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FLUX FLATTENING [2 records]
Record 1 - internal organization data 2015-04-24
Record 1, English
Record 1, Subject field(s)
- Nuclear Physics
- Nuclear Fission Reactors
Record 1, Main entry term, English
- flux flattening
1, record 1, English, flux%20flattening
correct, standardized
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
The achievement of an approximately uniform neutron flux density in a reactor core, for example, by the introduction of neutron absorbers or nuclear fuel of low fissile content. 1, record 1, English, - flux%20flattening
Record number: 1, Textual support number: 1 OBS
flux flattening: term and definition standardized by ISO. 2, record 1, English, - flux%20flattening
Record 1, French
Record 1, Domaine(s)
- Physique nucléaire
- Réacteurs nucléaires de fission
Record 1, Main entry term, French
- aplatissement du flux
1, record 1, French, aplatissement%20du%20flux
correct, masculine noun, standardized
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Obtention d'une densité de flux de neutrons approximativement uniforme dans le cœur d'un réacteur, par exemple par l'introduction d'absorbeurs de neutrons ou de combustible nucléaire de faible teneur en substance fissile. 1, record 1, French, - aplatissement%20du%20flux
Record number: 1, Textual support number: 1 OBS
aplatissement du flux : terme et définition normalisés par l'ISO. 2, record 1, French, - aplatissement%20du%20flux
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - external organization data 2005-08-24
Record 2, English
Record 2, Subject field(s)
- Atomic Physics
- Nuclear Fission Reactors
- Compartment - Canadian Nuclear Safety Commission
Record 2, Main entry term, English
- neutron flux flattening 1, record 2, English, neutron%20flux%20flattening
Record 2, Abbreviations, English
Record 2, Synonyms, English
- flux flattening 1, record 2, English, flux%20flattening
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
During normal, long-term operation, the exposure of the fuel to neutrons varies from place to place in the reactor. The fuelling engineer selects fuel replacement times and places to even out the availability of neutrons across the core. This is known as neutron flux flattening. The oldest fuel, which absorbs many neutrons uselessly, is left longer in areas of the core where the neutron flux tends to be high. Fresh fuel, which gives a higher rate of fission per neutron, is inserted into regions where the neutron flux is lower. 1, record 2, English, - neutron%20flux%20flattening
Record 2, French
Record 2, Domaine(s)
- Physique atomique
- Réacteurs nucléaires de fission
- Tiroir - Commission canadienne de sûreté nucléaire
Record 2, Main entry term, French
- aplanissement du flux neutronique
1, record 2, French, aplanissement%20du%20flux%20neutronique
masculine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
- aplanissement du flux 1, record 2, French, aplanissement%20du%20flux
masculine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
Combustible appauvri et aplanissement du flux neutronique. [...] En cours de fonctionnement normal, sur une longue période, l'exposition du combustible aux neutrons varie d'un endroit à l'autre du réacteur. Pour égaliser la disponibilité des neutrons dans le coeur, l'ingénieur responsable de son alimentation choisit le moment où l'on remplacera des grappes et dans quel emplacement les insérera-t-on. Ce travail s'appelle l'aplanissement du flux. Parce que le combustible plus vieux absorbe inutilement un grand nombre de neutrons, on le laisse plus longtemps dans les régions du coeur où le flux de neutron est spontanément plus élevé. On insère le combustible frais, dont le nombre de fissions par neutron est plus élevé, dans les régions où le flux de neutron est moins élevé. 1, record 2, French, - aplanissement%20du%20flux%20neutronique
Record 2, Spanish
Record 2, Textual support, Spanish
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