2. Secondary chemistry

2.1 Secondary school issues

The secondary circuit converts the thermal energy produced by the nuclear boiler into mechanical energy. Waste heat is evacuated by the cold source constituted by a steam condenser. Steam from the steam generators (SGs) is fed into the high-pressure turbine casing that drives the alternator (figure 1 ). As an example, for the 1,300 MWe stage, the total steam flow is 2.2 t/s, and the temperature is 289°C. Temperature and pressure variations are significant: around 250°C between hot and cold points and 71.5 bar between GV and condenser...