Apparatus, method and component for the loading of fuel...

G - Physics – 21 – C

Patent

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G21C 21/02 (2006.01)

Patent

CA 2417920

Apparatus for containing nuclear fuel material within a containing environment, a method of loading nuclear fuel pellets into a fuel rod and a component for use during the loading of nuclear fuel pellets into a fuel rod as provided by the invention. The invention aims to reduce contamination of the outside of the fuel rod with fuel pellet material during the loading process. In particular the invention offers apparatus including an axis along which a fuel rod to be loaded is introduced, a sealing unit provided between the contaminated environment and a non-contaminated environment, the sealing unit including a first seal, a second seal and an extendible part, the first and second seals being attached to the extendible part, the sealing unit having a first state and a second state, the sealing unit having a greater extent along the axis in the second state than in the first. The first seal may be in the form of a disc having a through aperture with the second seal being a resiliently deformable seal which opens about its middle, the second seal being provided closer to the contaminated environment than the first.

L'invention concerne un appareil destiné à contenir une matière combustible nucléaire dans un environnement confiné, un procédé de chargement de pastilles de combustible dans une barre de combustible et un composant à utiliser pendant le chargement de pastilles de combustible nucléaire dans une barre de combustible selon l'invention, le tout permettant la réduction de la contamination de l'extérieur de la barre de combustible par la matière des pastilles de combustible, pendant le processus de chargement. L'invention porte, plus particulièrement, sur un appareil possédant un axe le long duquel une barre de combustible à charger est introduite, une unité d'étanchéification prévue entre l'environnement contaminé et l'environnement non contaminé, unité comportant un premier joint, un second joint et une partie extensible, les premier et second joints étant fixés à cette dernière . Ladite unité d'étanchéification peut se trouver dans un premier ou un second état et est plus longue dans le sens axial lorsqu'elle se trouve dans le second état. Le premier joint peut se présenter sous la forme d'un disque possédant une ouverture traversante et le second joint peut être un joint déformable élastiquement, ouvert en son milieu et prévu plus près de l'environnement contaminé que le premier joint.

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