Device for limiting the rate of flow of pressurised water for cooling the core of a pressurised water nuclear reactor and its use

摘要

The device includes a support and guide element (17) of tubular shape, engaged on the sleeve tube (6) in a coaxial arrangement with respect to the sleeve tube and to the pipe (5) of the instrumentation column (4), and bearing on a radially projecting shoulder (11a) of the sleeve tube (6). A closure element (20), of annular shape, is mounted, movably in the axial direction, on the support and guide element (17). The closure element (20) is slidingly engaged on the sleeve tube (6) and includes a planar end surface (21a) facing towards the end of the instrumentation column (4). A return spring (22) returns the closure element (20) towards the instrumentation column (4) so as to press the planar surface (21a) onto the end of the instrumentation column. The device makes it possible to limit or stop the vibrations of a glove finger (14) engaged in the internal pipe (5) of the instrumentation column (4). IMAGE