Interim storage is not long-term storage. The nuclear sites need interim storage facilities for the existing waste, that is an unavoidable fact. The argument for NIMBY will exist no matter where the waste is stored. Moving waste out of secure site facilities along public routes poses significant risk. Therefore on-site facilities are required and should be built to the highest degree of security and safety possible irrespective of cost.
CANDU reactor facilities are designed to be attack resistant therefore it stands that waste facilities should be no less reinforced.