CN207352976U - The energy absorbing device of out-pile vapour explosion consequence after a kind of alleviation nuclear power plant major accident - Google Patents
The energy absorbing device of out-pile vapour explosion consequence after a kind of alleviation nuclear power plant major accident Download PDFInfo
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- CN207352976U CN207352976U CN201720738198.2U CN201720738198U CN207352976U CN 207352976 U CN207352976 U CN 207352976U CN 201720738198 U CN201720738198 U CN 201720738198U CN 207352976 U CN207352976 U CN 207352976U
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- vapour explosion
- nuclear power
- power plant
- major accident
- pile
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model discloses the energy absorbing device of out-pile vapour explosion consequence after a kind of alleviation nuclear power plant major accident, including the low density foam aluminium lamination as internal layer and the high-density foam aluminium lamination as outer layer；The shape of the outer layer matches with the geometry of reactor pit wall.The advantageous effects of the utility model are：On reactor pit wall, using tabular sandwich, foamed aluminium material sets the different foam constructed of aluminium of dual-layer density, can be in that class nature absorbs energy caused by vapour explosion, out-pile vapour explosion is impacted caused by containment structure after alleviating nuclear power plant's major accident, the shape of absorption plant is matched with reactor pit wall-shaped, the energy of vapour explosion generation can be quickly absorbed, effectively prevents a large amount of radioactivity releases for damaging and further resulting in due to containment structure caused by vapour explosion.
Description
Technical field
The utility model belongs to nuclear power station safety full protection field, and in particular to one kind alleviates nuclear power plant's severe safety accident
The energy absorbing device of out-pile vapour explosion consequence afterwards.
Background technology
After major accident occurs for nuclear power plant, the reactor core of melting can fall into lower head of pressure vessel, if without other alleviations
Measure, can cause pressure vessel burn through, and then reactor core fusant-concrete reaction occurs, and produce a large amount of non-condensable gas, and
It is likely to result in bottom plate burn through.
Majority generation Ⅲ nuclear power unit employs delay measure in melt pressure container at present, and the measure is in pressure
External container water filling, from exterior cooling pressure container, so as to ensure that pressure vessel is intact.But this measure still suffers from failure
Possibility, once failure, fusant can enter pressure vessel outside cooling water in, this can cause violent fusant-cooling
Agent is reacted, it is possible to produce strong vapour explosion phenomenon, i.e. out-pile vapour explosion phenomenon.Once generation vapour explosion, produces
Strong shock wave, huge impact is caused to the containment structure around reactor pressure vessel, it is possible to cause containment
Structural failure, causes containment to lose leakproofness, and then causes a large amount of radioactive substances can be discharged into environment.
In the prior art without the device for alleviating above-mentioned vapour explosion consequence.
Utility model content
For defect existing in the prior art, the utility model provides a kind of out-pile after alleviating nuclear power plant's major accident
The energy absorbing device of vapour explosion consequence, energy when which can at least partly absorb vapour explosion, alleviates because steaming
Enormous impact caused by containment structure around to reactor pressure vessel is fried in steam explosion.
To achieve the above objectives, the technical solution adopted in the utility model is：
The energy absorbing device of out-pile vapour explosion consequence after a kind of alleviation nuclear power plant major accident, including as internal layer
Low density foam aluminium lamination and high-density foam aluminium lamination as outer layer；The shape of the outer layer and reactor pit wall
Geometry matches.
Further, the above-mentioned energy absorbing device for alleviating out-pile vapour explosion consequence after nuclear power plant's major accident, institute
State on the inside of internal layer and be provided with outer shell on the outside of outer layer.
Further, the above-mentioned energy absorbing device for alleviating out-pile vapour explosion consequence after nuclear power plant's major accident, institute
State and fixed structure is provided with outer shell.
Further, the above-mentioned energy absorbing device for alleviating out-pile vapour explosion consequence after nuclear power plant's major accident, institute
The thickness for stating outer shell is 1-2mm.
Further, the above-mentioned energy absorbing device for alleviating out-pile vapour explosion consequence after nuclear power plant's major accident, institute
The porosity for stating low density foam aluminium lamination is 80%-95%, and the porosity of the high-density foam aluminium is not less than 60% and small
In 80%.
Further, the above-mentioned energy absorbing device for alleviating out-pile vapour explosion consequence after nuclear power plant's major accident, institute
The thickness for stating low density foam aluminium lamination is 5-10cm, and the high-density foam aluminium thickness is 5-10cm.
