National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Impact of Redox on Glass Durability: The Glass Selection Process.

DE2004827204

Publication Date	2004
Personal Author	Peeler, D. K.; Edwards, T. B.
Page Count	38
Abstract	Recent glass formulation activities have focused on developing alternative frit compositions for use with specific sludge batches to maximize melt rate and/or waste throughput. The general trend has been to increase the total alkali content in the glass through the use of a high alkali based frit, a less washed sludge, or a combination of the two. As a result, predictions of durability have become a limiting factor in defining the projected operating windows for the Defense Waste Processing Facility (DWPF) for certain systems. An additional issue for these high alkali glasses has been the effect of REDuction/OXidation (REDOX) on the durability of the glass. Recent analyses have indicated that the application of the durability model's value without consideration of the overall glass composition may lead to a more significant shift (larger magnitude) than needed.
Keywords	Glass Radioactive waste processing Durability Hydration Hydroxides Targets Sludges Corrosion resistance Waste forms Mathematical models Redox reactions Control systems Free energy
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Savannah River Technology Center, Aiken, SC.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200514

Impact of Redox on Glass Durability: The Glass Selection Process.

Impact of Redox on Glass Durability: The Glass Selection Process.
DE2004827204

Publication Date	2004
Personal Author	Peeler, D. K.; Edwards, T. B.
Page Count	38
Abstract	Recent glass formulation activities have focused on developing alternative frit compositions for use with specific sludge batches to maximize melt rate and/or waste throughput. The general trend has been to increase the total alkali content in the glass through the use of a high alkali based frit, a less washed sludge, or a combination of the two. As a result, predictions of durability have become a limiting factor in defining the projected operating windows for the Defense Waste Processing Facility (DWPF) for certain systems. An additional issue for these high alkali glasses has been the effect of REDuction/OXidation (REDOX) on the durability of the glass. Recent analyses have indicated that the application of the durability model's value without consideration of the overall glass composition may lead to a more significant shift (larger magnitude) than needed.
Keywords	Glass Radioactive waste processing Durability Hydration Hydroxides Targets Sludges Corrosion resistance Waste forms Mathematical models Redox reactions Control systems Free energy
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Savannah River Technology Center, Aiken, SC.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200514