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AbstractAbstract
[en] The purpose of this thesis is to qualify the APOLLO calculus of light water under moderated reactors (RSM) fundamental parameters starting from results of ERASME experiences. The first part presents the RSM physics and the particularities of neutronic spectrum. The uncertainties on fundamental parameters are evaluated and the necessity of fundamental qualification basis is demonstrated. The second part is consecrated at ERASME experiences and at the interpretation of results given by the APOLLO code. Our interpretation has shown that the data base CEA-86 associated with the calculation procedures are qualified in all the neutron energy range of RSM. In other part, the uncertainties on fundamental parameters are reduced by a factor 4 owing to ERASME experiences. Now, the APOLLO code associated with the CEA-86 procedure, gives the neutronic parameters of RSM with an error compatible with the project calculations
[fr]
Cette these vise a qualifier le calcul APOLLO des parametres fondamentaux des Reacteurs Sous-Moderes a l'eau legere a partir des mesures effectuees dans les experiences ERASME. La premiere partie presente la physique des RSM et les particularites du spectre neutronique. Les incertitudes sur les parametres fondamentaux y sont evaluees et la necessite de disposer d'une base de qualification experimentale y est egalement demontree. La deuxieme partie est consacree aux experiences ERASME et a l'interpretation par le code APOLLO des resultats obtenus. Notre interpretation a montre que les donnees de base de la bibliotheque recommandee CEA-86 associees aux procedures de calcul, etaient qualifiees dans toute la gamme d'energie representative des Reacteurs Sous-Moderes. D'autre part, grace aux mesures realisees dans ERASME, les incertitudes sur les parametres fondamentaux des RSM ont ete reduites d'un facteur 4 en moyenne. Desormais, le code APOLLO, associe a la procedure recommandee CEA-86, fournit les parametres neutroniques des Reacteurs Sous-Moderes avec une erreur compatible avec les calculs de projetOriginal Title
Qualification des proprietes neutroniques des reacteurs sous-moderes a l'eau legere
Primary Subject
Source
Jun 1988; 207 p; These (D. Ing.).
Record Type
Report
Literature Type
Thesis/Dissertation
Report Number
Country of publication
ACTINIDE COMPOUNDS, BARYONS, CHALCOGENIDES, COMPUTER CODES, ELEMENTARY PARTICLES, ELEMENTS, ENERGY SOURCES, ENRICHED URANIUM REACTORS, FERMIONS, FUELS, HADRONS, HEAVY WATER COOLED REACTORS, HEAVY WATER MODERATED REACTORS, MATERIALS, NEUTRONS, NUCLEAR FUELS, NUCLEONS, OXIDES, OXYGEN COMPOUNDS, PLUTONIUM COMPOUNDS, POWER REACTORS, REACTOR MATERIALS, REACTORS, RESEARCH AND TEST REACTORS, RESEARCH REACTORS, SEMIMETALS, SOLID FUELS, SPECTRA, TANK TYPE REACTORS, THERMAL REACTORS, TRANSURANIUM COMPOUNDS, WATER COOLED REACTORS, WATER MODERATED REACTORS
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