Large shielded industrial packages for the transport of intermediate level waste

A study of the factors which affect the design of large shielded containers for the transport of intermediate level waste from the decommissioning of nuclear power stations has been carried out culminating in the development of concepts for self shielded and returnable shielded industrial packages. The latter design is relatively insensitive to changes in disposal costs and is more adaptable to possible regulatory changes. Designs with an all-up weight of 65 t are described. A novel proposal is to make the walls of the inner disposable container of sprayed fibre-reinforced concrete. (author)