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Apparatus for positioning and cooling lining layer of damaged LWR nuclear reactor

A technology for reactors and linings, applied in the fields of reactors, nuclear engineering, nuclear power generation, etc., can solve the problems of destroying melts, lack of guiding devices for melting linings, and inability to ensure the effective flow of melts, etc.

Inactive Publication Date: 2005-02-23
V·B·哈本斯基 +17
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] - The system cannot ensure efficient flow of melt into the core trap because it lacks a guide for the molten liner that cannot be damaged by the high temperature of the molten liner and cannot accumulate solidified melt

Method used

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  • Apparatus for positioning and cooling lining layer of damaged LWR nuclear reactor
  • Apparatus for positioning and cooling lining layer of damaged LWR nuclear reactor
  • Apparatus for positioning and cooling lining layer of damaged LWR nuclear reactor

Examples

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Embodiment Construction

[0062] refer to figure 1 , the system includes a nuclear reactor 1 located in a concrete well 2 . The sub-compartment of the concrete well houses the core catcher 3 and inside the cooled jacket 4 is a steel basket 5 containing a mass of diluent sacrificial material 6 enclosed in a steel shell 7 . The cooled jacket comprises side walls 8 and a bottom 9 . Between the reactor and the core catcher there is a guide 10 whose walls are covered with refractory concrete 11 and whose surface has a coating of meltable concrete 12 .

[0063] The working principle of the system is given below. The process begins with the shell of the reactor 1 melting through and the molten lining flowing into the sub-compartments of the concrete well 2 . To guide the melt flow, below the reactor is a guide 10 , which is, for example, funnel-shaped. In order to protect the bearing portion of the guide, its surface is covered with refractory concrete 11 . In order to prevent the molten lining from soli...

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Abstract

The invention relates to apparatus for positioning and cooling melting lining layer when the melting lining layer flows out of the reactor shell during accident. The improvements of invention are described as following: the design of the cooling lining layer trap which has steel basket shell and arranged in sub-reactor, wherein sacrifice material is filled in the steel basket for diluting the component containing uranium and steel component of the lining layer; the shape (arrangement) of the sacrifice material in reactor core; the choice for optimum number of the sacrifice material; installation of guiding device used for the lining layer flowing into the reactor core trap. Especially, the thickness of bottom of the cooling jacket is larger than the thickness of the side wall thereof for no less than 30%, and the cooling jacket inclines to its center for 10 to 20 degree; the diluent and sacrifice material is made into blocks packed in steel shell.

Description

technical field [0001] The present invention relates generally to the field of atomic energy engineering and more particularly to nuclear power plant (NPP) safety systems, i.e. the positioning and cooling of molten corium when it is released outside the reactor vessel during an accident . Background technique [0002] The development of atomic energy engineering needs to ensure the overall safety of NPP. In order to meet this requirement, a multi-level safety system with several back-up safety functions is emphasized. The highest radiation hazard is an accident involving a complete meltdown of the core, which can be caused by multiple failures of the core cooling system. When such an accident occurs, the corium, that is, the molten core, melts the in-vessel structure and the reactor vessel, and flows to the outside, which can lead to the prevention of radioactivity due to the residual heat. Damage to the last barrier of material leakage into the environment - the NPP cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C9/016
CPCY02E30/40Y02E30/30
Inventor V·B·哈本斯基V·S·格拉诺夫斯基S·V·贝什塔A·S·西多罗夫G·E·诺先科G·I·克莱米约诺夫E·D·谢尔盖耶夫V·A·季霍米罗夫V·V·彼得罗夫O·N·扎米亚金A·K·涅切夫S·V·奥努夫里恩科I·V·库赫特维金V·V·别兹列普金V·V·古萨罗夫V·M·别尔科维金M·L·克洛尼特斯基I·I·科佩托夫
Owner V·B·哈本斯基
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