CN107170500A - A kind of nuclear fuel storage system containing double-deck neutron poison - Google Patents
A kind of nuclear fuel storage system containing double-deck neutron poison Download PDFInfo
- Publication number
- CN107170500A CN107170500A CN201710238450.8A CN201710238450A CN107170500A CN 107170500 A CN107170500 A CN 107170500A CN 201710238450 A CN201710238450 A CN 201710238450A CN 107170500 A CN107170500 A CN 107170500A
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- Prior art keywords
- nuclear fuel
- fuel storage
- neutron poison
- storage system
- deck
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Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
- G21C19/06—Magazines for holding fuel elements or control elements
- G21C19/07—Storage racks; Storage pools
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/40—Arrangements for preventing occurrence of critical conditions, e.g. during storage
-
- 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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention belongs to nuclear safety control technology field, it is related to a kind of nuclear fuel storage system containing double-deck neutron poison.Described nuclear fuel storage system includes the fuel assembly deposited in multiple nuclear fuel storage units, double-deck neutron poison, moderation of neutrons medium, fuel assembly storage area and fuel assembly storage area, each nuclear fuel storage unit forms in inner space, inner space by the encirclement of outer wall and sets double-deck neutron poison；The cross section of every layer of neutron poison is L-shaped, and the two ends of l-shaped cross section are intersected with the outer wall of described each nuclear fuel storage unit；The outer wall that one layer of neutron poison in the moderation of neutrons medium described in being filled in certain space, described space, each nuclear fuel storage unit in the inner part and the nuclear fuel storage unit are formed between double-deck neutron poison surrounds to form described fuel assembly storage area.Using the nuclear fuel storage system of the present invention, the economy and security of nuclear fuel assembly storage can be improved, increases storage capability.
Description
Technical field
The invention belongs to nuclear safety control technology field, it is related to a kind of nuclear fuel storage system containing double-deck neutron poison.
Background technology
With the progressively operation of China's nuclear power generating sets, the quantity of irradiated fuel assembly is also being doubled and redoubled.China's nuclear fuel is followed
Ring policy is that spentnuclear fuel is post-processed, and spentnuclear fuel is accomplished by transporting to rear in nuclear power station after the short of stocking and storing water pond
Treatment plant or intermediate storage facilities, to carry out spentnuclear fuel post processing from now on.With the increase of China's nuclear power installation total capacity, need
The irradiated fuel assembly quantity to be stored will be significantly increased.Current variant type irradiated fuel store facility is according to satisfaction substantially
Nuclear power plant's storage capacity of 10 years to 20 years is designed, and the projected life of unit is usually even up to 60 years 40 years.
It is substantial amounts of weary in the case that the construction the built time of China's reprocessing plant and the reprocessing rate after building up are not met by requirement
Fuel assembly will face long-term intermediate storage, therefore improve the storage capability of irradiated fuel assembly in economy in limited factory site
Property and security in terms of propose requirement.
The mode that irradiated fuel store carries out criticality safety control from early stage without using neutron poison is stored, to current
Widely used use certain forms and the neutron poison of arrangement carry out criticality safety control and reach the target of intensive storage, respectively
State has put into substantial amounts of research and practice to the Curve guide impeller of irradiated fuel store.
The content of the invention
The purpose of the present invention is that the control requirement for storing criticality safety in pond for spent nuclear fuel in nuclear power plant contains there is provided one kind
The nuclear fuel storage system of double-deck neutron poison, to improve the economy and security of nuclear fuel assembly storage.
In order to achieve this, in the embodiment on basis, the present invention provides a kind of nuclear fuel containing double-deck neutron poison
Storage system, described nuclear fuel storage system is included in 10-1000, preferably 700-900 nuclear fuel storage unit, bilayer
The fuel assembly deposited in sub- poisonous substance, moderation of neutrons medium, fuel assembly storage area and fuel assembly storage area,
Each nuclear fuel storage unit is formed in inner space, inner space by the encirclement of outer wall sets double-deck neutron poison
Thing；The cross section of every layer of neutron poison is L-shaped, and the two ends of l-shaped cross section and described each nuclear fuel storage unit
Outer wall intersects；Formed between double-deck neutron poison and described moderation of neutrons medium filled in certain space, described space,
The outer wall of one layer of neutron poison and the nuclear fuel storage unit in each nuclear fuel storage unit in the inner part is surrounded
Form described fuel assembly storage area.
