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Tritium Breeders

Tritium Breeders. Stability. 300 - 800 ˚C. 400 - 900 ˚C. High. High. These tritium breeder are available in DEMO blanket?. Why we need advanced tritium breeder?. Development target. Where is yellow area?. DEMO Blanket. TBR. Requirement 1) ?˚C 2) ? 3) ?. Li 2 O.

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Tritium Breeders

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  1. Tritium Breeders Stability 300 - 800˚C 400 - 900˚C High High These tritium breeder are available in DEMO blanket? Why we need advanced tritium breeder?

  2. Development target Where is yellow area? DEMO Blanket TBR Requirement 1) ?˚C 2) ? 3) ? Li2O Li4SiO4 Li2ZrO3 Li2TiO3 LiAlO2 Selection of important item Stability(high temperature use) Development target of advanced tritium breeder is influenced by requirement of DEMO blanket.

  3. Requirement Condition

  4. For Example1 DEMO Blanket in ●● Requirement 1) 300 – 800˚C →Requirement of stability is lower TBR Li2O Li4SiO4 Li2ZrO3 Li2TiO3 LiAlO2 Stability(high temperature use) Li4SiO4 will be selected the tritium breeder for DEMO blanket in ●●. 7/20

  5. For Example2 DEMO Blanket in ●● Requirement 1) TBR is enough →Requirement of TBR is lower 2) More stability TBR Li2O Li4SiO4 Li2ZrO3 Li2TiO3 LiAlO2 Stability(high temperature use) LiAlO2 will be selected the tritium breeder for DEMO blanket in ●●. 8/20

  6. Advanced Tritium Breeder in JA Why we need advanced tritium breeder? DEMO Blanket in JA Requirement 1) 300 – 1000˚C 2) 30% 6Li burn up 3) Use for 2 years TBR Li2O Li4SiO4 Li2ZrO3 Li2TiO3 LiAlO2 Stability(high temperature use) Li2TiO3 with additional Li (Li2+xTiO3+y) has higher stability at high temperatures in a reducing atmosphere. 9/20

  7. Li Vaporization In my confidential experiment, I become dubious about the credibility of this results. So, I proposed that we try to this measurement again . Li2O > Li2ZrO3 = Li4SiO4 = Li2TiO3 > LiAlO2 Reference: Application of high temperature mass spectrometry and work function measurement to evaluation of thermochemical performance of ceramic breeders , Fusion Engineering and Design, Volumes 49-50, November 2000, Pages 681-688 Atsushi Suzuki, Kenji Yamaguchi, Takayuki Terai, MichioYamawaki

  8. Li burn-up This results are show in domestic conference by Hoshino. Condition: 30％Li-6, 900℃（in 1%H2-He ), 2years Li + n -> T + He Loss of Li is 0.27mol Complex mixture TBR will be decreased. Tritium release characteristic will be changes.

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