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Design factor using a SiC/SiC composites for core component of gas cooled fast reactor, 1; Hoop stress

SiC/SiC複合材料を用いるガス冷却高速炉の炉心部材の設計要素,1; 円周応力

Lee, J.-K.; 永沼 正行

Lee, J.-K.; Naganuma, Masayuki

ガス冷却高速炉研究の一環として、ヘリウムガス冷却高速炉の炉心要素設計研究を行った。炉心要素の構造材料としてセラミックスが期待される中、特に炭化ケイ素繊維強化炭化ケイ素複合材料(SiC/SiC)は優れた特性を持っている。しかし、現在の高速炉設計要素はミーゼスの降伏条件のように金属の等方性をもとにしている。そこでセラミックス複合材料の特性を考慮した設計要素を研究し、その特徴を有限要素法で模擬した。改善した設計要素はGFRの炉心要素だけではなく、SiC/SiC複合材料の改善方向にも参考になると見積もられる。

As a part of the design study on Gas cooled Fast Reactor (GFR), core component designs of helium gas cooled fast reactor are being researched. The most promising structural materials of core components have been identified as ceramics, especially Silicon Carbide fiber reinforced Silicon Carbide matrix composites (SiC/SiC) have an encouraging characteristics. However, the existing design factors for Fast Breeder Reactor (FBR) was based on isotropic properties of metal, like a Mises yield criterion. Therefore, the design factors which are considered characteristics of ceramic composites was investigated and refined. The difference of result was compared by FEM analysis. Refined design factors are not only to design core components of GFR but also to indicate an improvement direction of SiC/SiC composites.

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