Influence of the content of radioactive wastes with high concentrations of aluminum, sodium, and iron oxides on the phase composition and structure of glassy materials prepared in a “cold crucible”

Stefanovsky, S. V.; Лебедев, В. В.; Suntsov, D. Yu.; Никонов, Б. С.; Omel’yanenko, B. I.; Akatov, A. A.; Marra, James C.

doi:10.1134/s108765961004005x

Cited by 4 publications

(7 citation statements)

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“…The tentative assignment of the bands is shown in Table 4. Detailed interpretation of the bands is given in our previous works [3][4][5][6][7][8][9]12]. The B 3 ⎯O⎯B 3 valence vibrations are revealed in the range from 1500 to 1300 cm -1 , and vibrations of the B 3 ⎯Obonds in the complex boron oxygen groups with tri ple coordinated boron are displayed in the range from 1300 to 1200 cm -1 [23].…”

Section: Resultsmentioning

confidence: 99%

“…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.…”

Section: Methodsmentioning

confidence: 99%

“…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].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2015

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The oxidation states and coordination environment of iron ions in borosilicate glass used for the immobilization of iron containing radioactive waste are studied by the methods of Mössbauer and Fourier transform IR spectroscopies. In homogeneous glass, containing no more than 50 wt % of waste oxides, iron is present in the form of Fe 3+ and Fe 2+ ions in octahedral coordination with oxygen. The phase of a iron con taining spinel, in which iron atoms with an oxidation number of +3 in the magnetically ordered state sur rounded tetrahedrally by oxygen atoms (Fe 3+ O 4 ) and iron in the two and trivalent states in the octahedral oxygen environment (Fe 3+ O 6 + Fe 2+ O 6 ) are present, is precipitated at higher waste concentrations. Both the Mössbauer and IR spectra of glass crystalline materials are combinations of the corresponding individual spectra. The quantitative ratio of the doubly and triply charged iron ions in samples depends on the synthesis conditions. The maximum fraction of iron in the glass phase (about 28%) and, at the same time, the maxi mum fraction of the Fe 3+ ions (91.3%) are observed in the sample prepared in a crucible by heating in a lab oratory furnace in the air environment and subsequent quenching on a metal sheet.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2015

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“…Several demonstrations of glasses with ceramic phases within them have been completed using CCIM technology [15,[23][24][25]. A CCIM has been used at full scale (crucible inside diameter = 418 mm with a melt height ~860 mm) in the former Soviet Union to make glass-ceramic waste forms from simulated Savannah River samples [24,25].…”

Section: Glass-ceramic Waste Form Productionmentioning

confidence: 99%

“…A CCIM has been used at full scale (crucible inside diameter = 418 mm with a melt height ~860 mm) in the former Soviet Union to make glass-ceramic waste forms from simulated Savannah River samples [24,25]. Several of these tests had waste loadings up to 60% wt.…”

Section: Glass-ceramic Waste Form Productionmentioning

confidence: 99%

Extended Development Work to Validate a HLW Calcine Waste Form via INL's Cold Crucible Induction Melter

King¹,

Maio²

2011

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To accomplish high level waste (HLW) calcine treatment objectives, the Idaho Clean-up Project contractor at the Idaho National Laboratory (INL), CWI, has chosen to immobilize the calcine in a glassceramic via the use of a Hot-Isostatic-Press (HIP). The choice for HIPing has been formally documented in a 2010 Record of Decision (ROD). Even though the HIP process may prove suitable for the calcine as specified in the ROD and validated in a number of past value engineering sessions, DOE is evaluating back-up treatment methods for the calcine as a result of the technical, schedule, and cost risk associated with the HIPing process. Consequently DOE-HQ has requested DOE-ID to make INL's bench-scale coldcrucible induction melter (CCIM) available for investigating its viability as a process alternate to calcine treatment.Providing a solid, stable, low volume and durable material that can be easily stored and/or disposed is the rationale for the immobilization of radioactive waste material (i.e. HLW calcine) in either a glass, ceramic, or glass-ceramic form. In addition, the waste form is the most controllable of the key components in immobilizing and isolating radioactive waste in a deep geological repository. In general ceramic and glass-ceramics waste forms offer an alternative to the traditional borosilicate glass HLW forms. Ceramics typically accommodate higher waste loadings than borosilicate glass, leading to smaller intermediate and long-term disposal facilities. Many ceramic phases are known to possess superior chemical durability as compared to borosilicate glass due to their similarity to natural analog minerals that geologically contain natural actinides. However, pure ceramics are generally multiphase systems containing many minor phases that make characterization and prediction of performance challenging within a repository environment. Therefore, many investigators have proposed using glass-ceramics as a compromise between the more inexpensive, easier to characterize glass waste forms and the more durable ceramic waste forms. Glass-ceramics have several advantages over traditional borosilicate glasses as a waste form. Borosilicate glasses can inadvertently denitrify, leading to a less durable product that could crack during cooling and unwanted crystals may be prone to dissolution. By designing glass-ceramics, the risks of deleterious effects from devitrification are removed. Glass-ceramics should provide a waste form with the advantages of both glass and ceramics-ease of manufacture (especially via the CCIM)-with improved mechanical properties, thermal stability, and chemical durability.The INL's bench-scale CCIM is a unique technology that is extremely well suited for the generation of all these types of waste forms, especially glass-ceramics. The CCIM's attributes, if validated through testing, may provide a calcine waste form and a corresponding waste process that results in high waste form durability, loading, throughput, and robustness; all of which may be equivalent or superior to the HIPing...

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Cluster mediated conversion of amorphous Al(OH)3 to γ-AlOOH

Baccarella

Garrard

Beauvais

et al. 2021

Journal of Solid State Chemistry

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Influence of the content of radioactive wastes with high concentrations of aluminum, sodium, and iron oxides on the phase composition and structure of glassy materials prepared in a “cold crucible”

Cited by 4 publications

References 3 publications

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

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

Extended Development Work to Validate a HLW Calcine Waste Form via INL's Cold Crucible Induction Melter

Cluster mediated conversion of amorphous Al(OH)3 to γ-AlOOH

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