scholarly journals Results from Phase 5 Study on Nepheline Formation in High-Level Waste Glasses Containing High Concentrations of Alumina

2018 ◽  
Author(s):  
Jared O. Kroll ◽  
John D. Vienna ◽  
Zayne J. Nelson ◽  
Chloe H. Skidmore
Keyword(s):  
High Level Waste ◽  
High Concentrations ◽  
High Level

Liquidus Temperature Model for Hanford High-Level Waste Glasses with High Concentrations of Zirconia

1996 ◽  
Vol 465 ◽  
Author(s):  
J. V. Crum ◽  
M. J. Schweiger ◽  
P. Hrma ◽  
J. D. Vienna
Keyword(s):  
Crystalline Phase ◽  
Liquidus Temperature ◽  
Heat Treating ◽  
Primary Phase ◽  
High Level Waste ◽  
Mass Fractions ◽  
High Concentrations ◽  
Phase Glass ◽  
High Level ◽  
Temperature Furnace

ABSTRACTA study was conducted on glasses based on a simulated transuranic waste with high concentrations of ZrO2and Bi2O3 to determine the compositional dependence of primary crystalline phases and liquidus temperature (TL). Starting from a baseline composition, glasses were formulated by changing mass fractions of Al2O3, B2O3, Bi2O3, CeO2, Li2O, Na2O, P2O5, SiO2, and ZrO2, one at a time, while keeping the remaining components in the same relative proportions as in the baseline glass. Liquidus temperature was measured by heat treating glass samples for 24 h in a uniform temperature furnace. The primary crystalline phase in the baseline glass and the majority of the glasses was zircon (ZrSiO4). A change in the concentration of certain components (Al2O3, ZrO2, Li2O, B2O3 and SiO2) changed the primary phase to baddeleyite (ZrO2), while cerium oxide (CeO2) precipitated from glasses with more than 3 wt% CeO2. Zircon TL was strongly increased by Al2O3, Zrb2 and CeO2, and slightly by P2O5 and SiO2; decreased strongly by Li2O and Na2O and moderately by B2O3. A first-order model was constructed for TL as a function of composition for zircon primary crystalline phase glass.

scholarly journals Results from Phase 1, 2, and 3 Studies on Nepheline Formation in High-Level Waste Glasses Containing High Concentrations of Alumina

2016 ◽  
Author(s):  
Jared Kroll ◽  
John Vienna ◽  
Michael Schweiger ◽  
Gregory Piepel ◽  
Scott Cooley
Keyword(s):  
Phase 1 ◽  
High Level Waste ◽  
High Concentrations ◽  
High Level

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.

Performance assessment of the disposal of vitrified high-level waste in a clay layer

2001 ◽  
Vol 298 (1-2) ◽  
pp. 125-135 ◽  
Author(s):  
Dirk Mallants ◽  
Jan Marivoet ◽  
Xavier Sillen
Keyword(s):  
Performance Assessment ◽  
High Level Waste ◽  
Clay Layer ◽  
High Level

Use of microwave energy in reprocessing of high-level waste

Atomic Energy ◽  
1992 ◽  
Vol 73 (3) ◽  
pp. 730-734 ◽  
Author(s):  
A. A. Kurkumeli ◽  
M. I. Molokhov ◽  
O. D. Sadkovskaya ◽  
V. I. Kononov ◽  
G. B. Borisov ◽  
...  
Keyword(s):  
Microwave Energy ◽  
High Level Waste ◽  
High Level
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