TERMIUM Plus®

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MULTIGROUP ENERGY APPROXIMATION [1 record]

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Record 1 2017-04-26

English

Subject field(s)
  • Calculating Procedures (Mathematics)
  • Nuclear Physics
CONT

The theory of the multigroup energy approximation. The multigroup energy approximation in radiation transport assumes that [an] energy domain … is partitioned into … intervals of width … By convention the energy decreases with increasing group number.

Key term(s)
  • multi-group energy approximation

French

Domaine(s)
  • Procédés de calcul (Mathématiques)
  • Physique nucléaire
CONT

[…] les erreurs systématiques provenaient non seulement des incertitudes sur les données fondamentales de base (sections microscopiques) mais aussi des approximations méthodologiques. Parmi ces dernières, on peut citer la séparation espace-direction angulaire-énergie des neutrons dans les calculs spectraux, la non-utilisation systématique de modélisation tridimensionnelle et l’approximation énergétique multigroupe dans les études de projets industriels. Ces études sont relatives à des calculs de cœurs de réacteurs, des piscines de stockage d’assemblages usés, des calculs de protection et toutes autres études mettant en jeu des neutrons.

Spanish

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