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

Research output: Contribution to journalArticlepeer-review

Authors

  • C. A. Stitt
  • C. Paraskevoulakos
  • A. Banos
  • N. J. Harker
  • K. R. Hallam
  • T. B. Scott

Colleges, School and Institutes

External organisations

  • European Synchrotron Radiation Facility
  • University of Bristol
  • Imperial College London

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.

Details

Original languageEnglish
Article number7999
JournalScientific Reports
Volume7
Issue number1
Publication statusPublished - 11 Aug 2017

ASJC Scopus subject areas