Effects of lead addition on tritium recovery for advanced Li2TiO3-Li4SiO4 mixed breeder material

The effect of Pb addition on tritium recovery for Li2TiO3-Li4SiO4 mixed ceramic materials was investigated by Tritium-thermal desorption spectroscopy (T-TDS). The behavior of irradiation defects was also studied by electron spin resonance (ESR) with heating. The sample with the lower neutron fluence...

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Bibliographic Details
Published in:Journal of nuclear materials 2024-08, Vol.597, p.155141, Article 155141
Main Authors: Sanfukuji, Asahi, Zhou, Qilai, I․ Kobayashi, Makoto, Oya, Yasuhisa
Format: Article
Language:English
Subjects:
Li4SiO4-Li2TiO3 advanced solid breeder materials
Neutron irradiation
Tritium
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Summary:The effect of Pb addition on tritium recovery for Li2TiO3-Li4SiO4 mixed ceramic materials was investigated by Tritium-thermal desorption spectroscopy (T-TDS). The behavior of irradiation defects was also studied by electron spin resonance (ESR) with heating. The sample with the lower neutron fluence of 8.0 × 1015 n cm−2 had a tritium desorption stage on the low temperature side, 400 K, which can be ascribed to the tritium adsorption on the surface. As the neutron fluence was increased, the desorption of tritium retained in the bulk was major tritium desorption process. The major desorption stage was shifted to the lower temperature side by Pb addition. The intensity of ESR peak corresponding to O−-center was reduced by Pb addition, indicating the irradiation defect was decreased. This contributes on the reduction of tritium trapping sites and facilitates tritium recovery on the lower temperature side.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2024.155141