The hydration of borosilicate waste glass in liquid water and steam at 200 °C

Ebert, W. L.; Bates, J. K.; Bourcier, William L.

doi:10.1016/0956-053x(91)90068-g

Cited by 50 publications

(29 citation statements)

References 5 publications

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“…These analyses of clay agree with previous tests with similar borosilicate glasses [5,6,10]. There was significant enrichment of Th, Zr, and P in the Si-rich layer in the WV6 glass.…”

Section: Iscussionsupporting

confidence: 81%

The Behavior of Silicon and Boron in the Surface of Corroded Nuclear Waste Glasses: An Eftem Study

Buck

Smith²,

Blackford³

1999

MRS Online Proceedings Library

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“…These analyses of clay agree with previous tests with similar borosilicate glasses [5,6,10]. There was significant enrichment of Th, Zr, and P in the Si-rich layer in the WV6 glass.…”

Section: Iscussionsupporting

confidence: 81%

The Behavior of Silicon and Boron in the Surface of Corroded Nuclear Waste Glasses: An Eftem Study

Buck

Smith²,

Blackford³

1999

MRS Online Proceedings Library

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“…Nevertheless, identification of the assemblage of secondary phases is crucial to long-term modeling, since these phases control the glass corrosion rate. Phases identified to form in vapor hydration tests are generally different than those predicted to form by computer simulation [111,112]. The difference is likely due to the fact that the phases found to form experimentally are generally those favored kinetically while the thermodynamically most stable phases are predicted to form in the computer models.…”

Section: Argonne National Laboratory Vapor Hydration Testsmentioning

confidence: 62%

“…Very high SAN ratios have also been attained by reacting monolithic samples in vapor at elevated temperatures [104,106-108,111,139]. In a vapor environment, reaction occurs in a thin film of condensed water, and highly concentrated solutions are generated after very little glass has ieacted [111]. Secondary phases that form in the leachate film remain on the sample surface, where they can be readily identified and cataloged.…”

mentioning

confidence: 99%

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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“…PCT-B tests highlight the effects of solution chemistry on glass corrosion, and long-term PCT-B tests can also provide information about secondary phase formation and long-term performance of the glass. Argonne National Laboratory vapor hydration (VH [2]) tests were used to determine the identities and order of appearance of secondary crystalline phases, information that is important to the long-term corrosion rate. These tests may indicate whether the presence of secondary crystalline phases increases the glass corrosion rate.…”

Section: Introductionmentioning

confidence: 99%