An Innovative High Thermal Conductivity Fuel Design | |
Khan, Jamil A. | |
University of South Carolina | |
关键词: Heat Transfer; Uranium Dioxide; Thermal Conductivity; Silicon Carbides; Polynomials; | |
DOI : 10.2172/970984 RP-ID : DOE/ID/14597 RP-ID : FG07-04ID14597 RP-ID : 970984 |
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美国|英语 | |
来源: UNT Digital Library | |
【 摘 要 】
Thermal conductivity of the fuel in today's Light Water Reactors, Uranium dioxide, can be improved by incorporating a uniformly distributed heat conducting network of a higher conductivity material, Silicon Carbide. The higher thermal conductivity of SiC along with its other prominent reactor-grade properties makes it a potential material to address some of the related issues when used in UO2 [97% TD]. This ongoing research, in collaboration with the University of Florida, aims to investigate the feasibility and develop a formal methodology of producing the resultant composite oxide fuel. Calculations of effective thermal conductivity of the new fuel as a function of %SiC for certain percentages and as a function of temperature are presented as a preliminary approach. The effective thermal conductivities are obtained at different temperatures from 600K to 1600K. The corresponding polynomial equations for the temperature-dependent thermal conductivities are given based on the simulation results. Heat transfer mechanism in this fuel is explained using a finite volume approach and validated against existing empirical models. FLUENT 6.1.22 was used for thermal conductivity calculations and to estimate reduction in centerline temperatures achievable within such a fuel rod. Later, computer codes COMBINE-PC and VENTURE-PC were deployed to estimate the fuel enrichment required, to maintain the same burnup levels, corresponding to a volume percent addition of SiC.
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970984.pdf | 439KB | download |