Hydrogen Isotope Research Center - Toyama Univ.
Data Base for Tritium Solid Breeding Materials (Li2O, Li2TiO3, Li2ZrO3 and Li4SiO4) of Fusion Reactor Blankets --- Yoshiaki FUTAMURA
5. Database for Li2TiO3(β)
5.5 Irradiation effects
5.5.1 Physical integrity
| No. | Data and remark | Fig. | Refs. |
| 1 | No data | - | 65, 53 |
5.5.2 Swelling
| No. | Data and remark | Fig. | Refs. |
| 1 | No data | - | 65, 53 |
5.5.3 Grain growth
| No. | Data and remark | Fig. | Refs. |
| 1 | No data | - | 65, 62 |
5.5.4 Li transport
| No. | Data and remark | Fig. | Refs. |
| 1 | No data | - | 65, 62 |
5.5.5 Thermal conductivity
| No. | Data and remark | Fig. | Refs. |
| 1 | Refer to tritium diffusivity. | - | 65, 62 |
| Notes1 | Thermal conductivity κ=α·Cp·ρ (W/m-K)
α : Thermal diffusivity (m2/s) Cp : Specific heat (J/g-K) ρ : Density (g/m3) |
- | - |
5.5.6 Young's modulus
| No. | Data and remark | Fig. | Refs. |
| 1 | No data | - | 65, 62 |
5.5.7 Tensile strength
| No. | Data and remark | Fig. | Refs. |
| 1 | No data | - | 65, 62 |
5.5.8 Compressive strength
| No. | Data and remark | Fig. | Refs. |
| 1 | No data | - | 65, 62 |
5.5.9 Bending strength
| No. | Data and remark | Fig. | Refs. |
| 1 | No data | - | 65, 62 |
5.5.10 Tritium diffusivity
| No. | Data and remark | Fig. | Refs. |
| 1 | ~10-9cm2/s, 600°C | - | 6 |
| 2 | Summary of Tritium Diffusion Coefficient in Li2TiO3, Li2O, Li2ZrO3 and Li4SiO4. | 5.5 | 18 |
5.5.11 Tritium residence time (hr)
| No. | Data and remark | Fig. | Refs. |
| 1 | Roughly similar to Li2ZrO3. | - | 65 |
5.5.12 Tritium release
| No. | Data and remark | Fig. | Refs. |
| 1 | Tritium release performance is excellent and is similar to Li2ZrO3. More than 80% tritium released within ~11 hr at 250°:C (see Fig.5.6). | - | 2, 50 |
| 2 | Isothermal tritium release at 300°:C, 280°:C, 250°:C, 200°:C in He + 0.1% H2 purge gas, flowrate 2.4 l-hr-1 for Li2TiO3. Release rate increases rapidly in case of heating from 200°:C to 250°:C. | 5.6 | 2, 50, 51 |
| 3 | Effects of purge gas composition on tritium release from sample sintered at 1498K and heating rate of 2 K/min. | 5.7 | 2, 67 |
| 4 | Effect of sintered temperature on tritium release for a purge gas of pure helium and heating rate of 2K/min. | 5.8 | 2, 67 |
| 5 | Tritium desorption curves for Li2TiO3 and Li2ZrO3 at linear heating rate of 2 K/min, pure He sweep gas. | 5.9 | 2, 67 |
5.5.13 Tritium retention
| No. | Data and remark | Fig. | Refs. |
| 1 | Refer to tritium release | - | - |
5.5.14 Helium retention
| No. | Data and remark | Fig. | Refs. | ||||||||
| 1 |
Retained fraction (%), (1 K/min ramp rate)
|
- | 51, 65 |
5.5.15 After heat (W/cm3)
| No. | Data and remark | Fig. | Refs. |
| 1 | 0.17%, at 15 MW. yr/m2 fluence, 10-yr cooling, 85%TD | - | 62, 90 |
| Notes1 | For the base case with no impurities, the U.S. Class C waste disposal rating for Li2TiO3 is roughly equal to that for Li2O and Li4SiO4, and more than 10 times lower than for Li2ZrO3. | - | 65 |
| No. | Data and remark | Fig. | Refs. |
| 1 | 0.05 W/cm3 at 15 MW. yr/m2 fluence, 1-hr cooling, 85% dense. No impurities : tritium retained in breeder. | - | 62, 65, 90 |
| Notes1 | For the base case with no impurities, the afterheat levels in Li2TiO3 are 20~50 times more than in Li2O and Li4SiO4, but 2~100 times lower than in Li2ZrO3. | - | 65 |
5.5.16 Class C waste disposal rate
5.6 Thermal properties of Ti2O doped Li2TiO3
5.6.1 Effect of Ti2O doping on thermal properties of Li2TiO3
| No. | Data and remark | Fig. | Refs. |
| 1 | Thermal conductivity of Ti2O doped Li2TiO3 with less than 5% mol. Ti2O powder is similar to that of Li2TiO3 without Ti2O doping. | - | - |
| 2 | Temperature dependence of thermal conductivity for Ti2O doped Li2TiO3. | 5.10 | 93 |
| Notes1 | Thermal conductivity κ=α·Cp·ρ (W/m-K)
α : Thermal diffusivity (m2/s) Cp : Specific heat (J/g-K) ρ : Density (g/m3) |
- | - |
