米国高速炉廃材を用いた照射下ミクロ組織の非破壊検査技術開発(1) 実験的検討
Development of non-destructive inspection technique for microstructuresunder irradiation using decommissioned materials(1) An experimental approach
著者:
匂坂 充行 Mitsuyuki SAGISAKA 江藤 淳二 Junji ETOH 松永 嵩 Takashi MATSUNAGA 枝川 文哉 Humiya EDAGAWA 礒部 仁博 Yoshihiro ISOBE 沖田 泰良 Taira OKITA
発刊日:
公開日:
backscatterfast reactorirradiation damagemicrostructurenon-destructive inspectionstructural materialultrasonic
概要
Development of methods of detecting degradation of irradiated reactor structural materials is required for successful operation of nuclear power plants. Ultrasonic waves, currently used as a non-destructive technique to detect cracks, change as a result of interacting with microstructural components and can be employed to measure radiation-induced changes in microstructure. Bulk-averaged measurements of microstructural changes can be determined usi ng ultrasonic velocity, attenuation and back-wall echo, while backscattering echoes can provide information on the depth-dependent profiles of microstructural changes. The result of quantitative evaluation of the relationship between the microstructure and the ultrasonic signal have a good agreement between ultrasonic measurements and the spatial variations in density changes, as well as swelling arising from microscopy-observed voids and carbides.
