Neutron resonance absorption imaging of simulated high-level radioactive waste in borosilicate glass

ホウケイ酸ガラス中の模擬高レベル廃棄物の中性子共鳴吸収イメージング

大場 洋次郎  ; 元川 竜平   ; 金子 耕士   ; 永井 崇之  ; 土川 雄介 ; 篠原 武尚   ; Parker, J. D.*; 岡本 芳浩  

Oba, Yojiro; Motokawa, Ryuhei; Kaneko, Koji; Nagai, Takayuki; Tsuchikawa, Yusuke; Shinohara, Takenao; Parker, J. D.*; Okamoto, Yoshihiro

The spatial distribution of constituent elements in borosilicate glasses containing simulated high-level radioactive liquid waste (HLLW) was investigated using neutron resonance absorption imaging. The resonance absorption dips of Rh, Pd, Na, Gd, Cs, and Sm were detected in the neutron transmission spectra of the glass samples. The neutron transmission images at the resonance energies of these elements provided the spatial distributions within the glass samples. Rh and Pd led sedimentation, while Gd, Sm, and Cs were uniformly dispersed. These results clearly show the potential of neutron resonance absorption imaging for characterizing borosilicate glasses.