Corrosion Behavior and Microstructure Influence of Glass-Ceramic Nuclear Waste Forms

CORROSION ◽  
10.5006/2449 ◽  
2017 ◽  
Vol 73 (11) ◽  
pp. 1306-1319 ◽  
Author(s):  
R. Matthew Asmussen ◽  
James J. Neeway ◽  
Tiffany C. Kaspar ◽  
Jarrod V. Crum



2019 ◽  
Vol 515 ◽  
pp. 227-237 ◽  
Author(s):  
James J. Neeway ◽  
R. Matthew Asmussen ◽  
Erin M. McElroy ◽  
Jacob A. Peterson ◽  
Brian J. Riley ◽  
...  


1998 ◽  
Vol 4 (S2) ◽  
pp. 560-561
Author(s):  
Edgar C. Buck

Secondary phases that form during the corrosion of nuclear waste forms may influence both the rate of waste form dissolution and the release of radionuclides [1]. The identification of these phases is critical in developing models for the corrosion behavior of nuclear waste forms. In particular, the secondary uranyl (VI) minerals that form during waste form alteration may control uranium solubility and release of radionuclides incorporated into these phases [2].The U6+ cation in uranyl minerals is almost always present as a linear (UO2)2+ ion [3]. This uranyl (Ur) ion is coordinated by four, five, or six anions (ϕ) in the equatorial plane resulting in the formation of square (Urϕ4), pentagonal (Urϕ5), and hexagonal (Urϕ6) bipyramids, respectively [3]. These bipyramid polyhedra may polymerize to form complex infinite sheet structures. The linking of Urϕ5 is observed in a number of uranyl minerals formed during waste glass and spent fuel corrosion [2,4], such as weeksite [Na,K(UO2)2(Si205)3*4H2O] and β-uranophane [Ca[(UO2)(SiO3OH)]2*5H2O].









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