Patent Number: 
Section: claims

1. A chemical control system for a power plant, comprising:at least one flow-type sensor for coolant electrochemical indication, a unit for measurement data processing and transmission, a central computer (CPC), an actuator for injection of hydrogen and chemical reagents, a sampling tube, a first heat exchanger, a first throttling device, and a coolant supply circuit;the at least one flow-type sensor electrically connected to the unit for measurement data processing and transmission with output of the unit being connected to the central computer, the central computer configured to control the actuator for injection of hydrogen and chemical reagents;a hydraulic inlet of the at least one flow-type sensor for coolant electrochemical indication is configured to be connected by the sampling tube to a process circuit of the power plant;a hydraulic output of the at least one flow-type sensor is hydraulically connected in series to the first heat exchanger and the first throttling device with the coolant supply circuit; andwherein the sampling tube is configured to pass a coolant sample to the at least one flow-type sensor for coolant electrochemical indication and the coolant supply circuit comprises tubes and valves configured to reverse a flow of the coolant sample through the first throttling device. 2. The system as defined in claim 1, wherein the at least one flow-type sensor for coolant electrochemical indication is a flow-type sensor of polarization resistance. 3. The system as defined in claim 1, wherein the at least one flow-type sensor for coolant electrochemical indication is a flow-type sensor of electrochemical potential. 4. The system as defined in claim 1, wherein said system comprises a second heat exchanger, a second throttling device, a second unit for measurement data processing and transmission, and at least one additional sensor selected from the group consisting of: a sensor for dissolved oxygen, a sensor for dissolved hydrogen, a sensor for electrical conductivity, and a pH sensor; the at least one additional sensor installed (i) between the second heat exchanger and the second throttling device or (ii) downstream of the second throttling device; and the second heat exchanger being hydraulically connected to the process circuit, and the at least one additional sensor being electrically connected to the second unit for measurement data processing and transmission with output of the second unit being connected to the central computer. 5. The system as defined in claim 1, wherein the process circuit is a primary process circuit of the power plant.