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.
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 so that we could update them on our research progress. In the above images, graduate students Thao Do and Ryan Morco give presentations on their research progress and show the laser set-up and some geopolymers that have been produced. A technician from Laserax, a company in Quebec that manufactures the laser we are using, also came to help demonstrate the laser.
The Wren Group visited the Nuclear Waste Management Organization's Proof Test Facility in February, 2018. This was a fantastic opportunity for information exchange between NWMO and its academic research partners from several universities. We got to see the used fuel container, bentonite clay box production, and fabrication and transportation technologies. Dr. Joseph gave a presentation about our group's collaborative research with NWMO. Our students gave poster presentations on their research projects and had many fruitful discussions. Thanks, NWMO, for hosting such a useful and well-organized event!
In November, Dr. Wren attended the Corrosion Prediction and Mitigation for Key Components of Fukushima Daiichi NPS conference in Japan as an invited keynote speaker. Her lecture was entitled "Effects of Chemical and Physical Properties of Solution on Radiolysis Induced Corrosion of Carbon Steel". This is Dr. Wren's second invited visit to Fukushima to provide expertise on radiation-influenced corrosion to assist with the the decontamination and decommissioning process.