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Real-Time Nanogravimetric Monitoring of Corrosion in Radioactive Decontamination Systems

Published online by Cambridge University Press:  23 December 2016

Ioannis Tzagkaroulakis ,
Colin Boxall  and
Divyesh Trivedi
Ioannis Tzagkaroulakis
Affiliation:
Lancaster University, Engineering Department, Lancaster, LA1 4YW, United Kingdom.
Colin Boxall*
Affiliation:
Lancaster University, Engineering Department, Lancaster, LA1 4YW, United Kingdom.
Divyesh Trivedi
Affiliation:
National Nuclear Laboratory, Warrington, WA3 6AE, United Kingdom.
*
*(Email: [email protected])
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Abstract

Monitoring and understanding of corrosion on nuclear sites is key to safe asset management (predicting plant life, assessing efficacy of corrosion inhibitors for plant lifetime extension) and supporting informed choice of decontamination methods for steels due for decommissioning. Recent advances in Quartz Crystal Nanobalance (QCN) technology offer a means to monitor corrosion in-situ in radiologically harsh environments, in real time and with high sensitivity.

Oxalic acid has been widely used in nuclear facilities as a corrosion inhibitor for carbon steels and as a decontamination cleaning agent due to its ability to remove rust from the surface of ferritic metals and alloys. As an exemplar system for decontamination, the corrosion behavior of pure iron samples in 1 wt% oxalic acid solution has, for the first time, been measured in simulated radioactive environments in real time, in situ using the QCN. Results show that the QCN is a promising tool for studying the efficacy of oxalic acid decontamination agent formulations with the sensor providing useful mechanistic information regarding decontaminating agent mode-of-action derived from the mass change (gain or loss) in real time when a quartz crystal is immersed in oxalic acid solution in simulated and non–simulated radioactive environments.

Keywords

corrosionwaste managementnuclear materials
Type
Articles
Information
MRS Advances , Volume 2 , Issue 10: Scientific Basis for Nuclear Waste Management XL , 2017 , pp. 577 - 582
Copyright
Copyright © Materials Research Society 2016 

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