Water degradation of glass waste forms has been studied extensively under a variety of conditions including of bulk glass immersed completely in static or dynamic water. In practice, the vitrified nuclear waste cracks as soon as poured into a container because of differences in thermal expansion coefficients. In addition, in repository the canisters may be only partially immersed in water. Later, water condenses on the surface of glass which corrodes releasing ions. In this work experiments have been performed to understand these effects on the degradation of International Simple Glass (ISG). Simulated cracks were found to develop pitting corrosion in the crack openings when tested by immersing ISG in water. Under load, these pits concentrated stress and grew as large planar cracks inside the glass. The condensation of water on glass surfaces leads to formation of pits and growth of calcium silicate crystals.
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Forschungszentrum Julich, Ernst Ruska Ctr ER C 2, D-52425 Julich, GermanyForschungszentrum Julich, Inst Fus Energy & Nucl Waste Management IFN 2, D-52425 Julich, Germany
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Penn State Univ, Dept Chem Engn, University Pk, PA 16802 USA
Penn State Univ, Mat Res Inst, University Pk, PA 16802 USAPenn State Univ, Dept Chem Engn, University Pk, PA 16802 USA
Ngo, Dien
Liu, Hongshen
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Penn State Univ, Dept Chem Engn, University Pk, PA 16802 USA
Penn State Univ, Mat Res Inst, University Pk, PA 16802 USAPenn State Univ, Dept Chem Engn, University Pk, PA 16802 USA
Liu, Hongshen
Sheth, Nisha
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Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USAPenn State Univ, Dept Chem Engn, University Pk, PA 16802 USA
Sheth, Nisha
Lopez-Hallman, Raymond
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Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USAPenn State Univ, Dept Chem Engn, University Pk, PA 16802 USA
Lopez-Hallman, Raymond
Podraza, Nikolas J.
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Univ Toledo, Dept Phys & Astron, Toledo, OH 43606 USAPenn State Univ, Dept Chem Engn, University Pk, PA 16802 USA
Podraza, Nikolas J.
Collin, Marie
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CEA, DEN, DE2D, SEVT, F-30207 Bagnols Sur Ceze, Bagnols Sur Cez, FrancePenn State Univ, Dept Chem Engn, University Pk, PA 16802 USA
Collin, Marie
Gin, Stephane
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CEA, DEN, DE2D, SEVT, F-30207 Bagnols Sur Ceze, Bagnols Sur Cez, FrancePenn State Univ, Dept Chem Engn, University Pk, PA 16802 USA
Gin, Stephane
Kim, Seong H.
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Penn State Univ, Dept Chem Engn, University Pk, PA 16802 USA
Penn State Univ, Mat Res Inst, University Pk, PA 16802 USAPenn State Univ, Dept Chem Engn, University Pk, PA 16802 USA