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Accession Number DE13-1105966
Title Report-Melter Testing of New High Bismuth HLW Formulations VSL-13R2770-1.
Publication Date Jun 2013
Media Count 96p
Personal Author A. A. Kruger H. Gan I. L. Pegg K. S. Matlack S. Adams W. Kot
Abstract In previous work on Hanford High Level Waste (HLW) streams containing high concentrations of bismuth specified by the Office of River Protection (ORP), fully compliant, high waste loading compositions were developed and subjected to melter testing on the DM100 vitrification system (1). However, during heat treatment according to the Hanford Tank Waste Treatment and Immobilization Plant (WTP) HLW canister centerline cooling (CCC) curves, crucible melts of the high-bismuth glasses were observed to foam (1). Clearly, such an occurrence during cooling of actual HLW canisters would be highly undesirable. This result was confirmed on larger-scale testing under more prototypical conditions as the bismuth concentration increased over the course of testing (2). Testing was conducted on the DM1200 HLW Pilot Melter with a composition that was previously tested on the DM100 melter (1) and previously shown to foam during crucible-scale CCC heat treatment. The DM1200 tests evaluated foaming of glasses over a range of bismuth concentrations; the glass product was poured into temperature-controlled, 55-gallon drums with diameter that is close to that of the full-scale WTP HLW canisters in order to simulate full-scale CCC heat treatment. Crucible-scale tests were conducted with the high bismuth waste to investigate the causes of the observed foaming behavior and to remediate that behavior through glass formulation changes (2). That work resulted in modified glass formulations that retained high waste loadings with significantly reduced tendency to foam during cooling. The focus of the present work was to test these new glass formulations for the high bismuth waste on the DM100 melter system to determine their processing characteristics, confirm product glass properties, and to assess their tendency to foam while cooling.
Keywords Bismuth
Chemical composition
Heat treatment
High level radioactive wastes
Radioactive waste processing

Source Agency Technical Information Center Oak Ridge Tennessee
NTIS Subject Category 77G - Radioactive Wastes & Radioactivity
Corporate Author Department of Energy, Richland, WA. Office of River Protection.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1412
Contract Number N/A

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