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Out-Pile Tritium Release Experiment from Various Ceramic Breeder Materials in KUR

M. Nishikawa, K. Munakata, T. Takeishi, A. Baba, T. Kawagoe, S. Beloglazov, N. Nakashima, K. Hashimoto, Yokoyama, K. Okuno, Y. Morimoto, H. Moriyama, K. Kawamoto

Fusion Science and Technology / Volume 41 / Number 3P2 / May 2002 / Pages 1025-1029

Blanket Material and Process / Proceedings of the Sixth International Conference on Tritium Science and Technology Tsukuba, Japan November 12-16, 2001 /

Release curve of bred tritium from various ceramic breeder materials such as Li2ZrO3, Li2TiO3, and Li4SiO4 were obtained using the out-pile temperature programmed desorption method in the Kyoto University Research Reactor. A 0.4g sample of breeder particles contained in a quartz tube was irradiated for 120s at the thermal neutron flux of about 2.8x1017n/m2s in N2 atmosphere under the temperature of 360K. Tritium release behavior was measured using an ionization chamber connected to the release tritium measurement apparatus. The sample was purged by dry N2, N2 with hydrogen of various partial pressure, or humidified N2 gas. The temperature of the sample bed was changed linearly from room temperature to 1073K with the rising rate of 5K/min.Characteristics of tritium release behavior obtained for various ceramic breeder materials under various purge gas conditions are compared in this paper.

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