Czechia – Electricity distribution and control apparatus – 8525_Rozšíření měření hydrazinu v dochlazování a umožnění měření kyslíku v dochlazování

The subject is the processing of the documentation part, supply and subsequent implementation of the work „8525_Extension of hydrazine measurement in cooling and enabling oxygen measurement in cooling“ at Dukovany NPP in the form of a „turnkey“ supply. Specifically, this involves supplementing the measurement of hydrazine concentration in the secondary circuit of each RB with the required maximum measurement range. Control measurement of oxygen concentration will be introduced by connecting existing O2 analyzers to condensate samples at the discharge of cooling pumps. The control software of the PLCs SAIA (SA11, SA02) will be modified. New technological screens for controlling dosing pumps will be added to ControlWeb, and existing measurement screens will be extended with information from the new KCHA hydrazine concentration N2H4. The subject of the fulfillment will also include the replacement of the existing dosing pumps 1.04.3.25.1(2); 2.54.3.25.1 and 3.04.3.25.1(2); 4.54.3.25.1 located in the engine rooms 1. and 3. block at -5.5 m at the B22 and B222 columns with new dosing pumps.