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Fusion Engineering and Design 3940 (1998) 651657 Analysis of thermomechanical interactions and properties of
 

Summary: Fusion Engineering and Design 3940 (1998) 651657
Analysis of thermomechanical interactions and properties of
ceramic breeder blankets
Alice Ying *, Mohamed Abdou
Mechanical and Aerospace Engineering Department, UCLA, Los Angeles CA 90095-1597, USA
Abstract
Analysis of the thermomechanical interactions of fusion blanket materials and physical elements, particularly those
involving particle bed design concepts, have been performed. The results show that the stress caused by the high
thermal expansion of the blanket particle bed material is not excessive enough to be of concern for the structural
material. However, its magnitude could lead to ceramic particle breakage if the bed behaves like a solid material.
Furthermore, the calculations show that the clad deflection caused by this stress could lead to a possible separation
between the bed and clad, which would add an unfavorable thermal resistance to the region and increase local
temperature. A comparison between the estimated stress extrapolated from the experimental data and the analytical
results shows that the thermomechanical performance of the pebble bed approaches that of solid materials. 1998
Elsevier Science S.A. All rights reserved.
1. Introduction
High volumetric heat generation rates and low
thermal conductivity cause large temperature gra-
dients in the breeder elements. These temperature
differences produce expansion of materials and if

  

Source: Abdou, Mohamed - Fusion Science and Technology Center, University of California at Los Angeles

 

Collections: Plasma Physics and Fusion