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A Modelling and Experimental Study for Long-Term Prediction of Localised Corrosion in Carbon Steel Overpacks for High-Level Radioactive Waste.

Published online by Cambridge University Press:  15 February 2011

A. Hoch ,
A. Honda ,
H. Ishikawa ,
F. Porter ,
S. Sharland  and
N. Taniguchi
A. Hoch
Affiliation:
AEA Technology, Harwell, Oxfordshire, United Kingdom
A. Honda
Affiliation:
Power Reactor & Nuclear Fuel Development Corporation, Tokai Works, Ibaraki-ken, JAPAN
H. Ishikawa
Affiliation:
Power Reactor & Nuclear Fuel Development Corporation, Tokai Works, Ibaraki-ken, JAPAN
F. Porter
Affiliation:
AEA Technology, Harwell, Oxfordshire, United Kingdom
S. Sharland
Affiliation:
AEA Technology, Harwell, Oxfordshire, United Kingdom
N. Taniguchi
Affiliation:
Power Reactor & Nuclear Fuel Development Corporation, Tokai Works, Ibaraki-ken, JAPAN
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Abstract

This paper describes a joint modelling and experimental study for investigation of pit growth in carbon steel High-Level Radioactive Waste overpacks under consideration in Japan. A mathematical model of the growth of corrosion pits in metals has been developed. This model is implemented in the computer program CAMLE, and includes representation of the chemical, electrochemical and migration processes that control pit-growth rates. Experiments to provide key input data for the model are described, in addition to experiments to measure ‘short-term’ pit growth. Predictions from the model are compared with these data. Overall, the comparisons are encouraging and the model shows good potential as a tool for assessment of the long-term corrosion behaviour of overpacks under repository conditions. Future developments of the model to improve agreement are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 353: Symposium – Scientific Basis for Nuclear Waste Management XVIII , 1994 , 703
Copyright
Copyright © Materials Research Society 1995

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References

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