HEAT EXCHANGER CHEMICAL CLEANING METHOD USING LEVEL CONTROL

摘要

PURPOSE: A cleaning solution of the nuclear power plant steam generator is provided to improve the removal efficiency of the sludge or the scale by gradually diversifying concentration and water level of the washing solution being supplied. CONSTITUTION: It is firstly inserted in the site in which for the washing solution of the high concentration, the reaction is necessary first portion. The washing solution which remains when the washing solution of the equivalent canning be reacted is consumed while the reaction is advanced is diluted. The washing solution of the diluted low concentration is applied to the first portion and the other second portion and the second portion is washed.