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Thermal stress analysis of fuel element in particle bed reactor

Han, Lu (2013) Thermal stress analysis of fuel element in particle bed reactor. Master's Thesis, University of Pittsburgh. (Unpublished)

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Abstract

In this paper, a method of determination of temperature and thermal stress distributions in a fuel element of a new gas-cooled, thermal spectrum particle bed reactor (GCT-PBR) was derived. It was capable of predicting failure and giving feedback on dimension design. To describe the fuel element, a three-layer conductive porous cylinder with infinite height and different materials was considered. A linear model of heat transfer in a one-dimensional porous medium with uniform internal energy source in cylindrical coordinate was first developed. Only steady state was considered. In thermal stress analysis, the thermal and mechanical properties of the solid phase and coolant were taken as constants, which were independent of temperature and time. Failure analysis was conducted based on von Mises criteria. The effect of geometry on thermal stress was investigated. It was shown that hot frit experienced the highest thermal stress and within design requirement, a thinner hot frit and a thicker cold frit would give a better performance.

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Details

Item Type: University of Pittsburgh ETD
Status: Unpublished
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Han, Luluhansmile@gmail.com
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairSlaughter, Williamwss@pitt.edu WSS
Committee MemberRobertson, Annerbertson@pitt.edu RBERTSON
Committee MemberSmolinski, Patrickpatsmol@pitt.eduPATSMOL
Date: 24 September 2013
Date Type: Publication
Defense Date: 18 July 2013
Approval Date: 24 September 2013
Submission Date: 18 July 2013
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 64
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Mechanical Engineering
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: heat transfer, thermal stress, fuel element, particle bed reactor,
Date Deposited: 24 Sep 2013 20:07
Last Modified: 15 Nov 2016 14:14
URI: http://d-scholarship.pitt.edu/id/eprint/19371

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