Tome Architecture and management of a geological repository - Andra

4 - General architecture of the repository in a granite mediumFigure 4.3.3Broken muck transport diagram4.4 Operational safetyAs with all other industrial installations, the various repository activities (construction, operation,closure, and any package retrieval) may induce risks for man and the environment.Incorporating these risks from the installation design stage leads to defining the operational safetyfunctions and the suitable technical means to minimise the risks of occupational and public exposure.Any potentially dangerous situations should be identified as part of an in-depth defence approach, atthe same time as the installations are being designed. Measures should be put forward to prevent theiroccurrence and limit their effects, even if they appear fairly unlikely. This analysis benefits fromfeedback from the nuclear and mining industries.Identifying the risks for a repository study in a granite medium is carried out in a generic context byhighlighting the main risks. The studies carried out for research into a repository in a clay medium canlargely be transposed to the case of granite 9 . The research results obtained for the repository studies ina clay medium are quoted as often as necessary.9The risk analysis for a repository in a granite medium is comparable to the analysis carried out for a repository in a clay medium [19]. Afew additional features relate to the geological formation: risk of blocks falling, not only during construction but also during operation(in general, drifts will not be lined with concrete), water arrival (during the construction phase), etc.Dossier 2005 Granite - ARCHITECTURE AND MANAGEMENT OF A GEOLOGICAL REPOSITORY83/228