초록 ▼

A novel high-purity polymer dispersant and sludge conditioner added to the feedwater entering the secondary side of a nuclear steam generator for minimizing the accumulation of metal-oxide deposits within the nuclear steam generator during the continuing operation of the generator is disclosed. The

A novel high-purity polymer dispersant and sludge conditioner added to the feedwater entering the secondary side of a nuclear steam generator for minimizing the accumulation of metal-oxide deposits within the nuclear steam generator during the continuing operation of the generator is disclosed. The high-purity polymer is selected from a group consisting of acrylic acid polymer, methacrylic acid polymer, acrylate polymer, methacrylate polymer, copolymers, and terpolymers, acrylate/acrylamide copolymer, acrylate/methacrylate copolymer, terpolymers, and mixtures thereof. Methods of making and applying the polymer dispersant and sludge conditioner are described. Means for removing the metal oxides and polymer from the blowdown stream are disclosed.

대표청구항 ▼

1. A method of accelerating the removal of existing metal-oxide from the secondary side of a nuclear steam generator during a start-up operation of the generator, which comprises the step of adding a polymer dispersant to the feedwater entering the nuclear steam generator, with said polymer dispersa

1. A method of accelerating the removal of existing metal-oxide from the secondary side of a nuclear steam generator during a start-up operation of the generator, which comprises the step of adding a polymer dispersant to the feedwater entering the nuclear steam generator, with said polymer dispersant being selected from a group consisting of acrylic acid polymer, methacrylic acid polymer, acrylate polymer, methacrylate polymer, copolymers, and terpolymers, acrylate/acrylamide copolymer, acrylate/methacrylate copolymer, terpolymers, and mixtures thereof, and wherein said iron in said feedwater is above normal guideline of five parts per billion.