Abstract: Chemical control system for a power plant including at least one coolant electrochemical indication sensor of a flow type electrically connected to the measurement data processing and transmission unit with its outlet connected to a central computer (CPC) controlling the actuator for injection of hydrogen and chemical reagents. The hydraulic inlet of the electrochemical sensor in use of the system is connected by a sampling tube to the power plant process circuit and its hydraulic outlet is hydraulically connected to the first heat exchanger and the first throttling device with a coolant supply circuit in series. The sampling tube is configured to pass a coolant sample to the coolant electromechanical sensor and the coolant supply circuit contains tubes and valves configured to reverse the flow of the coolant sample through the first throttling device.

Abstract: A method of corrosion rate control of nuclear power plants process circuits equipment. The electrochemical potential of the structural material of heat exchanging tubes and the specific electrical conductivity of blowdown water in steam generators are measured, the polarization resistance of the structural material of the pipelines of the condensate-feeding path and the specific electrical conductivity of feed water in steam generators are measured, and these parameters are automatically averaged and compared with the rated values, which determine various degrees of corrosion activity in relation to the material of pipelines of the feed water circuit in steam generators. Depending on the data comparison, no actions are taken, coolant parameters are adjusted, or the power unit is shut down.

Abstract: The power plant chemical control system includes at least one coolant electrochemical indication sensor electrically connected to the measurement data processing and transmission unit with its outlet connected to a central computer controlling the actuation devices and for injection of hydrogen and chemical reagents. The sensor is of a flow type with its hydraulic inlet connected by a sampling tube to the power plant process circuit and its hydraulic outlet hydraulically connected to the first heat exchanger and to the first throttling device with a reversible coolant supply circuit in series.