About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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Ceramics for a New Generation of Nuclear Energy Systems and Applications
|
Presentation Title |
Sulfur Retention of Low Activity Waste Glasses
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Author(s) |
Austin D. Stanfield, Jake W. Amoroso |
On-Site Speaker (Planned) |
Austin D. Stanfield |
Abstract Scope |
As a consequence of the high corrosivity of sulfate salts, models have been developed to mitigate sulfate segregation in Hanford Tank Waste Treatment and Immobilization Plant (WTP) melters, which rely on experimental data inputs. However, a disparity exists between the thermodynamic solubility limit in crucible-scale testing and the measured retained sulfur content in large scale test melters, with larger retention values corresponding to larger scale testing. A laboratory scale melter system was created to measure sulfur retention in simulated Hanford low-activity waste glass. The melter system is designed to simulate processing conditions, and was operated with simulants with matched physicochemical properties to melter feed, as opposed to reagent chemicals. This was undertaken to determine sulfur retention and elucidate the nature of the differences between crucible and melter testing. The resulting outcome should facilitate more applicable comparisons to be made between crucible melts and pilot-scale melts with the varied feed stocks. |