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AssigneeSiemens Aktiengesellschaft
InventorsTilo Landgraf, Rainer Kunz, Johann Ropers, Martin Zenkel
Estimating the term…
A method and assembly for securing a cylindrical centering pin in a bore formed in a plate includes introducing an end of a centering pin to be secured to a plate into a bore formed in the plate until at least part of a coaxial, radially deformable wall portion of the end to be secured protrudes beyond the plate; and generating pressure in a closed hollow space surrounded by the wall portion with a pressure fluid until the wall portion radially expands and anchors the centering pin. According to another method and assembly, the end is introduced into the bore until at least part of the end to be secured, which has a periphery and an interior with radial slits formed therein, protrudes beyond the plate; and a mandrel-like tool is partially brought into the slits in the interior of the end of the centering pin and radially expands the end of the centering pin with the tool for anchoring the centering pin.
In a nuclear reactor, a combination of a reactor core plate and an assembly for securing a cylindrical centering pin of a fuel assembly in a bore formed in the reactor core plate, said assembly comprising a cylindrical centering pin having an end to be secured in a bore in the core plate, said end having a periphery with radial slits formed therein and an interior with radial slits formed therein, said slits extending in the longitudinal direction of said centering pin, said slits formed in said periphery being offset from said slits formed in said interior, and means in the form of a mandrel-like tool partly inserted into said slits formed in said interior for radially expanding said end of said centering pin.
In a nuclear reactor, an assembly for securing a cylindrical centering pin of a nuclear fuel assembly in a bore formed in a reactor core plate, comprising a cylindrical centering pin of a fuel assembly having an end to be secured in the bore in the reactor core plate, said end having a radially expandable wall portion, said centering pin being movable in the bore until at least part of said expandable wall portion protrudes beyond the plate and means associated with said expandable wall portion for expanding said wall portion and anchoring the centering pin the bore.
Dependencies are inferred from the claim text.