Status of Tritium Permeation Barrier Development in the EU
Status of Tritium Permeation Barrier Development in the EU
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DOI：
10.13182/fst05-a791
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发表时间：
2005-05
影响因子：
0.9
通讯作者：
J. Konys;A. Aiello;G. Benamati;L. Giancarli
中科院分区：
文献类型：
--
作者：
J. Konys;A. Aiello;G. Benamati;L. Giancarli
摘要在未来核聚变电站的结构材料上设置合适的阻挡层可以显著降低氚的渗透。由于氧化铝具有减少氚渗透的能力，在过去的10年中，由欧洲委员会（EC）资助了通过不同技术如德国的卡尔斯鲁厄研究中心（FZK）的热浸镀铝（HDA）和法国的原子能委员会（CEA）的化学气相沉积（CVD）在铁素体马氏体钢上开发这种涂层。最终的目标是确定一个所谓的参考涂层的锂铅冷却毯的结构部件。本文介绍了工艺规范和相应的氢渗透测量的结果，在ENEA，巴西，意大利。CVD和HDA涂层的结果清楚地表明，在H2气体中充分超过>1000的渗透降低因子（PRF），但在Pb-17 Li熔体中获得低得多的值。事后分析表明，涂层的表面缺陷和部分剥落是导致PRF过低的原因。由于优先事项的转移和毯子设计从WCLL到HCLL的变化，欧盟对所有主要研发活动的资助在2002年被推迟，直到欧洲毯子概念的重新设计完成。
Abstract Tritium permeation can be significantly reduced by a suitable barrier on the structural materials of a future fusion power plant. Since alumina has the capability of tritium permeation reduction, the development of such coatings on ferritic martensitic steels by different techniques like hot-dip aluminizing (HDA) by Forschungszentrum Karlsruhe, Germany (FZK) and chemical vapor deposition (CVD) by Commissariat a l’Energie Atomique, France (CEA) was funded by the European Commission (EC) during the last 10 years. The final objective was to identify a so-called reference coating for structural components of a lithium-lead cooled blanket. This paper describes the process specifications and the results of the corresponding hydrogen permeation measurements, performed at ENEA, Brasimone, Italy. The results for CVD and HDA coating showed clearly, that Permeation Reduction Factor’s (PRF) of >1000 were sufficiently exceeded in H2 gas, but much lower values were obtained in the Pb-17Li melt. The post mortem analysis revealed that surface imperfections and spallation of parts of the coatings were responsible for the too low PRF’s. Because of shifting of priorities and changes in the blanket design from WCLL to HCLL, the EU funding of all major R&D activities was postponed in 2002 until the redesign of the European Blanket Concepts was finished.