Auxiliary water supply tank stored water circulation cooling system

A water circulation cooling and water supply tank technology, applied in cooling devices, reactors, reducing greenhouse gases, etc., can solve the problems of overheating of water tanks, hidden dangers of safe operation of nuclear power plants, etc., and achieve the effect of improving safety and economy.

Inactive Publication Date: 2014-06-18
NUCLEAR POWER INSTITUTE OF CHINA
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AI Technical Summary

Problems solved by technology

[0004] If the make-up water temperature from the conventional island condensate extraction system or the conventional island desalinated water system exceeds the standard, or the water temperature of the auxiliary feed water tank is already relatively high before performing the cycle deaeration, it is very likely that the auxiliary feed water tank is performing the make-up operation or cycle deaeration. During work, the water temperature exceeded the temperature limit of 50°C, causing the unit to withdraw to shutdown, which caused hidden dangers to the safe operation of the nuclear power plant.
If the power plant site is located in an area with high summer temperatures, there is a greater risk of tank overheating

Method used

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  • Auxiliary water supply tank stored water circulation cooling system

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Embodiment Construction

[0011] The present invention is described in detail below in conjunction with accompanying drawing and embodiment:

[0012] A circulating cooling system for stored water in an auxiliary feed water tank, which utilizes the circulation deaeration pump of the auxiliary feed water system to cool the stored water in the auxiliary feed water tank and send it back to the auxiliary feed water tank after being cooled by a heat exchanger, and gradually lowers the temperature of the stored water after circulation.

[0013] An auxiliary water tank storage water circulation cooling system, which includes a circulation pump 2 connected to the auxiliary water tank 1 through pipelines, the other end of the circulation pump 2 is connected to one end of the heat exchanger 3, and the other end of the heat exchanger 3 is connected to the auxiliary Connect to water tank 1. The heat exchanger 3 is also connected to an external source 4 .

[0014] The key parts that the present invention applies ar...

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Abstract

The present invention belongs to a pressurized water reactor nuclear power plant subsystem, and specifically relates to an auxiliary water supply tank stored water circulation cooling system, which comprises a circulation pump connected with an auxiliary water supply tank, wherein the other end of the circulation pump is connected with one end of a heat exchanger, the other end of the heat exchanger is connected with the auxiliary water supply tank, and the heat exchanger is connected with an external source. The auxiliary water supply tank stored water circulation cooling system has the following advantages that: the stored water in the auxiliary water supply tank can be cooled after the high water temperature alarm is generated during the water supply operation of the auxiliary water supply tank or during the circulation oxygen removing process, such that the condition that the water temperature is further increased to achieve the high temperature limitation value so as to cause unit recession can be prevented so as to increase safety and economy of the nuclear power plant.

Description

technical field [0001] The invention belongs to a sub-system of a pressurized water reactor nuclear power plant, in particular to a circulating cooling system for storing water in an auxiliary feedwater tank. Background technique [0002] The auxiliary water supply system is a special safety facility for PWR nuclear power plants. When an accident occurs in any normal water supply system, the auxiliary water supply system will operate to discharge the waste heat from the core until the reactor coolant system reaches the state where the waste heat removal system can be put into operation. [0003] The auxiliary water supply system is equipped with an auxiliary water supply tank. According to the existing design, the design temperature of the auxiliary water supply tank of the auxiliary water supply system is 7~50℃. When the water level of the auxiliary feed water tank is low, it will be replenished directly through the conventional island condensate pumping system or the conv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C15/18
CPCY02E30/40Y02E30/30
Inventor 黄伟任云曾畅
Owner NUCLEAR POWER INSTITUTE OF CHINA
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