A device for cleaning the tube sheet of a steam generator for a PWR using jets of cleaning liquid

摘要

A device for cleaning a surface of a tube sheet (4) of a heat exchanger using water jets has a rigid stem (22) parallel to a guide rail (17) in a clearance gap of the steam generator bundle (10). The stem (22) is connected at a 1st end to a support (23) for a nozzle carrier (24) consisting of a trolley able to move along the rail (17). At its other end, the stem is connected to a device (21) able to move the stem (22) in translation along the rail (17) and able to rotate the stem about its longitudinal axis. The 1st end of the stem is engaged to a device that transmits the rotation of the stem to the nozzle carrier (24) in order to pivot it. The nozzle carrier is supplied with cleaning liquid through a flexible hose (28) that also passes through the clearance gap of the steam generator bundle in which the rail (17) is mounted.