FIELD: polymer materials in nuclear-power engineering. SUBSTANCE: invention provides high-purity polymer dispersant and scale conditioner added to feeding water entering secondary line of continuously functioning steam generator. High-purity polymer is selected from group composed of acrylic acid polymer, methacrylic acid polymer, polyacrylate, polymethacrylate, copolymers and terpolymers, acrylate/acrylamide copolymer, acrylate/methacrylate copolymer, and their mixtures. Invention also provides means for removal of metal oxides and polymer from discharge stream. EFFECT: prevented formation of scale, rust, or metal oxide deposits in secondary line of steam generator in the course of all operation phases. 52 cl, 1 dwg, 2 tbl
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