scholarly journals EQ6 Calculation for Chemical Degradation of Shippingport LWBR (TH/U Oxide) Spent Nuclear Fuel Waste Packages

2000 ◽  
Author(s):  
S. Arthur
Keyword(s):  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Chemical Degradation ◽  
Nuclear Fuel Waste

scholarly journals Depleted Uranium Oxides and Silicates as Spent Nuclear Fuel Waste Package Fill Materials

1996 ◽  
Vol 465 ◽  
Author(s):  
C. W. Forsberg
Keyword(s):  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Chemical Species ◽  
Fission Products ◽  
Depleted Uranium ◽  
Improve Performance ◽  
Waste Package ◽  
Reducing Conditions ◽  
Nuclear Fuel Waste

ABSTRACTA new repository waste package (WP) concept for spent nuclear fuel (SNF) is being investigated. The WP uses depleted uranium (DU) to improve performance and reduce the uncertainties of geological disposal of SNF. The WP would be loaded with SNF. Void spaces would then be filled with DU (∼0.2 wt % 235U) dioxide (UO2) or DU silicate-glass beads.Fission products and actinides can not escape the SNF UO2 crystals until the UO2 dissolves or is transformed into other chemical species. After WP failure, the DU fill material slows dissolution by three mechanisms: (1) saturation of WP groundwater with DU and suppression of SNF dissolution, (2) maintenance of chemically reducing conditions in the WP that minimize SNF solubility by sacrificial oxidation of DU from the +4 valence state, and (3) evolution of DU to lower-density hydrated uranium silicates. The fill expansion minimizes water flow in the degraded WP. The DU also isotopically exchanges with SNF uranium as the SNF degrades to reduce long-term nuclear-criticality concerns.

Long-Term Stability of Spent Nuclear Fuel Waste Packages in Gorleben Salt Repository Environments

1998 ◽  
Vol 121 (2) ◽  
pp. 174-188 ◽  
Author(s):  
Bernd Grambow ◽  
Andreas Loida ◽  
Emmanuel Smailos
Keyword(s):  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Term Stability ◽  
Long Term Stability ◽  
Nuclear Fuel Waste

Extraction and Reductive Stripping of Pertechnetate from Spent Nuclear Fuel Waste Streams

2011 ◽  
Vol 46 (3) ◽  
pp. 357-368 ◽  
Author(s):  
Ilya A. Shkrob ◽  
Timothy W. Marin ◽  
Dominique C. Stepinski ◽  
George F. Vandegrift ◽  
John V. Muntean ◽  
...  
Keyword(s):  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Waste Streams ◽  
Nuclear Fuel Waste ◽  
Reductive Stripping
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