CN208570126U - A kind of integral structure that nuclear fuel element is nested with the cooling heat pipe of circuit parallel type - Google Patents
A kind of integral structure that nuclear fuel element is nested with the cooling heat pipe of circuit parallel type Download PDFInfo
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- CN208570126U CN208570126U CN201820919577.6U CN201820919577U CN208570126U CN 208570126 U CN208570126 U CN 208570126U CN 201820919577 U CN201820919577 U CN 201820919577U CN 208570126 U CN208570126 U CN 208570126U
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- China
- Prior art keywords
- heat pipe
- nuclear fuel
- fuel element
- cooling heat
- parallel type
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
Abstract
The utility model discloses the integral structure that a kind of nuclear fuel element is nested with the cooling heat pipe of circuit parallel type, the rectangular parallelepiped structure or bottom surface that are square including the cooling heat pipe of circuit parallel type, bottom surface are the nuclear fuel element of the hexagonal prisms structure of regular hexagon；Parallel type cooling heat pipe in circuit is connected by two straight pipes and two U-shaped elbows, the evaporator section of two straight pipes is respectively placed in the core bore in the middle part of two adjacent nuclear fuel elements, the central steam area of cooling heat pipe successively includes evaporator section, adiabatic section, condensation segment from bottom to top in the axial direction, and the length of evaporator section and the length of nuclear fuel element are consistent；It is fuel pellet inside nuclear fuel element, outside is involucrum, and the tube wall of the cooling heat pipe in center is integrated with the involucrum design on the inside of nuclear fuel element centre bore.Overall structure is simple, compact layout, highly-safe, good heat-transfer, adaptability are good, especially suitable for nuclear reactor for space and other small-sized nuclear reactors.
Description
Technical field
The utility model relates to nuclear energy power generation technical fields, and in particular to a kind of nuclear fuel element and circuit parallel type are cooling
The integral structure of heat pipe nesting.
Background technique
With the mature expansion with space probation application demand of the continuous development of space probation technology, the mankind put sight
The celestial body far from the earth even remotely from the solar system has been arrived, and has been ground it is desirable that building space base on celestial body and carrying out relevant science
Study carefully.Future other celestial body surfaces (such as moon, Mars) carry out space base construction, will have very great science,
Military and political value.The construction of space base is faced with complicated, severe space environment, the energy stablize supply and management at
The important leverage operated normally for space base.Sun-generated electric power and chemical energy power supply are because of the inherent shortcoming of itself, Wu Fake
The influence of some factors of clothes such as day-night change, fuel reserves makes its application on space base by great limitation.It is empty
Between nuclear reactor power supply is not affected by environment, power is big, the service life is long, safe and reliable, energy supply sustainability is strong, therefore recognized
To be ideal reliable energy supply scheme in space base and other deep space exploration tasks.
Since nuclear reactor for space has many irreplaceable advantages in space base and other deep space exploration tasks,
The states such as the U.S., Russia, Japan, France have carried out many in-depth studies to nuclear reactor for space, and propose tens of kinds of skies
Between nuclear reactor scheme, the type of cooling includes gas cooling, liquid metal is cooling, heat pipe is cooling etc..Due to space base ring
The complexity in border, passive cooling technology is the first choice of nuclear reactor for space, and heat pipe cooling technology is with high heat conductance, height
The passive cooling technology of the advantages that transient feedback performance, high reliability, low-maintenance demand, therefore nuclear reactor for space is set at present
Meter is mostly cooling using heat pipe.
In existing space nuclear reactor designs, single cooling heat pipe is disposed in fuel element, in reactor core radial direction cloth
It sets, existing arrangement some will lead between fuel element and heat pipe that there are gaps, and cause filling fuels rate lower, and
After gap between fuel element and heat pipe is filled by structural material, lead to nuclear reactor critical mass and the total matter of reactor core
The increase of amount；Some meetings propose very high requirement to the reliability of single heat pipe, once there is a heat pipe failure, at the heat pipe
Heat caused by nuclear fuel element is difficult to be taken away by the heat pipe of surrounding, may result in the damage of nuclear fuel element.
