In-situ, time resolved monitoring of uranium in BFS:: OPC grout. Part 1: Corrosion in water vapour

C. A. Stitt; C. Paraskevoulakos; A. Banos; N. J. Harker; K. R. Hallam; A. Davenport; S. Street; T. B. Scott

doi:10.1038/s41598-017-08601-x

In-situ, time resolved monitoring of uranium in BFS: OPC grout. Part 1: Corrosion in water vapour

C. A. Stitt^*, C. Paraskevoulakos, A. Banos, N. J. Harker, K. R. Hallam, A. Davenport, S. Street, T. B. Scott

^*Corresponding author for this work

Metallurgy and Materials

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Abstract

Uranium encapsulated in grout was exposed to water vapour for extended periods of time. Through synchrotron x-ray powder diffraction and tomography measurements, uranium dioxide was determined the dominant corrosion product over a 50-week time period. The oxide growth rate initiated rapidly, with rates comparable to the U + H₂O reaction. Over time, the reaction rate decreased and eventually plateaued to a rate similar to the U + H₂O + O₂ reaction. This behaviour was not attributed to oxygen ingress, but instead the decreasing permeability of the grout, limiting oxidising species access to the metal surface.

Original language	English
Article number	7999
Journal	Scientific Reports
Volume	7
Issue number	1
DOIs	https://doi.org/10.1038/s41598-017-08601-x
Publication status	Published - 11 Aug 2017

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abstract = "Uranium encapsulated in grout was exposed to water vapour for extended periods of time. Through synchrotron x-ray powder diffraction and tomography measurements, uranium dioxide was determined the dominant corrosion product over a 50-week time period. The oxide growth rate initiated rapidly, with rates comparable to the U + H2O reaction. Over time, the reaction rate decreased and eventually plateaued to a rate similar to the U + H2O + O2 reaction. This behaviour was not attributed to oxygen ingress, but instead the decreasing permeability of the grout, limiting oxidising species access to the metal surface.",

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AU - Stitt, C. A.

AU - Paraskevoulakos, C.

AU - Banos, A.

AU - Harker, N. J.

AU - Hallam, K. R.

AU - Davenport, A.

AU - Street, S.

AU - Scott, T. B.

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N2 - Uranium encapsulated in grout was exposed to water vapour for extended periods of time. Through synchrotron x-ray powder diffraction and tomography measurements, uranium dioxide was determined the dominant corrosion product over a 50-week time period. The oxide growth rate initiated rapidly, with rates comparable to the U + H2O reaction. Over time, the reaction rate decreased and eventually plateaued to a rate similar to the U + H2O + O2 reaction. This behaviour was not attributed to oxygen ingress, but instead the decreasing permeability of the grout, limiting oxidising species access to the metal surface.

AB - Uranium encapsulated in grout was exposed to water vapour for extended periods of time. Through synchrotron x-ray powder diffraction and tomography measurements, uranium dioxide was determined the dominant corrosion product over a 50-week time period. The oxide growth rate initiated rapidly, with rates comparable to the U + H2O reaction. Over time, the reaction rate decreased and eventually plateaued to a rate similar to the U + H2O + O2 reaction. This behaviour was not attributed to oxygen ingress, but instead the decreasing permeability of the grout, limiting oxidising species access to the metal surface.

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In-situ, time resolved monitoring of uranium in BFS: OPC grout. Part 1: Corrosion in water vapour

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