Application of X-ray computer tomography for observing the central void formations and the fuel pin deformations of irradiated FBR fuel assemblies

照射した高速炉燃料集合体内の燃料ピン変形及び中心空孔観察へのX線CT技術の適用

勝山 幸三 ; 永峯 剛; 古屋 廣高

Katsuyama, Kozo; Nagamine, Tsuyoshi; Furuya, Hirotaka

高速実験炉「常陽」で照射した炉心燃料集合体のX線CT試験を実施し、得られたCT断面像から燃料集合体内の燃料ピンの配置状況や燃料ペレット内の中心空孔形成状況を定量化した。

In order to observe the structural change in the interior of irradiated fuel assembly, the non-destructive post irradiation examination technique using X-ray computer tomography (X-ray CT) was developed. In this X-ray CT system, the 12 MeV X-ray pulses was used in synchronization with the switch-in of the detector to minimize the effects of the ray emissions from the irradiated fuel assembly, and then clear cross section CT image could be successfully obtained.