Performance Assessment Modeling for Savannah River Glass HLW Disposal in a Potential Repository at Yucca Mountain

  • W. J. O’Connell
  • W. L. Bourcier
  • J. Gansemer
  • T.-S. Ueng

Abstract

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 of 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 alteration 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 interfaces to other processes at the boundary of this process domain identify some important issues.

Keywords

Hydration Radionuclide Cristobalite 

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References

  1. 1.
    W.L. Bourcier, “Critical Review of Glass Performance Modeling,” ANL-94/17, Argonne National Laboratory, Argonne, IL (1994).CrossRefGoogle Scholar
  2. 2.
    U.S. Department of Energy, “High-Level Waste Borosilicate Glass, A Compendium of Corrosion Characteristics,” DOE-EM-0177, USDOE Office of Waste Management (March 1994).Google Scholar
  3. 3.
    K.G. Knauss, et al., “Dissolution kinetics of a simple analogue nuclear waste glass as a function of pH, time and temperature,” Material Research Society Symposium Proceedings 176:371 (1990).Google Scholar
  4. 4.
    D.G. Wilder, “Near-field environment report volume I: Technical basis for EBS Design,” UCRL-LR-107476, Lawrence Livermore National Laboratory, Livermore, CA (1992).Google Scholar
  5. 5.
    J.W. Johnson, E.H. Oelkers, and H.C. Helgeson, “SUPCRT92: A software package for calculating the standard molal thermodynamic properties of minerals, gases, aqueous species, and reactions from 1 to 5000 bar and 0 to 1000°C,” Computers and Geosciences 18:899 (1992).CrossRefGoogle Scholar
  6. 6.
    R.G. Baxter, “Description of Defense Waste Processing Facility Reference Waste Form and Canister,” Report DP-1606, Savannah River Plant (1983).Google Scholar
  7. 7.
    R.B. Stout et al., “Waste Forms Characteristics Report,” Lawrence Livermore National Laboratory, Livermore, CA(1996).Google Scholar
  8. 8.
    K.G. Knauss, W.J. Beiriger, and D.W. Peifer, “Hydrothermal interaction of solid wafers of Topopah Spring Tuff with J-13 water at 90 and 150 C using Dickson-type, gold-bag rocking autoclaves: Long-term experiments,” UCRL-53722, Lawrence Livermore National Laboratory, Livermore, CA (1987).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • W. J. O’Connell
    • 2
  • W. L. Bourcier
    • 2
  • J. Gansemer
    • 2
  • T.-S. Ueng
    • 1
  1. 1.Civil Engineering DeptNational Taiwan UniversityTaipeiTaiwan
  2. 2.Lawrence Livermore National LaboratoryLivermoreUSA

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