STEAM GENERATOR SECONDARY SIDE CLEANING DEVICE WITH FILTERING FUNCTION

摘要

PROBLEM TO BE SOLVED: To improve cleaning capacity while using a small pump without reducing a water supply flow rate and pressure to a pipe group upper part in cleaning of the steam generator secondary side. SOLUTION: This device cleans sludge stuck, fixed or deposited on the secondary side by blowing water from a secondary side upper part by taking the water from hand holes of a steam generator A. Among a plurality of hand holes, at least one place is formed as an intake port 12d of filtering water for filtration. A recirculating system is formed for recirculating the water to a front stage of a recirculating pump of the hand hole 12c or the same or other hand hole existing in the same level difference via a pump P' and a filtering device 13 from the intake port. The water taken from the hand holes 12a and 12b for taking recirculating water is supplied to an upper part of the steam generator A via a pump P, and is filled in the pipe group upper part to be used as a recirculating system.