How to control the corrosion rate of technological circuit equipment of nuclear power plant

摘要

As a method of controlling the corrosion rate of equipment in the technical circuit of a nuclear power plant, the electrochemical potential of the structural material of the heat exchange tube and the electrical conductivity value of the purified water of the steam generator are measured. Measure the polarization resistance values of the structural material of the pipeline of the condensate supply path and the electrical conductivity of the feed water of the steam generator and automatically average these parameters and compare them with the standardized values. The electrical conductivity values of the electrochemical potential and the purified water of the steam generator are two variable nomograms for the purified water divided into zones A, B, D and F, with the coordinates "electrochemical potential of the cationized sample-electrical conductivity". In the form of dots. The zone characterizes the degree of corrosive activity on the heat exchange material of the purifying water pipe of the steam generator, depending on the operating conditions. The value of the polarization resistance and the specific electrical conductivity of the feed water of the steam generator is the point on the two-parameter nomogram with the "polarization resistance-H-cationic sample of electrical conductivity" coordinates of the feedwater divided by the zones G, Y, X, Z. It is represented in the form of. The zones characterize different degrees of corrosive activity in relation to the material of the steam generator feed water circuit pipeline, depending on the operating regime. Depending on the position of the point in the area of one of the two parameter nomograms no action is taken, coolant parameter adjustments are made or the power supply is stopped.