Architecture and management of a geological repository - Andra

11 – Operational SafetyThe risks are characterised by a source of danger and risk reduction measures. The latter comprisepreventive measures to prevent or minimise the occurrence of risk, as well as protective measures thatare taken to rule out or mitigate the effects (cf. Figure 11.2.1). Monitoring measures complete the riskreduction measures.initiating event with effect on staff, the publicor the environment= RiskSource of dangerCausesProtectivemeasuresPreventivemeasuresFigure 11.2.1Risk characterisationThis characterisation enables a qualitative judgement to be made on the remaining degree of residualrisk in spite of the risk reduction measures proposed. This expert appraisal is carried out as a functionof the likelihood of the risk arising and the significance of its potential consequences for personnel,members of the public and the environment.11.2.2 Internal risks associated with the disposal processAll internal risks identified are presented by risk type distinguishing successively between"conventional" risks, which are typically common to all industrial installations, and radiological risks,which are associated with the presence of nuclear waste packages.11.2.2.1 Conventional risks• Listed risksThe main conventional risks to be taken into account during the disposal process [107] are the risk topersonnel of being crushed as a result of loads falling, falling blocks in drifts, objects falling downshafts, the risk of being crushed by equipment (crushed by a moving part during maintenanceoperations in shafts, etc.), the risk of being thrown from a vehicle, the risk of a collision betweenvehicles, the risk of a fall associated with work at heights (in the shafts in particular), the risk ofelectrocution and the risk of fire.Risks inherent in the working environment (noise, dust, carbon dioxide and carbon monoxide gasemitted by motors….) which are different from the above risks on account of their fairly long termeffect must also be monitored and controlled in underground installations in particular.DOSSIER 2005 ARGILE -ARCHITECTURE AND MANAGEMENT OF A GEOLOGICAL DISPOSAL SYSTEM443/495