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NEUTRON NUMBER DENSITY [6 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2015-08-28

English

Subject field(s)
  • Atomic Physics
DEF

The proportionality factor between neutron current density and the negative gradient of the neutron number density.

OBS

diffusion coefficient for neutron number density : term and definition standardized by ISO.

French

Domaine(s)
  • Physique atomique
DEF

Facteur de proportionnalité entre la densité de courant de neutrons et l'opposé du gradient du nombre volumique de neutrons.

OBS

coefficient de diffusion pour le nombre volumique de neutrons : terme et définition normalisés par l'ISO.

Spanish

Save record 1

Record 2 2014-12-10

English

Subject field(s)
  • Atomic Physics
CONT

After the depleted fuel assemblies are removed from the reactor, they are placed in a canister … The canister alone, however, is not sufficient to provide adequate gamma or neutron radiation shielding. Therefore, apparatus that provide additional radiation shielding are required during transport, preparation and subsequent dry storage … The additional shielding is achieved by placing the canisters within large cylindrical containers called casks. Casks are typically designed to shield the environment from the dangerous radiation in two ways. First, shielding of gamma radiation requires large amounts of mass. Gamma rays are best absorbed by materials with a high atomic number and a high density, such as concrete, lead, and steel. The greater the density and thickness of the blocking material, the better the absorption/shielding of the gamma radiation.

French

Domaine(s)
  • Physique atomique
CONT

Le conditionnement des matières radioactives. Le conditionnement est un processus industriel qui met en œuvre : - un matériau de blocage qui immobilise les déchets. Ce matériau constitue la matrice - une (ou plusieurs) enveloppe(s), dans laquelle (lesquelles) les déchets immobilisés sont placés, facilitant ainsi principalement la manutention. L’ensemble est appelé colis.

Spanish

Save record 2

Record 3 2014-06-12

English

Subject field(s)
  • Atomic Physics
DEF

A fictitious flux density equal to the product of the total number of neutrons per cubic metre and a neutron speed of 2 200 m/s [metre per second. ]

OBS

2 200 m/s flux density; conventional flux density: terms and definition standardized by ISO.

Key term(s)
  • 2 200 metre per second flux density
  • 2 200 meter per second flux density
  • 2200 metre per second flux density
  • 2200 meter per second flux density

French

Domaine(s)
  • Physique atomique
DEF

Densité de flux fictive égale au produit du nombre total des neutrons par mètre cube, par une vitesse des neutrons de 2 200 m/s [mètres par seconde].

OBS

densité de flux de 2 200 m/s; densité de flux conventionnelle : termes et définition normalisés par l'ISO.

Key term(s)
  • densité de flux de 2 200 mètres par seconde
  • densité de flux de 2200 mètres par seconde

Spanish

Save record 3

Record 4 2010-12-15

English

Subject field(s)
  • Atomic Physics
DEF

At a given point in space, the number of neutrons incident on a small sphere in a time interval divided by cross sectional area of that sphere and by the time interval.

CONT

Neutron flux density is the number of neutrons passing through a one square centimeter flat sheet per second in any direction.

French

Domaine(s)
  • Physique atomique
CONT

Le débit de fluence est le nombre de neutrons traversant une surface plane de un centimètre carré par seconde, dans n'importe quelle direction.

Spanish

Campo(s) temático(s)
  • Física atómica
Save record 4

Record 5 2002-10-23

English

Subject field(s)
  • Chemistry
  • Atomic Physics
  • Nuclear Power Stations
DEF

The number of free neutrons per unit volume. Partial densities may be defined for neutrons characterized by such parameters as energy and direction.

OBS

neutron (number) density

Key term(s)
  • neutron density

French

Domaine(s)
  • Chimie
  • Physique atomique
  • Centrales nucléaires
OBS

Nombre de neutrons libres par unité de volume. Des nombres partiels peuvent être définis pour des neutrons caractérisés par des paramètres tels que l'énergie et la direction.

Spanish

Save record 5

Record 6 - external organization data 2002-03-27

English

Subject field(s)
  • Chemistry
  • Atomic Physics
  • Compartment - Canadian Nuclear Safety Commission
DEF

A scalar quantity expressing the concentration of neutrons around a point as the product of neutron density and speed, i. e., the number of neutrons passing through one square centimeter in any direction in one second.

French

Domaine(s)
  • Chimie
  • Physique atomique
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

Le flux de neutrons est le nombre de réactions par centimètre carré et par seconde, sur une cible contenant N noyaux par cm carré.

Spanish

Campo(s) temático(s)
  • Química
  • Física atómica
  • Compartimiento - Comisión Canadiense de Seguridad Nuclear
Save record 6

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