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|Title: ||Photographic Study of Nucleate Boiling at Critical Heat Flux|
|Authors: ||Lobo, Lionel|
|Advisor: ||Ashgriz, Nasser|
|Keywords: ||Nucleate Boiling|
|Issue Date: ||23-Nov-2010|
|Abstract: ||The two phase liquid-vapour flow in a CANDU reactor core is an important part of the nuclear power generation process. In order to improve the safety and economics of a CANDU reactor, it is essential to understand the mechanisms governing this flow and the mechanism governing the formation of vapour bubbles at the Critical Heat Flux. While prior research exists about nucleation and heat transfer at normally achievable temperatures and pressures, not enough is known about nucleation at nuclear conditions.
This project is the first step towards developing effective heat transfer models at nuclear conditions and is intended to demonstrate the feasibility of such an analysis. The setup used for this study was developed using dimensions from existing nuclear fuel rod systems in order to simulate a single fuel rod immersed in a horizontal liquid flow. Inlet water pressure and flow rate can be varied in this setup and the effects of these variations on nucleation can be observed photographically. Due to time constraints a complete analysis of pressure and flow rate effects was not completed, however detailed recommendations on how to proceed with such an analysis has been presented.
A significant setback faced during this project was related to the design and installation of the glass windows. To determine the thickness of these windows and maximum allowable torque, a detailed analysis was performed in SolidWorks and Cosmos and the results have been presented in this report.|
|Appears in Collections:||Master of Engineering (M.Eng.) project reports|
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