A device for studying the influence of natural circulation resistance of containment passive heat removal system
A technology of natural circulation and heat removal system, applied in cooling devices, nuclear power generation, reduction of greenhouse gases, etc., to achieve the effect of reducing workload and high accuracy
Active Publication Date: 2019-11-22
CNNC FUJIAN FUQING NUCLEAR POWER
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Problems solved by technology
[0003] The purpose of the present invention is to provide a device for studying the influence of the natural circulation resistance of the containment passive heat removal system, so as to solve the problem of repeatedly introducing resistance in the research on the resistance characteristics of the natural circulation loop of the experimental device of the containment passive heat removal system of China Nuclear Hualong No. 1 demand, and studied the natural circulation characteristics of the loop with the change of the equivalent resistance coefficient, providing a reference for the decision-making of the system under abnormal operating conditions after the completion of the power station
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[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0019] Such as figure 1 Shown is the structure diagram of the device for studying the influence of the natural circulation resistance of the containment passive heat removal system. The electric boiler 1 is connected to the containment simulation body 2 through the upper steam pipeline 6 and the lower steam pipeline 7 respectively, the outlet of the electric boiler 1 is provided with a flow meter 5, the heat exchanger 3 is placed in the containment simulation body 2, and the heat exchanger 3 Both ends are connected to the bottom of the cooling water tank 4 through the natural circulation ascending section 8 and the natural circulation descending section 9. The natural circulation ascending section 8 is provided with an ascending section isolation valve 10, an ascending section flowmeter 11 and an ascending section pressure differential gauge ...
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Belonging to the field of containment passive heat removal technologies, the invention particularly relates to a device for studying the influence of containment passive heat removal system natural circulation resistance. The high temperature and high pressure water vapor produced by an electric boiler enters a containment simulator through an upper vapor pipeline and a lower vapor pipeline to heat a heat exchanger therein, the boiling temperature of liquid in the heat exchanger pipeline rises and the liquid enters a cooling water tank through a natural circulation ascending section, the liquid in the cooling water tank declines and flows through the heat exchanger through a natural circulation descending section, thus forming natural circulation flow, and taking away the heat in the containment simulator continuously, lowering the pressure of the containment simulator, and ensuring the safety of the containment simulator. The opening degrees of a natural circulation ascending sectionisolation valve and a natural circulation descending section isolation valve are controlled remotely to increase the resistance of a natural circulation loop. The device provided by the invention canprovide reference for decision making under abnormal operating conditions after completion of a power station.
Description
technical field [0001] The invention belongs to the technical field of nuclear power plant containment passive heat removal, and in particular relates to a device for studying the influence of natural circulation resistance of a containment passive heat removal system. Background technique [0002] The filter installed at the downcomer of the containment passive heat export system of CNNC Hualong No. 1 may be clogged, the valve may be stuck and cannot be fully opened, and the heat exchanger or system piping may be fouled. The occurrence of these situations will affect the natural circulation capacity of the system. produce adverse effects. In the research on the resistance characteristics of the natural circulation circuit of the experimental device of the passive heat export system of the Hualong No. 1 containment of China National Nuclear Corporation, to study the influence degree and change law of the resistance change of the natural circulation circuit on the natural cir...
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IPC IPC(8): G21C15/18G21C17/00
CPCG21C15/18G21C17/00Y02E30/30
Inventor薛峻峰吴其方刘洪印祝圆李泽军孟兆明周剑丁铭张楠孙中宁王志强张明兴郑静黄晓景郝禄禄仇苏辰
OwnerCNNC FUJIAN FUQING NUCLEAR POWER