The proposed approach is based on the following assumptions:

  • There is no ideal host rock!
    Additionally, most countries will have difficulties to find even near-ideal site conditions on their territory.
  • One retention barrier at minimum must keep the long-term integrity!
  • Minimize the amount of metals in the repository!

For said reasons, the authors propose the use of pressure less sintered silicon carbide (SSiC) as a supplementary retention barrier.

The ultimate goal is a zero source term.

Our approach includes the following considerations:

  • Select the appropriate type of silicon carbide
  • Use a sufficient thickness of the SSiC wall
  • Find the proper position for the SSiC wall in the multilayer system
  • Provide an additional protection layer on the inner surface of SSiC wall.