System and method for improving natural circulation capability of nuclear power system by using core waste heat

A technology of core waste heat and natural circulation, which is applied in the directions of machinery/engine, steam engine, mechanical equipment, etc., can solve the problem that the weak driving force of the natural circulation system has not been fundamentally solved, and achieves reduction of equipment occupation area and large expansion. The effect of sex, flexible use

Active Publication Date: 2020-09-08
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Some design improvement measures can indeed improve the system's flow, heat transfer, and maximum allowable power performance to a certain extent. However, the problem of weak driving force in the natural circulation system has not been fundamentally resolved.

Method used

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  • System and method for improving natural circulation capability of nuclear power system by using core waste heat

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in detail:

[0020] Such as figure 1 As shown, the present invention is a system for improving the natural circulation capability of a nuclear power system by using the waste heat of the core. The system is constructed based on the waste heat of the core in the nuclear power system as a heat source. 2. The performance enhancer module 3, the heat sink module 4 and related pipelines and instruments are composed; the thermoelectric power generation circuit module 2 mainly includes a first heat exchanger 201, a separator 202, a pressure relief valve 203, a steam turbine 204, a power generation machine 205, absorber 206, condenser 207, small electric pump 208, ammonia liquid storage tank 209, ammonia pump 210, first regenerator 211 and second regenerator 212; the performance booster module 3 mainly includes the electric pump 301 and check valve 302; the heat sink module...

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Abstract

The invention discloses a system and method for improving natural circulation capability of a nuclear power system by utilizing reactor core waste heat. According to the system, based on a thought that waste heat (reactor core fuel waste heat, spent fuel waste heat and the like) is brought away by utilizing natural circulation in the nuclear power system, on the basis of weak drive force and low power conversion efficiency of an original natural circulation system, an external energy source is not introduced; excess heat of a heat source is recovered by using a designed thermoelectric power generation loop module and electric energy is generated; and then, an electric pump in a loop is driven by the generated electric energy to further drive fluid in the loop to flow, and therefore, the natural circulation capability of the system is greatly enhanced. Operation of the system depends on the own energy of the natural circulation system, and on the premise that the passive characteristicof the natural circulation system is not changed, cooling capability of the natural circulation system is improved.

Description

technical field [0001] The invention relates to the technical field of natural circulation capability research in a nuclear power system, in particular to a system and method for improving the natural circulation capability of a nuclear power system by utilizing waste heat from a reactor core. Background technique [0002] The natural circulation system does not require external energy, and can transfer the heat energy of the heat source to the heat sink by relying on its own gravity difference. Because of this feature, natural circulation systems are used to remove waste heat from the core in the event of loss of off-site power after an accident. However, a major drawback of the natural circulatory system is the weak driving force. A weak driving force will lead to low heat transfer capability, system design constraints and functional failure. In the event of an accident, the waste heat of the core, such as the decay heat in the spent fuel pool, is far from enough to rely...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01K25/10F01K27/00
CPCF01K25/106F01K27/00
Inventor 田文喜刘强苏光辉秋穗正陈荣华
Owner XI AN JIAOTONG UNIV
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