System for confining and cooling melt from the core of a water cooled-water modified reactor

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

Active Publication Date: 2017-09-26
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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  • System for confining and cooling melt from the core of a water cooled-water modified reactor
  • System for confining and cooling melt from the core of a water cooled-water modified reactor
  • System for confining and cooling melt from the core of a water cooled-water modified reactor

Examples

Experimental program
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Embodiment Construction

[0052] 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.

[0053] 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 non-metallic filler (12) between said metallic outer layer and said metallic inner layer. 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.

[0054] Furthermore, the core capture device vessel (8) is provided with a thermal protection layer (9) of the multilayer vessel flange.

[0055] The console (7) is located in the space between the cantilever truss (...

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PUM

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Abstract

The invention relates to the field of atomic energy, and specifically to systems which provide for the safety of nuclear power plants, and may be used in the event of serious accidents leading to the destruction of a reactor housing and of the hermetic containment structure of a nuclear power plant. A system for confining and cooling melt contains: a guide plate in the form of a funnel, installed under the bottom of a reactor housing; a cantilever truss, installed under the guide plate so that the plate rests on same; a melt catcher, installed under the cantilever truss and provided with a cooling casing in the form of a multi-layered vessel for protecting an outer heat-exchange wall against dynamic, thermal and chemical influences; and a filler for diluting the melt, located in said multi-layered vessel. Said multi-layered vessel contains a metal inner layer and a metal outer layer, between which is provided an intermediate layer in the form of a non-metal filler; wherein, reinforcing ribs are provided between the inner and outer layers, said ribs being installed with an azimuthal spacing (Spitch) which satisfies the condition: d<ext> / 15<(s<pitch>)<d<ext> / 5, where d<ext> is the outer diameter of the vessel. The technical result consists in increasing the effectiveness of removing heat from a melt and in increasing design 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
CPCG21C9/016G21C13/10G21C15/18G21C13/024Y02E30/30
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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