The effects of γ-radiation on model vitreous wasteforms intended for the disposal of intermediate and high level radioactive wastes in the United Kingdom

MCGANN, O.J., BINGHAM, Paul, HAND, R.J., GANDY, A.S., KAVČIČ, M., ŽITNIK, M., BUČAR, K., EDGE, R. and HYATT, N.C. (2012). The effects of γ-radiation on model vitreous wasteforms intended for the disposal of intermediate and high level radioactive wastes in the United Kingdom. Journal of Nuclear Materials, 429 (1-3), 353-367.

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Official URL: http://dx.doi.org/10.1016/j.jnucmat.2012.04.007
Link to published version:: 10.1016/j.jnucmat.2012.04.007

Abstract

The effect of γ-radiation on a variety of model vitreous wasteforms applied to, or conceived for, immobilisation of UK intermediate and high level radioactive wastes was studied up to a dose of 8 MGy. It was determined that γ-irradiation up to this dose had no significant effect upon the mechanical properties of the wasteforms and there was no evidence of residual structural defects. FTIR and Raman spectroscopy showed no evidence of radiation directly affecting the silicate network of the glasses. The negligible impact of this γ-irradiation dose on the physical properties of the glass was attributed to the presence of multivalent ions, particularly Fe, and a mechanism by which the electron–hole pairs generated by γ-irradiation were annihilated by the Fe2+–Fe3+ redox mechanism. However, reduction of sulphur species in response to γ-radiation was demonstrated by S K-edge XANES and XES data.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology
Identification Number: 10.1016/j.jnucmat.2012.04.007
Depositing User: Hilary Ridgway
Date Deposited: 22 Aug 2012 09:59
Last Modified: 21 Mar 2013 13:43
URI: http://shura.shu.ac.uk/id/eprint/5675

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