Architecture and management of a geological repository - Andra

Figure 10.2.2Diagrammatic representation of the principal phenomena with a type B wastedisposal cell after inserting the disposal packagesTechnically this stage may last for several centuries, which represents the time during which the linerremains intact.Monitoring of the increase in the stresses in the liner using the observation devices fitted duringconstruction (see § 10.3.) is a means of regularly reassessing and more accurately predicting thelifetime. If it were required to prolong this stage over longer timescales, human intervention would benecessary, particularly in order to retrieve the packages and adapt the installations.10.2.1.2 “Post cell sealing” stageClosing the cell consists of stopping theventilation and sealing the cell’s accessdrift. Stopping the ventilation has animpact on the cell’s evolution; whereassealing the drift essentially onlyconcerns the evolution of the accessdrift and the seal itself.This closing action is an importantstage in the disposal process, as itreduces the accessibility of the wastepackages (see Figure 10.2.3) and makesit more difficult to continue to monitorthe cell. However, technical solutionsexist to continue monitoring the cell’sevolution (see section 10.3).Figure 10.2.3 Accessibility to the entrance of sealedaccess driftsDOSSIER 2005 ARGILE -ARCHITECTURE AND MANAGEMENT OF A GEOLOGICAL DISPOSAL SYSTEM372/495