Power plant water intake open channel layout analysis method based on reduction of water intake entrainment effect

Abstract

The invention relates to a power plant water intake open channel layout analysis method based on reduction of a water intake entrainment effect. The method comprises the following steps: constructing a three-dimensional mathematical model of a water intake open channel of a nuclear power plant; analyzing internal and external flow fields of the water taking open channel; constructing a water taking open channel organism and sundry throwing simulation mathematical model; analyzing the water taking entrainment rate of organisms and sundries in the water taking open channel; and comprehensively analyzing the water taking entrainment rates of the water taking open channels with different structures. Aiming at a water taking open channel structure of a nuclear power plant, according to environmental characteristics such as water area flow velocity, flow direction, terrain and shoreline of a water taking project, flow field characteristics inside and outside the water taking open channel structure are fully utilized, the entrainment effect of water taking on organisms and sundries is analyzed, and the water taking safety is improved. According to the method, the internal and external flow field distribution characteristics and the water taking entrainment rate of the water taking open channel in the water taking engineering water area are provided, and a basis is provided for reducing the water taking entrainment influence of the open channel.

Description

technical field [0001] The present invention relates to an analysis method for laying out open channels for water intake in power plants based on reducing the water intake effect, which is an analysis method for hydraulic calculation and design, and an analysis method for open channels for reducing the rate of water intake in power plants. An open channel design analysis method that makes full use of the structure of the water intake channel to create characteristic hydrodynamic conditions to reduce the flow of organisms and debris into the water intake system. Background technique [0002] It is a key element for the safe operation of nuclear power plants to obtain cooling water for nuclear reactors and important equipment through the water intake system. Once the water intake system is blocked, the unit may be forced to reduce power or shut down the reactor. In severe cases, it may even cause nuclear safety accidents, resulting in irreparable Loss. [0003] As the environ...

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Problems solved by technology

At present, the design of open water intake channels mainly considers the prevention of sedimentation, etc., without considering the impact of aquatic organisms or debris on water intake, and there is no specification or theoretical guidance based on reducing the water intake rate of organisms and debris in the layout of open water intake channels, and The design is seldom combined with the hydrodynamic conditions of the water area of ​​the water intake project and the hydrodynamic characteristics inside and outside the open channel, and it is impossible to minimize the entry of aquatic organisms into the water intake system from the perspective of hydrodynamics

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