Imperial College London

Professor WE (Bill) Lee FREng

Faculty of EngineeringInstitute for Security Science & Technology

Co-Director of Institute for Security Science and Technology
 
 
 
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Contact

 

+44 (0)20 7594 6733w.e.lee Website

 
 
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Assistant

 

Ms Denise McGurk +44 (0)20 7594 8864

 
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Location

 

Central LibrarySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Chinnam:10.1016/j.jnucmat.2018.02.040,
author = {Chinnam, RK and Fossati, PCM and Lee, WE},
doi = {10.1016/j.jnucmat.2018.02.040},
journal = {Journal of Nuclear Materials},
pages = {56--65},
title = {Degradation of partially immersed glass: A new perspective},
url = {http://dx.doi.org/10.1016/j.jnucmat.2018.02.040},
volume = {503},
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - The International Simple Glass (ISG) is a six-component borosilicate glass which was developed as a reference for international collaborative studies on high level nuclear waste encapsulation. Its corrosion behaviour is typically examined when it is immersed in a leaching solution, or when it is exposed to water vapour. In this study, an alternative situation is considered in which the glass is only partially immersed for 7 weeks at a temperature of 90ºC. In this case, half of the glass sample is directly in the solution itself, and the other half is in contact with a water film formed by condensation of water vapour that evaporated from the solution. This results in a different degradation behaviour compared to standard tests in which the material is fully immersed. In particular, whilst in standard tests the system reaches a steady state with a very low alteration rate thanks to the formation of a protective gel layer, in partially-immersed tests this steady state could not be reached because of the continuous alteration from the condensate water film. The constant input of ions from the emerged part of the sample caused a supersaturation of the solution, which resulted in early precipitation of secondary crystalline phases.This setup mimics storage conditions once small amounts of water have entered a glass waste form containing canister. It offers a more realistic outlook of corrosion mechanisms happening in such situations than standard fully-immersed corrosion tests.
AU - Chinnam,RK
AU - Fossati,PCM
AU - Lee,WE
DO - 10.1016/j.jnucmat.2018.02.040
EP - 65
SN - 0022-3115
SP - 56
TI - Degradation of partially immersed glass: A new perspective
T2 - Journal of Nuclear Materials
UR - http://dx.doi.org/10.1016/j.jnucmat.2018.02.040
UR - http://hdl.handle.net/10044/1/57539
VL - 503
ER -