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Nuclear waste viewed in a new light; a synchrotron study of uranium encapsulated in grout.pdf
Journal of Hazardous Materials 285 (2015) 221–227
Contents lists available at ScienceDirect
Journal of Hazardous Materials
journal homepage: /locate/jhazmat
Nuclear waste viewed in a new light; a synchrotron study of uranium encapsulated in grout
C.A. Stitt a, M. Hart b, N.J. Harker a, K.R. Hallam a, J. MacFarlane a, A. Banos a, C. Paraskevoulakos a, E. Butcher c, C. Padovani d, T.B. Scott a,?
a Interface Analysis Centre, H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, United Kingdom b Diamond Light Source Limited, Harwell Science and Innovation Campus, Fermi Avenue, Didcot, Oxfordshire OX11 0QX, United Kingdom c National Nuclear Laboratory, Seascale, Cumbria CA20 1 PG, United Kingdom d Radioactive Waste Management Limited (formerly the Radioactive Waste Management Directorate of the UK Nuclear Decommissioning Authority), Curie Avenue, Didcot, Oxfordshire OX11 0RH, United Kingdom
highlights
? Unirradiated Magnox uranium was encapsulated in grout and exposed to hydrogen.
? Synchrotron X-ray tomography imaged the uranium corrosion before and after exposure.
? Synchrotron X-ray powder diffraction identi?ed the corrosion products; UH3 and UO2.
? Uranium encapsulated in grout oxidised via the anoxic U + H2O regime.
? Successful in-situ, non-invasive examination of pyrophoric and radioactive material
graphical abstract
article info
Article history: Received 1 August 2014 Received in revised form 22 October 2014 Accepted 25 November 2014 Available online 6 December 2014
Keywords: Uranium Grout Synchrotron X-ray tomography X-ray powder diffraction Uranium hydride
abstract
How do you characterise the contents of a sealed nuclear waste package without breaking it open? This question is important when the contained corrosion products are potentially reactive with air and radioactive. Synchrotron X-rays have been used to perform micro-scale in-situ observation and characterisation of uranium encapsulated in grout; a simulation for a typic
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