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Peter G. Keech
Nuclear Waste Management Organization
60Publications
16H-index
629Citations
Publications 60
Newest
#1Allan K. Järvine (UW: University of Waterloo)
#2Alan G. Murchison (Nuclear Waste Management Organization)
Last.Mahesh D. Pandey (UW: University of Waterloo)H-Index: 27
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Abstract Placement of encapsulated used nuclear fuel in a deep geological repository is recognised internationally as the leading option to achieve containment and isolation from the environment and the public. In Canada, containment and isolation are proposed through an engineered barrier system, which comprises a copper-coated, welded carbon-steel container to encapsulate used fuel, highly compacted bentonite clay buffer, and the geosphere. Critical to regulatory approval and public confidence...
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#1Sophia Necib (ANDRA: Australian National Drag Racing Association)H-Index: 5
#2Michel L. Schlegel (Université Paris-Saclay)H-Index: 3
Last.Didier Crusset (ANDRA: Australian National Drag Racing Association)H-Index: 9
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ABSTRACTCarbon steel (C-steel; E24 and S235 grades) and stainless steel (316L) electrodes were corroded in situ in Opalinus clay under anoxic conditions in a vertical descending borehole. The elect...
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#1Dominique Poirier (National Research Council)H-Index: 6
#2Jean-Gabriel Legoux (National Research Council)H-Index: 23
Last.Peter G. Keech (Nuclear Waste Management Organization)H-Index: 16
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This paper presents the development work undertaken to tailor Cu powder size specifications to produce dense cold spray Cu coatings featuring strong adherence on steel substrates. Through review of historical data generated in the course of the development of Cu coatings for corrosion protection of Used (Nuclear) Fuel Containers, it was found that particle size distribution was particularly critical to meet application adhesion requirements of 60 MPa and prevent nozzle clogging during applicatio...
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1 CitationsSource
#1Thalia E. StandishH-Index: 2
#2Dmitrij ZagidulinH-Index: 7
Last.James J. NoëlH-Index: 23
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Within the multi-barrier system proposed for the permanent disposal of used nuclear fuel, the primary engineered barrier is the sealed metallic container. The present Canadian container design utilizes a carbon steel vessel coated with Cu for corrosion protection. In the event of a defect in the Cu coating that exposes the steel substrate, galvanically accelerated corrosion of steel is, in principle, possible. In this work, the progression of corrosion at a simulated through-coating defect in 3....
1 CitationsSource
#1David S. Hall (Dal: Dalhousie University)H-Index: 14
#2Thalia E. Standish (UWO: University of Western Ontario)H-Index: 2
Last.Peter G. Keech (Nuclear Waste Management Organization)H-Index: 16
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ABSTRACTThe Nuclear Waste Management Organization is evaluating the safety and feasibility of the permanent disposal of used nuclear fuel in a deep geological repository. Their current design concept utilises copper-coated steel used fuel containers to isolate the waste from the environment. Immediately following repository closure, a finite quantity of O2 will be trapped inside the repository and could cause some amount of oxic corrosion to the outer copper layer of the containers. On a per con...
2 CitationsSource
#1B.P. Payne (CRL: Chalk River Laboratories)H-Index: 6
#2Peter G. Keech (Nuclear Waste Management Organization)H-Index: 16
Last.N. S. McIntyre (UWO: University of Western Ontario)H-Index: 38
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The oxide chemical composition on metallic Ni and NiCr alloy electrodes has been studied for changes in simulated reactor coolant solution chemistry, through a range of oxidizing potentials and pH settings at 25 °C and 150 °C. Even under strongly reducing conditions, the Ni surface has a 2-nm layer of oxide and hydroxide from which further oxides form, depending on the subsequent oxidative step. For basic (normal operating) pH conditions and under oxidation potentials near 0 volts (vs. SCE), a p...
1 CitationsSource
#1Thalia E. Standish (UWO: University of Western Ontario)H-Index: 2
#2Dmitrij Zagidulin (UWO: University of Western Ontario)H-Index: 7
Last.David W. Shoesmith (UWO: University of Western Ontario)H-Index: 20
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ABSTRACTCanada is currently considering Cu-coated carbon steel containers for the long-term storage of used nuclear fuel in a deep geological repository. The Cu coating provides a corrosion-resistant barrier, protecting the underlying steel from coming into contact with groundwater. However, galvanically accelerated corrosion of steel is possible if there is a defect through the Cu coating. To investigate this scenario, the progression of steel corrosion at the base of a simulated though-coating...
7 CitationsSource
#1Fraser KingH-Index: 1
#2David S. Hall (Nuclear Waste Management Organization)H-Index: 14
Last.Peter G. Keech (Nuclear Waste Management Organization)H-Index: 16
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ABSTRACTThe corrosion behaviour of nuclear fuel waste containers depends on the near-field environmental conditions, which may differ significantly from those in the host rock, especially during the early thermal-saturation transient phase. Although it is widely accepted that, in broad terms, the repository evolves from initially warm and oxidising to cool and anoxic in the long term, it is important to understand the detailed nature of the near-field environment in order to predict the corrosio...
7 CitationsSource
#1Scott Briggs (York University)H-Index: 3
#2Jennifer McKelvieH-Index: 2
Last.Magdalena M. Krol (York University)H-Index: 7
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ABSTRACTThe Canadian Nuclear Waste Management Organization (NWMO) has chosen a used fuel container (UFC) design that consists of an inner steel core and outer copper coating that resists corrosion in the anaerobic underground. However, in these anaerobic conditions, microbiologically influenced corrosion (MIC) can contribute to UFC corrosion if sulphides are present in the repository. Therefore, an engineered barrier system (EBS) consisting of bentonite blocks and pellets has been designed to in...
2 CitationsSource
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