25 August 2015

Surface Analysis of Electrochemically Oxidized Uranium Dioxide

The safety assessment of the Canadian nuclear waste disposal program requires a fundamental understanding of the processes controlling fuel corrosion which could lead to the release of radionuclides to the geosphere from a failed container. The redox conditions controlling fuel (UO2) corrosion inside a failed container will be dictated by the alpha radiation fields within...
29 July 2015

New Hitachi SU3500 Variable Pressure Scanning Electron Microscope combined with an Oxford AZtec X-Max50 SDD Energy Dispersive Detector Installed at SSW

On June 15, 2015, we took delivery of our new Hitachi SU3500 Variable Pressure Scanning Electron Microscope combined with an Oxford AZtec X-Max50 SDD energy dispersive detector. The SEM can be run in standard high vacuum mode and provides standard high resolution images and EDS micro analysis. The SU3500 can also operate at low pressures...
25 June 2015

Dr. N. Stewart McIntyre Award 2015 Winner – Thalia Standish

Congratulations to Ms. Thalia Standish, PhD candidate from the Department of Chemistry at Western University, winner of the 2015 Dr. N. Stewart McIntyre Award in Surface Science. Thalia’s research abstract was entitled “Galvanic Corrosion between Copper and Carbon Steel: An Investigation for Nuclear Waste Disposal Containers”. Thalia has used a variety of surface analysis techniques...
12 June 2015

SSW Director David Shoesmith wins H.H. Uhlig Award

Prof. David Shoesmith, Department of Chemistry and Surface Science Western Director is the winner of this year’s H.H. Uhlig Award of the Corrosion Division of the Electrochemical Society. Dave will receive the award, and a reception in his honour will be held, at the Electrochemical Society fall meeting in Phoenix Arizona in October. This is...
14 April 2015

Assessment of the Role of Alloying Elements on the Corrosion Behaviour of Ni-Cr-Mo Alloys

The primary goal of this research was to elucidate the key influences of the alloying elements in Ni-Cr-Mo alloys on their electrochemical behaviour. Two alloys, varying in Cr and Mo content, were studied in deaerated 5 M NaCl solutions. As indicated in Figure 1, potentiostatic polarization followed by electrochemical impedance spectroscopy (EIS) (to measure the...
25 March 2015

Research Highlight – Crevice Corrosion of Grade-2 Titanium

Titanium alloys are highly corrosion resistant under oxidizing conditions, but can suffer crevice corrosion at elevated temperatures (>70°C) if the surface is occluded by another material, such as a deposit, a poor weld or a crack. The conditions which develop within a crevice are such that, in the event of the breakdown of the protective...
25 February 2015

Electrochemical Study of Doped Uranium Oxide (UO2) in Slightly Alkaline Sodium Carbonate/Bicarbonate Solutions

This recent research project was designed to investigate the influence of carbonate/bicarbonate, the key groundwater constituents likely to influence fuel dissolution inside a failed nuclear waste disposal container, on the reactivity of different uranium oxide (UO2) specimens. A cyclic voltammetric (CV) study of doped UO2 (Dy-UO2, Gd-UO2, 1.5 at% SIMFUEL and UO2.002) in 0.1 M...
05 February 2015

Electrochemical and Surface Analytical Measurements on Cu-Coated Steel Specimens

The proposed Canadian container for the disposal of spent nuclear fuel consists of a dual wall comprised of an outer shell of copper over an inner low alloy steel vessel. Because of manufacturing and fabrication challenges for thick-walled containers, a thin-walled alternative design is being developed. Their fabrication involves coating copper directly on the surface...