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PELLET CLADDING INTERACTION FAILURE [1 record]

Record 1 2009-09-18

English

Subject field(s)
  • Rheology
  • Deterioration of Metals
  • Nuclear Fission Reactors
CONT

Pellet cladding interaction (PCI) failures are due to stress corrosion cracking in the cladding material, which is associated with local power ramps during reactor startup or maneuvering (i.e. rod adjustment/swaps, local follow).

French

Domaine(s)
  • Rhéologie
  • Altération des métaux
  • Réacteurs nucléaires de fission
CONT

Interaction pastille de combustible-gaine : au cours de l'irradiation, la pression de l'eau induit un fluage de la gaine (Zircaloy-4) qui se plaque sur la pastille, comblant le jeu entre la pastille et la gaine. Les dilatations thermiques de la pastille sont ainsi transmises à la gaine. Le phénomène de rupture du gainage par interaction pastille-gaine est dû alors à la conjonction des contraintes induites par la dilatation de la pastille et d'une attaque chimique interne de la gaine par l'iode.

Spanish

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