In-situ, time resolved monitoring of uranium in BFS: OPC grout. Part 2: Corrosion in water

Research output: Contribution to journalArticle

Authors

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

Colleges, School and Institutes

External organisations

  • BRISTOL UNIVERSITY
  • European Synchrotron Radiation Facility

Abstract

To reflect potential conditions in a geological disposal facility, uranium was encapsulated in grout and submersed in de-ionised water for time periods between 2-47 weeks. Synchrotron X-ray Powder Diffraction and X-ray Tomography were used to identify the dominant corrosion products and measure their dimensions. Uranium dioxide was observed as the dominant corrosion product and time dependent thickness measurements were used to calculate oxidation rates. The effectiveness of physical and chemical grout properties to uranium corrosion and mobilisation is discussed and Inductively Coupled Plasma Mass Spectrometry was used to measure 238U(aq) content in the residual water of several samples.

Details

Original languageEnglish
Article number9282
JournalScientific Reports
Volume8
Publication statusPublished - 18 Jun 2018

ASJC Scopus subject areas