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Bounding Analysis for Solubility

Published online by Cambridge University Press:  03 September 2012

T. Ohi  and
K. Nakajima
T. Ohi
Affiliation:
Power Reactor and Nuclear Fuel Development Corporation, Tokai-mura, Ibaraki-ken, JAPAN 319–11, ooitakao@tokai.pnc.go.jp.
K. Nakajima
Affiliation:
Nuclear Energy System Incorporation, Tokai-mura, Ibaraki-ken, JAPAN 319–11.
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Abstract

In performance assessment of geological disposal systems for High LevelRadioactive Waste (HLW), the change of environment over the long-term mustbe considered. Therefore, it is necessary to consider a wide range ofparameters concerned with radionuclides migration, especially the dependenceof solubility on geochemical environment. In this study, assuming that therelease rate of the nuclides from buffer material is limited by inventoryultimately, the relationship between the initial inventory and thesolubility that produces a solubility-invariant maximum release rate fromthe buffer is examined by using a simple steady-state analytical solutionwithout decay. As the result, the threshold of “effective” solubility in theperformance assessment of the geological disposal systems for HLW isobtained as a function of initial inventory, distribution coefficient (Kd),diffusion coefficient, and thickness, porosity and density of the buffer.Also, the threshold of “effective” steady dissolution rate corresponding tothe threshold of “effective” solubility is obtained.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 465: Symposium II – Scienfific Basis for Nuclear Waste Management XX , 1996 , 1091
Copyright
Copyright © Materials Research Society 1997

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References

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