Results of R&D for lithium/vanadium breeding blanket design
Results of R&D for lithium/vanadium breeding blanket design
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R的结果
DOI：
10.1016/s0920-3796(98)00274-9
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发表时间：
1998
影响因子：
1.7
通讯作者：
S. Votinov
中科院分区：
文献类型：
--
作者：
R. Mattas;D. L. Smith;C. Reed;J. Park;I. Kirillov;Y. Strebkov;A. Rusanov;S. Votinov
自冷却锂/钒包层概念对于聚变动力系统具有几个有吸引力的特征，包括减少活化、抗辐射损伤、适应高热负荷和在650-700°C的温度下运行。与锂/钒概念相关的主要问题是当锂流过托卡马克的高磁场时，锂所经历的潜在高MHD压降。这个问题的解决方案是在钒合金的内部施加薄的绝缘涂层，以防止在结构内产生涡电流，涡电流是造成高MHD力和压降的原因。本文介绍了一种能在严酷聚变环境下工作的绝缘涂层的研制进展，钒合金的制备进展，以及磁流体动力学试验的总结。在液态锂中对钒合金进行了大量的CaO和AlN涂层的小型试验，以确定涂层的电阻率和稳定性。在锂中的原位测量已经确定，105 μm厚的CaO涂层具有超过106Ω cm 2的电阻率乘以厚度值（p*t）。这些结果已被用于确定在ALEX（阿贡液态金属实验）设施中测试的大型钒合金（V-4Cr-4 Ti）试验段涂层的制造程序。俄罗斯和美国也生产了类似的试验段。
The self-cooled lithium/vanadium blanket concept has several attractive features for fusion power systems, including reduced activation, resistance to radiation damage, accommodation of high heat loads and operating to temperatures of 650–700°C. The primary issue associated with the lithium/vanadium concept is the potentially high MHD pressure drop experienced by the lithium as it flows through the high magnetic field of the tokamak. The solution to this issue is to apply a thin insulating coating to the inside of the vanadium alloy to prevent the generation of eddy currents within the structures that are responsible for the high MHD forces and pressure drop. This paper presents the progress in the development of an insulator coating that is capable of operating in the severe fusion environment, progress in the fabrication development of vanadium alloys, and a summary of MHD testing. A large number of small scale tests of vanadium alloy specimens coated with CaO and A1N have been conducted in liquid lithium to determine the resistivity and stability of the coating. In-situ measurements in lithium have determined that CaO coatings, ∼5 μm thick, have resistivity times thickness values (p*t) exceeding 106Ω cm2. These results have been used to identify fabrication procedures for coating a large vanadium alloy (V–4Cr–4Ti) test section that was tested in the ALEX (Argonne Liquid metal Experiment) facility. Similar test sections have been produced in both Russia and the USA.