2016
DOI: 10.1038/srep25499
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Self-healing capacity of nuclear glass observed by NMR spectroscopy

Abstract: Safe management of high level nuclear waste is a worldwide significant issue for which vitrification has been selected by many countries. There exists a crucial need for improving our understanding of the ageing of the glass under irradiation. While external irradiation by ions provides a rapid simulation of damage induced by alpha decays, short lived actinide doping is more representative of the reality. Here, we report radiological NMR experiments to compare the damage in International Simplified Glass (ISG)… Show more

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Cited by 43 publications
(56 citation statements)
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“…The decrease of 8.9% in the proportion of BO 4 groups in the rapidly quenched glass is closer to the one observed in radioactive ISG doped with 244 Cm (7%), 12 than to the decrease induced in ISG by heavy-ions (Au) irradiation (13%). 13 Furthermore, whereas a change in aluminum coordination and depolymerization was observed for the irradiated glass, 12 no such changes were observed either for 244 Cm doped ISG 13 or for the quenched fibers in this study. These results therefore support the use of rapid quenching to mimic the effects of self-irradiation in nuclear glasses.…”
Section: Discussionmentioning
confidence: 69%
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“…The decrease of 8.9% in the proportion of BO 4 groups in the rapidly quenched glass is closer to the one observed in radioactive ISG doped with 244 Cm (7%), 12 than to the decrease induced in ISG by heavy-ions (Au) irradiation (13%). 13 Furthermore, whereas a change in aluminum coordination and depolymerization was observed for the irradiated glass, 12 no such changes were observed either for 244 Cm doped ISG 13 or for the quenched fibers in this study. These results therefore support the use of rapid quenching to mimic the effects of self-irradiation in nuclear glasses.…”
Section: Discussionmentioning
confidence: 69%
“…11 However, glasses submitted to external heavy-ion irradiation, simulating the effect of the recoil nuclei, show more significant effects than those seen in 244 Cm doped glasses. 12,13 This behavior was attributed to the local annealing induced by the alpha particle's loss of electronic energy that partially repairs the damages generated by the recoil nuclei. 14 Structural changes induced by self-irradiation could in particular affect the alteration behavior of glass matrices.…”
Section: Introductionmentioning
confidence: 99%
“…Al K-edge could not be investigated as the lowest beamline energy available on MARS is around 3.5 keV, to be compared to the 1.5 kev absorption edge threshold for Al K-edge. Furthermore, a recent NMR study on the same glass [14] shows that there is no structural evolution around Al species between the damaged glass and the annealed one.…”
Section: Introductionmentioning
confidence: 95%
“…Apart from the measurements of macroscopic physical quantities, like density, hardness or mechanical properties [6], considering the radioactive nature of the samples, sparse experimental techniques are available to investigate the glass structure under self-irradiation condition such as vibrational Raman technique [7,8], X-Ray Fluorescence (XRF), X-ray Absorption Spectroscopy (XAS) [6,7,[9][10][11][12][13] and more recently Nuclear Magnetic Resonance (NMR) [14].…”
Section: Introductionmentioning
confidence: 99%
“…1 International Simple Glass (ISG) is a simplified model composition for a collaborative study of dissolution/corrosion mechanism of highlevel waste (HLW) glasses. [2][3][4] ISG has been intensively researched recently with studies focusing on its dissolution behavior under different conditions, 3,[5][6][7][8][9][10][11][12] its surface quality, 13 radiation effect, [14][15][16][17][18] waste loading, 19 mechanical property, 20,21 and especially on the properties of its alteration layers using diverse techniques such as electron microprobe analysis, 22 Doppler broadening positron annihilation spectroscopy, 23 and atom probe tomography. 24 However, due to the lack of long-range periodicity, the structural study of glass materials exhibits many challenges.…”
Section: Introductionmentioning
confidence: 99%