Leaching behavior and characteristics of glass components and surrogate nuclides in radioactive vitrified waste forms

Yong Chil Seo, Sang Hoon Lee, Kyu Seong Lee, In Tae Kim, Joon Hyung Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Several vitrified waste forms were fabricated and characterized, which contain simulated radioactive waste incineration ash, and a long-term leaching test was conducted by an ISO method for 820 days to assess the chemical durability of vitrified waste forms. Two semi-empirical mechanism models were applied to find out the dominant leaching mechanism of glass elements. For glass elements, dissolution associated with diffusion was the dominant leaching mechanism and leaching characteristics also depend upon solubilities of components. A type of prediction model was applied to observe the long-term leaching behavior of major glass elements and surrogates. Diffusion coefficients and dissolution rate constants, the main parameters in the long-term prediction model, were obtained for glass elements and surrogate nuclides using experimental data for short and long-term periods. The model could be used to predict long-term behavior of such elements to observe and assess the stability of vitrified waste forms.

Original languageEnglish
Pages (from-to)1395-1404
Number of pages10
JournalEnvironmental Technology (United Kingdom)
Volume22
Issue number12
DOIs
Publication statusPublished - 2001 Dec 1

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Water Science and Technology
  • Waste Management and Disposal

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