Hydration process of nuclear-waste glass: an interim report

Bates, J. K.; Jardine, L.J.; Steindler, M. J.

doi:10.2172/6860386

Cited by 16 publications

(15 citation statements)

References 9 publications

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“…The current chemical durability approach focuses on a suite of short-term laboratory tests, such as dynamic flow-through tests (McGrail1992), static PCT (Jantzen 1992), and vapor hydration tests (Bates 1982). …”

Section: Chemical Durabilitymentioning

confidence: 99%

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Glass optimization for vitrification of Hanford Site low-level tank waste

Feng¹,

Hrma²,

Westsik³

1996

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Section: Chemical Durabilitymentioning

confidence: 99%

“…The vapor hydration test (Bates 1982;Ebert 1991) was used as an accelerated corrosion test to measure the long-term durability of the glasses. This test was performed in saturated water vapor at various temperatures.…”

Section: Vapor Hydration Testmentioning

confidence: 99%

Glass optimization for vitrification of Hanford Site low-level tank waste

Feng¹,

Hrma²,

Westsik³

1996

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“…The vapor hydration test developed at .' rgonne is a static test in which a monolithic sample is exposed to water vapor in a sealed vessel [104][105][106][107][108]. At relative humidities above about 80%, a thin film of water condenses on the sample in which the glass corrodes [41].…”

Section: Mcc-3 Solubility Testmentioning

confidence: 99%

“…For example, analcime (NaAlSiO 4 ) is a siliconconsuming phase that is typically formed early in the corrosion process. However, its formation has less effect on the corrosion rate in tests with glasses having low aluminum contents, such as PNL 76-68, than in tests with glasses having high aluminum contents, such as SRL 131, because much higher silicic acid concentrations can be maintained in the presence of analcime if the aluminum concentration is low [104]. In other words, the solution concentration of aluminum limits the formation of analcime.…”

Section: 5mentioning

confidence: 99%

“…Secondary phases precipitated on the surface are generally excluded from the measurement of the layer, since they are typically localized. Most high-level waste glasses tested to date have formed relatively uniform clay layers at the glass surface that were used to quantify the extent of corrosion [81, [104][105][106][107][108]. The relative amounts of secondary phases formed have also been used to compare the extents of reaction [109].…”

Section: Argonne National Laboratory Vapor Hydration Testsmentioning

confidence: 99%

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The effects of the glass surface area/solution volume ratio on glass corrosion: A critical review

Ebert

1995

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Argonne National Lahoratory. wi1th facilitie, in the states of liiinois and Idaho. is owned by the united States govern lent, and operated by The Un diversity of Chicago under the provisions of a contract with thie department of Enery. DISCLAIM ER THE FFFECTS OF THE GLASS SURFACE AREA/SOLUTION VOLUME RATIO ON GLASS CORROSION: A CRITICAL REVIEW William L. Ebert ABSTRACTThis report reviews and summarizes the present state of knowledge regarding the effects of the glass surface area/solution volume (SA/V) ratio on the corrosion behavior of borosilicate waste glasses. The SA/V ratio affects the rate of glass corrosion through the extent of dilution ok corrosion products released from the glass into the leachate solution: glass corrosion products are diluted more in tests conducted at low SA/V ratios than they are in tests conducted at high SAN ratios. Differences in the solution chemistries generated in tests conducted at different SA/V ratios then affect the observed glass corrosion behavior. Corrosion of borosilicate waste glasses results in the dissolution of soluble components and the accumulation of sparingly soluble components in a layer on the surface of the corroding glass. Laboratory tests performed to distinguish the effects of the solution chemistry and the surface layer on the glass corrosion rate have shown the rate to be controlled primarily by the solution chemistry. Therefore, any testing parameter that affects the solution chemistry will also affect the glass corrosion rate. The results of static leach tests conducted to assess the effects of the SAN are discussed with regard to the effects of SAN on the solution chemistry. The effects of the SA/V ratio observed in static tests can be understood based on the effects of the solution chemistry on glass corrosion behavior. Test results show several remaining issues with regard to the long-term glass corrosion behavior: Can the SAN ratio be used as an accelerating parameter to characterize the advanced stages of glass corrosion relevant to long disposal times? Is the alteration of the glass surface the same in tests conducted at different SAN, and in tests conducted with monolithic and crushed glass samples? What are the effects of the SAN and the extent of glass corrosion on the disposition of released radionuclides? These issues will bear on the prediction of the long-term performance of waste glasses during storage. The results of an experimental program conducted at ANL to address these and other remaining issues regarding the effects of SA/V on glass corrosion are described. I 2 SUMMARYThis report reviews and summarizes the present state of knowledge regarding the effects of the glass surface area/solution volume ratio (SA/V) on the corrosion behavior of borosilicate waste glasses. The effects of the SA/ occur through dilution of corrosion products and through the effects of the corrosion products on the glass corrosion mechanism and rate. Therefore, the effects of the SA/V on glass corrosion are discussed in terms of the various effects of t...

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