scholarly journals Post Emplacement Environment of Waste Packages

1983 ◽  
Vol 26 ◽  
Author(s):  
K. G. Knauss ◽  
V. M. Oversby ◽  
T. J. Wolery
Keyword(s):  
Water Chemistry ◽  
Geographic Location ◽  
High Level Waste ◽  
Nuclear Waste Storage ◽  
Waste Storage ◽  
Reaction Extent ◽  
Waste Repository ◽  
High Level ◽  
Water Ratio ◽  
Topopah Spring Tuff

ABSTRACTExperiments have been conducted as part of the Nevada Nuclear Waste Storage Investigations Project to determine the changes in water chemistry due to reaction of the Topopah Spring tuff with natural groundwater at temperatures up to 150°C. The reaction extent has been investigated as a function of rock-to-water ratio, temperature, reaction time, physical state of the samples, and geographic location of the samples within the tuff unit. Results of these experiments will be used to provide information on the water chemistry to be expected if a high level waste repository were to be constructed in the Topopah Spring tuff.

Formulation, Testing, and Structural Characterization of High-Zirconium High-Level Waste Glasses

1999 ◽  
Vol 556 ◽  
Author(s):  
David A. McKeown ◽  
Isabelle S. Muller ◽  
Andrew C. Buechele ◽  
Ian L. Pegg ◽  
Christopher A. Kendziora ◽  
...  
Keyword(s):  
High Level Waste ◽  
Borosilicate Glasses ◽  
Nuclear Waste Storage ◽  
Waste Storage ◽  
Potential Applications ◽  
High Level Nuclear Waste ◽  
High Level ◽  
A Minor ◽  
Zirconia Content

AbstractA range of compositions of high-zirconia borosilicate glasses were formulated and their structures investigated by a combination of techniques. These compositions have potential applications for high-level nuclear waste storage in combination with advanced reprocessing methods. Raman and Zr EXAFS data were collected for a series of glasses spanning a range of zirconia concentrations. The Raman spectra indicate that Zr acts as a silicate network modifier, where the silicate tetrahedral network depolymerizes as the zirconia content increases. Zr EXAFS analysis indicates that Zr is found in octahedral sites, and to a minor extent, sevencoordinated sites. As the zirconia content increases, the fraction of seven-coordinated Zr-sites increases; this may be the cause of ZrO2 baddeleyite crystallization that was observed in some Zr-rich glasses investigated.

Effects of Aging on the Solubility of Palladium

1995 ◽  
Vol 412 ◽  
Author(s):  
C. Oda ◽  
H. Yoshikawa ◽  
M. Yui
Keyword(s):  
Aqueous Solution ◽  
Aging Time ◽  
Room Temperature ◽  
High Level Waste ◽  
Anaerobic Conditions ◽  
Dilute Aqueous Solution ◽  
Waste Repository ◽  
Ph Range ◽  
Effects Of Aging ◽  
High Level

AbstractPalladium solubility was measured in a dilute aqueous solution at room temperature in the pH range from 3 to 13 under anaerobic conditions. Crystalline Pd metal was clearly visible and the concentration of palladium in solution decreased gradually with aging time. The palladium concentrations in solution were less than 9.4×10-10M in the pH range from 4 to 10 and increased to 10-7M in the pH range greater than 10. This study suggests that palladium concentrations in certain high-level waste repository environments may be limited by Pd metal and may be less than 10-9M.

Sign in / Sign up

Export Citation Format

Share Document