Geochemistry.

CFR · 2024-01-01 · US · Title 10

(a) (b) (2) Geochemical conditions that promote the precipitation, diffusion into the rock matrix, or sorption of radionuclides; inhibit the formation of particulates, colloids, inorganic complexes, or organic complexes that increase the mobility of radionuclides; or inhibit the transport of radionuclides by particulates, colloids, or complexes. (3) Mineral assemblages that, when subjected to expected repository conditions, would remain unaltered or would alter to mineral assemblages with equal or increased capability to retard radionuclide transport. (4) A combination of expected geochemical conditions and a volumetric flow rate of water in the host rock that would allow less than 0.001 percent per year of the total radionuclide inventory in the repository at 1,000 years to be dissolved. (5) Any combination of geochemical and physical retardation processes that would decrease the predicted peak cumulative releases of radionuclides to the accessible environment by a factor of 10 as compared to those predicted on the basis of ground-water travel time without such retardation. (c) (2) Geochemical processes or conditions that could reduce the sorption of radionuclides or degrade the rock strength. (3) Pre-waste-emplacement ground-water conditions in the host rock that are chemically oxidizing.

official document · source cfr-2024 · id 10:§ 960.4-2-2