In a preferred embodiment, the present invention provides a kind of nuclear fuel storage system containing double-deck neutron poison,
Wherein described neutron poison be the material containing larger neutron absorption cross-section nucleic, the nucleic be selected from boron, gadolinium, cadmium, silver and/or
Hafnium.
In a preferred embodiment, the present invention provides a kind of nuclear fuel storage system containing double-deck neutron poison,
The gross thickness of wherein described neutron poison is 2.5-5mm.
In a preferred embodiment, the present invention provides a kind of nuclear fuel storage system containing double-deck neutron poison,
The height of double-deck neutron poison in wherein each nuclear fuel storage unit is covered in the nuclear fuel storage unit in described combustion
The height for the fuel assembly active section deposited in material component storage area.
In a preferred embodiment, the present invention provides a kind of nuclear fuel storage system containing double-deck neutron poison,
Wherein described moderation of neutrons medium is light-water or boracic light-water.
In a preferred embodiment, the present invention provides a kind of nuclear fuel storage system containing double-deck neutron poison,
The material of the outer wall of wherein described fuel storing unit is with certain degree of hardness, corrosion resistant structural material.
In a preferred embodiment, the present invention provides a kind of nuclear fuel storage system containing double-deck neutron poison,
The material of the outer wall of wherein described fuel storing unit is various stainless steels or titanium alloy.
In a preferred embodiment, the present invention provides a kind of nuclear fuel storage system containing double-deck neutron poison,
The width in wherein described space is 2-30mm.
In a preferred embodiment, the present invention provides a kind of nuclear fuel storage system containing double-deck neutron poison,
Wherein described fuel assembly includes fuel rod, guide pipe, gauge pipe.
The beneficial effects of the present invention are, can be with using the nuclear fuel storage system containing double-deck neutron poison of the present invention
The economy and security of nuclear fuel assembly storage are improved, increases storage capability.The present invention is before criticality safety control is met
Putting makes the control object i.e. distance of fuel assembly of criticality safety closer to increasing the neutron-absorbing effect of neutron poison, subtract
Pitch between small fuel storing unit, increases the storage capability of Spent fuel pit or container.
The present invention sets double-deck neutron poison in Spent Fuel Pool fuel storing unit, increases the neutron of neutron poison
Sink effect, can make the arrangement of fuel assembly even closer under conditions of criticality safety is met, and the structure can be effectively sharp
With space, the purpose for the bunkering ability for improving pond is reached.The structure is equally applicable to load the container of fuel assembly.Adopt
After technical scheme, according to the type of selected neutron poison, fuel storage system can be fired by adjusting
Expect the distance of storage unit, the arrangement of neutron poison realizes the criticality safety for ensureing system in normal and conceivable accident operating mode.
Brief description of the drawings
Fig. 1 is a nuclear fuel storage list in the exemplary nuclear fuel storage system of the invention containing double-deck neutron poison
The cross-sectional view of member.
Fig. 2 in the nuclear fuel storage system of the neutron poison containing individual layer of contrastive nuclear fuel storage unit it is transversal
Face figure.
Fig. 3 is that the loading of fuel assembly in the exemplary nuclear fuel storage system of the invention containing double-deck neutron poison is bent
Line.
Embodiment
The embodiment of the present invention is further illustrated below in conjunction with accompanying drawing.
1st, the nuclear fuel storage system containing double-deck neutron poison of the invention
The exemplary nuclear fuel storage system of the invention containing double-deck neutron poison can be applied to the spentnuclear fuel of nuclear power station
In pond, the cross section of one of nuclear fuel storage unit is as shown in figure 1, including nuclear fuel storage unit outer wall 1, outer layer
Neutron poison 2, internal layer neutron poison 3, space 4, fuel assembly storage area 5, fuel assembly 6.
