migration

CONT: [...] évaluer le comportement à long terme des diverses barrières ouvragées devant s'opposer à la migration de la radioactivité vers l'homme [...]
CONT: On devra [...] solidifier les déchets et [...] utiliser [...] une ou plusieurs enveloppes constituant des barrières empêchant toute migration de la radioactivité [...]
CONT: [...] migration des radionucléides dans les divers types de sols [...]

CONT: Engineered barriers may ... limit the amount of waste that can become available to the environment by keeping migration-causing agents, such as water, from contacting the waste.
CONT: ... the concept of ""long-term storage"" ..., a modified form of disposal, would involve placing wastes in a facility in such a way that ... any migration of wastes from the facility could be monitored ...
CONT: Radionuclide migration ...