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AbstractAbstract
[en] Temperature programmed desorption (TPD) measurements are in progress to provide data describing the kinetics of desorption of H2O(g) and H2(g) from ceramic tritium breeders. Preliminary blank experiments indicated that the steel can be a reactive participant with H2O being consumed and H2 being evolved. There is also evidence of some dissolution of H2 in the steel. However, it is possible to stabilize the tube in the absence of added H2 so that useful measurements with H2O(g) can be made. Initial work is on the LiAlO2-H2O(g) system. Fresh samples of LiAlO2 bear large amounts of adsorbed H2O. TPD spectra were measured for LiAlO2 that had been equilibrated with 200 ppM H2O(g) at temperatures from 473 to 773 K. Several techniques of data analysis were applied. There still remain questions of possible peak overlap to resolve for all cases. An activation energy of desorption of H2O(g) of approximately 120 kJ/mol appears to be associated with the sample equilibrated at 673 K. When compared with the same value reported in the literature for decomposition of LiOH, this result suggests that some sites on LiAlO2 might resemble sites on Li2O in their adsorptive properties. For the 773 K equilibration, the activation energy of desorption appears considerably higher. 6 refs., 4 figs
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1989; 12 p; 4. international conference on fusion reactor materials; Kyoto (Japan); 4-8 Dec 1989; CONTRACT W-31109-ENG-38; NTIS, PC A03/MF A01 as DE90004880; OSTI; INIS; US Govt. Printing Office Dep
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Report
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Conference
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ALKALI METAL COMPOUNDS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, CHALCOGENIDES, ENERGY, HYDROGEN COMPOUNDS, HYDROGEN ISOTOPES, ISOTOPES, LIGHT NUCLEI, LITHIUM COMPOUNDS, MATERIALS, NUCLEI, ODD-EVEN NUCLEI, OXIDES, OXYGEN COMPOUNDS, POLAR SOLVENTS, RADIOISOTOPES, SOLVENTS, YEARS LIVING RADIOISOTOPES
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