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Confinement and cooling of melt from the core of a nuclear reactor

A core melt, nuclear reactor technology, applied in the field of nuclear power, to achieve the effect of improving efficiency and improving structural reliability

Active Publication Date: 2017-10-13
原子能设计股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] This is why applying granular ceramic backfill without a strong thermally conductive connection to the outer wall of the heat exchanger is ineffective

Method used

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  • Confinement and cooling of melt from the core of a nuclear reactor
  • Confinement and cooling of melt from the core of a nuclear reactor
  • Confinement and cooling of melt from the core of a nuclear reactor

Examples

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Embodiment Construction

[0049]According to the claimed invention, a conical deflector (4) supported by a cantilever truss (5) with a thermal shield (6) is installed at the bottom of the reactor vessel (1) in a concrete dome (3) ( 2) Below. Below the cantilever truss (5) there is a core capture device (8) with a cooling cladding (vessel) in the form of a multi-layered vessel, comprising an outer metal layer (11) and an inner metal layer ( 13) (wall) having a filler (12) with good thermal conductivity between said outer metal layer and said inner metal layer.

[0050] Inside the core capture device (8) there is a sacrificial filler material (10) applied to dilute the core melt. In addition, the packing (11) is equipped with stepped conical or cylindrical pockets (14) for containing the core melt.

[0051] Furthermore, the core capture device vessel (8) is provided with a thermal protection layer (9) of the multilayer vessel flange.

[0052] The console (7) is located in the space between the cantile...

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Abstract

The invention relates to nuclear power industry, namely to systems providing safety of nuclear power plants (NPP), and can be used during severe accidents leading to reactor vessel and NPP containment failure. The melt cooling and confinement system includes a cone-shaped guide plate installed under the reactor vessel bottom, cantilever girder installed under the guide plate and supporting the same, core catcher installed under the cantilever girder and equipped with cooled cladding in form of a multi-layer vessel for protection of the external heat-exchange wall from dynamic, thermal and chemical impacts, and filler material for melt dilution inside the multi-layer vessel. The said multi-layer vessel has external and internal metal walls with a filler that is highly heat-conductive in relation to wall material in between, where filler material thickness hfil meets the following criterion: 1.2hext< hfil <2.4hext, where hext is vessel external wall thickness. The technical result of the invention is the increased efficiency of heat removal from the melt and improved structural reliability

Description

technical field [0001] The present invention relates to the nuclear power industry, ie to systems providing safety in nuclear power plants (NPP), and can be used during severe accidents causing failure of the reactor vessel and its containment. Background technique [0002] Core meltdown / meltdown accidents that occur under multiple failures of the core cooling system constitute the most serious radiation hazard. [0003] During these accidents, core melt, core melt (corium), melt of the reactor internals and its vessels flow out of the reactor (pressure) vessel and can affect the integrity of the NPP containment due to its residual heat, The NPP containment is the last barrier on the release path of radioactive products to the environment. [0004] To prevent this, the released core melt should be sealed / enclosed and cooled continuously until it is completely condensed / crystallized. The reactor core melt (core melt) cooling and containment system fulfills this function, pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C9/016G21C13/10
CPCG21C9/016G21C13/024G21C13/10G21C15/18Y02E30/30
Inventor A·B·尼多莱佐夫A·S·西多罗夫
Owner 原子能设计股份公司
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