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NEUTRON MULTIPLICATION FACTOR [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2009-10-07

English

Subject field(s)
  • Atomic Physics
DEF

The average number of neutrons that go on to cause another fission reaction.

OBS

The remaining neutrons either fail to induce fission, or are never absorbed and exit the system. The value of k for a combination of two masses is always greater than of its components. In some cases its value is equal to the sum of the component k values. The magnitude of the difference depends on velocity and distance, as well as physical orientation.

French

Domaine(s)
  • Physique atomique
CONT

Un accident de criticité survient lorsque le coefficient de multiplication des neutrons (k eff, rapport entre le nombre de neutrons produits par fission et le nombre de neutrons disparaissant par capture ou par fuite hors du système considéré) dans un milieu fissile devient supérieur à 1.

Spanish

Save record 1

Record 2 - external organization data 2005-11-10

English

Subject field(s)
  • Calculating Procedures (Mathematics)
  • Atomic Physics
  • Nuclear Fission Reactors
  • Compartment - Canadian Nuclear Safety Commission
CONT

Reactivity mechanisms change the value of the neutron multiplication factor in the reactor core. Most affect the parasitic absorption of thermal neutrons in the core. When a device increases the parasitic absorption in a core it is said to be adding negative reactivity. If a device is decreasing the parasitic absorption it is adding reactivity.

French

Domaine(s)
  • Procédés de calcul (Mathématiques)
  • Physique atomique
  • Réacteurs nucléaires de fission
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

Les mécanismes de contrôle de la réactivité changent la valeur du facteur de multiplication des neutrons dans le coeur du réacteur. La plupart d'entre eux ont une incidence sur l'absorption parasite des neutrons thermiques dans le coeur. Lorsqu'un dispositif augmente l'absorption parasite dans un coeur, on dit qu'il ajoute de la réactivité négative. On dit des dispositifs qui diminuent l'absorption parasite qu'ils ajoutent de la réactivité.

Spanish

Save record 2

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