling system
… must be considered during the design of an advanced reactor. However, an advanced reactor's core damage frequency dominates all other considerations at the preliminary stage of reactor design. An iterative four-step methodology to guide the MIT gas-cooled fast reactor emergency core cooling …
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The use for frequency-consequence curves in future reactor licensing
… plants has focused until now on Light Water Reactors and has not incorporated systematically insights and benefits from Probabilistic Risk Assessment (PRA). With the goal of making the licensing process more efficient, predictable and stable for advanced reactors, the U.S. Nuclear Regulatory …
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Assessment of Hybrid CFD Turbulence Model, STRUCT-epsilon, for Thermal Striping Behavior
Many advanced nuclear reactor designs are susceptible to thermal fatigue damage caused by thermal striping, which presently accepted modeling and design tools are unable to accurately or reliably predict the presence of. Advanced reactors are vital in achieving net-zero carbon electricity …
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Neutronic Analysis of Horizontal-Compact High Temperature Gas-cooled Reactor
… the significant cost challenges associated with advanced reactors, a 150MWt horizontal compact high temperature gas-cooled reactor (HC-HTGR) has been proposed. The HC-HTGR has potential to reduce the capital cost of a traditional vertical oriented HTGR by 20% through reduction in reactor building …
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Fuel cycle options for optimized recycling of nuclear fuel
… spent nuclear fuel depends on both deployment of advanced reactors that can be loaded with recycled transuranics (TRU), and on availability of the facilities that separate and reprocess spent fuel. Three recycling strategies are explored in this study: (1) Recycling in thermal Light 'Water …
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Deterministic casualty analysis of the Pebble Bed Modular Reactor for use with risk-based safety regulation
… process is also necessary in order to license advanced reactors that are not light water technology. Risk based reactor licensing, which uses the Probabilistic Risk Assessment (PRA) to justify most licensing questions, is a proposed replacement for the current methods. This work further …
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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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Integrated fuel performance and thermal-hydraulic sub-channel models for analysis of sodium fast reactors
Sodium Fast Reactors (SFR) show promise as an effective way to produce clean safe nuclear power while properly managing the fuel cycle. Accurate computer modeling is an important step in the design and eventual licensing of SFRs. The objective of this work was to couple a model for metal fuel …
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Development of a Supervisory Control System as a Transition Technology Towards Autonomous Reactor Plant Operations
The economic viability of small and microreactors depends on reducing energy generation costs. The implementation of autonomous reactor control systems provides an avenue for reducing operations and maintenance expenses. Advanced reactor designs with enhanced passive safety features, reduced source …
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Thermal Properties of Candidate Coolant Salts
With the increasing research on advanced reactors, molten salt reactors have been recognized for their potential. As with any advanced reactor concept, each component and material must be thoroughly investigated before any reactors of that type are created. One of the most pressing issues in MSR …
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Investigation of the impacts of deploying reactors fueled by high-assay low enriched uranium
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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Development of a Novel Fuel Burnup Methodology and Algorithm in RAPID and its Benchmarking and Automation
… has become more urgent for the simulation of advanced reactors and monitoring and safeguards of spent fuel pools. To this end, the Virginia Tech Transport Theory Group (VT3G) has been working on advanced computational tools for accurate modeling and simulation of nuclear systems in real-time. …
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A First Complete Approach to Address Model Error in Computational Turbulent Heat Transfer
… see as a crucial step enabling licensing of advanced reactors such as liquid metal cooled and molten salt cooled reactors.
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An Investigation of Major Component Disposal Costs for Advanced Nuclear Reactors
… NPP fleet is exclusively made of light water reactors and as such there are no detailed study of decommissioning for advanced reactors that are being developed for deployment. This work modelled activity and benchmarked the disposal costs for a Pressurized Water Reactor’s (PWR) components …
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Rotating Disk Electrode Design for Concentration Measurements in Flowing Molten Chloride Salts
… a metal-based fuel that could be used in certain advanced reactors. Molten salt reactors are of particular interest when it comes to reprocessing spent nuclear fuel because of their unique property of using a liquid fuel. Molten salt reactors and spent fuel reprocessors could be directly connected …
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