Utility model content
The purpose of this utility model is in view of the deficiencies of the prior art, to provide a kind of highly-safe, good reliability, layout
The compact nuclear fuel element integral structure nested with the cooling heat pipe of circuit parallel type.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of nuclear fuel element integral structure nested with the cooling heat pipe of circuit parallel type, including nuclear fuel element and cold
But heat pipe, cooling heat pipe are placed in nuclear fuel element center, and the both ends of the cooling heat pipe at two adjacent nuclear fuel element centers
It is connected using U-shaped elbow, is formed into a loop parallel type.
Further, the cooling heat pipe is followed successively by central steam area, porous wick structure, liquid ring cavity and pipe from inside to outside
Wall, wherein the inside involucrum of tube wall and nuclear fuel element design are integrated.
Further, the porosity of the porous wick structure is 0.5 to 0.7.
Further, the central steam area of the cooling heat pipe successively include from bottom to top in the axial direction evaporator section,
Adiabatic section and condensation segment, and the evaporator section bottom in two neighboring cooling heat pipe central steam area is connected using the U-shaped elbow of evaporator section,
Using the U-shaped elbow connection of condensation segment at the top of condensation segment.
Further, the inside of the nuclear fuel element is fuel pellet, and outside is involucrum, the evaporation of the cooling heat pipe
Segment length is consistent with the height of nuclear fuel element.
Further, there are 0.1 to 0.3mm gaps between the fuel pellet and the involucrum.
Further, it is regular hexagon that the nuclear fuel element, which is rectangular parallelepiped structure or bottom surface that bottom surface is square,
Hexagonal prisms structure.
The utility model compared with prior art, is had the following advantages and beneficial effects:
1, a kind of nuclear fuel element provided by the utility model integral structure nested with the cooling heat pipe of circuit parallel type,
Due to using the parallel heat pipe of loop-type, in bringing-up section or unbalanced condensation segment heat flow density, the working fluid inside pipe exists
Channel interior generates integral form circulation, and the steam pressure that the big side of evaporator section heat flow density generates is larger, push steam to
The low side of the small pressure of heat flow density, entire loop be finally reached a self-excitation balance state, the parallel heat pipe structure of loop-type,
Exchange capability of heat, highly-safe, good reliability can be automatically adjusted in a big way.
2, the nuclear fuel element provided by the utility model integral structure nested with the cooling heat pipe of circuit parallel type will return
Parallel type cooling heat pipe in road is nested together with nuclear fuel element, and the nuclear fuel element is the cuboid knot that bottom surface is square
Structure or bottom surface are the hexagonal prisms structure of regular hexagon, can in reactor core close arrangement, to improve nuclear fuel filling rate,
Reduce heap core volume, reduces critical mass, this safety of structure height, good reliability, compact layout, especially suitable for space core
Reactor and other small-sized nuclear reactors.
Detailed description of the invention
Fig. 1 is the diameter of the utility model embodiment nuclear fuel element integral structure nested with the cooling heat pipe of circuit parallel type
To cross section structure schematic diagram.
Fig. 2 is the axis of the utility model embodiment nuclear fuel element integral structure nested with the cooling heat pipe of circuit parallel type
To cross section structure schematic diagram.
Fig. 3 (a) is the utility model embodiment nuclear fuel element integral structure nested with the cooling heat pipe of circuit parallel type
Radial section arrangement schematic diagram applied to reactor core；Fig. 3 (b) is the utility model embodiment nuclear fuel element and circuit
The cooling heat pipe nesting integral structure of parallel type is applied to the axial cross section arrangement schematic diagram of reactor core.
