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Transfer characteristics of a lithium chloride – potassium chloride molten salt
Eve Mullen,Ross Harris,Dave Graham,Chris Rhodes,Zara Hodgson 한국원자력학회 2017 Nuclear Engineering and Technology Vol.49 No.8
Pyroprocessing is an alternative method of reprocessing spent fuel, usually involving the dissolving spent fuel in a molten salt media. The National Nuclear Laboratory designed, built, and commissioned a molten salt dynamics rig to investigate the transfer characteristics of molten lithium chlorideepotassium chloride eutectic salt. The efficacy and flow characteristics of a high-temperature centrifugal pump and argon gas lift were obtained for pumping the molten salt at temperatures up to 500℃. The rig design proved suitable on an industrial scale and transfer methods appropriate for use in future molten salt systems. Corrosion within the rig was managed, and melting techniques were optimized to reduce stresses on the rig. The results obtained improve the understanding of molten salt transport dynamics, materials, and engineering design issues and support the industrialization of molten salts pyroprocessing.
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Applications of New Remote Sensing Technology to Natural Rock Slope Stability Analysis
( D Jean Hutchinson ),( David Bonneau ),( Dave Gauthier ),( Ioannis Farmakis ),( Kurri Reich ),( Paul-mark Difrancesco ),( Alex Graham ),( Melanie Coombs ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
Assessment of stability of natural rock slopes located above infrastructure corridors, such as railways, and highways is required in order to evaluate potential for failure, loss of infrastructure capacity, and threats to public safety. As these slopes are not engineered, natural failure processes dominate. These are difficult to assess as direct physical access is generally not possible, and monitoring data is rarely available. A variety of remote sensing techniques from several vantage points and platforms have been deployed to evaluate rock slope stability, including LiDAR, photogrammetry, and Gigapan photography, from terrestrial and a variety of airborne platforms. Techniques have been developed to utilize both single data acquisitions as well as time sequential data sets. Analysis of data sets from different sources has proven to be useful in order to reduce loss of data due to occlusion and to provide different data types which are useful for different applications. A number of case histories of large rock slopes in the mountainous areas of western Canada will be used to demonstrate the integration of engineering geology into the remote sensing analysis of the rock slopes. Research products include assessment of the rockmass characteristics, an assessment of block volume, analysis of slope deformation and failures leading to forecasting of potential future events, dependent on the failure mechanism. As the database of rock slope case histories continues to build, we are moving ever closer to a more detailed understanding of rock slope failure modes, precursor events, deformation thresholds and the effect of triggering events.
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