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In efforts to develop advanced tritium breeders, effects of additives to lithium titanate (Li 2 TiO 3) have been investigated, and a good prospect has been obtained by using oxide additives such as TiO 2 , CaO and Li 2 O. As for neutron multiplier, development of a real-size electrode fabrication technique and the characterization of beryllium-based intermetallic compounds such as Be-Ti have been performed. The properties of Be-Ti alloys are better than those of beryllium metal. Especially, steam interaction of a Be-Ti alloy was about 1/1000 as small as those of beryllium metal. These activities have given bright prospects to realize the water-cooled DEMO breeder blanket by application of these advanced materials.

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