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6. Corrosion of steel drums containing cemented ion exchange-resins

Title: 6. Corrosion of steel drums containing cemented ion exchange-resins
Author(s): S.B. Farina, F.M. Schulz, G.S. Duffo
Paper category : conference
Book title: NUCPERF 2009 - Long Term Performance of Cementitious Barriers and Reinforced Concrete in Nuclear Power Plants and Waste Management
Editor(s): V. L'Hostis, R. Gens, C. Gallé
Print-ISBN: 978-2-35158-072-1
e-ISBN: 978-2-35158-087-5
Publisher: RILEM Publications SARL
Publication year: 2009
Pages: 53 - 60
Total Pages: 8
Nb references: 14
Language: English

Abstract: Ion exchange resins are granular substances commonly used for purification of radioactive liquid waste from nuclear reactors. After exhaustion, resins are replaced by new ones and the spent resins become low level or intermediate level radioactive waste to be managed. They have to be immobilized before being stored to improve the leach resistance of the waste matrix and to maintain mechanical stability for safety requirements.

Generally, cementation processes have been used as immobilization techniques for economical reasons and for being a simple operation. The immobilized resins are thus contained in steel drums that can undergo corrosion depending on the presence of certain contaminants.

This work is part of a systematic study of the corrosion susceptibility of steel drums in contact with cemented exchange-resins with different types and contents of aggressive species (chloride and sulphate ions). A special type of specimen was designed to simulate the cemented resins in the drum. The evolution of the corrosion potential and the corrosion current density of the steel, as well as the electrical resistivity of the matrix are being monitored. Preliminary results show the effect of chloride on the corrosion susceptibility of the steel. Monitoring will continue for several years.

Online publication: 2009-11-16
Publication type : full_text
Public price (Euros): 0.00

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