Reactive chemical transport simulations of glass corrosion and radionuclide transport from a low-activity waste disposal system were conducted out to times in excess of 20,000 y with the Subsurface Transport Over Reactive Multiphases (STORM) code. Time and spatial dependence of glass corrosion rate, secondary phase formation, pH, and radionuclide concentration were evaluated. The results show low release rates overall for the low-activity waste glasses such that performance objectives for the site will be met by a factor of 20 or more. Parameterization of the computer model was accomplished by combining direct laboratory measurements, literature data (principally thermodynamic data), and parameter estimation methods.
Revised: January 12, 2012 |
Published: September 1, 2001
Citation
McGrail B.P., D.H. Bacon, J.P. Icenhower, F.M. Mann, R.J. Puigh, H.T. Schaef, and S.V. Mattigod. 2001.Near-Field Performance Assessment for a Low-Activity Waste Glass Disposal System: Laboratory Testing to Modeling Results.Journal of Nuclear Materials 298, no. 1-2:95-111.PNNL-SA-35379.