Passive high-order emergency cooling water supply system for nuclear power plant
An emergency cooling and water supply system technology, applied in nuclear power generation, cooling devices, reactors, etc., can solve problems such as failure of active equipment, and achieve the effect of reducing the risk of core meltdown and large-scale radioactive release
Inactive Publication Date: 2015-03-25
中广核工程有限公司 +1
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But above-mentioned system mainly provides water source for each setting user 24 through emergency mobile diesel (gasoline) oil pump (fire engine) 26, because the fuel oil of emergency mobile diesel (gasoline) oil pump (fire engine) 26 can't satisfy the demand of running continuously for 72 hours , needs replenishment, so there is a problem of failure of active equipment; moreover, emergency mobile diesel (gasoline) oil pump (fire truck) 26 and emergency water supply pipelines need to be laid temporarily after the accident, and there is a problem of accessibility after the accident
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[0022] In order to make the purpose, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.
[0023] Due to the emergency water source configuration, available water volume and supply means of the existing PWR nuclear power unit, it is difficult to meet the requirements of SBO superimposed LUHS super-design basis accident conditions, which has brought great harm to the safety and economy of nuclear power plants. Therefore, the present invention adds a passive high-level emergency cooling water source system to the nuclear power plant as the emergency water source system after a serious accident, which is used to deal with accidents within 7...
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The invention discloses a passive high-order emergency cooling water supply system for a nuclear power plant. The passive high-order emergency cooling water supply system comprises a high-order water storage container, a water supplementing pipeline and a water supply pipeline; the high-order water storage container is arranged at a high-terrain position close to a nuclear island user or is supported by a building, and stores emergency cooling water; the water supplementing pipeline communicates an external water source with the high-order water storage container so as to supplement water for the high-order water storage container under a normal condition; one end of the water supply pipeline is connected to the bottom of the high-order water storage container, and the other end of the water supply pipeline is connected to preset users, so that the water supply pipeline can provide emergency water for the users by utilizing gravitational potential energy under a design basis exceeding working condition. According to the passive high-order emergency cooling water supply system for the nuclear power plant, the high-order water storage container stores the emergency cooling water, when the nuclear power plant generates a design basis exceeding accident, emergency water can be supplied to the preset nuclear island users by utilizing the gravitational potential energy without intervention from an active device, and therefore, the risks of reactor core meltdown and large-scale radioactivity release generated after nuclear power accidents are effectively reduced.
Description
technical field [0001] The invention belongs to the field of nuclear power safety. More specifically, the invention relates to a passive high-level emergency cooling water supply system of a nuclear power plant that is not restricted by an external power source. Background technique [0002] In the event of extreme natural disasters, it is possible to cause SBO (Station Black Out, plant blackout accident) and LUHS (Loss of Ultimate Heat Sink, loss of ultimate heat sink) accident conditions in nuclear power plants. The safety and economy of the plant will bring great harm. For example, in 2011, the 9-magnitude earthquake and its secondary disasters in the Northeast Sea of Japan caused the Fukushima Daiichi Nuclear Power Plant to suffer a loss of power supply and final heat sink for more than a week, thus making the reactor core, exhaust The fuel pool could not be cooled stably and continuously for a long time, which eventually led to fuel damage, hydrogen explosion, and th...
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Login to View More IPC IPC(8): G21C15/18
CPCG21C15/18Y02E30/30
Inventor 陈蜀志宫爱成
Owner 中广核工程有限公司