Nuclear waste repository basalt

Geochemical Controls on Radionuclide Releases from a Nuclear Waste Repository in Basalt Estimated Solubilities for Selected Elements... 

Jacobs, G. K. Apted, M. J. "Eh-pH Conditions for Groundwater at the Hanford Site, Washington Implications for Radionuclide Solubility in a Nuclear Waste Repository Located in Basalt, Trans. Am. Geophys. Un.1981,62,1065. 

Preliminary Assessment of Oxygen Consumption and Redox Conditions in a Nuclear Waste Repository in Basalt... 

Waste Package Concepts for Use in the Conceptual Design of the Nuclear Waste Repository in Basalt, AESD-TME-3142, Westinghouse Electric Co., Pittsburgh, Pennsylvania, for Battelle Project Management Division, Office of Nuclear Waste Isolation, Sept., 1982. 

In a nuclear waste repository located in basalt, solution pH is controlled by interactions between groundwater and the reactive glassy portion of the Grande Ronde basalt (10). In situ measurements and experimental data for this system indicate that equilibrium or steady-state solutions are saturated with respect to silica at ambient temperatures and above. Silica saturation and the low, total-dissolved carbonate concentration indicate the pH may be controlled by the dissolution of the basalt glass (silica-rich) with subsequent buffering by the silicic acid buffer. At higher temperatures, carbonate, sulfate, and water dissociation reactions may contribute to control the final pH values. 

Early, T. O. Jacobs, G. K. Drewes, D. R. "Geochemical Controls on Radionuclide Releases from a Nuclear Waste Repository in Basalt Estimated Solubilities for Selected Elements RHO-BW-ST-39, Rockwell Hanford Operations, Richland, Washington, 1982. 

This paper is a progress report of an experimental study underway at ANL on the interaction of flowing simulated ground-water and the components that may be used in a nuclear waste repository constructed in basalt The components are placed in the water stream analogously to the configuration that could occur from a breach of the repository hence, the experiments... 

It has been the underlying theme of this paper that the theoretical approach to solubility and speciation of key radionuclides adopted here can be helpful in identifying the general types of species likely to be dominant in aqueous solutions. At present, these estimates are useful in identifying those radionuclides that require special attention in repository performance assessment studies. However, sophisticated experimental studies are necessary to provide important confirmatory data for nuclides of critical importance to the safe isolation of nuclear waste in a repository in basalt. 

Apps, j. a. 1983. Hydrothermal evolution of repository groundwaters in basalt. In NRC nuclear waste geochemistry 83, ed D. H. Alexander and G. F. Berchard. Report NUREG/CP-0052, pp. 14-51. U.S. Nuclear Regulatory Commission. 

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