Thermal Performance Study of Liquid Metal Fast Breeder Reactor Insulations
Shiu, Kelvin Kwok-Kay
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https://hdl.handle.net/2142/67796
Description
Title
Thermal Performance Study of Liquid Metal Fast Breeder Reactor Insulations
Author(s)
Shiu, Kelvin Kwok-Kay
Issue Date
1980
Department of Study
Nuclear Engineering
Discipline
Nuclear Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Nuclear
Energy
Language
eng
Abstract
Three types of metallic thermal insulations were investigated analytically and experimentally. These were multilayer reflective plates, multilayer honeycomb composite and multilayer screen insulation. Each of these insulations was subjected to evacuated and non-evacuated conditions where thermal measurements were made to determine their thermal physical characteristics. A variation of the separation distance between adjacent reflective plates of multilayer reflective plates and multilayer screen insulations was also experimentally studied to reveal its significance. One of the configurations of the multilayer screen insulation was further selected to be examined in sodium and sodium oxide environments. The emissivity of stainless steel 304 used in comprising the insulations was measured by employing infrared technology.
A comprehensive model was developed to describe the different proposed thermal insulations. Various modes of heat transfer inherent in each particular type of insulation were addressed and their relative importance compared. Provision was also made in the model to allow accurate simulation of possible sodium and sodium oxide contamination of the insulation. The thermal radiation contribution to heat transfer in the temperature range of interest for LMFBR was found to be moderate and the suppression of natural convection within the insulation was vital in preserving its insulating properties. Experimental data were compared with the model and other published results. Moreover, assessment and comparison were made of the three proposed test samples under various conditions as viable LMFBR thermal insulations.
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