Analysis on the use of engineered barriers for geologic isolation of spent fuel in a reference salt site repository

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A perspective on the potential durability and effectiveness requirements for the waste form, container and other engineered barriers for geologic disposal of spent nuclear fuel has been developed. This perspective is based on calculated potential doses to individuals who may be exposed to radioactivity released from a repository via a groundwater transport pathway. These potential dose commitments were calculated with an integrated geosphere transport and bioshpere transport model. A sensitivity analysis was accomplished by varying four important system parameters, namely the waste radionuclide release rate from the repository, the delay prior to groundwater contact with the waste (leach initiation), aquifer ... continued below

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Cloninger, M.O.; Cole, C.R. & Washburn, J.F. December 1, 1980.

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Description

A perspective on the potential durability and effectiveness requirements for the waste form, container and other engineered barriers for geologic disposal of spent nuclear fuel has been developed. This perspective is based on calculated potential doses to individuals who may be exposed to radioactivity released from a repository via a groundwater transport pathway. These potential dose commitments were calculated with an integrated geosphere transport and bioshpere transport model. A sensitivity analysis was accomplished by varying four important system parameters, namely the waste radionuclide release rate from the repository, the delay prior to groundwater contact with the waste (leach initiation), aquifer flow velocity and flow path length. The nuclide retarding capacity of the geologic media, a major determinant of the isolation effectiveness, was not varied as a parameter but was held constant for a particular reference site. This analysis is limited to looking only at engineered barriers whose net effect is either to delay groundwater contact with the waste form or to limit the rate of release of radionuclides into the groundwater once contact has occurred. The analysis considers only leach incident scenarios, including a water well intrusion into the groundwater near a repository, but does not consider other human intrusion events or catastrophic events. The analysis has so far been applied to a reference salt site repository system and conclusions are presented.Basically, in nearly all cases, the regional geology is the most effective barrier to release of radionuclides to the biosphere; however, for long-lived isotopes of carbon, technetium and iodine, which were poorly sorbed on the geologic media, the geology is not very effective once a leach incident is initiated.

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NTIS, PC A12/MF A01.

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  • Other: DE81027620
  • Report No.: PNL-3356
  • Grant Number: AC06-76RL01830
  • DOI: 10.2172/6410861 | External Link
  • Office of Scientific & Technical Information Report Number: 6410861
  • Archival Resource Key: ark:/67531/metadc1204707

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 1, 1980

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

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  • Sept. 4, 2018, 6:46 p.m.

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Cloninger, M.O.; Cole, C.R. & Washburn, J.F. Analysis on the use of engineered barriers for geologic isolation of spent fuel in a reference salt site repository, report, December 1, 1980; United States. (digital.library.unt.edu/ark:/67531/metadc1204707/: accessed January 22, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.