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Fusion Engineering and Design 17 (1991) 73-78 73 North-Holland

Summary: Fusion Engineering and Design 17 (1991) 73-78 73
Analysis of tritium release from LiA10 2 in the TEQUILA
experiment, using the MISTRAL code
A. Badawi, A.R. Raffray and M.A. Abdou
University of California, Los Angeles, Department of Mechanical, Aerospace and Nuclear Engineering, Los Angeles,
CA 90024-1597, USA
The tritium release behavior from LiA102 samples in the TEQUILA experiment was analyzed using the MISTRAL code.
This was done in order to benchmark the code for analyzing the performance of a LiAIO2 blanket test section under
ITER-like conditions. Material property data available from the experimental sample microstructure characterization and
from the literature were used as input to the code. The microstructure characterization was quite thorough and included the
pore size distribution which was used to estimate the pore diffusion coefficient. In the case of the bulk diffusion coefficient,
since single crystal experimental measurements are not available, two different values from different experimental data were
The strategy was to model four different transients for the same sample and to use the property data, in particular the
diffusion coefficient, which will better reproduce all four transients. The transients studied were: two temperature
transients, in which the temperature changed by +50 °C and -50 °C and two hydrogen concentration transients in the
purge, in which the concentration changes from 0.1% to 1% and from 1% to 0.1%. The results showed that the assumed
bulk diffusion coefficient can change the output substantially. For each case, the effects of other parameters, such as the
adsorption activation energy and pore diffusion coefficient, were also considered. The results are discussed in the paper.


Source: Abdou, Mohamed - Fusion Science and Technology Center, University of California at Los Angeles
Raffray, A. René - Center for Energy Research, University of California at San Diego


Collections: Plasma Physics and Fusion