Chemical Reactions in the Bedrock-Groundwater System of Importance for the Sorption of Actinides
Most suggested alternatives for deep underground disposal of high level radioactive wastes rely upon several independent barriers like resistant canister materials, waste forms of low solubility in groundwaters and the use of back-fill material of low permeability and with nuclide retaining capacity. These barriers would retard the eventual release of radionuclides from the repository into the groundwater/bedrock system. The final and the only non-engineered barrier would be the host rock itself. It would be desirable if the rock alone would be able to retain the long-lived radionuclides coming from the waste for long enough times to allow decay to harmless activity levels before they might reach the biosphere.
KeywordsDistribution Coefficient Igneous Rock High Level Radioactive Waste Sorption Reaction Complex Formation Reaction
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