Chemical behavior of Li2BeF4 molten salt as a liquid tritium breeder
Chemical behavior of Li2BeF4 molten salt as a liquid tritium breeder
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DOI：
10.1016/s0920-3796(01)00581-6
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发表时间：
2001-11
期刊：
影响因子：
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通讯作者：
H. Nishimura;A. Suzuki;T. Terai;M. Yamawaki;S. Tanaka;A. Sagara;O. Motojima
中科院分区：
文献类型：
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作者：
H. Nishimura;A. Suzuki;T. Terai;M. Yamawaki;S. Tanaka;A. Sagara;O. Motojima
综述了Flibe （liff - bef2熔盐）化学行为的研究成果，重点介绍了其氚释放和对结构材料的腐蚀。氚的释放行为取决于系统中的氧化还原电位。随着吹扫气体h2分压的增加，氚的化学形态由TF变为HT或t2t，氚的释放速率也随之增加，这可以用盐中同位素交换反应的氚释放模型来解释。对腐蚀行为进行了热力学分析和静力试验。结果表明，某些类型的氧化层对铁素体钢具有一定的保护作用，而对v基合金来说，在Flibe的存在下没有稳定的氧化膜存在。应针对腐蚀问题开发氧化还原控制和/或耐腐蚀涂层。结论认为氧化还原控制是飞膜系统的关键问题，并指出了未来的研究方向。
Research results on chemical behavior of Flibe (LiF–BeF2molten salt) are reviewed, being focused on tritium release and corrosion against structural materials. Tritium release behavior depended on the REDOX potential in the system. The chemical form changed from TF to HT or T2with increasing H2partial pressure of the purge gas, and tritium release rate increased also with that, which can be explained well by a tritium release model with an isotopic exchange reaction in the salt. As for the corrosion behavior, a thermodynamic analysis and static experiment were carried out. It was suggested that some kinds of oxide layers can work as a protective scale for ferritic steel, while for V-based alloys, no stable oxide film can exist in the presence of Flibe. REDOX control and/or corrosion-resistant coating should be developed for the corrosion problem. It is concluded that the REDOX control is a key issue for Flibe blanket systems, and future R&D items are pointed out.