Cold Crucible Vitrification of SRS SB4 HLW Surrogate at High Waste Loadings

The structural state of iron in multicomponent aluminum iron borosilicate glass depending on their composition and synthesis conditions

“…(2) 21.5 (13) for multicomponent solid solutions with disordered cationic distribution. Partial contributions of the Fe(1) doublets allow one rather reliably (accurate to the Lemb-Mössbauer factor [20,21]) to estimate the abundance of differ ently charged iron forms in the sample (see Table 2).…”

“…The methods of preparation of glass material sam ples and the detailed characteristic of their phase com position, texture, and interphase distribution of ele ments are described in [3][4][5][6][7][8][9][10][11][12][13]. The samples prepared in the laboratory conditions (samples 1-4, Table 1), in the CCIM bench unit with a vibration power of 60 kW in a crucible with an internal diameter of 236 mm (samples 5-7, Table 1), and in the industrial CCIM plant of FSUE RADON with a vibration power of 160 kW in a crucible with an internal diameter of 418 mm (sample 8) [4,7,10,13] were used in the studies.…”

“…The samples prepared in the laboratory conditions (samples 1-4, Table 1), in the CCIM bench unit with a vibration power of 60 kW in a crucible with an internal diameter of 236 mm (samples 5-7, Table 1), and in the industrial CCIM plant of FSUE RADON with a vibration power of 160 kW in a crucible with an internal diameter of 418 mm (sample 8) [4,7,10,13] were used in the studies.…”

“…Intensive studies on the possibility of vitrification of the HLW surrogates of one of the sites of the US Department of Energy, containing iron (SB2) and simultaneously iron and aluminum (SB4), have been carried out earlier [2] in laboratory and industrial trial scales by using the technology of cold crucible induc tion melting (CCIM), which has been used in FSUE RADON since the middle of the 1980s for vitrification of intermediate level waste (ILW). The phase compo sition, structure, and some properties, especially, the hydrolytic durability, of the obtained glass materials were investigated in detail by the methods of electron microscopy and infrared spectroscopy [3][4][5][6][7][8][9][10][11][12][13].…”

XAFS Study of Fe K Edge in Al2O3-B2O3-Fe2O3-Na2O-SiO2 Glasses

“…During waste vitrification, iron may have a significant effect on phase composition of glassy materials (spinel formation), their structure and properties (viscosity, rheology, electric resistivity of glassmelts and chemical durability of glasses) [2][3][4]. Fe2O3 in the presence of MgO, MnO, FeO, CoO, NiO forms spinel-type phases which have no impact on chemical durability of borosilicate glasses [4][5][6][7]. In the glass structure Fe 2 O 3 can act similarly to Al 2 O 3 and retard conversion of tri-to four-coordinated boron (but typically to a less extent than Al2O3).…”