Sludge removing apparatus for a steam generator.

摘要

A steam generator is provided with a manifold (40) having a plurality of nozzles (42) for breaking up and washing away sludge which has formed on the upper surface of the steam generator tube sheet (22). The manifold (40) is rigidly attached to the upper surface of the tube sheet (22) and remains in place during normal operation of the steam generator. High velocity streams of water are used to break up and remove sludge from the upper surface of the tube sheet to discharge therethrough openings (46) provided in the shell (12) of the steam generator. With this arrangement, sludge removal operation can be automatically performed without exposure of personnel to radiation.