The advantageous effects of the utility model are：
On reactor pit wall, using tabular sandwich, foamed aluminium material sets dual-layer density different
Foam constructed of aluminium, can be in that class nature absorbs energy caused by vapour explosion, alleviate out-pile steam after nuclear power plant's major accident
Explosion impact, shape of absorption plant caused by containment structure are matched with reactor pit wall-shaped, can quickly inhaled
The energy that vapour explosion produces is received, effectively prevents what is damaged and further result in due to containment structure caused by vapour explosion
A large amount of radioactivity releases.
Brief description of the drawings
Fig. 1 is a kind of energy for alleviating out-pile vapour explosion consequence after nuclear power plant major accident of embodiment of the utility model
Measure the structure diagram of absorption plant.
Fig. 2 is the out-pile vapour explosion consequence after alleviating nuclear power plant's major accident of the utility model another kind embodiment
The structure diagram of energy absorbing device.
Fig. 3 is the cross-sectional view of the utility model absorption plant.
Fig. 4 is the compressive stress strain curve figure of typical froth metal structure.
In above-mentioned attached drawing：1st, internal layer；2nd, outer layer；3rd, outer shell；4th, fixing device.
Embodiment
Below in conjunction with the accompanying drawings, specific embodiment of the present utility model is described in further detail.
The main material ingredient of the energy absorbing device of the present invention is foamed aluminium.Foamed aluminium material is a kind of new
Functional material, has isotropism, is not easy the easy and good cushion energy absorbing property of burn into shaping.
Fig. 4 show the compressive stress strain curve of typical froth metal structure.Foamed aluminium as a kind of foam metal,
With unique stress-strain response characteristic, its response can be divided into three phases, i.e. stretch section, plastic yielding section and densification
The change stage.Online elastic deformation stage, stress and strain is in a linear relationship, and within this stage, compound foamed aluminum mainly leans on
The elastic deformation of matrix absorbs energy, and the energy absorbed only accounts for the very small part of its total energy-absorbing；When stress increases to
During the yield point of compound foamed aluminum, compound foamed aluminum is plastically deformed, and hereafter, is even basically unchanged in stress increase very little
In the case of, strain increase is very much, and compound foamed aluminum generates very big residual deformation, and within this stage, hollow ball is continuous
Extruding is until be crushed, and collide, rub with surrounding matrix, compound foamed aluminum absorbs largely within this stage
Energy, accounts for it and absorbs the major part of gross energy, is the Main Stage of energy-absorbing；Finally, when most of hollow ball is crushed brokenly
After bad, compound foamed aluminum enters densification stage, and stress increases with strain, this stage is mainly after hollow ball destroys
Fragment be further compressed, absorb part energy during cell space fragment is compressed.
The utility model utilizes the mechanical characteristic of foamed aluminium, there is provided out-pile steams after one kind alleviates nuclear power plant's major accident
Steam explosion fries the energy absorbing device of consequence as shown in figure 3, being installed on reactor pit wall, during for absorbing vapour explosion
The impact energy of generation.The utility model is tabular sandwich, including as the low density foam aluminium lamination of internal layer 1 and conduct
The high-density foam aluminium lamination of outer layer 2；The shape of the outer layer 2 matches (herein with the geometry of reactor pit wall
Coincideing, which includes outer layer shape, can only coincide the part of reactor pit).Present embodiment provides two kinds of different shapes
The energy absorbing device (tabular energy absorbing device as shown in Figure 1 and the cambered surface energy absorbing device shown in Fig. 2) of shape, peace
Mounted in the different zones of reactor pit wall.Using sandwich, foamed aluminium material sets the different foamed aluminium of dual-layer density
Structure, after the relatively low vapour explosion phenomenon of energy occurs, after shock wave arrives first at the present apparatus, can cause internal layer first
The plastic deformation of 1 low density foam aluminum so that the pressure peak of shock wave is absorbed by the present apparatus；When energy is higher
After vapour explosion phenomenon occurs, if low density foam aluminum is not enough to absorb all energy, the height of outer layer 2 can be caused
The plastic deformation of density foam aluminum, is further absorbed by high-density foam aluminium, finally makes vapour explosion to containment structure
Damage reach minimum.In this way, by height different densities foamed aluminium ectonexine coordinate, this energy absorbing device energy compared with
In the case of high vapour explosion, energy caused by vapour explosion is absorbed in class nature, alleviates out-pile after nuclear power plant's major accident
Vapour explosion is impacted caused by containment structure, and the shape of absorption plant is matched with reactor pit walls shape, can be fast
Speed absorbs the energy that vapour explosion produces, and effectively prevents since containment structure caused by vapour explosion damages and further leads
The a large amount of radioactivity releases caused.
