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Structural design problems related to plasma disruption events of the removable net first wall segments

Y.R. Crutzen, F. Farfaletti-Casali1989年Fusion Engineering and DesignIF 1.7出版社

During a major plasma disruption event, the structural components of the NET (Next European Torus) tokamak reactor are subjected to strong electromagnetic transient loads arising from the interaction of the induced eddy currents with large magnetic fields. In the NET design, relatively many removable internal segments facing the plasma are assembled from the top inside of the vacuum vessel. This paper considers the NET reference design aspects for the fastening and guiding systems of the removable internal segments and illustrates the structural analysis of the first wall modules, including the behaviour of their supports during a major plasma disruption. In particular, for three outboard segments, a complete transient dynamic numerical simulation of the first wall structure will be described using a thin shell formulation.

日本語訳

大規模なプラズマディスラプション事象の間、NET(次欧州トーラス)トカマク炉の構造部品は、誘導渦電流と大規模磁場との相互作用から生じる強い電磁過渡荷重にさらされる。NET設計では、プラズマに対向する比較的多くの取り外し可能な内部セグメントが真空容器の上部から組み立てられる。本論文では、NET参照設計における取り外し可能な内部セグメントの締結および案内システムについて考察し、大規模なプラズマディスラプション中のそれらの支持部の挙動を含む第一壁の構造解析を示す。特に、3つの外部セグメントについて、薄肉シェル定式化を用いた第一壁構造の完全な過渡数値シミュレーションを記述する。

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Plasma disruptionFirst wallNext European Torus
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