Tritium diffusion and desorption in single crystal LiAlO[sub 2]

Conference · Tue Dec 31 23:00:00 EST 1991

OSTI ID:7368462

Kopasz, J P; Seils, C A; Johnson, C E

In an attempt to determine the diffusivity of tritium in lithium aluminate, we have performed isothermal anneal tests on single crystal samples (approximately 1.5 mm dia.). Large single crystals were used to minimize the contributions from desorption. Diffusion kinetics become more dominant as the crystal radius increases due to the decreasing surface area to volume ratio. However, the release may still be in the mixed diffusion-desorption regime which would make obtaining the rate constants from the time dependence of the tritium release difficult. Therfore, we have decided to section the samples and determine the diffusivity from the tritium concentration profile within the sample. In addition, in an attempt to understand the effects of impurities on the tritium transport, we have studied the tritium profiles in pure and Mg doped (0.3%) LiAlO[sub 2].

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7368462
• Report Number(s): ANL/CMT/CP-79667; CONF-9210255--2; ON: DE93015140
• Country of Publication: United States
• Language: English

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ALKALI METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BREEDING BLANKETS
CERAMICS
CHALCOGENIDES
DESORPTION
DIFFUSION
Fu
Fuels-- (1992)
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
LITHIUM COMPOUNDS
NUCLEI
ODD-EVEN NUCLEI
OXIDES
OXYGEN COMPOUNDS
RADIOISOTOPES
REACTOR COMPONENTS
SORPTION
TEMPERATURE DEPENDENCE
TRITIUM
YEARS LIVING RADIOISOTOPES