Fig. 4 is that single cooling heat pipe is disposed in the structural schematic diagram in fuel element in the prior art.
Fig. 5 is that single cooling heat pipe is disposed in the radially arrangement signal of one of fuel element reactor core in the prior art
Figure.
Fig. 6 is that single cooling heat pipe is disposed in the radially arrangement signal of another reactor core in fuel element in the prior art
Figure.
Wherein, 1- fuel pellet, 2- involucrum, 3- liquid ring cavity, 4- porous wick structure, 5- evaporator section, the adiabatic section 6-, 7- are cold
Solidifying section, the U-shaped elbow of 8- evaporator section, the U-shaped elbow of 9- condensation segment, 10- nuclear fuel element, the cooling heat pipe of 11-.
Specific embodiment
The present invention will be further described in detail with reference to the embodiments and the accompanying drawings, but the implementation of the utility model
Mode is without being limited thereto.
Embodiment:
The present embodiment is for being applied to nuclear reactor for space Core Design, the design longevity of nuclear fuel element and cooling heat pipe
Order consistent with core life, no replacement is required in core life, provides a kind of nuclear fuel element and circuit parallel type is cooling warm
Radial section and the axial cross section difference of the integral structure of pipe nesting, the structure are as depicted in figs. 1 and 2, including nuclear fuel
Element (10) and cooling heat pipe (11), cooling heat pipe (11) are placed in nuclear fuel element (10) center, and two adjacent nuclear fuels
The both ends of the cooling heat pipe (11) at element (10) center are connected using U-shaped elbow, parallel type are formed into a loop, compared to shown in Fig. 4
Cooling heat pipe single in the prior art be disposed in the structure in fuel element, the parallel heat pipe structure of loop-type can be larger
Exchange capability of heat, highly-safe, good reliability are automatically adjusted in range.
Wherein, the cooling heat pipe (11) is followed successively by central steam area, porous wick structure (4), liquid ring cavity from inside to outside
(3) and tube wall, wherein the design of the inside involucrum of tube wall and nuclear fuel element (10) is integrated, the hole of the porous wick structure (4)
Gap rate is 0.5 to 0.7.
Specifically, the central steam area of the cooling heat pipe (11) successively includes in the axial direction evaporator section from bottom to top
(5), adiabatic section (6) and condensation segment (7), and the evaporator section bottom in two neighboring cooling heat pipe (11) central steam area is using evaporation
U-shaped elbow (8) connection of section, condensation segment top is connected using the U-shaped elbow of condensation segment (9).
The inside of the nuclear fuel element (10) is fuel pellet (1), and outside is involucrum (2), the cooling heat pipe (11)
Evaporator section (5) length it is consistent with the height of nuclear fuel element (10), stayed between the fuel pellet (1) and the involucrum (2)
There is 0.1 to 0.3mm gap.The evaporator section (5) in cooling heat pipe (11) central steam area absorbs the heat that fuel pellet (1) generates
Heat, after adiabatic section (6), is driven in condensation segment (7) and gives other working medias by amount, fuel pellet (1) and involucrum (2) it
Between gap, to accommodate pellet expansion and storage fission gas.
Specifically, the nuclear fuel element (10) is rectangular parallelepiped structure that bottom surface is square or bottom surface is positive six sides
The hexagonal prisms structure of shape.
The present embodiment is applied to shown in schematic diagram such as Fig. 3 (a) and Fig. 3 (b) of nuclear reactor for space Core Design, compared to
Fig. 5 and reactor core layout type shown in fig. 6 in the prior art, entire reactor core compact layout, can in reactor core close arrangement, from
And nuclear fuel filling rate is improved, reduce heap core volume, reduces critical mass.Cooling heat pipe is placed in nuclear fuel element center, and phase
The both ends of the cooling heat pipe at two adjacent fuel element centers are connected using U-shaped elbow, are formed into a loop parallel type, can be larger
Exchange capability of heat is automatically adjusted in range, can effectively avoid the problem that being caused because of single heat pipe failure, high reliablity.
