Nine members of the Wren Group attended the Waste Management Conference in Phoenix, Arizona, 3-8 March, 2019. Clara, Thao and Ryan gave oral presentations, and other members of the group presented posters. We exchanged a lot of useful information with researchers working on similar projects, which has stimulated us to think about new directions and technical approaches for our research in this area.
Youn-Gyeong (Jennifer) Shin has been selected as a recipient of a 2019 Roy. G. Post Foundation Scholarship. This scholarship was established to help students develop careers in the safe management of nuclear materials. It is an international scholarship and she will receive a cash award of $ 5,000 USD and a paid trip to the 2019 Waste Management Conference in Phoenix in March.
Dan Guo has successfully defended his work and become Dr. Guo. Congratulations, Dan!
Ontario Power Generation (OPG) is one of our industrial partners and is collaborating with us on two related projects. The first involves using a high-powered laser to clean oxides from metal surfaces, and the second the use of geopolymers to encapsulate ion exchange resins for disposal. Some OPG scientists and engineers visited us here at Western on 1st November, 2018, so that we could update them on our research progress. Since the last update visit, the laser has been set up in a safety enclosure with a dust extraction system and we have carried out some preliminary oxide collection tests. Oxides have been grown on carbon steel under different conditions and we are progressing towards an understanding of how different oxides compositions and thicknesses affect the cleaning efficiency. Ryan has measured the porosity, compressive strength and leaching properties of the geopolymers he has produced, comparing them to cementitious materials with very promising results.
Razieh (Rose) KarimiHaghighi from the Wren group has been awarded a Women in Nuclear Canada Pioneer Scholarship in the graduate student category. The scholarship includes a $3,000, a plaque, and conference and travel expenses to Saskatoon in Sept 26-28. Congratulations, Rose!
Rose's PhD. project involves studying the effect of gamma radiation on the corrosion behaviour of Candu steam generator materials under operating conditions. The project focuses on nickel as it is the main component of the alloy used in the steam generators of nuclear power plants, and understanding its fundamental corrosion behaviour is critical for prediction of alloy longevity.
Wren group PhD candidate Dan Guo gave a presentation at the EMCR conference in Cambridge on the 25th July, 2018. His talk was entitled "A New Approach for Corrosion Current Measurement - Dual Electrochemical Cell for Corrosion in Oxidizing Solutions". More information about the EMCR conference can be found here:
On 11th May, Dr. Joseph gave a presentation on behalf of Dr. Wren at the The University Network of Excellence in Nuclear Engineering (UNENE) Research Advisory Committee Meeting #42, at the University of Guelph. The talk was entitled "Radiolysis-induced Corrosion of Dissimilar Metal Welds".
Dr. Jiju Joseph (far left) presented a talk on behalf of Dr. Wren at the 2018 Information Exchange Meeting on Super-Critical-Water-Cooled Reactors hosted by the Canadian Nuclear Society. The talk was entitled “Effects of Radiolysis on Materials Degradation under Sub‐ and Supercritical Water Conditions: Experimental and Modelling Studies”. The meeting was held in Montreal.
The Nuclear Waste Management Organization (NWMO) is one of our industrial partners and is collaborating with us on several projects involving the corrosion of metals under radiation. On 3rd May, NWMO scientists Dr. Mehran Behazin and Dr. Peter Keech visited us so that we could update them on our research progress and consult on our laboratory protocols. Graduate students Dan Guo, Jennifer Shin, Masoumeh Naghizadeh and Lindsay Grandy gave presentations on the progress of their research projects. Some great insights and suggestions came out of these discussions!
Rose Karimihaghighi, a PhD candidate in the Wren Group, has just been awarded an OGS scholarship. Congratulations, Rose!
Rose's research involves studying the effect of pH, temperature, ionic strength, and γ-radiation on corrosion and oxide formation on pure (> 99.95%) nickel and Alloy 600. These materials are widely used in the nuclear industry due to their tendency to form corrosion-resistant oxide films. They are exposed to gamma-radiation and radiolysis products in the coolant flowing from the reactor core. In order to improve the fundamental understanding of the corrosion of these alloys, the kinetics of metal oxidation and oxide formation are being studied by performing various experiments.