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Allowable heat load on the edge of the ITER first wall panel beryllium flat tiles

机译：ITER第一壁板铍平瓦的边缘允许的热负荷

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Highlights ? Plasma facing components (PFC) are mainly designed to receive the heat load on the top (front) face of the armour. Some heat load deposition on lateral faces is unavoidable, because of component segmentation and port opening, as well as assembly or manufacture tolerance. Surface shaping and component shadowing mitigates the edge heat load to a certain extent, but edge heat load still occur both at the global (component to component) and/or local (tile to tile) scales. ? This work focuses on establishing power allowable for PFC edges. This is especially critical for water cooled components that uses flat bonded armour tiles to the heat sink, for ensuring the long-term integrity of the bond. The work is done on the context of flat tile concept, for the ITER fist wall being armoured with beryllium tiles. ? The edge heat load allowable is based mainly on experiments, as there is no engineering recognised damage criteria for bi-metallic bonds. An edge heat load criterion of 10% of the top (front) heat load at the incident surface is proposed and demonstrated by heat flux testing. Abstract Plasma facing components are usually qualified to a given heat load density applied at the top face of the armour tiles with normal incidence angle. When employed in tokamak fusion machines, heat loading on the tile sides is possible due to optimised shaping, that doesn't provide edge shadowing for all design situations. An edge heat load may occur both at the tile and component scales. The edge load needs to be controlled and quantified. The adequate control of edge heat loads is especially critical for water cooled components that uses armour tiles which are bonded to the heat sink, for ensuring the long-term integrity of the tile bonding. An edge heat load allowance criterion of 10% of the top heat load is proposed. The 10% criterion is supported by experimental heat flux tests.
机译：强调 ？面向等离子体的组件（PFC）主要用于接收铠装顶面的热负荷。由于部件分段和端口开口以及组装或制造公差，不可避免地会在侧面沉积一些热负荷。表面整形和组件遮挡在一定程度上减轻了边缘热负荷，但是边缘热负荷仍然在全局（组件到组件）和/或局部（平铺到瓷砖）规模上发生。 ？这项工作着重于建立PFC边缘允许的功率。这对于在散热器上使用扁平粘结铠装砖的水冷组件尤其重要，以确保粘结的长期完整性。这项工作是在扁平砖概念的背景下完成的，因为ITER拳头墙用铍砖装甲。 ？允许的边缘热负荷主要基于实验，因为尚无工程公认的双金属键损伤标准。提出了边缘热负荷准则，该准则是入射表面顶部（前部）热负荷的10％，并通过热通量测试进行了证明。摘要面向等离子体的组件通常适合于以法线入射角施加在装甲砖顶面上的给定热负荷密度。当用于托卡马克熔合机中时，由于优化的造型，可能会在瓷砖侧面施加热负荷，这不会在所有设计情况下都提供边缘阴影。边缘热负荷可能同时发生在瓷砖和组件比例尺上。边缘负载需要控制和量化。边缘热负荷的适当控制对于使用装在散热片上的装甲瓷砖的水冷组件至关重要，以确保瓷砖粘合的长期完整性。提出了边缘热负荷允许标准为最高热负荷的10％。实验热通量测试支持10％的标准。

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