Standard Leach Tests for Nuclear Waste Materials

Strachan, Denis M.; Barnes, B.K.; Turcotte, R.P.

doi:10.1007/978-1-4684-4040-9_44

Cited by 33 publications

(7 citation statements)

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“…The reference temperature is 90*C and the reference test time is 28 days, although temperatures of 40 or 70*C and other testing times can be used. (The MCC-2 test procedure is a variation of the MCC-I procedure for reaction temperatures greater than 90'C [86].) The measured solution concentrations of component species are used to monitor the extent of glass corrosion.…”

Section: 5mentioning

confidence: 99%

“…The PCT test described above is similar to the MCC-3 test, which was designed to measure the maximum solubility of a waste form in the solution of interest [86]. The MCC-3 test is a crushed glass test that originally specified that glass passing through a 325 mesh (about 40 sm) screen is to be reacted with a mass of solution ten times the mass of the glass.…”

Section: Mcc-3 Solubility Testmentioning

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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Section: 5mentioning

confidence: 99%

Section: Mcc-3 Solubility Testmentioning

confidence: 99%

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

Ebert

1995

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“…For example, the Materials Characterization Center test number 3 (MCC-3) was designed to measure the maximum "solubility" of a material by using crushed material of various size fractions (Strachan et al 1981). The product consistency test (PCT) for high-level radioactive waste glass is a variation of the MCC-3 test (ASTM 2006b) in which the amount of glass that dissolves within a fixed duration (7 days in PCT method A) is measured.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the results of short-term static tests and single-pass flow-through tests with LRM glass.

Ebert¹

2007

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“…The PCT method was selected because it is based on the MCC-3 test, 18 which was designed for this purpose. Tests were conducted at 90°C with crushed materials (-100+200 mesh fraction) in demineralized water with surface area to volume ( ) ratios of approximately 2300 and 23,000 m −1 .…”

Section: Testing Methodologymentioning

confidence: 99%