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FLD試験解析による破損クライテリアの検討

Evaluation of failure criteria based on FLD test and its simulation analysis

月森 和之*; 前田 純一*; 矢田 浩基 

Tsukimori, Kazuyuki*; Maeda, Junichi*; Yada, Hiroki

原子力プラント機器などにおいてバウンダリを形成する構造物について、シビアアクシデント(SA)時の安全確保の観点から、そのバウンダリ機能維持限界が重要な関心事となる。本研究では、板金のプレス加工などで広く使われている成形限界線図(FLD: Forming Limit Diagram)に着目して、原子力プラント機器の主要構造材のひとつであるオーステナイトステンレス鋼についてFLD試験を実施し、合わせて試験のシミュレーション解析を実施し、破損クライテリアとしての適用性について検討した。

For the structural components which constitute a part of the boundary of the containment vessel (CV) in FBR plants, it is a very important issue if the function as the boundary is maintained or not in the case of severe accident (SA). In this case, the criteria of boundary penetration are matters beyond the design criteria. One of the authors has paid his attention to FLD (Forming Limit Diagram) which is broadly used in the field of press-forming of sheet metal. In this study the experiments for FLD and their simulation analyses are implemented focusing on the austenitic stainless steel which is one of the main materials used for the equipment of nuclear plants for the discussion on the adoptability of FLD to the criteria of boundary penetration.

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