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Ionescu, E. (author), Tuca, C. (author), Stanga, D. (author), Deju, R. (author), Dragusin, M. (author)
The paper aims to present the methodology used for free release of the materials arising from the VVR-S reactor decommissioning, as well as some practical examples for this methodology. From decommissioning process of a nuclear reactor are arising important quantities of materials which are potential radioactive wastes. The role of the free...
conference paper 2016
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Kuo, V. (author)
There are great challenges gauging the relevance of knowledge, skills and competences (KSCs) provided in nuclear education and that of the industry needs. This is amplified by the difficulties within industry to efficiently identify the KSC typology depicted by the professional communities of practice (CoPs) within organizations. This study...
conference paper 2016
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Canzone, G. (author), Lo Frano, R. (author), Sumini, M. (author), Troiani, F. (author)
This work describes the issues related to the dismantling of the graphite pile of the 1st generation gas cooled reactor of Latina NPP (Italy). The retrieval of the graphite is a strategic matter for the decommissioning of this type of plant: the aim of this study is to describe and analyse the current approaches used to access the core and to...
conference paper 2016
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Brynych, V. (author), Kolomá, K. (author), Havlová, V. (author)
Results of radionuclide batch sorption experiments for Czech rock samples will be present on the poster. Sorption of radionuclides, relevant for deep geological repository (DGR) safety (137Cs, Se, U), will be studied on granitic rock material from DGR potential site.
conference paper 2016
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Sun, H. (author), Mašín, D. (author), Boháč, J. (author)
Compacted bentonite is often planned as an engineered barrier material between host rock and canister in nuclear waste disposal repositories thanks to its favourable swelling characteristics and low permeability. This study deals with the effects of initial dry density and vertical stress on the swelling behaviour of compacted bentonite under...
conference paper 2016
document
Sampietro, D. (author), Abarca, E. (author), Bayer, M. (author), Jordana, S. (author), Molinero, J. (author), Tanaka, T. (author), Hashimoto, S. (author), Iwatsuki, T. (author), Onoe, H. (author)
conference paper 2016
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Tomášová, Z. (author), Brynych, V. (author), Pospěchová, J. (author), Ecorchard, P. (author), Tolasz, J. (author)
The new synthesized material has been tested as a potential sorbent of uranium for the purpose of treating the liquid radioactive waste. The sorption batch-experiments were performed on polyamide material. The experiments revealed the ability of polyamide-GO to uptake uranium from the solution.
conference paper 2016
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Fauchille, A-L. (author), Hedan, S. (author), Valle, V. (author), Pret, D. (author), Cabrera, J. (author), Cosenza, P. (author)
A clay rock sample from the Tournemire Underground Research Laboratory (Averyon, France) was subjected to a fast desiccation in the laboratory, from 98 to 33% relative humidity. At the millimetre scale, fracture locations were identified and desiccation strains and fracture apertures were calculated by digital image correlation on a surface of 5...
conference paper 2016
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Molinero Guerra, A. (author), Mokni, N. (author), Cui, Y-J. (author), Tang, A.M. (author), Delgade, P. (author), Aimedieu, P. (author)
The MX80 powder/pellets mixture is one of the candidate sealing plugs used in deep radioactive waste disposal because of its swelling properties and operational advantages (lower compaction effort, reduced gaps between the rock and the seal). The present work focuses on the microscopic scale of the material, which is studied using several...
conference paper 2016
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Barátová, D. (author), Nečas, V. (author)
The results on the analysis of radionuclide release from the geosphere of hypothetical repository in crystalline rocks are presented. Radionuclides with poor retentive properties (C-14, I-129, Cl-36, Cs-135), represent the largest contribution to the total release rate from the geosphere. The release rates of radionuclides with low solubility...
conference paper 2016
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Klaver, J. (author), Schmatz, J. (author), Desbois, G. (author), Hemes, S. (author), Urai, J.L. (author)
Characterization of the microstructure and pores in fine-grained geo-materials like mudstones is challenging because of their heterogeneity and small pore sizes. Combining Broad Ion Beam (BIB) polishing and Scanning Electron Microscopy (SEM) enables the visualization of microstructure and pores from millimetres down to a few nanometres in size....
conference paper 2016
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Ghiadistri, G.M. (author)
A numerical study of MX-80 bentonite confined hydration has been carried out. The results have been analysed in the light of the limits of applicability of the constitutive model used, a modified Barcelona Basic Model, and the available experimental data to characterise the material.
conference paper 2016
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Shrestha, R. (author), Steinová, J (author), Falteisek, L (author), Vlková, D. (author), Ševců, A. (author)
World-wide appreciated strategy for the management and treatment of high level and long lived radioactive waste is to dispose it in a deep and stable geological formation. Microbial community present in the host or buffer material may compromise the effective performance and safety of waste disposal system. In the Czech Republic, bentonite from...
conference paper 2016
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Li, Y. (author), Vardon, P.J. (author), Hicks, M.A. (author)
A preliminary probabilistic study of the stability of a circular drift excavated for a radioactive waste repository in the French Callovo-Oxfordian claystone is presented and discussed. An analytical mechanical model assuming isotropic elastic behaviour and linear plastic softening was used. Particular emphasis here is placed on the uncertainty...
conference paper 2016
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Fauchille, A-L. (author), Hedan, S. (author), Valle, V. (author), Pret, D. (author), Cabrera, J. (author), Cosenza, P. (author)
In the laboratory, the desiccation fracture apertures in Tournemire clay rock were investigated at different scales (millimetre and centimetre) and compared to the variations of the average water content and mean strains of the sample. The induced hydric strains and desiccation fractures were monitored by digital image correlation (H-DIC). At...
conference paper 2016
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Zaffora, B. (author), Magistris, M. (author)
conference paper 2016
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Becker, M. (author), Lippold, H. (author)
The preferred method for the storage of spent nuclear fuel (HLW) is the disposal in deep geological formations. The repository will consist not only of the geological barrier but also of an engineered barrier and has to isolate the waste for at least 106 years from the biosphere [1]. In this barrier, several materials like concrete or bentonite...
conference paper 2016
document
Fisher, A.J. (author), Corkhill, C.L. (author), Hand, R.J. (author), Hyatt, N.C. (author)
We present the results of an investigation of a kinetic analysis of the dissolution of the International Simple Glass (ISO), a reference high level waste (HLW) simulant base glass used by a collaborative group of nations interested in the advancement of glass dissolution knowledge. Using the Single-Pass-Flow-Through (SPFT) method we have...
conference paper 2016
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Liu, Z. (author), Shao, J. (author), Tang, Y. (author)
An experimental study was carried out on the time-dependent mechanical and transport behaviors of the Callovo-Oxfordian (Cox) argillite, the geological barriers for high-level radioactive waste disposal in France. Six coupled one-step creep tests under the same confining pressure 6MPa and different deviatoric stresses were proposed to...
conference paper 2016
document
Rawat, A. (author), Baille, W. (author), Schanz, T. (author)
The deep geological disposal concept is considered as a viable option for permanent disposal for high level radioactive waste. In this concept, the waste canisters are buried in a stable geological media with multi layer engineered barriers. The functionality of each component of such engineered barrier systems must be ensured for entire design...
conference paper 2016
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