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Water-cooling containment simulation device

A simulation device and containment technology, which is applied in the field of water-cooled containment simulation devices, can solve the problems of no containment wall cooling, enhanced containment steam condensation, and the containment model cannot simulate the passive containment cooling system well, etc. Achieve good cooling effect

Active Publication Date: 2016-05-04
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the passive containment cooling system can reduce the temperature of the steel containment, the relatively lower temperature of the containment forms a cold wall, which enhances the temperature gradient between the inner surface of the containment and the gas space, and at the same time enhances the steam condensation in the containment, which affects the The thermophoretic and diffusive deposition of aerosols, which in turn affects the deposition of aerosols in the containment
[0006] However, due to the limitations of the research content, in the current research on the aerosol migration behavior in the containment carried out internationally, the passive containment cooling system of the third generation nuclear power plant has not been studied and analyzed, and the designed containment model cannot Better simulation of the passive containment cooling system of the third generation large advanced pressurized water reactor AP1000
[0007] The traditional containment model mainly takes the second-generation PWR containment as the research object, and most of the tests do not have the function of containment wall cooling or this function is not mentioned in the literature, so the third-generation large-scale advanced PWR The study of stack AP1000 requires the design of a new containment model to simulate the passive containment cooling system

Method used

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Embodiment 1

[0032] Like the water-cooled containment simulation device described above, this embodiment differs from it in that a vacuum connection 12 is provided on the top of the upper head 1, and the vacuum connection 12 is externally connected to a vacuum pump to evacuate the inside of the casing. Since this test uses different gases as carriers to bring simulated aerosol particles into the inner space of the housing, different gases include nitrogen, helium, argon, etc., in order to determine the influence of different carriers on the distribution of aerosol particles, Before the aerosol is input, it is necessary to vacuumize the inside of the housing to minimize the influence of air content on the test results. Vacuumize before the start of the test, and the aerosol will not be ventilated until the vacuum degree meets the requirements.

Embodiment 2

[0034] Like the water-cooled containment simulation device described above, the difference of this embodiment is that the bottom of the lower head 3 is provided with a steam inlet connecting pipe 31, and a steam generator (not shown in the figure) passes through the steam inlet connecting pipe 31 It is connected with the casing, and the generated steam with specific parameters is passed into the casing, simulating the water vapor environment in the safety casing after the main circuit coolant boils under the reactor accident condition.

Embodiment 3

[0036] Like the water-cooled containment simulation device described above, the present embodiment differs from it in that the top of the upper head 1 is provided with a hygrometer connecting pipe 14, and a hygrometer passes through the hygrometer (not shown in the figure) connecting pipe 14 and The housing is connected to measure the humidity of the air and water vapor mixture in the inner space of the housing.

[0037] The hygrometer connects the sampling line and installs the relative humidity probe in the connection pipe 14 of the hygrometer. The aerosol diffusion swimming test is to study the diffusion mechanism of the aerosol in a steam environment, so it is necessary to pass water vapor to the inside of the housing before the aerosol is ventilated. The function of the hygrometer is to measure the humidity of the air and water vapor mixture in the inner space of the housing, and the aerosol is introduced after the humidity meets the test requirements.

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Abstract

The invention provides a water-cooling containment simulation device, which comprises a containment body, wherein the containment body comprises an upper seal head, a cylinder body and a lower seal head, the upper seal head, the cylinder body and the lower seal head are sequentially combined to form a sealed space inside the containment body; a water jacket body end plate is arranged on the cylinder body and fixes a water jacket body outside the cylinder body; a cooling water inlet pipe and a cooling water outlet pipe are arranged on the water jacket body, so that cooling water flows into and out of the water jacket body. Therefore, the cooling water flows into and out of the water jacket body to take away heat produced in the containment body, thus the water cooling effect of the reactor containment is simulated.

Description

technical field [0001] The invention relates to the field of containment model technology, in particular to a water-cooled containment simulation device. Background technique [0002] The containment model is a model device for better simulation of the containment of nuclear power plants. [0003] Usually, in the case of severe accidents in nuclear power plants, radioactive substances are released in the form of gases, vapors, and aerosols. Among them, aerosols are solid or liquid particles suspended in the gas, and are the main carrier for the release of radioactive substances. The process of their diffusion, distribution and deposition in space has received great attention in the field of severe accident safety of reactors. [0004] In the second-generation PWR containment, dry-sealed containment is generally used. The containment vessel is made of reinforced concrete, and a containment spray system is specially set up, which can reduce the pressure and temperature insid...

Claims

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Application Information

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IPC IPC(8): G21C17/00
CPCG21C17/001Y02E30/30
Inventor 刁均辉季松涛魏严凇高永光张爱民陈林林孙雪霆史宝磊史晓磊何晓军张培升
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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