Nuclear waste glass product consistency test (PCT), Version 5.0. Revision 2

Jantzen, Carol M.; Bibler, N.E.; Beam, D.C.; Ramsey, W.G.; Waters, Bill

doi:10.2172/10153301

Cited by 13 publications

(21 citation statements)

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“…These glasses have been used to derive correlations between glass corrosion rates and glass compositions that can be used during production of high-level waste glasses [74]. These glasses cannot be included in correlations based on boron release.…”

Section: Experimental Measures Of the Extent Of Glass Corrosionmentioning

confidence: 99%

“…The Product Consistency Test (PCT) [74] was developed for use at the DWPF to monitor the chemical durabilities of the glasses to be produced and assure that all waste forms exceed the benchmark measure of durability [99,100]. Variations of the PCT are used to monitor the product consistency (PCT method A) and to characterize the corrosion behavior (PCT method B).…”

Section: 512mentioning

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: Experimental Measures Of the Extent Of Glass Corrosionmentioning

confidence: 99%

Section: 512mentioning

confidence: 99%

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

Ebert

1995

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“…Both new and used vessels were cleaned before use, as outlined in the PCT procedure (Jantzen et al 1992). The cleaning process involved degreasing the test vessels, if new, followed by rinses in fresh DIW, a soak in 0.16 M HN03 at 90°C, and a number of rinses in fresh DIW.…”

Section: Test Vesselsmentioning

confidence: 99%

“…The WAPS requires that the relative chemical durability of the waste form shall be better than the Defense Waste Processing Facility (DWPF) Environmental Assessment (EA) glass standard reference material (Jantzen et al 1993), using the Product Consistency Test (PCT) (Jantzen et al 1992) as the comparative test.…”

Section: O Introductionmentioning

confidence: 99%

Product consistency testing of three reference glasses in stainless steel and perfluoroalkoxy resin vessels

Olson¹,

Smith²,

Marschman³

1995

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SummaryFour different types of vessels and three different glasses were used to study the possible effect of vessel composition on durability test results from the Product Consistency Test (PCT). The vessels were 45-mL 304L stainless steel vessels, 150-rnL 304L stainless steel vessels, and 60-mL perfluoroalkoxy (PFA) fluoropolymer resin vessels. The three glasses were the Environmental Assessment glass manufactured by Corning Incorporated and supplied by Westinghouse Savannah River Company, and West Valley Nuclear Services reference glasses 5 and 6, manufactured and supplied by Catholic University of America. Within experimental error, no differences were found in durability test results using the 3 different glasses in the 304L stainless steel or PFA fluoropolymer resin vessels over the seven-day test period.

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“…To develop durable high-sodium glasses in a reasonably short time and to supply data needed for modeling the glass's long-term performance, several short-term test methods, such as 7-day PCT (Product Consistency Test) (Jantzen 1992), 28-day Materials Characterization Center MCC-1 test (MCC 1986), single-pass flow-through test (McGraill992), and vapor-hydration test (Bates 1982, Ebert 1993, have been used. A long-term static test (up to one year using PCT) (Ebert 1993) is also being performed for selected glasses.…”

Section: Introductionmentioning

confidence: 99%

Preliminary PCT data on glass formulations developed for Hanford Site low-level wastes

Feng¹,

Schweiger²,

Hrma³

et al. 1995

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SUMMARY *Tank wastes stored at the Hanford Site are to be separated into high-level and low-level waste (LLW) fractions and vitrified for disposal (TPA 1994). The high content of Na,O in the LLW, averaging about 80 wt% on an oxide basis, necessitates the development of durable highsodium glasses. Pacific Northwest Laboratory (PNL) is providing glass formulations for the LLW vitrification program.The most important considerations for acceptable LLW waste glass compositions are the following: (1) the capability to incorporate high sodium content from LLW;(2) satisfactory long-term durability; and (3) proper processability, such as desired viscosity at melting temperature.

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Nuclear waste glass product consistency test (PCT), Version 5.0. Revision 2

Abstract: DE92 015893

Cited by 13 publications

References 0 publications

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

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

Product consistency testing of three reference glasses in stainless steel and perfluoroalkoxy resin vessels

Preliminary PCT data on glass formulations developed for Hanford Site low-level wastes

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