2D Thermal Hydraulic Analysis and Benchmark in Support of HFIR LEU Conversion using COMSOL

Freels, James D; Bodey, Isaac T; Lowe, K.T.; Arimilli, Rao V.

doi:10.2172/989126

Cited by 2 publications

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“…Extensive research and development is currently under way at the Oak Ridge National Laboratory (ORNL) High Flux Isotope Reactor (HFIR) to convert it from its present HEU fuel core to an LEU fuel core [6][7][8][9][10][11][12][13][14][15][16]. Because HFIR is the highest-flux reactor-based neutron source for condensed matter research in the United States, its conversion to an LEU fuel should not impact its current neutron flux performance.…”

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confidence: 99%

3D COMSOL Simulations for Thermal Deflection of HFIR Fuel Plate in the "Cheverton-Kelley" Experiments

Jain¹,

Freels²,

Cook³

2012

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confidence: 99%

3D COMSOL Simulations for Thermal Deflection of HFIR Fuel Plate in the "Cheverton-Kelley" Experiments

Jain¹,

Freels²,

Cook³

2012

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Modeling investigation of the impacts of dead-end fracture on heat transfer of water flowing through rough fractured rocks

Chen

2020

IOP Conf. Ser.: Earth Environ. Sci.

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A clear understanding of the convective heat transfer characteristics of fluid in three-dimensional (3D) rock fractures affected by dead-end fractures is important in evaluating heat recovery in fractured geothermal reservoirs. Two 3D cubic fractured rock models with and without rough dead-end fractures are built to conduct flow and heat transfer simulations by solving hydrothermal coupling equations. The rough fractures are upscaled from lab-measured small-scale rock fractures. Injection velocities of 0.002 m/s and 0.02 m/s were imposed to examine how dead-end fractures affect the heat transfer processes within hot fractured rocks. Several characteristic parameters, including outlet water temperature, total heat extraction, and overall permeability, are presented to quantitatively describe the effects of dead-end fractures. Results show that dead-end fractures retard fluid flow through the fractured model and significantly decrease the overall permeability. A low-temperature zone grows rapidly under the effect of dead-end fractures, and the outlet water temperature is lower in this case than in the model without dead-end fractures. Moreover, the total heat extraction is higher in the model without dead-end fractures than in the model with dead-end fractures. This result is mainly ascribed to the former model’s large overall permeability. Results reveal that dead-end fractures cannot be ignored in the evaluation of flow and heat transfer in the modeling of heat extraction from subsurface fractured geothermal reservoirs.

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2D Thermal Hydraulic Analysis and Benchmark in Support of HFIR LEU Conversion using COMSOL

Cited by 2 publications

References 0 publications

3D COMSOL Simulations for Thermal Deflection of HFIR Fuel Plate in the "Cheverton-Kelley" Experiments

3D COMSOL Simulations for Thermal Deflection of HFIR Fuel Plate in the "Cheverton-Kelley" Experiments

Modeling investigation of the impacts of dead-end fracture on heat transfer of water flowing through rough fractured rocks

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