The above, only the utility model patent preferred embodiment, but the protection scope of the utility model patent is simultaneously
Not limited to this, anyone skilled in the art is in the range disclosed in the utility model patent, according to this
The technical solution of utility model patent and its inventive concept are subject to equivalent substitution or change, belong to the guarantor of the utility model patent
Protect range.
Claims (7)
1. a kind of nuclear fuel element integral structure nested with the cooling heat pipe of circuit parallel type, it is characterised in that: fired including core
Expect that element and cooling heat pipe, cooling heat pipe are placed in nuclear fuel element center, and the cooling at two adjacent nuclear fuel element centers
The both ends of heat pipe are connected using U-shaped elbow, are formed into a loop parallel type.
2. a kind of nuclear fuel element according to claim 1 integral structure nested with the cooling heat pipe of circuit parallel type,
It is characterized by: the cooling heat pipe is followed successively by central steam area, porous wick structure, liquid ring cavity and tube wall from inside to outside,
The design of the inside involucrum of middle tube wall and nuclear fuel element is integrated.
3. a kind of nuclear fuel element according to claim 2 integral structure nested with the cooling heat pipe of circuit parallel type,
It is characterized by: the porosity of the porous wick structure is 0.5 to 0.7.
4. a kind of nuclear fuel element according to claim 2 integral structure nested with the cooling heat pipe of circuit parallel type,
It is characterized by: the central steam area of the cooling heat pipe successively includes evaporator section, adiabatic section from bottom to top in the axial direction
And condensation segment, and the evaporator section bottom in two neighboring cooling heat pipe central steam area is using the U-shaped elbow connection of evaporator section, condensation segment
Top is using the U-shaped elbow connection of condensation segment.
5. a kind of nuclear fuel element according to claim 4 integral structure nested with the cooling heat pipe of circuit parallel type,
It is characterized by: the inside of the nuclear fuel element is fuel pellet, outside is involucrum, the evaporation segment length of the cooling heat pipe
It is consistent with the height of nuclear fuel element.
6. a kind of nuclear fuel element according to claim 5 integral structure nested with the cooling heat pipe of circuit parallel type,
It is characterized by: there are 0.1 to 0.3mm gaps between the fuel pellet and the involucrum.
7. a kind of nuclear fuel element according to any one of claims 1 to 6 one nested with the cooling heat pipe of circuit parallel type
Change structure, it is characterised in that: the nuclear fuel element is the rectangular parallelepiped structure that bottom surface is square or bottom surface is regular hexagon
Hexagonal prisms structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820919577.6U CN208570126U (en) | 2018-06-14 | 2018-06-14 | A kind of integral structure that nuclear fuel element is nested with the cooling heat pipe of circuit parallel type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820919577.6U CN208570126U (en) | 2018-06-14 | 2018-06-14 | A kind of integral structure that nuclear fuel element is nested with the cooling heat pipe of circuit parallel type |
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| Publication Number | Publication Date |
|---|---|
| CN208570126U true CN208570126U (en) | 2019-03-01 |
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| CN201820919577.6U Expired - Fee Related CN208570126U (en) | 2018-06-14 | 2018-06-14 | A kind of integral structure that nuclear fuel element is nested with the cooling heat pipe of circuit parallel type |
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| CN (1) | CN208570126U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511092A (en) * | 2018-06-14 | 2018-09-07 | 华南理工大学 | A kind of integral structure that nuclear fuel element is nested with circuit parallel type cooling heat pipe |
-
2018
- 2018-06-14 CN CN201820919577.6U patent/CN208570126U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511092A (en) * | 2018-06-14 | 2018-09-07 | 华南理工大学 | A kind of integral structure that nuclear fuel element is nested with circuit parallel type cooling heat pipe |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190301 Termination date: 20190614 |