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

DOI: 10.1038/s41598-018-27636-2 DOI Help

Authors: C. A. Stitt (University of Bristol) , C. Paraskevoulakos (University of Bristol) , A. Banos (University of Bristol) , N. J. Harker (European Synchrotron Radiation Facility (ESRF)) , K. R. Hallam (University of Bristol) , H. Pullin (University of Bristol) , A. Davenport (University of Birmingham) , S. Street (University of Birmingham) , T. B. Scott (University of Bristol)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Scientific Reports , VOL 8

State: Published (Approved)
Published: June 2018
Diamond Proposal Number(s): 8336 , 9127

Open Access Open Access

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.

Journal Keywords: Corrosion; Nuclear waste

Subject Areas: Materials, Environment


Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

Documents:
s41598-018-27636-2.pdf