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Progress in Chemistry 2011, Vol. 23 Issue (9): 1906-1914 Previous Articles   Next Articles

• Review •

Material Properties and Tritium Release Behavior of Neutron-irradiated Ceramic Tritium Breeders

Xiao Chengjian, Chen Xiaojun, Kang Chunmei, Wang Xiaolin*   

  1. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
  • Received: Revised: Online: Published:
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For securing an adequate tritium supply to sustain the D/T fusion reaction, Lithium-containing ceramics,such as Li2O,LiAlO2,Li2ZrO3,Li2TiO3,Li4SiO4,are considered strongly as tritium breeding materials for fusion reactor blankets.Lithium ceramic tritium breeders have favorable chemical behavior,good thermomechanical properties and excellent tritium release performance, thereinto their tritium release performance in neutron irradiation is the primary technique target in the test blanket module. Many aspects are sumed up in this paper:properties of the irradiated ceramic tritium breeders (chemical stability, thermomechanical properties, ion conductivity, neutron activation and so on), tritium release behavior in pile and out of pile,influence factors on tritium diffuse or transfer in ceramic breeders,and correlation between tritium release and annihilation of irradiation defects. In support of the development of Helium Cooled Pebble Bed Test Blanket Module(HCPB TBM), many fundamental research subjects need further study in china. In the future,much effort work should focus on the lithium ceramics' properties at high burnup(>10%) and at high damage rates. In particular, the tritium release behaviour at integrated engineering conditions in the test blanket of ITER, including neutron multiplier, magnetic field, plasma induced current and so on, remains to be known.

Contents
1 Introduction
2 Oropertie of irradiated ceramic breeder
2.1 Effects of irradiation on structure and composing
2.2 Effects of irradiation on ion conductivity
2.3 Effects of irradiation on thermal conductivity and strength
2.4 Neutron activation
3 Tritium release behavior of ceramic breeder
3.1 Influence of Neutron fluence on tritium form
3.2 Influence of magnetic field on tritium release behavior
3.3 Influence of temperature on tritium release behavior
3.4 Influence of carrier gas on tritium release behavior
3.5 Influence of grain dimension on tritium release behavior
3.6 Influence of impurity on tritium transferring
3.7 Influence of catalytically active metal on tritium release behavior
3.8 Experiment system on tritium release behavior
4 Defect and irradiation behavior
4.1 Effect of oxygen vacancies on tritium releasing
4.2 Influence of lithium-ion vacancies on tritium release behavior
5 Conclusion

Key words: lithium ceramic tritium breeders, tritium release behavior, helium cooled pebble bed blanket, ITER

CLC Number: 

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