Investigations of castellated structures for ITER: The effect of castellation shaping and alignment on fuel retention and impurity deposition in gaps
Investigations of castellated structures for ITER: The effect of castellation shaping and alignment on fuel retention and impurity deposition in gaps
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DOI：
10.1016/j.jnucmat.2009.01.097
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发表时间：
2009-06
影响因子：
3.1
通讯作者：
A. Litnovsky;P. Wienhold;V. Philipps;K. Krieger;A. Kirschner;D. Matveev;D. Borodin;G. Sergienko;O. Schmitz;A. Kreter;U. Samm;S. Richter;U. Breuer;T. Team
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文献类型：
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作者：
A. Litnovsky;P. Wienhold;V. Philipps;K. Krieger;A. Kirschner;D. Matveev;D. Borodin;G. Sergienko;O. Schmitz;A. Kreter;U. Samm;S. Richter;U. Breuer;T. Team
将在偏滤器和第一壁组件中使用城堡形结构，以提供ITER的热机械稳定性。放射性燃料可能储存在城堡式结构的缝隙中，这对热核实验堆来说是一个安全问题。在TEXTOR中暴露了不同形状的钨蜂窝结构，以研究电池成形对间隙中杂质输运和燃料沉积的影响。暴露后，在间隙中的碳沉积物中检测到显著的钨混合，达到70at.%沉积层中的W。这将给ITER的间隙清理工作带来困难。形状电池的极向间隙比矩形电池的极向间隙含有少1倍或3倍的氘，碳沉积仅表现出新几何形状的边缘优势。极向隙和环形隙含有相当数量的C和D。测量了间隙底部的显著沉积，这只能部分地通过建模再现。
Castellation will be used in divertor and first wall components to provide thermo-mechanical stability of ITER. Radioactive fuel may be stored in the gaps of castellated structures representing a safety issue for ITER. Tungsten castellated structures with different shapes were exposed in TEXTOR to investigate the impact of cell shaping on impurity transport and fuel deposition in the gaps. After exposure a significant intermixing of tungsten was detected in carbon deposits in the gaps reaching 70at.% of W in the deposited layer. This will provide difficulties in cleaning the gaps in ITER. Poloidal gaps of shaped cells contained a factor or 3 less deuterium than those of rectangular cells, the carbon deposition exhibited only marginal advantages of a new geometry. Poloidal and toroidal gaps contained comparable amount of C and D. Significant deposition at the bottom of gaps was measured which could only partly be reproduced by modeling.