There is no need for the shut-down of power units because of the water temperature increase in the Danube
The hot summer weather prevailing during the previous days as well as further expected temperature records and – as a consequence – increase of the water temperature of the Danube affects the efficiency of power plant condensers.
Since the power units operate using the freshwater cooling system (i.e. the water taken directly from the Danube is used for cooling the turbine condensers), the thermal efficiency of the power units deteriorates along with the increase of the Danube water temperature. As a result, the amount of electricity generated by the nuclear power plant decreases as well. In case of an extremely high water temperature in the Danube, there is a possibility of the further temporarily decrease of the unit power.
Strict limitations are applied in respect of the cooling water discharge by the power plant. According to the requirement, at the distance of 500 m from the cooling water outlet the water temperature across the entire cross-section of the Danube shall not increase 30 degrees.
The nuclear power plant has always observed the existing limitations and will observe them in the future.