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Showing 1 to 20 of 34 for “"TRISO"”.
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Multi-mode imaging for TRISO-fueled pebble identification
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01
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Coating Parameters of Zirconium Carbide On Advanced Triso Fuels
… greatly depends on the tri-structural isotropic (TRISO) fuel particles reliability to retain both gaseous and metallic fission products created in irradiated UO2. Most research devoted to TRISO fuel particles has focused on the characteristics and retention ability of silicon carbide as the main …
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Thermodynamic and Thermochemical Investigation of Advanced Triso Coated Particle Fuels
… over a range of values representative of the TRISO fuel (10-8~10-6atm). This work was done in support of developing capabilities for future experimentation. Specifically, the mixing of CO/CO2 gases and the humidification of H2 or H2/Ar gas mixtures was evaluated. Experiments conducted as part …
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Comprehensive fuel performance model development and simulation for triso fuel
Item withdrawn by Alexis Thompson (athmpsn1@illinois.edu) on 2011-01-13T19:58:31Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Hu_Jianwei.pdf: 5191894 bytes, checksum: 702afe062ec7e3d71c3ef29c7b15f21a (MD5)
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Modeling tritium release from TRISO-coated NP-MHTGR target particles
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1992.
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The Effect of Coating Parameters On Advanced TRISO Fuels With Zirconium Carbide
<p>Recent studies of TRISO fuel behavior have shown a number of problems with the conventional SiC TRISO coating system at very high temperature, not unlike the temperatures obtainable in the very high temperature reactor (VHTR) design. These problems include but are not limited to over …
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Development of a High Temperature Gas-Cooled Reactor TRISO-coated particle fuel chemistry model
… in a High Temperature Gas-Cooled Reactor TRISO fuel particle. Fission product inventory versus burnup is calculated. Based on those results a thermodynamic analysis is performed to determine fission product vapor pressures, oxygen partial pressure, and carbon monoxide and carbon dioxide …
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Benchmarking of the MIT High Temperature Gas-cooled Reactor TRISO-coated particle fuel performance model
… Fuel Performance Model to study the behavior of TRISO nuclear fuels. The code, TIMCOAT, is designed to assess the mechanical and chemical condition of populations of coated particles and to determine the failure probability of each of the structural coating layers. With this, the code determines …
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Analysis of U-Zr-C-O Quaternary System for Applications in Advanced ZRC Coated Triso Particles
<p>The implementation of ZrC for use in oxide TRISO particles for Very High Temperature Reactor (VHTR) conditions to prevent kernel overpressurization and kernel migration has been proposed by several researchers. Analysis is performed incorporating first-principles thermodynamics along with …
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The Deposition Characteristics of Zrc On Uo2 Kernels Produced For Advanced Triso Fuels In Gen-Iv Reactors
… ability of the tri-structural isotropic fuel (TRISO) to maintain its structural integrity under irradiation at temperatures of normal operation and accident scenarios. The silicon carbide (SiC) layer typical of most TRISO fuels acts as both a diffusion barrier and a pressure vessel for the …
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Investigation of the hydrodynamics and scale-up of advanced TRISO nuclear fuel manufacturing using sophisticated measurement techniques
… (VHTR) extremely depend on the quality of the TRISO nuclear fuel coated particles. However, the coating of the TRISO particles is delicate process and impacted by the hydrodynamics of spouted beds. Therefore, in this work, we applied advanced non-invasive measurement techniques which are …
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Experimental investigations of the thermodynamic properties of Nd-C and Ce-C binary systems for TRISO fuel applications
TRISO fuels are proposed for modular and niche nuclear power reactor technologies, expanding the global nuclear power inventory to meet increasing energy demands through small scale applications. Expansion is dependent upon the improvements to safety through thorough understanding of fission …
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Reactivity-equivalent physical transformation model for pin cell arrays
The behavior of TRISO fuel used in high temperature gas reactors in order to achieve high fuel performance is difficult to model using traditional lattice codes due to the double-heterogeneity effect created by the multi-coated fuel kernels in a graphite matrix. A simple volume-weighted …
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Tritium transport, corrosion, and Fuel performance modeling in the Fluoride Salt-Cooled High-Temperature Reactor (FHR)
… concept fueled by tristructural isotropic (TRISO) fuel particles embedded in graphite spheres and cooled by a liquid fluoride salt known as "flibe" (7LiF-BeF2). A system of models was developed which enabled analyses of the performance of a prototypical pebble bed FHR (PB-FHR) with respect …
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Evaluating of scale-up methodologies of gas-solid spouted beds for coating triso nuclear fuel particles using advanced measurement techniques
"The work focuses on implementing for the first time advanced non-invasive measurement techniques to evaluate the scale-up methodology of gas-solid spouted beds for hydrodynamics similarity that has been reported in the literature based on matching dimensionless groups and the new mechanistic scale …
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Levelized Cost of Fuel (LCOF) studies for microreactors using TRISO fuel in hydride and beryllium-based composite moderators in open and closed fuel cycles
… gas-cooled 10 MW_th microreactors (HTGRs) with TRISO fuel in prismatic- and pebble-bed cores—using four composite moderator concepts (MgO–Be, MgO–BeO, MgO–YH, MgO–ZrH). These options are compared against a prismatic graphite benchmark, under both once-through and continuous-recycle fuel cycles. …
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OXIDATION OF SILICON CARBIDE AND GRAPHITE FOR HIGH TEMPERATURE GAS-COOLED REACTOR APPLICATIONS
… of the SiC layer of tristructural isotropic (TRISO) fuel particles demonstrated different oxidation behavior than that of typical flat-plate chemical vapor deposited SiC and that of SiC fibers with regards to stress relief and devitrification in the SiO<sub>2</sub> scale. By comparing the …
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Modelling of Graphite Elements and Low Enriched Fuel Assemblies for a High Temperature Gas-Cooled Reactor
… leverages the safety advantages of gas- cooled, TRISO fuelled reactors, and the economic advantages of a horizontal compact layout. Graphite assembly blocks create the channels that guide the helium coolant flow and contain the fuel compacts in the HC-HTGR. Given the low tensile strength of …
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