公开(公告)号：US12272464B2

公开(公告)日：2025-04-08

申请号：US17628501

申请日：2019-07-22

Applicant: Framatome Inc.

Inventor： Ryan Melcher ,  Joseph Gallagher Baier ,  James Andrew Spencer

IPC: G21C13/036 ,  G21C17/017 ,  G21C19/20 ,  G21C7/12 ,  G21C13/032

Abstract: A method for replacing a damaged sleeve lining a tube passing through a nuclear reactor pressure vessel. The damaged sleeve has an end including a radially enlarged end portion for resting on a support section of the tube for retaining the damaged sleeve in the tube. The method includes removing the damaged sleeve from a tube; providing a sleeve assembly including a first sleeve with a radially variable end and a retainer; installing the sleeve assembly in the tube so the radially variable end of the first sleeve is received by the support section, the radially variable end being in a radially contracted configuration during installation and being in a radially expanded configuration after the sleeve assembly is installed in the tube; and deforming the retainer from an installation configuration to a retention configuration to retain the radially variable end of the first sleeve in the radially expanded configuration.