Abstract

We performed a preliminary study of neutron resonance absorption imaging to investigate the spatial distribution of constituent elements in borosilicate glasses containing simulated high-level radioactive waste, in which elemental inhomogeneities affect the physical and chemical stabilities of the glass. Dips generated by the resonance absorptions of Rh, Pd, Na, Gd, Cs, and Sm were observed in the neutron transmission spectra of the glass samples. The spatial distributions of these elements were obtained from the neutron transmission images at the resonance energies. The distributions of Rh and Pd visualized the sedimentation of these platinum group elements. In contrast, the lanthanides (Gd and Sm) and Cs were uniformly dispersed. These results show that neutron resonance absorption imaging is a promising tool for characterizing borosilicate glasses and investigating the vitrification mechanism of high-level radioactive waste.

Details

Title
Neutron resonance absorption imaging of simulated high-level radioactive waste in borosilicate glass
Author
Oba, Y. 1 ; Motokawa, R. 2 ; Kaneko, K. 2 ; Nagai, T. 3 ; Tsuchikawa, Y. 4 ; Shinohara, T. 4 ; Parker, J. D. 5 ; Okamoto, Y. 2 

 Japan Atomic Energy Agency, Materials Sciences Research Center, Tokai, Japan (GRID:grid.20256.33) (ISNI:0000 0001 0372 1485); Toyohashi University of Technology, Department of Mechanical Engineering, Toyohashi, Japan (GRID:grid.412804.b) (ISNI:0000 0001 0945 2394) 
 Japan Atomic Energy Agency, Materials Sciences Research Center, Tokai, Japan (GRID:grid.20256.33) (ISNI:0000 0001 0372 1485) 
 Japan Atomic Energy Agency, TRP Decommissioning Center, Tokai, Japan (GRID:grid.20256.33) (ISNI:0000 0001 0372 1485) 
 Japan Atomic Energy Agency, J-PARC Center, Tokai, Japan (GRID:grid.20256.33) (ISNI:0000 0001 0372 1485) 
 Comprehensive Research Organization for Science and Society (CROSS), Neutron R&D Division, Tokai, Japan (GRID:grid.472543.3) (ISNI:0000 0004 1776 6694) 
Pages
10071
Publication year
2023
Publication date
2023
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2828066751
Copyright
© The Author(s) 2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.