Flow stabilizing device, waste heat removal system and flow stabilizing method

Abstract

The invention discloses a flow stabilizing device, a waste heat removal system and a flow stabilizing method. The flow stabilizing device comprises a first pressure sensor, a second pressure sensor, a temperature sensor, a flow control valve and a controller; the first pressure sensor, the second pressure sensor, the temperature sensor and the flow control valve are all arranged on a reflux pipeline of condensed liquid; and the first pressure sensor, the second pressure sensor, the temperature sensor and the flow control valve are in communication connection with the controller. The flow control system composed of the first pressure sensor, the second pressure sensor, the temperature sensor, the flow control valve and the processor can automatically control the liquid level in the backflow pipeline of the condensed liquid, meanwhile, the flow control system is arranged in the waste heat removal system, the liquid level is kept near an outlet of the heat exchanger, impact of condensate water on a gas-liquid interface is avoided, the effect of eliminating condensate water flow fluctuation is achieved, and the effect of flow stabilization of the waste heat removal system is achieved.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant safety systems, in particular to a flow stabilization device, a waste heat discharge system and a flow stabilization method. Background technique [0002] When the reactor is shut down, the lower control rods will immediately stop the fission heat of the fuel rods, but the fission products in the core contain a large amount of radioactive elements that can decay, so that the core still generates a lot of decay heat after the reactor shuts down. In order to reduce the temperature and pressure of the reactor after shutdown, a waste heat removal system must be installed to continuously export the waste heat of the reactor. In the cooling process, the heat transfer power is low, and when the condensed water does not fill the return pipe, an obvious gas-liquid interface will appear on the return pipe, and the condensed water will flow down the return pipe to impact the gas-liquid interface,...

AI Technical Summary

Problems solved by technology

In the cooling process, the heat transfer power is low, and when the condensed water does not fill the return pipe, an obvious gas-liquid interface will appear on the return pipe, and the condensed water will flow down the return pipe to impact the gas-liquid interface, making the interface Fluctuations occur, so that the condensate flow fluctuates, and it is easy to cause a large load force on the pipeline, which makes the pipeline have the risk of rupture

When the temperature of the condensed water at the outlet of the condenser is uneven and fluctuates greatly, it is easy to cause a large thermal fatigue impact on the downstream pipeline, which also causes the pipeline to be at risk of rupture

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