Community Research and Development Information Service - CORDIS


ESDRED Module 1 (Buffer construction technology) - Final report

Project ID: 508851


ESDRED Module 1 was principally dedicated to the construction and/or emplacement, in a horizontal configuration, of the buffer around a disposed high-level waste package. In addition, Module 1 aimed to test the performance of seals (saturation rate and gas permeability) and certain seal installation aspects, and to advance the state-of-the-art of the application of non-intrusive monitoring techniques in geological repositories. The partner organizations working within Module 1 on specific subjects were: ONDRAF/NIRAS (Belgium), ANDRA (France), NAGRA (Switzerland), GRS (Germany), EURIDICE (Belgium) and the NDA (United Kingdom).
R&D projects before ESDRED Module 1 had already studied several bentonite materials and their conditioning to investigate their application as key materials in buffers, backfill or seals in geological repositories (e.g. RESEAL in Mol, or BOS in Grimsel). Most of these projects had been performed on a small or intermediate scale, and only a few addressed the emplacement techniques related to these components. The demonstration testing at full scale that had been performed was essentially limited to the vertical disposal configuration (e.g. work by SKB related to the KBS-3V design). From studying these projects it was clear that the horizontal configuration would pose specific challenges that had not been sufficiently addressed. At the same time, the horizontal configuration was getting increased consideration in disposal concepts (reference or alternative) of a number of EU countries. Module 1 was therefore in the first place set up to advance the state-of-the-art of the technology relating to the construction of the buffer or the backfill around a horizontally disposed high-level waste package.

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