multiplier pebble beds
French translation: les lits de boulets à beryllium multiplicateur de neutrons
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| 13:44 Mar 6, 2010 |
| English to French translations [PRO] Tech/Engineering - Nuclear Eng/Sci | |||||||
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|  Selected response from: FX Fraipont (X) Belgium Local time: 06:28 | ||||||
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| 3 | les lits de boulets à beryllium multiplicateur de neutrons |
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Answers
48 mins confidence: 
les lits de boulets à beryllium multiplicateur de neutrons Explanation: "Résumé / Abstract In the design of the European Helium-Cooled Pebble Bed (HCPB) Blanket, the use of beryllium as a neutron multiplier in the form of a pebble bed is foreseen. In the development of the pebble bed, kinetic data are needed for the reaction between the beryllium pebbles and air. Therefore, thermogravimetric experiments were conducted to study the pebbles' behaviour when exposed to air in the temperature region 400-900 °C. The material tested consisted of beryllium pebbles produced by the Rotating Electrode Method. At temperatures up to 700 °C, the reaction kinetics is approximately parabolic, although a deviation from parabolic behaviour is observed after approximately 6000 s of air exposure. Above 700 °C, a combination of paralinear and accelerating behaviour is observed. From the experimental results the appropriate rate constants were determined by curve fitting." http://cat.inist.fr/?aModele=afficheN&cpsidt=13416577 -------------------------------------------------- Note added at 48 mins (2010-03-06 14:32:49 GMT) -------------------------------------------------- "existe en tout 6 technologies: un réacteur à neutrons rapides refroidi au ...... en cycle combiné avec contrôle des goudrons (combustion en lit fixe ou fluidisé circulant,…). ... Pour les deux premières configurations, on utilise des boulets ou ...... avec comme matériau multiplicateur de neutrons, le béryllium ou ..." http://energie.cnrs.ensma.fr/reflexion/livre_blanc.pdf -------------------------------------------------- Note added at 49 mins (2010-03-06 14:33:27 GMT) -------------------------------------------------- "delayed neutron fraction fraction de neutrons retardés ... delayed neutron precursor précurseur de neutrons retardés ...... réacteur à lit de boulets ..." http://www.aeoi.org.ir/Portal/File/ShowFile.aspx?ID=4cb92699... |
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