ECOCLAY II: Effects of cement on clay barrier performance - phase II

• Unité de recherche: PCRD EU
• Numéro de projet: 99.0751-2
• Titre du projet anglais: ECOCLAY II: Effects of cement on clay barrier performance - phase II

Mots-clé (Anglais)

Strontium; Europium; Curium; sorption; co-precipitation; CSH phases; high pH plume; laser-induced fluorescence spectroscopy;
Nuclear Fission; Radioactive Waste; Safety

Autre Numéro de projet (Anglais)

EU project number: FIKW-2000-00028

Programme de recherche (Anglais)

EU-programme: 5. Frame Research Programme - 5.5.2 Nuclear fission

Description succincte (Anglais)

See abstract

Partenaires et organisations internationales (Anglais)

Coordinator: ANDRA, Chatenay-Malabry (F)

Résumé des résultats (Abstract) (Anglais)

Cements will be used intensively in radioactive waste repositories. During their degradation in time, in contact with geological pore water, they will release hyper-alkaline fluids rich in calcium and alkaline cations. This will induce geochemical transformations that will modify the containment properties of the different barriers (geological media and EBS, i.e. clay-based engineered barriers). ECOCLAY I identified major geochemical reactions between bentonite and cement. ECOCLAY II proposes to investigate aspects such as radionuclides sorption, kinetics of the geochemical reactions, coupled geochemistry / transport processes, conceptual and numerical modelling and performance assessment. The whole hyper-alkaline plume (EBS, clay and granite host rock) will be studied within the project. To do so, ECOCLAY II brings together the efforts of 8 European countries on this subject with an aim of supplementing studies.

Références bases de données (Anglais)

Swiss Database: Euro-DB of the
State Secretariat for Education and Research
Hallwylstrasse 4
CH-3003 Berne, Switzerland
Tel. [phone]
Swiss Project-Number: 99.0751-2