Short communication on the Influence of the temperature between 30 and 70°C on the hydration of SON68 nuclear waste glass in a vapour phase

Jégou, Christophe; Narayanasamy, Sathya; Angeli, Frédéric

doi:10.1016/j.jnucmat.2020.152738

Cited by 7 publications

(3 citation statements)

References 8 publications

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“…If the gel layer were abraded at a much quicker rate than the pristine glass due to a lower density, this could result in an underestimation of the gel layer thickness. In another study on the vapor hydration of SON68 nuclear waste glass simulant, it was shown that the altered layer thickness could be underestimated by a factor of up to 4 from ToF-SIMS measurements 32 . Based on the ToF-SIMS results, it could be said that the addition of Ca in the QCa glass has an almost negligible effect on the vapor hydration rate.…”

Section: Vapor Phase Alterationmentioning

confidence: 99%

“…Some of these experimental data have been useful to develop geochemical, empirical or structure-based models to predict glass alteration rates, at least during specific alteration stages [18][19][20][21][22][23][24] . On the other hand, the studies investigating nuclear waste glass alteration in humid conditions (referred to as vapor hydration or vapor phase alteration) are relatively fewer [25][26][27][28][29][30][31][32] . A generalized understanding of the predominant glass alteration mechanisms in the vapor phase is yet to be achieved.…”

Section: Introductionmentioning

confidence: 99%

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Borosilicate glass alteration in vapor phase and aqueous medium

et al. 2022

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A Na-alumino-borosilicate glass and its Ca-doped counterpart were altered in vapor phase (98% relative humidity) and aqueous medium at 90 °C. Both the alteration media were enriched in 17O. Characterization of the altered samples pointed out some differences between glass alteration in aqueous medium and vapor phase in terms of the alteration kinetics, the effect of Ca-doping on glass chemical durability, the behavior of elements in the gel layer, and the structure of the gel layer. Some of the key results are the recondensation of boron in the gel layer formed in the vapor phase and the utility of Rotation Echo DOuble Resonance Nuclear Magnetic Resonance spectroscopy to qualitatively distinguish between signals from the pristine glass and hydrated gel layer within a sample that was not altered to the core. The results gave rise to inferences about glass alteration mechanisms in both the alteration media and the differences between them.

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Section: Vapor Phase Alterationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Borosilicate glass alteration in vapor phase and aqueous medium

et al. 2022

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“…Conventional energy is being replaced by nuclear energy, and these environments are usually accompanied by high corrosiveness [3][4][5]. In addition, the use of nuclear energy has made long-term nuclear waste management an important research topic [6,7]. One current solution for nuclear waste is to bury spent nuclear fuel in deep underground storage [8].…”

Section: Introductionmentioning

confidence: 99%

Experimental study of Cu/Fe underwater self-constrained explosive welding tube

Tian

Yang

et al. 2021

Science and Technology of Welding and Joining

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In this study, copper/steel composite tubes were produced by an underwater explosive welding process. Scanning electron microscopy, energy dispersive spectroscopy, electron backscatter diffraction and hardness tests were performed to analyse the microstructure and properties of the composite tubes. It was shown that by using an aqueous medium as a constraint, the inner tube cladding surface could be protected, shape distortion was reduced and the stringent requirements on the outer steel die were reduced. The results show that the copper/steel bond interface has a high-strength fine grain layer and that work hardening occurs near the interface after tube lamination.

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