The basic design goals for the SSiC supplementary barrier are:

  • simple geometric forms for ceramic components
  • robustness
  • position as near as possible to the initial barrier
  • preferably, a ceramic surface of the package.

We developed two concepts for the different waste forms in their initial packing:

  • monolithic canisters: for small SNF: HTR pebbles, compacts, CANDU, eventually consolidated AGR bundle
  • segmented constructions in form of:
    - in-liners for existing disposal canisters for the large SNF: complete fuel elements from PWR/BWR or single rods after dismantling
    - overpack for the steel canisters with vitrified waste