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AbstractAbstract
[en] A simple, fast and sufficiently accurate method to interpret measurements of reactivity effects from sample oscillations is defined. This first-order perturbation method, based on the collision probability theory, accounts for the position of the sample in the cell and for the flux perturbation due to the sample and to its self-shielding. The method has been applied to a set of reactivity experiments carried out on a series of Pu or U cores in the Masurca, Sneak and Hermine assemblies; these provided basic information, especially on the capture cross-sections of Pu-239, U-238, higher isotopes of Pu and structural materials
[fr]
On definit une methode simple, rapide et suffisamment precise pour interpereter les mesures d'effets de reactivite a partir des oscillations d'echantillons. Cette methode de perturbation au premier ordre, basee sur la theories des probabilites de collision, tient compte de la position de l'echantillon dans la cellule, de la perturbation du flux due a l'echantillon et a l'autoprotection de l'echantillon. On a applique cette methode a un ensemble d'experiences de reactivite realisees sur une serie de coeurs Pu ou U dans les assemblages Masurca, Sneak, Ermine; on a pu ainsi obtenir des informations sur les donnees de base, en particulier les sections efficaces de capture de Pu-239, U-238, des isotopes superieurs de Pu et des materiaux de structureOriginal Title
Analyse des coefficients de reactivite mesures dans les assemblages critiques rapides. Application aux elements fissiles dans MASURCA
Primary Subject
Source
1973; vp; These (3e Cycle).
Record Type
Miscellaneous
Literature Type
Thesis/Dissertation; Numerical Data
Report Number
Country of publication
ACTINIDE NUCLEI, AIR COOLED REACTORS, ALPHA DECAY RADIOISOTOPES, BARYON REACTIONS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, CROSS SECTIONS, DATA, DATA FORMS, ENRICHED URANIUM REACTORS, EPITHERMAL REACTORS, EVEN-EVEN NUCLEI, EVEN-ODD NUCLEI, EXPERIMENTAL REACTORS, FAST REACTORS, GAS COOLED REACTORS, HADRON REACTIONS, HEAVY NUCLEI, INFORMATION, ISOTOPES, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, NUMERICAL DATA, PLUTONIUM ISOTOPES, PLUTONIUM REACTORS, RADIOISOTOPES, REACTORS, RESEARCH AND TEST REACTORS, RESEARCH REACTORS, URANIUM ISOTOPES, YEARS LIVING RADIOISOTOPES, ZERO POWER REACTORS
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