Performance assessment modeling for Savannah River glass HLW disposal in a potential repository at Yucca Mountain

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Description

Performance assessment (PA) simulates the long-term performance of a conceptual geological repository for nuclear waste or the performance of a subsystem such as the engineered barrier system (drifts, waste packages, and any components placed in the drift for structural or chemical purposes). The analysis must accommodate many hypothetical future scenarios and a range on input parameter values. Hence the PA models must abstract the major process features, to span the range of evaluations with computational efficiency and to allow for sensitivity evaluations of the total system. This abstraction is guided by experiments and detailed calculational evaluations for specific situations. The ... continued below

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13 p.

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O`Connell, W.J.; Bourcier, W.L.; Gansemer, J. & Ueng, T.S. August 1, 1997.

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Description

Performance assessment (PA) simulates the long-term performance of a conceptual geological repository for nuclear waste or the performance of a subsystem such as the engineered barrier system (drifts, waste packages, and any components placed in the drift for structural or chemical purposes). The analysis must accommodate many hypothetical future scenarios and a range on input parameter values. Hence the PA models must abstract the major process features, to span the range of evaluations with computational efficiency and to allow for sensitivity evaluations of the total system. This abstraction is guided by experiments and detailed calculational evaluations for specific situations. The present paper shows the setting of a glass-waste chemical alteration model within the larger-scope PA model, a typical abstraction for a glass aqueous model, and thus the types of topics we need to cover as exemplified by the model. The abstraction includes the most important constituents of the water contacting the waste, and an effect on the rate from the increasing silica going into solution, the interface to other processes at the boundary of this process domain identify some important issues. The present example focuses on SRL-202 glass, but other glass types could be handles by a similar experiment review and model abstraction process, in some cases resulting in a similar model with different parameters.

Physical Description

13 p.

Notes

OSTI as DE98053187

Other: FDE: PDF; PL:

Source

  • National meeting/symposium on science and technology for disposal of radioactive tank wastes, Las Vegas, NV (United States), 8-11 Sep 1997

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  • Other: DE98053187
  • Report No.: UCRL-JC--127352
  • Report No.: CONF-9709282--
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 652971
  • Archival Resource Key: ark:/67531/metadc712063

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • August 1, 1997

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 10, 2017, 1:29 p.m.

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O`Connell, W.J.; Bourcier, W.L.; Gansemer, J. & Ueng, T.S. Performance assessment modeling for Savannah River glass HLW disposal in a potential repository at Yucca Mountain, article, August 1, 1997; California. (digital.library.unt.edu/ark:/67531/metadc712063/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.