ConductionFuel_web

ConductionFuel_web - ENU 4134 – Conduction in Fuel D....

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Unformatted text preview: ENU 4134 – Conduction in Fuel D. Schubring October 29, 2009 (Driving Towards) Single-Channel Analysis The next 4-5 lectures (so 7-8 classes) will focus on analysis methods for single channels in LWR’s. I Conduction in fuel – 1+ I Gap conductance – 1 I Conduction in cladding – << 1 I Convection to coolant – 2-3 As typical, there will be example problems as we go along not included in the notes. Thermal Conductivity in Fuel In the most general case, conductivity is a tensor and an explicit function of space and temperature: ~ ~ k ( ~ r , T ). Tensor properties: in some substances, heat conduction is more efficient in certain directions. This is the case in your project assignment. Graphite is an example of an actual substance with this property. For reactor materials, the tensor properties are negligible at BOL and even smaller as time goes on. (Enrichment: why is this?) We’ll model as k ( ~ r , T ). Thermal Conductivity in Fuel (2) Spatial dependence: reactors are composed of multiple substances,...
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This note was uploaded on 07/14/2011 for the course ENU 4133 taught by Professor Schubring during the Spring '11 term at University of Florida.

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ConductionFuel_web - ENU 4134 – Conduction in Fuel D....

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