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POTENTIAL APPLICATIONS FOR NUCLEAR ENERGY BESIDES ELECTRICITY GENERATION: A GLOBAL PERSPECTIVE
Gauthier, Jean-Claude,Ballot, Bernard,Lebrun, Jean-Philippe,Lecomte, Michel,Hittner, Dominique,Carre, Frank Korean Nuclear Society 2007 Nuclear Engineering and Technology Vol.39 No.1
Energy supply is increasingly showing up as a major issue for electricity supply, transportation, settlement, and process heat industrial supply including hydrogen production. Nuclear power is part of the solution. For electricity supply, as exemplified in Finland and France, the EPR brings an immediate answer; HTR could bring another solution in some specific cases. For other supply, mostly heat, the HTR brings a solution inaccessible to conventional nuclear power plants for very high or even high temperature. As fossil fuels costs increase and efforts to avoid generation of Greenhouse gases are implemented, a market for nuclear generated process heat will be developed. Following active developments in the 80's, HTR have been put on the back burner up to 5 years ago. Light water reactors are widely dominating the nuclear production field today. However, interest in the HTR technology was renewed in the past few years. Several commercial projects are actively promoted, most of them aiming at electricity production. ANTARES is today AREVA's response to the cogeneration market. It distinguishes itself from other concepts with its indirect cycle design powering a combined cycle power plant. Several reasons support this design choice, one of the most important of which is the design flexibility to adapt readily to combined heat and power applications. From the start, AREVA made the choice of such flexibility with the belief that the HTR market is not so much in competition with LWR in the sole electricity market but in the specific added value market of cogeneration and process heat. In view of the volatility of the costs of fossil fuels, AREVA's choice brings to the large industrial heat applications the fuel cost predictability of nuclear fuel with the efficiency of a high temperature heat source tree of Greenhouse gases emissions. The ANTARES module produces 600 MWth which can be split into the required process heat, the remaining power drives an adapted prorated electric plant. Depending on the process heat temperature and power needs, up to 80% of the nuclear heat is converted into useful power. An important feature of the design is the standardization of the heat source, as independent as possible of the process heat application. This should expedite licensing. The essential conditions for success include: ${\bullet}$ Timely adapted licensing process and regulations, codes and standards for such application and design ${\bullet}$ An industry oriented R&D program to meet the technological challenges making the best use of the international collaboration. Gen IV could be the vector ${\bullet}$ Identification of an end user(or a consortium of) willing to fund a FOAK
POTENTIAL APPLICATIONS FOR NUCLEAR ENERGY BESIDES ELECTRICITY GENERATION: A GLOBAL PERSPECTIVE
JEAN-CLAUDE GAUTHIER 한국원자력학회 2007 Nuclear Engineering and Technology Vol.39 No.1
Energy supply is increasingly showing up as a major issue for electricity supply, transportation, settlement, and process heat industrial supply including hydrogen production. Nuclear power is part of the solution. For electricity supply, as exemplified in Finland and France, the EPR brings an immediate answer; HTR could bring another solution in some specific cases. For other supply, mostly heat, the HTR brings a solution inaccessible to conventional nuclear power plants for very high or even high temperature. As fossil fuels costs increase and efforts to avoid generation of Greenhouse gases are implemented, a market for nuclear generated process heat will be developed. Following active developments in the 80’s, HTR have been put on the back burner up to 5 years ago. Light water reactors are widely dominating the nuclear production field today. However, interest in the HTR technology was renewed in the past few years. Several commercial projects are actively promoted, most of them aiming at electricity production. ANTARES is today AREVA’s response to the cogeneration market. It distinguishes itself from other concepts with its indirect cycle design powering a combined cycle power plant. Several reasons support this design choice, one of the most important of which is the design flexibility to adapt readily to combined heat and power applications. From the start, AREVA made the choice of such flexibility with the belief that the HTR market is not so much in competition with LWR in the sole electricity market but in the specific added value market of cogeneration and process heat. In view of the volatility of the costs of fossil fuels, AREVA’s choice