This title appears in the Scientific Report :
2022
Please use the identifier:
http://dx.doi.org/10.1111/jace.18678 in citations.
Please use the identifier: http://hdl.handle.net/2128/32452 in citations.
LnUO4‐based glass–ceramic composites as waste forms for the immobilization of lanthanide‐bearing uranium wastes
LnUO4‐based glass–ceramic composites as waste forms for the immobilization of lanthanide‐bearing uranium wastes
We report a comprehensive study on lanthanide monouranate–based glass–ceramic (GC) composites as potential waste forms for the immobilization of the lanthanide actinide fraction waste arising from the reprocessing of spent nuclear fuel (SNF). Although the crystalline LnUO4 precursor prepared via a n...
Saved in:
Personal Name(s): | Lu, Kimbal T. |
---|---|
Zhang, Yingjie (Corresponding author) / Wei, Tao / Murphy, Gabriel / Bhuiyan, Aurpa / Scales, Nicholas / Zheng, Rongkun | |
Contributing Institute: |
Nukleare Entsorgung; IEK-6 |
Published in: | Journal of the American Ceramic Society, 105 (2022) 12, S. 7697 - 7709 |
Imprint: |
Westerville, Ohio
Soc.
2022
|
DOI: |
10.1111/jace.18678 |
Document Type: |
Journal Article |
Research Program: |
Nuclear Waste Disposal |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/32452 in citations.
We report a comprehensive study on lanthanide monouranate–based glass–ceramic (GC) composites as potential waste forms for the immobilization of the lanthanide actinide fraction waste arising from the reprocessing of spent nuclear fuel (SNF). Although the crystalline LnUO4 precursor prepared via a nitrate route can be well stabilized in a sodium aluminoborosilicate glass, the in situ crystallization of EuUO4 in glass from oxide precursors (Eu2O3 and U3O8) is rather robust with regards to various processing conditions such as waste loadings, ceramic-to-glass ratios, and cooling rates. Scanning electron microscopy and transmission electron microscopy investigations revealed the detailed microstructures, where ∼1–5-μm spheres for NdUO4 and EuUO4, and ∼1–5-μm rectangular crystals for DyUO4 and HoUO4 were observed in residual glasses. As designed, the pentavalent uranium has been confirmed by diffuse reflectance spectroscopy. Overall, LnUO4-based GC composite waste forms are chemically durable, offering flexible processing options with wide operating windows for SNF and process waste stream management. |