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Growth of Surface Layer During the Leaching of The Simulated Waste Glass and its Barrier Effects on the Leaching

Published online by Cambridge University Press:  21 February 2011

K. Ishiguro ,
N. Kawanishi ,
N. Sasaki ,
H. Nagaki  and
M. Yamamoto
K. Ishiguro
Affiliation:
Power Reactor and Nuclear Fuel Development Corporation, Tokai-mura, Japan
N. Kawanishi*
Affiliation:
Power Reactor and Nuclear Fuel Development Corporation, Tokai-mura, Japan
N. Sasaki
Affiliation:
Power Reactor and Nuclear Fuel Development Corporation, Tokai-mura, Japan
H. Nagaki
Affiliation:
Power Reactor and Nuclear Fuel Development Corporation, Tokai-mura, Japan
M. Yamamoto
Affiliation:
Power Reactor and Nuclear Fuel Development Corporation, Tokai-mura, Japan
*
* Present address; Toshiba Corporation, Isogo-ku, Yokohama 235; Japan.
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Abstract

The growth of surface layers on simulated waste glass during two different types of leaching has been studied in conjunction with their corrosion kinetics. Static and Soxhlet leach tests were performed in distilled water at a temperature of 100°C. Auger and ESCA analyses of solid samples after leaching showed that the layers consisted of two or three sublayers which were distinguished by their different components. The transition elements Fe and Ni, the rare-earths Nd and La, and Zn were concentrated in the layers, while Si, B and alkali were depleted in most of the layers. Growth kinetics of the layers followed approximately linear relations for the two types of leaching. Growth rates and elemental profiles of the layers depended upon the leaching conditions. Comparison between the leaching rate and the thickness of the layer showed that layers did not work as effective diffusion barriers until a threshold thickness was reached, which depended on the layer structures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 15: Symposium D – Scientific Basis for Nuclear Waste Management VI , 1982 , 135
Copyright
Copyright © Materials Research Society 1983

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References

REFERENCES

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