Search results for "iter-like-wall"

showing 4 items of 4 documents

Novel method for determination of tritium depth profiles in metallic samples

2019

Tritium accumulation in fusion reactor materials is considered a serious radiological issue, therefore a lot of effort has been concentrated on the development of radiometric techniques. A novel method, based on gradual dissolution, for the determination of the total tritium content and its depth profiles in metallic samples is demonstrated. This method allows for the measurement of tritium in metallic samples after their exposure to a hydrogen and tritium mixture, tritium containing plasma or after irradiation with neutrons resulting in tritium formation. In this method, successive layers of metal are removed using an appropriate etching agent in the controlled regime and the amount of evo…

inorganic chemicalsfusionNuclear and High Energy PhysicsMaterials scienceNuclear engineeringchemistry.chemical_elementheliumBlanket114 Physical sciences01 natural sciences010305 fluids & plasmasblanketMetalirradiated berylliumjet0103 physical sciencespolycyclic compounds010306 general physicsHeliumbreeding blanketJet (fluid)Fusiontritiumbehaviororganic chemicalshydrogen diffusiontemperatureiter-like-wallFusion powerfirst wallberylliumCondensed Matter Physicschemistryvisual_arttransportcardiovascular systemvisual_art.visual_art_mediumdepth profileTritiumBerylliumNuclear Fusion
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Comparison of the structure of the plasma-facing surface and tritium accumulation in beryllium tiles from JET ILW campaigns 2011-2012 and 2013-2014

2019

In this study, beryllium tiles from Joint European Torus (JET) vacuum vessel wall were analysed and compared regarding their position in the vacuum vessel and differences in the exploitation conditions during two campaigns of ITER-Like-Wall (ILW) in 2011-2012 (ILW1) and 2013-2014 (ILW2) Tritium content in beryllium samples were assessed. Two methods were used to measure tritium content in the samples - dissolution under controlled conditions and tritium thermal desorption. Prior to desorption and dissolution experiments, scanning electron microscopy and energy dispersive x-ray spectroscopy were used to study structure and chemical composition of plasma-facing-surfaces of the beryllium sampl…

Fuel retentionPhysics::Medical Physics01 natural sciencesQuantitative Biology::Cell Behavior010305 fluids & plasmasiter-like walljoint european torusRETENTION010302 applied physicsJet (fluid)tritiumPhysicsMechanicsSurface (topology)Fusion Plasma and Space Physicslcsh:TK9001-9401surgical procedures operativecardiovascular systemJoint European TorusTritiumBerylliumBerylliumNuclear and High Energy PhysicsretentionTechnology and Engineeringanimal structuresMaterials scienceQuantitative Biology::Tissues and OrgansMaterials Science (miscellaneous)Joint European Toruschemistry.chemical_elementTritium114 Physical sciencesGeneral Relativity and Quantum CosmologyFusion plasma och rymdfysik0103 physical sciencesddc:530ITER-LIKE-WALLITER-like walltechnology industry and agriculturePlasmaiter-like-wallberylliumTRANSPORTfuel retentionbody regionsNuclear Energy and Engineeringchemistrytransportlcsh:Nuclear engineering. Atomic power
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Structure, tritium depth profile and desorption from 'plasma-facing' beryllium materials of ITER-Like-Wall at JET

2017

This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 under grant agreement No 633053 . The views and opinions expressed herein do not necessarily reflect those of the European Commission.

Nuclear and High Energy PhysicsThermal desorption spectroscopyMaterials Science (miscellaneous)Nuclear engineeringJoint European TorusAnalytical chemistryThermal desorptionchemistry.chemical_elementFuel accumulationTritiumThermal desorption7. Clean energy01 natural sciences010305 fluids & plasmasFusion plasma och rymdfysikDesorption0103 physical sciences:NATURAL SCIENCES:Physics [Research Subject Categories]010306 general physicsJet (fluid)ChemistryITER-like wallPlasmaITER-Like-Walllcsh:TK9001-9401Fusion Plasma and Space Physicsrespiratory tract diseasesNuclear Energy and Engineeringcardiovascular systemlcsh:Nuclear engineering. Atomic powerTritiumBerylliumDepth profileBeryllium
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Fuel inventory and material migration of JET main chamber plasma facing components compared over three operational periods

2020

Fuel retention and material migration results from JET ITER-like wall beryllium limiter tiles are presented for three operating periods. Ion beam analysis results support the general picture of erosion during limiter configurations with local deposition on tile ends far into the scrape off layer. Similar trends of fuel concentrations are observed in all JET operating periods; (i) low on surfaces exposed to high heat flux and erosion and (ii) higher in deposits. The pattern of fuel retention and deposition correlates with heat flux and distribution of limiter plasmas touching inner and outer limiters. The D/Be ratio in the thickest deposit is similar to 0.01. Global fuel retention attributed…

DESORPTIONMaterials scienceEROSIONJET ITER-like wallchemistry.chemical_element01 natural sciences114 Physical sciences010305 fluids & plasmasmaterial migrationDesorption0103 physical sciencesDEPOSITION010306 general physicsMathematical PhysicsJet (fluid)ITER-LIKE-WALLDivertorMetallurgyPlasmaCondensed Matter PhysicsberylliumAtomic and Molecular Physics and Opticsfuel retentionchemistryINNER WALLErosionDIVERTORBerylliumDeposition (chemistry)
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