[en] In this report two types of systems for cleaning of internal pipe surface of heater are presented. ATCS is a patented system based on the concept of using of sponge balls which are injected into the internal pipe surface. The balls, drifted by the water flow, are used for cleaning the internal pipe surface. The other system is based on hydro-electro-impulse. The comparison between both system is given. The following disadvantages of the methods are also discussed: extra volume of radioactive water; the system can be used only during the planned maintenance; high level of personnel exposure ect