06/02293 Environment and oxidation state of molybdenum in simulated high level nuclear waste glass compositions

2006 ◽  
Vol 47 (5) ◽  
pp. 349
Keyword(s):  
Oxidation State ◽  
Nuclear Waste ◽  
Waste Glass ◽  
Nuclear Waste Glass ◽  
High Level Nuclear Waste ◽  
High Level ◽  
Glass Compositions

scholarly journals Method for estimating the density of high‐level nuclear waste glass

2020 ◽  
Vol 11 (4) ◽  
pp. 641-648
Author(s):  
Cory L. Trivelpiece ◽  
Thomas B. Edwards ◽  
Fabienne C. Johnson ◽  
Kimberly P. Crapse ◽  
Kevin M. Fox
Keyword(s):  
Nuclear Waste ◽  
Waste Glass ◽  
Nuclear Waste Glass ◽  
High Level Nuclear Waste ◽  
High Level

Nepheline Crystallization in High-Alumina High-Level Waste Glass

2015 ◽  
Vol 1744 ◽  
pp. 85-91 ◽  
Author(s):  
José Marcial ◽  
John McCloy ◽  
Owen Neill
Keyword(s):  
Nuclear Waste ◽  
Waste Glass ◽  
High Alumina ◽  
High Level Waste ◽  
Interfacial Conditions ◽  
Waste Vitrification ◽  
Cooling Schedules ◽  
High Level Nuclear Waste ◽  
High Level ◽  
Glass Compositions

ABSTRACTThe understanding of the crystallization of aluminosilicate phases in nuclear waste glasses is a major challenge for nuclear waste vitrification. Robust studies on the compositional dependence of nepheline formation have focused on large compositional spaces with hundreds of glass compositions. However, there are clear benefits to obtaining complete descriptions of the conditions under which crystallization occurs for specific glasses, adding to the understanding of nucleation and growth kinetics and interfacial conditions. The focus of this work was the investigation of the microstructure and composition of one simulant high-level nuclear waste glass crystallized under isothermal and continuous cooling schedules. It was observed that conditions of low undercooling, nepheline was the most abundant aluminosilicate phase. Further undercooling led to the formation of additional phases such as calcium phosphate. Nepheline composition was independent of thermal history.

An Investigation into the Oxidation State of Molybdenum in Simplifies High Level Nuclear Waste Glass Compositions

2003 ◽  
Vol 807 ◽  
Author(s):  
R. J. Short ◽  
R. J. Hand ◽  
N. C. Hyatt
Keyword(s):  
Oxidation State ◽  
Nuclear Waste ◽  
Photoelectron Spectroscopy ◽  
Redox State ◽  
X Ray ◽  
Reducing Atmosphere ◽  
Spin Resonance ◽  
High Level Nuclear Waste ◽  
High Level ◽  
Glass Compositions

The redox state of Mo in glasses containing simplified simulated high level nuclear waste (HLW) streams has been investigated using Electron Spin Resonance (ESR) and X-ray Photoelectron Spectroscopy (XPS). Melts performed in highly oxidising or neutral (air) atmospheres contained Mo6+, but our study indicates that the Mo can be at least partially reduced to Mo4+ or Mo3+ by melting in a reducing atmosphere. The implications for glasses containing a full simulated HLW stream are that the formation of detrimental crystalline phases containing Mo6+ upon heat treatment may be avoided by reducing the oxidation state of Mo during melting.

scholarly journals West Valley high-level nuclear waste glass development: a statistically designed mixture study

1984 ◽  
Author(s):  
L.A. Chick ◽  
W.M. Bowen ◽  
R.O. Lokken ◽  
J.W. Wald ◽  
L.R. Bunnell ◽  
...  
Keyword(s):  
Nuclear Waste ◽  
Waste Glass ◽  
Nuclear Waste Glass ◽  
High Level Nuclear Waste ◽  
High Level
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