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Source Trends for Performance Assessment of HLW Glass and Spent Fuel as Waste Forms

Published online by Cambridge University Press:  10 February 2011

B. Grambow*
Affiliation:
Forschungszentrum Karlsruhe, INE, Postfach 3640, D-76021 Karlsmhe, Germany, [email protected]
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Abstract

with respect to the state of validation for source term development. Consequences of the various mechanism on mass half lives of the waste forms are calculated with analytical equations. For glass the largest uncertainty stems from the yet unclear dissolution mechanism under silica saturated conditions. Source terms based on silica solubility coupled to Si-mass transfer are probably neither conservative nor realistic. For spent fuel the largest uncertainty is in the extrapolation of radiolytic fuel oxidation for long periods of time. Considering the uncertainties involved, reaction rates cannot yet be extrapolated reliably to values much lower than the lowest reliable experimental measurements.

Type
Research Article
Copyright
Copyright © Materials Research Society 1998

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References

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