Development of fabrication technologies for advanced tritium breeder pebbles by the sol-gel method

Hoshino, Tsuyoshi

Lithium titanate (Li $_{2}$ TiO $_{3}$ ) has been recognized as a prominent candidate material for use in a tritium breeder. However, the mass of Li $_{2}$ TiO $_{3}$ is decreased over time by Li evaporation in a hydrogen atmosphere, Li burn-up under the high temperatures, and high neutron fluence irradiation found in a DEMO reactor. To compensate for this decrease in mass at high temperatures, Li $_{2}$ TiO $_{3}$ with additional Li (Li $_{2+x}$ TiO $_{3+y}$ ) have been developed as an advanced tritium breeder. Pebble fabrication using the sol-gel method is one of the promising techniques for the mass production of the advanced tritium breeder pebbles. The authors have been developing a technique of fabricating Li $_{2+x}$ TiO $_{3+y}$ pebbles using the sol-gel method. To increase the density of sintered Li $_{2+x}$ TiO $_{3+y}$ pebbles, the sintering temperature was changed, and at 1473 K, the density of the pebbles was increased to approximately 75%T.D., without any increase in the grain size. This shows the pore size in sintered Li $_{2+x}$ TiO $_{3+y}$ pebbles is decreased by vacuum sintering.

Language	:	English
Journal	:	Fusion Engineering and Design
Volume	:	88
Number	:	9-10
Pages	:	p.2264 - 2267
Publication Year/Month	:	2013/10
Meeting title	:	27th Symposium on Fusion Technology (SOFT 2012)
Held date	:	2012/09
Location (city)	:	Lige
Location (country)	:	Belgium
Patent information	:
PDF	:
Paper URL	:	https://doi.org/10.1016/j.fusengdes.2013.05.025
DOI for research data	:
Keywords	:	no keyword
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Article of JAEA R&D Review	:
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Registration No. : BB20121190
JAEA Abstracts No. : 41001389
Paper Submission No. : 13372

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