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Interactions between Simulant Vitrified Nuclear Wastes and high pH solutions: A Natural Analogue Approach

  • Colleen Mann (a1), Clare Thorpe (a1), Antoni E. Milodowski (a2), Lorraine P. Field (a2), Richard P. Shaw (a2), Luke Boast (a1), Russell Hand (a1), Neil C. Hyatt (a1), John L. Provis (a1) and Claire L. Corkhill (a1)...

Abstract

This study details the characterization of a glass sample exposed to hyperalkaline water and calcium-rich sediment for an extended time period (estimated as 2 - 70 years) at a lime (CaO) waste site in the UK. We introduce this site, known as Peak Dale, in reference to its use as a natural analogue for nuclear waste glass dissolution in the high pH environment of a cementitious engineered barrier of a geological disposal facility. In particular, a preliminary assessment of alteration layer chemistry and morphology is described and the initiation of a long-term durability assessment is outlined.

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