Transfer Phenomena of Tritium on Ceramic Breeder Materials

氚在陶瓷增殖材料上的转移现象

• 批准号: 06453203
• 负责人: NISHIKAWA Masabumi
• 金额: $ 3.9万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-06453203/
• 关键词: ceramic breeder; water adsorption; surface reaction; tritium inventory; water formation reaction; 粒子内拡散

Present author has quantified the amount of water captured in various lithium ceramic breeder materials and compared the tritium inventory at the blanket due to sorption with that due to diffusion in the crystal grain. Tritium inventory at the blaket due to sorption is much larger than that due to diffusion in the crystal grain unless otherwise a large amount of swamping of H_2 or H_2O to the purge gas is applied in the high temperature blanket. Therefore, it can be considered that the diffusivity of tritium in the crystal grain obtained from the tritiated water release experiments gives the value including the mass transfer resistance at surface.It is also found by the present work that formation of water in the lithium oxide bed occurs in the course of the isotope exchange reaction experiments using He sweep gas with hydrogen isotopes.It is anticipated that behavior of tritium in the breeding blanket cycle is largely affected by existence of water. Accordingly, it is important to understand the water formation phenomenon occurs at addition of hydrogen to the blanket purge gas.

本文作者量化了各种锂陶瓷增殖材料中捕获的水量，并比较了由于吸附与由于在晶粒中扩散而导致的在包层处的氚库存。在高温包层中，除非有大量的H_2或H_2O淹没到吹扫气体中，否则由于吸附而引起的氚在包层中的存量远大于由于在晶粒中的扩散而引起的氚在包层中的存量。因此，我们认为，氚水释放实验得到的氚在晶粒中的扩散系数可以认为是包括表面传质阻力在内的数值。本工作还发现，在用He吹扫气与氢同位素进行同位素交换反应的过程中，氧化锂床层中也会有水的生成。预计氚在锂氧化物床层中的行为可能与氢同位素交换反应有关。繁殖毯的周期很大程度上受水的存在的影响。因此，重要的是理解在向覆盖层吹扫气体添加氢时发生的水形成现象。

项目成果

Y.Kawamura: "Adsorption and Desorption Rate of Water on the Various Ceramic Breeder Materials" Fusion Technology. 27. 25-34 (1995)

Y.Kawamura：“水在各种陶瓷增殖材料上的吸附和解吸速率”融合技术。

Y.Kawamura: "Adsorption and desorption rate of water on the various ceramic breeder materials" Fusion Technology. 27. 25-35 (1995)

Y.Kawamura：“水在各种陶瓷增殖材料上的吸附和解吸速率”融合技术。

Y.Kawamura and M.Nishikawa: "Adsorption and desorption rate of water on the various ceramic breeder materials" Fusion Technology. vol.27. 25-35 (1995)

Y.Kawamura和M.Nishikawa：“水在各种陶瓷增殖材料上的吸附和解吸速率”融合技术。

Y.Kawamura, M.Nishikawa, T.Shiraishi and K.Okuno: "Formation of water in lithium ceramics bed at hydrogen addition to purge gas" Journal of Nuclear Materials. vol.230. 287-294 (1996)

Y.Kawamura、M.Nishikawa、T.Shiraishi 和 K.Okuno：“向净化气体中添加氢气时锂陶瓷床中水的形成”《核材料杂志》。

M. Nishikawa: "Tritium inventory in ceramic breeder materials" Proc. 4th Int. Workshop on C. B. B. I. 15-23 (1995)

M. Nishikawa：“陶瓷增殖材料中的氚库存”Proc。