Critical experiments in AQUILON with fuels slightly enriched in uranium 235 or in plutonium
Creators
- 1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires
Description
Reactivity comparisons have been, made in Aquilon II between geometrically identical lattices differing only by the composition of the fuel. The fuel elements consist in metallic uranium single rods with either slight differences of the isotopic composition (0.69 - 0.71 - 0.83 - 0.86 per cent of uranium 235) or slight additions of plutonium (0.043 per cent). Five lattices pitches have bean used, in order to produce a large variation of spectrum. Two additional sets of plutonium fuels are prepared to be used in the same conditions. The double comparisons: natural enriched 235 versus natural-enriched plutonium are made in such a way that a very precise interpretation is permitted. The results are perfectly consistent which seems to prove that the calculation methods are convenient. Further it can been inferred that the usual data, namely for the ratio of the η of 235U and 239Pu seem reliable. (authors)
Availability note (English)
Available from INIS in electronic formAbstract (French)
On a compare neutroniquement dans Aquilon II des reseaux geometriquement identiques mais comportant de petites differences de composition du combustible. EL s'agit de barres d'uranium metallique, les unes avec des teneurs differentes en isotopes 235 (0,69 - 0,71 - 0,83 - 0,86 pour cent) les autres comportant une legere addition de plutonium (0,043 pour cent). Les comparaisons ont ete faites a cinq pas differents, de maniere a mettre en jeu une assez large variation de spectre. Deux autres jeux de combustible au plutonium seront utilises ulterieurement dans les memes conditions. Les resultats des mesures se presentent sous forme de doubles comparaisons: naturel-enrichi 235/naturel-enrichi plutonium. On s'est place dans des conditions qui permettent des interpretations tres precises. Les resultats sont remarquablement coherents, ce qui semble montrer que les methodes de calcul sont bien adaptees, Ils tendent d'autre part a prouver que les valeurs numeriques admises dans la litterature, notamment pour le rapport des η de l'U 235 et de Pu 239, sont correctes. (auteurs)Files
37077155.pdf
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Additional details
Additional titles
- Original title (French)
- Experiences critiques dans aquilon portant sur des combustibles legerement enrichis en uranium 235 et en plutonium
Publishing Information
- Imprint Pagination
- 27 p.
- Report number
- CEA-R--2477
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 37077155
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Descriptors DEI
- AQUILON REACTOR; CALCULATION METHODS; COMPARATIVE EVALUATIONS; CRITICALITY; ENRICHED URANIUM; ISOTOPE RATIO; NEUTRON SPECTRA; NUCLEAR FUELS; PLUTONIUM; URANIUM 235
- Descriptors DEC
- ACTINIDE NUCLEI; ACTINIDES; ALPHA DECAY RADIOISOTOPES; DIMENSIONLESS NUMBERS; ELEMENTS; ENERGY SOURCES; EVALUATION; EVEN-ODD NUCLEI; EXPERIMENTAL REACTORS; FUELS; HEAVY NUCLEI; HEAVY WATER COOLED REACTORS; HEAVY WATER MODERATED REACTORS; INTERNAL CONVERSION RADIOISOTOPES; ISOMERIC TRANSITION ISOTOPES; ISOTOPE ENRICHED MATERIALS; ISOTOPES; MATERIALS; METALS; MINUTES LIVING RADIOISOTOPES; NATURAL URANIUM REACTORS; NUCLEI; RADIOISOTOPES; REACTOR MATERIALS; REACTORS; RESEARCH AND TEST REACTORS; SPECTRA; SPONTANEOUS FISSION RADIOISOTOPES; TANK TYPE REACTORS; THERMAL REACTORS; TRANSURANIUM ELEMENTS; URANIUM; URANIUM ISOTOPES; YEARS LIVING RADIOISOTOPES; ZERO POWER REACTORS
Optional Information
- Notes
- 10 refs.