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，并比较了由于吸附而导致的氚库存与由于晶粒中的扩散而导致的氚库存。由于吸附而在包层处的氚存量远大于由于晶粒中的扩散而产生的氚存量，除非在高温包层中应用大量H_2或H_2O到吹扫气体中。因此，可以认为，由氚化水释放实验获得的晶粒中氚的扩散率给出了包括表面传质阻力的值。目前的工作还发现，氧化锂床中水的形成发生在使用He吹扫气与氢同位素的同位素交换反应实验过程中。预计氚在增殖层循环中的行为很大程度上受水的存在的影响。因此，了解在向覆盖吹扫气体中添加氢气时发生的水形成现象是很重要的。

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。