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    have a long period of monitored controls and enhanced retrievability before being converted into their final closed state.
  • Adequately safe geological repositories can be implemented with various combinations of carefully selected host rocks, sites, and engineered barriers as long as decisions are taken commensurate with understanding. It will never be possible to demonstrate that any one site is the “safest” choice. Factors other than long-term safety will also determine or even dominate siting choices.



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