Mechanical strength of various cyanate ester/epoxy insulation systems after fast neutron irradiation to the ITER design fluence and beyond
Mechanical strength of various cyanate ester/epoxy insulation systems after fast neutron irradiation to the ITER design fluence and beyond
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DOI：
10.1016/j.fusengdes.2007.06.024
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发表时间：
2007-10
期刊：
影响因子：
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通讯作者：
R. Prokopec;K. Humer;R. Maix;H. Fillunger;H. Weber
中科院分区：
文献类型：
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作者：
R. Prokopec;K. Humer;R. Maix;H. Fillunger;H. Weber
为了确保磁线圈的安全运行，绝缘系统必须在整个工厂寿命周期内保持其在伽马和快中子辐射环境中的机械强度。最近对氰酸酯(CE)/环氧树脂共混物在ITER设计影响1×1022m−2（E>0.1MeV）下辐照后的力学完整性进行了研究。出于经济原因，氰酸酯的含量应尽可能低，因为与传统环氧树脂相比，氰酸酯的价格较高。因此，氰酸酯与环氧树脂的最佳配比至关重要。研究了r型玻璃纤维/卡普顿增强氰酸酯/环氧共混物与不同环氧树脂及环氧含量的关系。在维也纳TRIGA反应堆环境温度（340K）下，在77K快中子通量1×1022and 2×1022m−2（E>0.1MeV）辐照前后进行了短束剪切和静态拉伸试验。此外，在载荷和应变控制模式下进行了张力-张力疲劳测量，以模拟ITER的脉冲运行条件。
To ensure secure operation of the magnet coils, the insulation system must keep its mechanical strength over the whole plant lifetime in a gamma and fast neutron radiation environment. Recent results on cyanate ester (CE)/epoxy blends demonstrated their mechanical integrity after irradiation to the ITER design fluence of 1×1022m−2(E>0.1MeV). For economic reasons, the cyanate ester content should be kept as low as possible due to the higher price compared to traditional epoxy resins. Therefore, the optimal composition of cyanate ester and epoxy is of great importance. In this study R-glass fiber/Kapton reinforced cyanate ester/epoxy blends with different epoxy resins and epoxy content were investigated. Short-beam shear and static tensile tests were carried out at 77K prior to and after irradiation to a fast neutron fluence of 1×1022and 2×1022m−2(E>0.1MeV), which was done in the TRIGA reactor (Vienna) at ambient temperature (340K). In addition, tension–tension fatigue measurements were performed in the load- and strain- controlled mode to simulate the pulsed operation conditions of ITER.