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Stability of Cs-Ionsiv in Portland cement blends for radioactive waste disposal

  • Neil Christian Hyatt (a1), Andreas Jenni (a2) and Martin Christopher Stennett (a3)

Abstract

The suitability of Portland cement blends for encapsulation of Cs-Ionsiv in a monolithic wasteform was investigated. No evidence of reaction or dissolution of the Cs-Ionsiv in the cementitious environment was found by scanning electron microscopy and X-ray diffraction. However, a small fraction (≤1.6 wt%) of the Cs inventory was released from the encapsulated Ionsiv during leaching experiments carried out on hydrated samples. Cs release was enhanced by exchange of K and Na present in the cementitious pore water. Cement systems lower in K and Na, such as slag based blends, showed lower Cs release than the fly ash based analogues.

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Keywords

Stability of Cs-Ionsiv in Portland cement blends for radioactive waste disposal

  • Neil Christian Hyatt (a1), Andreas Jenni (a2) and Martin Christopher Stennett (a3)

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