Architecture and management of a geological repository - Andra

9 – Nuclear operating resources in the repositoryFigure 9.3.4Cell equipment• The shielded doors of the airlocksThe airlock is equipped with a "docking door" onto which the transfer transfer cask docks and "slidingdoors " separating off the irradiated part of the cell containing the packages.The "docking door" consists of two motorised sliding steel sections about 300 mm thick. The "slidingdoors " consist of sliding panels (steel plates about 300 mm thick) over the entire height of the cell.These panels are also responsible for allowing air through for ventilating the disposal chamber. At thisstage of the studies, there has been no detailed design work on these doors. However, large-sizeddoors (about 6 to 7 metres high and weighing about 30 tonnes) existent in the COGEMA installationson the La Hague site.• Moveable floor with turntableThe moveable floor supports the disposal truck. By means of its turning and sideways movement itenables the disposal truck to be positioned facing the transfer cask for extracting packages or facing arow of packages for the operation of transferring into the disposal chamber. It moves at right angles tothe disposal chamber on rails fixed to the floor.• The running tracksThe running tracks consist of metal rails. This system was preferred to a system on tyres because ittakes up little space that fits well with the dimensions of the grooves.DOSSIER 2005 ARGILE -ARCHITECTURE AND MANAGEMENT OF A GEOLOGICAL DISPOSAL SYSTEM349/495