brings to the large industrial heat applications the fuel cost predictability of nuclear fuel with the efficiency of a high temperature heat source free of Greenhouse gases emissions. The ANTARES module produces 600 MWth which can be split into the required process heat, the remaining power drives an adapted prorated electric plant. Depending on the process heat temperature and power needs, up to 80 % of the nuclear heat is converted into useful power. An important feature of the design is the standardization of the heat source, as independent as possible of the process heat application. This should expedite licensing. The essential conditions for success include: Timely adapted licensing process and regulations, codes and standards for such application and design An industry oriented R&D program to meet the technological challenges making the best use of the international collaboration. Gen IV could be the vector Identification of an end user (or a consortium of) willing to fund a FOAK
Processing and Properties of Steel Foam Sandwiches
Lefebvre Louis-Philippe,Gauthier Maxime,Baril Eric,Voizelle Benoit 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Metallic foams have a combination of attractive properties such as high specific mechanical properties and good energy absorption characteristics. This paper presents the properties of steel foam sandwiches produced using powder metallurgy approach. Metallic powder, solid polymeric binder and a foaming agent are dry-mixed and molded into the desired shape. The molded powder mix is then heat-treated to foam, debind and sinter the material. The resulting material has an open cell structure with high porosity. The structure and properties of sandwiches specimens produced with the process are presented and discussed.
Flow simulation and efficiency hill chart prediction for a Propeller turbine
Vu, Thi,Koller, Marcel,Gauthier, Maxime,Deschenes, Claire Korean Society for Fluid machinery 2011 International journal of fluid machinery and syste Vol.4 No.2
In the present paper, we focus on the flow computation of a low head Propeller turbine at a wide range of design and off-design operating conditions. First, we will present the results on the efficiency hill chart prediction of the Propeller turbine and discuss the consequences of using non-homologous blade geometries for the CFD simulation. The flow characteristics of the entire turbine will be also investigated and compared with experimental data at different measurement planes. Two operating conditions are selected, the first one at the best efficiency point and the second one at part load condition. At the same time, for the same selected operating points, the numerical results for the entire turbine simulation will be compared with flow simulation with our standard stage calculation approach which includes only guide vane, runner and draft tube geometries.
Adaptive Control of Multiple Mobile Manipulators Transporting a Rigid Object
Abdelkrim Brahmi,Maarouf Saad,Guy Gauthier,Wen-Hong Zhu,Jawhar Ghommam 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.4
This paper presents a nonlinear control scheme for multiple mobile manipulator robots (MMR) movinga rigid object in coordination. The dynamic parameters of the handled object and the mobile manipulators areestimated online using the virtual decomposition approach. The control law is designed based on an appropriatechoice of the Lyapunov function candidate. The proposed control design ensures that the position error in theworkspace converges to zero, and the external force error is bounded. Numerical simulations and an experimentalvalidation are carried out for two mobile manipulators transporting an object in order to show the effectiveness ofthe proposed controller.
Fournier, Anick R.,Khanizadeh, Shahrokh,Gauthier, Louis,Gosselin, Andre,Dorais, Martine The Korean Society of Ginseng 2003 Journal of Ginseng Research Vol.27 No.4
Vesicular-arbuscular mycorrhizae (VAM) fungi naturally colonise American ginseng roots and this relationship is highly beneficial to enhance plant productivity. Our goal was to determine the effect of adding two Glomus species (Glomus etuticatum, G. intraradices) on survival, photosynthetic capacity, growth, morphology and root ginsenoside content of one-year-old American ginseng plants grown in a broadleaf forest. While our study revealed that VAM inoculations significantly affected root morphology and Re ginsenoside content, the survival, photosynthetic capacity and root growth of American ginseng plants were not significantly influenced by VAM inoculations. Surface area and volume of rootlets were 16-25% higher for ginseng grown in VAM-inoculated soil compared to those grown in the control plots. Also, Re ginsenoside content was 18 % higher in YAM-inoculated roots compared to controls.
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.