Author(s): R. Rajar; A. Sirca; M. Krzyk; A. Vidmar; M. Cetina
Linked Author(s):
Keywords: 3D modelling; Velocity measurements; Model calibration; Thermal pollution
Abstract: Cooling water for the Nuclear Power Plant Krsko (NPPK) is provided from the Sava River. In the next years, a dam with a HEPP will be constructed 7 km downstream and the water level will be raised for 3 m. Numerical simulations of the flow, sedimentation and thermal pollution had to be made for the future conditions. Detailed 3D measurements of the flow in the present situation were made by a floating ADCP instrument and compared with the results of some versions of the 3D model. In greatest part of the river section a good agreement is obtained. However, near the intake to the inflow channel an underwater wall is directing the flow which is complex, the vertical velocity components locally attaining over 20 % of the horizontal components. Here the difference between the simulated and measured velocity vectors is hardly acceptable. The same model has also been supplemented for the simulation of thermal pollution, where agreement with the measurements is very good. Some cases of simulations of thermal conditions in the whole reservoir are also presented for present and future conditions.
Year: 2011