The Integrated Project NF-PRO: Recent Advances in European Research on the Near-Field System

Sneyers, A.; Grambow, Bernd; ́n, Pedro Herna; Alheid, H.-J.; Aranyossy, Jean-Franc ̧ois; Johnson, L. H.

doi:10.1115/icem2007-7269

Cited by 2 publications

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“…The other Ca precipitate that was identified using micro-Raman and XRD was a simple calcite phase (CaCO 3 ). The powellite and the calcite phases have been shown to be able to structurally incorporate trivalent actinides such as Pu, Am, and Cm [34] and lanthanides such as La, Pr, and Nd [32,33].…”

Section: Surface Analysesmentioning

confidence: 99%

Vapor hydration of SON68 glass from 90°C to 200°C: A kinetic study and corrosion products investigation

Neeway

Abdelouas

Grambow

et al. 2012

Journal of Non-Crystalline Solids

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Section: Surface Analysesmentioning

confidence: 99%

Vapor hydration of SON68 glass from 90°C to 200°C: A kinetic study and corrosion products investigation

Neeway

Abdelouas

Grambow

et al. 2012

Journal of Non-Crystalline Solids

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“…There is, therefore, merit in performing large‐scale tests under controlled laboratory conditions so that the THM behaviour of the engineered barrier can be observed under well‐known initial and boundary conditions eluding the uncertainties of the natural system. This paper focuses on one such test: the ‘FEBEX mock‐up test’ 6, an ongoing heating experiment, at almost full scale, performed in the premises of CIEMAT laboratory in Madrid, in the context of the European projects FEBEX (Full‐scale Engineered Barriers Experiment 1) FEBEX II and NF‐PRO 7.…”

Section: Introductionmentioning

confidence: 99%

THM analysis of a large‐scale heating test incorporating material fabric changes

Sánchez

Gens

Olivella

2011

Num Anal Meth Geomechanics

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Engineered barriers are basic elements in the design of repositories for the isolation of high-level radioactive waste. This paper presents the thermo-hydro-mechanical (THM) analysis of a clay barrier subjected to heating and hydration. The study focuses on an ongoing large-scale heating test, at almost full scale, which is being carried out at the CIEMAT laboratory under well-controlled boundary conditions. The test is intensely instrumented and it has provided the opportunity to study in detail the evolution of the main THM variables over a long period of time. Comprehensive laboratory tests carried out in the context of the FEBEX and NF-PRO projects have allowed the identification of the model parameters to describe the THM behaviour of the compacted expansive clay. A conventional THM approach that assumes the swelling clay as a single porosity medium has been initially adopted to analyse the evolution of the test. The model was able to predict correctly the global THM behaviour of the clay barrier in the short term (i.e. for times shorter than three years), but some model limitations were detected concerning the prediction of the long-term hydration rate. An additional analysis of the test has been carried out using a double structure model to describe the actual behaviour of expansive clays. The double structure model explicitly considers the two dominant pore levels that actually exist in the FEBEX bentonite and it is able to account for the evolution of the material fabric. The simulation of the experiment using this enhanced model provides a more satisfactory reproduction of the long-term experimental results. It also contributes to a better understanding of the observed test behaviour and it provides a physically based explanation for the very slow hydration of the barrier.

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The Integrated Project NF-PRO: Recent Advances in European Research on the Near-Field System

Cited by 2 publications

References 0 publications

Vapor hydration of SON68 glass from 90°C to 200°C: A kinetic study and corrosion products investigation

Vapor hydration of SON68 glass from 90°C to 200°C: A kinetic study and corrosion products investigation

THM analysis of a large‐scale heating test incorporating material fabric changes

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