Factors Affecting Performance of Vitrified Wasteforms

by Hersh K. Manaktala, Cent for Nuclear Waste Regulatory, Analyses, San Antonio, United States,
Emil "Chuck" Tschoepe, III, Cent for Nuclear Waste Regulatory, Analyses, San Antonio, United States,
Prasad K. Nair, Cent for Nuclear Waste Regulatory, Analyses, San Antonio, United States,



Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1993

Abstract:

The acceptability and usefulness of mathematical models for predicting the performance of vitrified wasteforms can be enhanced by their validation using laboratory data generated under controlled conditions and other relevant information and data. The laboratory experiments used for validation should accurately represent the repository conditions, or the test conditions should lend themselves to being transformed to repository-relevant environmental regimes from which conclusions regarding long-term performance of the wasteform can be drawn. The majority of the literature reported experimental data were generated for the primary purposes of optimizing wasteform composition, rank-ordering of classes of waste-forms (e.g., vitrified, ceramic, cermet, etc.) based on their aqueous corrosion/leaching properties, developing standardized testing procedures (mainly aqueous leaching for assuring product consistency), and enhancing the general understanding of the properties of wasteforms. A detailed review of the literature shows the lack of certain types of experimental data. In some areas, the experimental data are currently unavailable, while in other areas they are scarce. Such areas require additional focused experimental effort. The paper identifies and discusses these areas.

Subject Headings: Waste management | Recycling | Radioactive wastes | Mathematics | Mathematical models | Ceramics | Waste disposal

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