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<p>This work presented numerical modeling of the thermal impact on the Irtysh River, which flows in the East Kazakhstan region, near which a nuclear power plant is located. A certain area of the Irtysh River, located on the territory of the Republic of Kazakhstan near the city of Kurchatov, is considered as a cooling reservoir. To get as close to reality as possible, a full three-dimensional model was considered, which is established on the incompressible Navier–Stokes equation and the temperature transfer equations, taking into account buoyancy forces, a real coastal contour with a real topography of the river bottom. Minimizing the hydrothermal impact of warm wastewater from power plants on natural reservoirs was carried out using two drainage pipes. From the obtained data, it can be noticed that the use of two spillway pipes to release heated water shows a more efficient temperature propagation along the river flow than from the release of water with a single-pipe discharge. Based on the numerical results of the study, in which two lateral discharges are used, an analysis is made of the optimal location of the pipes relative to the cooling tank, taking into account the different velocities of the discharged water. It can also be concluded that the obtained numerical solutions downstream differ little from each other in depth, and in the future, to optimize the design work, it is better to use a combined model in 2D and 3D. So it is desirable to use a 3D model near spillways, while further downstream use a 2D model.</p>

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Assessment of the formation of thermal pollution zones in a flowing water environment from the coastal power plant: a numerical study

  • 期刊论文

  • 发表日期：

    2026年7月6日

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  • Alibek Issakhov,
  • Arda Mustafa,
  • Aizhan Abylkassymova,
  • Assylbek Issakhov

摘要

This work presented numerical modeling of the thermal impact on the Irtysh River, which flows in the East Kazakhstan region, near which a nuclear power plant is located. A certain area of the Irtysh River, located on the territory of the Republic of Kazakhstan near the city of Kurchatov, is considered as a cooling reservoir. To get as close to reality as possible, a full three-dimensional model was considered, which is established on the incompressible Navier–Stokes equation and the temperature transfer equations, taking into account buoyancy forces, a real coastal contour with a real topography of the river bottom. Minimizing the hydrothermal impact of warm wastewater from power plants on natural reservoirs was carried out using two drainage pipes. From the obtained data, it can be noticed that the use of two spillway pipes to release heated water shows a more efficient temperature propagation along the river flow than from the release of water with a single-pipe discharge. Based on the numerical results of the study, in which two lateral discharges are used, an analysis is made of the optimal location of the pipes relative to the cooling tank, taking into account the different velocities of the discharged water. It can also be concluded that the obtained numerical solutions downstream differ little from each other in depth, and in the future, to optimize the design work, it is better to use a combined model in 2D and 3D. So it is desirable to use a 3D model near spillways, while further downstream use a 2D model.