Nuclear fuel storage unit outer wall 1 (material is stainless steel), which surrounds to be formed in inner space, inner space, sets outer layer
Neutron poison 2 and internal layer neutron poison 3 (neutron poison is boron steel).The cross section of outer layer neutron poison 2 and internal layer neutron poison 3
It is L-shaped, thickness is respectively 1mm and 1.5mm, and the two ends of l-shaped cross section are intersected with nuclear fuel storage unit outer wall 1.Outer layer
Neutron poison 2 is attached with internal layer neutron poison 3 with bunkering screen work by fastening connection piece.Outer layer neutron poison 2
Filling moderation of neutrons medium in the space 4 that width is 15mm, space 4 (being specially light-water) is formed between internal layer neutron poison 3.
Internal layer neutron poison 3 is surrounded with nuclear fuel storage unit outer wall 1 and forms fuel assembly storage area 5, and fuel assembly is deposited
Put storage fuel assembly 6 in area 5.Square fuel assembly 6 is arranged using 17 × 17, wherein containing 264 fuel rods, 24 are led
To pipe and 1 gauge pipe.Fuel rod in component is made up of fuel pellet in Zr alloy cladding pipes, fills certain in fuel rod
The helium of pressure.Fuel assembly fuel rod active section is highly 386.71cm, fuel rod pitch 1.26cm.According to as shown in Figure 3
Loading curve, initial enrichment and the average burn-up corresponding point of fuel assembly can be stored in weary combustion when being located above curve
Expect in pond.
The height of outer layer neutron poison 2 and internal layer neutron poison 3 is higher than the fuel assembly deposited in fuel assembly storage area 5
6 height.
On the basis of the as above structure of each nuclear fuel storage unit, between two adjacent nuclear fuel storage units in
Heart square is 24.5cm.
2nd, the nuclear fuel storage system of the neutron poison containing individual layer of contrastive
The cross section of a nuclear fuel storage unit is such as in the nuclear fuel storage system of the neutron poison containing individual layer of contrastive
Shown in Fig. 2, including nuclear fuel storage unit outer wall 1, neutron poison 2, fuel assembly storage area 3, fuel assembly 4.
Nuclear fuel storage unit outer wall 1 (material is stainless steel), which surrounds to be formed in inner space, inner space, sets individual layer
Neutron poison 2 (neutron poison is boron steel), thickness is 2.5mm.The two ends of the l-shaped cross section of individual layer neutron poison 2 and nuclear fuel
Storage unit outer wall 1 intersects.Neutron poison 2 is attached with bunkering screen work by fastening connection piece.
Neutron poison 2 surrounds with nuclear fuel storage unit outer wall 1 and forms fuel assembly storage area 3, fuel assembly storage area 3
Middle storage fuel assembly 4.Square fuel assembly 3 is arranged using 17 × 17, wherein containing 264 fuel rods, 24 guide pipes
With 1 gauge pipe.Fuel rod in component is made up of fuel pellet in Zr alloy cladding pipes, and certain pressure is filled in fuel rod
Helium.Fuel assembly fuel rod active section is highly 386.71cm, fuel rod pitch 1.26cm.According to dress as shown in Figure 3
Curve is carried, initial enrichment and the average burn-up corresponding point of fuel assembly can be stored in spentnuclear fuel water when being located above curve
Chi Zhong.
The height of neutron poison 2 is higher than the height for the fuel assembly 4 deposited in fuel assembly storage area 3.
On the basis of the as above structure of each nuclear fuel storage unit, between two adjacent nuclear fuel storage units in
Heart square is 25.5cm.
