Nuclear power plant passive pulse cooling method and system

Abstract

The invention discloses a passive pulse cooling method and system for a nuclear power plant. The method is executed in the event of an accident of losing all water supply or an accident of losing all water supply in a superimposed power loss of the whole plant. The method includes: an evaporator isolation step, an evaporator Function separation step, cooling evaporator pressure relief step, deaerator primary pressurization step, opening water supply pipeline step, deaerator secondary pressurization step, the present invention can be used in the event of loss of all water supply accident or superimposed loss of power loss in the whole plant. In the event of all water supply accidents, the functions of multiple evaporators in the nuclear power plant are separated into two parts, the power evaporator and the cooling evaporator. The pressure difference between the high-pressure steam in the nuclear steam supply system and the cooling evaporator is used as water injection power, and the steam The high-pressure steam of the pipeline and the power evaporator pressurizes the deaerator, opens the atmospheric discharge valve of the cooling evaporator to reduce the pressure, and uses the pressure difference to passively inject the water in the deaerator into the cooling evaporator to realize the Water injection for steam generators.

Description

technical field [0001] The invention relates to the field of nuclear power, in particular to a passive pulse cooling method and system for a nuclear power plant. Background technique [0002] After the nuclear reactor shuts down, it is necessary to continue to cool the core to take away the decay heat to avoid the uncontrolled release of radioactive materials caused by the melting of the core. The reliability of the system related to waste heat removal is directly related to the control of the accident unit. [0003] The 2011 Fukushima nuclear accident in Japan was a nuclear power plant that lost all power and water sources due to an earthquake and tsunami, and the core lost its forced cooling method. The residual heat of the fuel could not be exported, causing the core to melt and radioactive substances to be released into the environment. ACCIDENT. Similar to the extreme accident that occurred in the Fukushima Nuclear Power Plant, the “full plant power outage (SBO) super...

AI Technical Summary

Problems solved by technology

[0006] (3) The on-duty personnel of the power plant cannot effectively control the unit and need external assistance, but it takes a certain amount of time for various foreign aids to be in place (ranging from 15 minutes to several hours);

[0007] (4) It takes a certain amount of time (more than 3 hours) to access the external rescue equipment;

However, it is difficult to apply this design to the second-generation nuclear power unit, and the transformation is difficult and the cost is high

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