Technical Servicing | Primary side chemistry online monitoring system (PCS)

PCS has been implemented and installed at Kozloduy NPP by Westinghouse EC, as part of the unit 5 and unit 6 modernization project.

The system continuously monitors specific chemical parameters of three sample streams:

1) Reactor coolant

2) Clean water

3) Makeup

In this manner the plant personnel receives real time information about the composition of the coolant and can much faster react and apply corrective actions, if necessary.

The system is based on modules and components of Dionex, Honeywell, Hach-Lange(Orbisphere).

The monitored chemical parameters are: acidity of the coolant (pH), diluted Hydrogen and Oxygen, cations of Lithium, Sodium, Potassium and Ammonia (Li+, Na+, K+, NH4 +), anions of Chlorine, Fluorine and sulphates (Cl, F, SO4 ).