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US 4,493,813 AGranted
Neutron protection device
AssigneeCommissariat a l'Energie Atomique
InventorsPierre Loriot, Michel Rendu, Jean Rousseau
Life of this patent
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Abstract
The present invention relates to an upper neutron protection device for a nuclear reactor assembly. This device comprises at least one container partly filled with a neutron-absorbing product and maintained within a wall located in the upper part of the assembly by at least one spacing plate. Application to fast neutron reactors.
Claims11
In a nuclear reactor fuel assembly comprising a foot and an assembly body connected to the foot having an upper part and a lower part, an upper neutron protection device comprising:
- a wall of substantially hollow shape and having an inner face and an outer face, said wall being fixed to said assembly body at the upper part thereof,
- at least one container comprising:
- a closed outer cylindrical envelope,
- an inner cylindrical envelope placed within said outer cylindrical envelope and whose thickness is smaller than the thickness of the outer envelope,
- a deformable tube located inside said inner cylindrical envelope and defining a space between said deformable tube and said inner cylindrical envelope, said space being incompletely filled with a product having a high neutron absorption cross-section, said at least one container being disposed within said wall and maintained by at least one spacing plate which is fixed to the inner face of the wall.
2 more elements
Dependencies are inferred from the claim text.