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Device combining in-core and out-of-core dwelling of molten material of large-scale passive nuclear power plant

A passive, nuclear power plant technology, applied in nuclear power generation, emergency protection devices, reactors, etc., can solve problems such as failure, release of radioactive substances, etc.

Inactive Publication Date: 2014-02-12
SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
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Problems solved by technology

Therefore, the IVR also has the risk of failure. After the IVR fails, the core melt will be released from the pressure vessel to the reactor cavity. If there is a large amount of water in the reactor cavity, a steam explosion will occur, and the interaction between the core melt and concrete will also be It is very likely that a large amount of radioactive substances will be released into the environment

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  • Device combining in-core and out-of-core dwelling of molten material of large-scale passive nuclear power plant

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0013] The technical solution of the present invention is a device that combines the inside and outside of the pile of molten material in a large passive nuclear power plant, such as figure 1 As shown, it includes concrete sacrificial layer 4, core trap chamber 7, core trap refractory layer 8, cooling channel inlet 9, cooling channel outlet 10 and core trap bottom cooling channel 11; wherein, The bottom of the reactor cavity 6 is provided with a concrete sacrificial layer 4, the thickness of which is between 0.2m-4m, and the lower part of the concrete sacrificial layer 4 is provided with a sealed core catcher chamber 7, and the core catcher is made of refractory material , preferably magnesia or zirconia, a pot-shaped core catcher refractory layer 8 is arranged at the lower part of the core catcher chamber 7, and a circular stack is arranged on the lowe...

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Abstract

The invention provides a device combining in-core and out-of-core dwelling of a molten material of a large-scale passive nuclear power plant. The device comprises a concrete sacrificial layer (4), a core catcher chamber (7), a core catcher refractory layer (8), a cooling channel inlet (9), a cooling channel outlet (10) and a core catcher bottom cooling channel (11). The invention provides a set of device organically combining molten material out-of-core cooling with an IVR (interactive voice response) system, when IVR succeeds, in-core dwelling of the molten material can be realized; and after the IVR fails, out-of-core dwelling of the molten material is realized by passive cooling of the core catcher bottom cooling channel, and the capability of mitigating severe accidents of the large-scale passive pressurized water reactor nuclear power plant is further enhanced.

Description

technical field [0001] The invention relates to the technical field of large-scale passive pressurized water reactors, in particular to a device for combining the retention of molten matter in the reactor and outside the reactor in a large-scale passive nuclear power plant. Background technique [0002] The use of the core trap technology can make the molten material from the pressure vessel effectively stay in a certain device, and the interaction between the core molten material and the concrete can be effectively prevented by adopting the corresponding external cooling technology of the molten material, thereby Reduce the risk of melting through the bottom of the containment vessel, significantly reduce the release of fission products to the environment, and greatly reduce the radioactive consequences of severe accidents. [0003] In the design of the existing large passive PWR nuclear power plant, the technology of in-vessel retention of molten material is adopted to ens...

Claims

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Application Information

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IPC IPC(8): G21C9/016
CPCY02E30/40Y02E30/30
Inventor 刘鑫黄高峰方立凯曹克美张琨王佳赟
Owner SHANGHAI NUCLEAR ENG RES & DESIGN INST CO LTD
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