Enhanced Hanford High-Fluoride Waste Glass Property Data Development: Phase 1

Technical Report · Sun Oct 01 04:00:00 EDT 2023

DOI:https://doi.org/10.2172/2217543· OSTI ID:2217543

Russell, Renee L. ^[1]; Kim, Dong Sang ^[1]; Vienna, John D. ^[1]; Lang, Jesse B. ^[1]; Baird, Suzanne M. ^[1]; Bellofatto, Diana L. ^[1]; Sannoh, Sulaiman E. ^[1]; Cutforth, Derek A. ^[1]; Westman, Bjorn E. ^[1]

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1. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

This study focused on investigating the effects of fluorine concentration on simulated high-level waste glass properties to eventually establish a fluorine limit (as a single-component or multiple-component constraint) for glass formulations for high-fluoride Hanford wastes. This is a first step to provide data to understand the impacts of changing flowsheets on the mission duration and extent. A test matrix of 20 high-fluoride glasses was generated, and the chemical compositions were measured. The following properties were measured and tested against current model predictions: crystal formation after centerline canister cooling, crystallinity as a function of temperature, density, viscosity, electrical conductivity, toxic leaching characteristics using the toxicity characteristic leach profile (TCLP), product consistency using the product consistency test (PCT), and SO₃ solubility. Overall, current models failed to adequately predict most of the properties, possibly due to differences in compositional space used to generate the models and the current test matrix. Additional work is needed to more accurately assess the impacts of high-fluoride wastes on Hanford processing, including additional data collection over a broader composition region and model development for the key models of interest such as PCT and TCLP.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 2217543
• Report Number(s): PNNL--35037; EWG-RPT-043
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
42 ENGINEERING