3rd, Contrast on effect
The bar of criticality safety can met using design of the design compared to individual layer neutron poison of double-deck neutron poison
Under part, make the volume centre-to-centre spacing between irradiated fuel store unit smaller, increase the storage capability of Spent Fuel Pool.As described above,
The nuclear fuel storage system of the neutron poison containing individual layer meets criticality safety condition for guarantee needs the pitch between adjacent storage unit
At least 25.5cm, according to the nuclear fuel storage system containing double-deck neutron poison then under the same conditions adjacent storage unit it
Between pitch be at least 24.5cm, effectively reduce the pitch between storage unit, increase storage capability.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations to the present invention belong to the model of the claims in the present invention and its equivalent technology
Within enclosing, then the present invention is also intended to comprising including these changes and modification.Above-described embodiment or embodiment are simply to the present invention
For example, the present invention can also be implemented with other ad hoc fashions or other particular form, without departing from the present invention's
Main idea or substantive characteristics.Therefore, it is regarded as from the point of view of the embodiment of description is in terms of any illustrative and non-limiting.This
The scope of invention should be illustrated that any change equivalent with the intention and scope of claim should also be included by appended claims
Within the scope of the invention.
Claims (9)
1. a kind of nuclear fuel storage system containing double-deck neutron poison, it is characterised in that：Described nuclear fuel storage system is included
Multiple nuclear fuel storage units, double-deck neutron poison, moderation of neutrons medium, fuel assembly storage area and fuel assembly storage
The fuel assembly deposited in area,
Each nuclear fuel storage unit forms in inner space, inner space by the encirclement of outer wall and sets double-deck neutron poison；
The cross section of every layer of neutron poison is L-shaped, and the two ends of l-shaped cross section and the outer wall of described each nuclear fuel storage unit
It is intersecting；Formed between double-deck neutron poison and described moderation of neutrons medium filled in certain space, described space,
The outer wall of one layer of neutron poison and the nuclear fuel storage unit in each nuclear fuel storage unit in the inner part surrounds to be formed
Described fuel assembly storage area.
2. nuclear fuel storage system according to claim 1, it is characterised in that：Described neutron poison is containing larger neutron
The material of absorption cross-section nucleic, the nucleic is selected from boron, gadolinium, cadmium, silver and/or hafnium.
3. nuclear fuel storage system according to claim 1, it is characterised in that：The gross thickness of described neutron poison is
2.5-5mm。
4. nuclear fuel storage system according to claim 1, it is characterised in that：Bilayer in each nuclear fuel storage unit
The height of neutron poison covers the fuel assembly deposited in the nuclear fuel storage unit in described fuel assembly storage area and lived
Property section height.
5. nuclear fuel storage system according to claim 1, it is characterised in that：Described moderation of neutrons medium be light-water or
Boracic light-water.
6. nuclear fuel storage system according to claim 1, it is characterised in that：The outer wall of described fuel storing unit
Material is with certain degree of hardness, corrosion resistant structural material.
7. nuclear fuel storage system according to claim 6, it is characterised in that：The material of the outer wall of the fuel storing unit
Matter is various stainless steels or titanium alloy.
8. nuclear fuel storage system according to claim 1, it is characterised in that：The width in described space is 2-30mm.
9. nuclear fuel storage system according to claim 1, it is characterised in that：Described fuel assembly comprising fuel rod,
Guide pipe, gauge pipe.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201029 | 2017-03-30 | ||
| CN201710201029X | 2017-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107170500A true CN107170500A (en) | 2017-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710238450.8A Pending CN107170500A (en) | 2017-03-30 | 2017-04-13 | A kind of nuclear fuel storage system containing double-deck neutron poison |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113571216A (en) * | 2021-06-15 | 2021-10-29 | 上海核工程研究设计院有限公司 | Netted sandwich structure storage cavity for dense spent fuel storage and storage grillwork thereof |
| CN113571217A (en) * | 2021-06-15 | 2021-10-29 | 上海核工程研究设计院有限公司 | Hollow water gap structure storage cavity for dense spent fuel storage and storage grillwork thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113571216A (en) * | 2021-06-15 | 2021-10-29 | 上海核工程研究设计院有限公司 | Netted sandwich structure storage cavity for dense spent fuel storage and storage grillwork thereof |
| CN113571217A (en) * | 2021-06-15 | 2021-10-29 | 上海核工程研究设计院有限公司 | Hollow water gap structure storage cavity for dense spent fuel storage and storage grillwork thereof |
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Application publication date: 20170915 |