Further, since foamed aluminium rough surface is easily stained, the pollution of environment in npp safety shell is caused, on
The energy absorbing device of out-pile vapour explosion consequence, the inner side of internal layer 1 and outer layer 2 after the alleviation nuclear power plant major accident stated
Outside is provided with outer shell 3；Beautiful and antifouling effect is played by outer shell 3, prevents that water in containment and foamed aluminium are straight
Contact, can also prevent the foam aluminium chips of breakage from entering containment.In the present embodiment, outer shell 3 is stainless steel casing, thick
Relatively thin (thickness 1-2mm, is preferably 1mm) is spent, does not interfere with the mechanical property of device entirety.
Further, the above-mentioned energy absorbing device for alleviating out-pile vapour explosion consequence after nuclear power plant's major accident, institute
State and fixed structure 4 is provided with outer shell 3 (fixed structure 4 in the present embodiment is to be arranged on that corner is used for and bolt coordinates
Mounting hole).The porosity of the low density foam aluminium lamination is 80%-95%, thickness 5-10cm；The high-density foam aluminium
Porosity be the thickness 5-10cm not less than 60% and less than 80%.
The energy absorbing device of the present embodiment is installed on outside reactor pressure vessel, using tabular sandwich, foam
Aluminum sets the different foam constructed of aluminium of dual-layer density, can be in that class nature absorbs energy caused by vapour explosion, alleviate
Out-pile vapour explosion is impacted caused by containment structure after nuclear power plant's major accident, the shape and safety container of absorption plant
Shell shape matches, and can quickly absorb the energy of vapour explosion generation, effectively prevent due to containment caused by vapour explosion
Structural damage and a large amount of radioactivity releases further resulted in.
Obviously, those skilled in the art can carry out the utility model various modification and variations without departing from this reality
With new spirit and scope.If will in this way, these modifications and variations of the utility model are belonged to the utility model right
Ask and its equivalent technology within the scope of, then the utility model be also intended to include these modification and variations including.
Claims (6)
1. the energy absorbing device of out-pile vapour explosion consequence after a kind of alleviation nuclear power plant major accident, it is characterised in that including
High-density foam aluminium lamination as the low density foam aluminium lamination of internal layer (1) and as outer layer (2)；The shape of the outer layer (2) with
The geometry of reactor pit wall matches.
2. alleviate the energy absorbing device of out-pile vapour explosion consequence after nuclear power plant's major accident as claimed in claim 1, its
It is characterized in that, outer shell (3) is provided with the inside of the internal layer (1) and on the outside of outer layer (2).
3. alleviate the energy absorbing device of out-pile vapour explosion consequence after nuclear power plant's major accident as claimed in claim 2, its
It is characterized in that, fixed structure is provided with the outer shell (3).
4. alleviate the energy absorbing device of out-pile vapour explosion consequence after nuclear power plant's major accident as claimed in claim 2, its
It is characterized in that, the thickness of the outer shell (3) is 1-2mm.
5. the energy absorption dress of out-pile vapour explosion consequence after the alleviation nuclear power plant major accident as described in claim 1-4 is any
Put, it is characterised in that the porosity of the low density foam aluminium lamination is 80%-95%, the porosity of the high-density foam aluminium
Not less than 60% and less than 80%.
6. the energy absorption dress of out-pile vapour explosion consequence after the alleviation nuclear power plant major accident as described in claim 1-4 is any
Put, it is characterised in that the thickness of the low density foam aluminium lamination is 5-10cm, and the high-density foam aluminium thickness is 5-10cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720738198.2U CN207352976U (en) | 2017-06-23 | 2017-06-23 | The energy absorbing device of out-pile vapour explosion consequence after a kind of alleviation nuclear power plant major accident |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720738198.2U CN207352976U (en) | 2017-06-23 | 2017-06-23 | The energy absorbing device of out-pile vapour explosion consequence after a kind of alleviation nuclear power plant major accident |
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| CN207352976U true CN207352976U (en) | 2018-05-11 |
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| CN201720738198.2U Active CN207352976U (en) | 2017-06-23 | 2017-06-23 | The energy absorbing device of out-pile vapour explosion consequence after a kind of alleviation nuclear power plant major accident |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110148479A (en) * | 2019-05-17 | 2019-08-20 | 张延林 | Nuclear power plant reactor explosion-protection equipment |
| CN111340346A (en) * | 2020-02-21 | 2020-06-26 | 中国核电工程有限公司 | Method for analyzing explosive risk of indoor combustible gas of nuclear power plant |
-
2017
- 2017-06-23 CN CN201720738198.2U patent/CN207352976U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110148479A (en) * | 2019-05-17 | 2019-08-20 | 张延林 | Nuclear power plant reactor explosion-protection equipment |
| CN111340346A (en) * | 2020-02-21 | 2020-06-26 | 中国核电工程有限公司 | Method for analyzing explosive risk of indoor combustible gas of nuclear power plant |
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