caa a22 4500 465729207 CHVBK 20180323111736.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF02039471 doi (NATIONALLICENCE)springer-10.1007/BF02039471 Apted M. Pacific Northwest Laboratory, 99352, Richland, WA, (USA) aut Radionuclide release from high-level nuclear-waste packages [Elektronische Daten] [M. Apted] The engineered barrier subsystem (EBS) in an important component in limiting the release of radionuclides from a geologic repository for disposal of high-level nuclear waste. The purpose of this paper is to identify and discuss the key processes that affect the release of radionuclides from nuclear waste forms and migration of these radionuclides through the nuclear-waste packages of the EBS to the geologic setting (i.e., far-field). Previous studies of release have focused on laboratory testing and modelling of the waste-form dissolution ("leaching”). Mass-transfer analyses, using realistic chemical-reaction-rate boundary conditions, confirm that radionuclide release from the EBS will be controlled by solubilitylimited, mass transport, rather than by waste-form "leaching”. Based on these well-established and laboratory-validated models, key data necessary for reliable predictions of the long-term performance of an EBS are identified. These data include the local chemistry at the wasteform surface, radionuclide solubilities and sorption behavior in contact with engineered materials, and characteristics of radionuclide-bearing colloids. Akadémiai Kiadó, 1990 Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 142/1(1990-09-01), 321-330 0236-5731 142:1<321 1990 142 10967 https://doi.org/10.1007/BF02039471 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02039471 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Apted M. Pacific Northwest Laboratory, 99352, Richland, WA, (USA) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 142/1(1990-09-01), 321-330 0236-5731 142:1<321 1990 142 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer