[en] Results of numerical hydrothermal simulation of the thermal regimes in the design of the external cooling systems of the Akkuyu nuclear power plant (Turkey) and the Kudan Kulam nuclear power plant (India), both of which are situated on the sea coast, are set forth. The STREAM 3D software package for calculation of the three-dimensional fields of stratified flows and temperatures in a hydrostatic approximation are used in the investigations. Different ways of optimizing the thermal regimes and configurations of coastal hydraulic structures by means of which the temperature in the water intakes of a nuclear power plant and in the adjacent body of water may be reduced to levels that satisfy the regulatory requirements are proposed.

[en] The results of numerical hydrothermal modeling of the temperature regimes pf the cooling ponds of the Rostov NPP and fifth unit of the Novovoronezh NPP are presented. The STREAM-3D software package is used in the study to calculate the three-dimensional fields of stratified flows and temperatures in a hydrostatic approximation. Variants of optimizing the thermal regimes that reduce the temperature at the NPP external cooling water intake system are proposed.