CN204760042U - Nuclear reactor fuel assembly - Google Patents
Nuclear reactor fuel assembly Download PDFInfo
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- CN204760042U CN204760042U CN201520452879.3U CN201520452879U CN204760042U CN 204760042 U CN204760042 U CN 204760042U CN 201520452879 U CN201520452879 U CN 201520452879U CN 204760042 U CN204760042 U CN 204760042U
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- guide pipe
- fuel assembly
- nuclear reactor
- guide
- breeze way
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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 a nuclear reactor fuel assembly, it includes the first direction nest of tubes and the second direction nest of tubes at least. This first direction nest of tubes includes a plurality of first stand pipes, and this second direction nest of tubes includes a plurality of second stand pipes. This first stand pipe is different with second stand pipe structure or size to this first stand pipe and second stand pipe are the rule and arrange in turn. In the technical scheme provide by the utility model, the structure or the size of the stand pipe of this nuclear reactor fuel assembly inside are different for nuclear power station personnel accessible is rationally selected and is arranged when two kind at least stand pipes come the whereabouts of regulating controlling rod assembly the impact to fuel assembly, thereby carries out the accurate control of comparison to the impact force parameter.
Description
Technical field
The utility model relates to nuclear industry field, especially a kind of fuel assembly for nuclear reactor.
Background technology
Guide pipe is the main structural components of fuel assembly, and it provides insertion passage for control rod and neutron source rod.Usually in a fuel assembly, be provided with many guide pipes, and the structure of all guide pipes and size are identical in same fuel assembly.Such arrangement is unfavorable for that adjustment C&P systems is to the impulsive force of fuel assembly, and such arrangement is also unfavorable for adjusting the rigidity of fuel assembly and taking into account the assignment of traffic of fuel assembly inside.
Utility model content
The technical problems to be solved in the utility model is, provides a kind of fuel assembly for nuclear reactor of improvement.
The utility model solves the technical scheme that its technical matters adopts: construct a kind of fuel assembly for nuclear reactor, at least comprise the first guide pipe group and the second guide pipe group; Described first guide pipe group comprises some first guide pipes; Described second guide pipe group comprises some second guide pipes; Described first guide pipe is different with the second guide pipe structure or size, and the alternately arrangement in rule of described first guide pipe and the second guide pipe.
In fuel assembly for nuclear reactor of the present utility model, described first guide pipe comprises the first breeze way, and described second guide pipe comprises the second breeze way; The height of described first breeze way is greater than or less than the height of described second breeze way.
In fuel assembly for nuclear reactor of the present utility model, described first guide pipe comprises the large footpath section and path section that are connected by described first breeze way; Described second guide pipe comprises the outer segment and interior pipeline section that are connected by described second breeze way; And the external diameter of described interior pipeline section is less than the internal diameter of described outer segment;
The internal diameter of the path section of described first guide pipe is greater than or less than the internal diameter of the interior pipeline section of described second guide pipe.
In fuel assembly for nuclear reactor of the present utility model, the external diameter of the large footpath section of described first guide pipe is greater than or less than the external diameter of the outer segment of described second guide pipe.
In fuel assembly for nuclear reactor of the present utility model, it is peripheral and in equidistant spaced apart that described first guide pipe is positioned at described fuel assembly; And in the interval of the first guide pipe described in adjacent two, be furnished with described second guide pipe of equal number.
In fuel assembly for nuclear reactor of the present utility model, the inwall of described first guide pipe is fixed with at least one first inner sleeve assembly; The inwall of described second guide pipe is fixed with at least one second inner sleeve assembly.
In fuel assembly for nuclear reactor of the present utility model, described first guide pipe offers the first guide pipe discharge orifice, described first guide pipe discharge orifice is positioned at the top of described first inner sleeve assembly;
Described second guide pipe offers the second guide pipe discharge orifice, described second guide pipe discharge orifice is positioned at the top of described second inner sleeve assembly.
In fuel assembly for nuclear reactor of the present utility model, described first guide pipe and the equal both ends open of described second guide pipe;
Described first guide pipe comprises the first guide pipe end plug that sealing is fixed on its lower ending opening place; Described second guide pipe comprises the second guide pipe end plug that sealing is fixed on its lower ending opening place.
In fuel assembly for nuclear reactor of the present utility model, described fuel assembly for nuclear reactor also comprises base, nuclear core component hold-down assembly, bottom nozzle, grid spacer and fuel rod.
In fuel assembly for nuclear reactor of the present utility model, described fuel assembly for nuclear reactor also comprises the gauge pipe being positioned at described fuel assembly center.
Implement the technical solution of the utility model, at least there is following beneficial effect: the structure of the guide pipe of this fuel assembly for nuclear reactor inside or size are different, impact to fuel assembly when making nuclear power station personnel by choose reasonable and arrange at least two kinds of guide pipes to adjust the whereabouts of C&P systems, thus accurate control is compared to impact force parameter.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the distributed architecture schematic diagram of the guide pipe of fuel assembly for nuclear reactor in an embodiment of the present utility model;
Fig. 2 is the structural representation of the guide pipe of fuel assembly for nuclear reactor in embodiment 1 of the present utility model;
Fig. 3 is the structural representation of the guide pipe of fuel assembly for nuclear reactor in embodiment 2 of the present utility model;
Fig. 4 is the structural representation of the guide pipe of fuel assembly for nuclear reactor in embodiment 3 of the present utility model;
Fig. 5 is the structural representation of the guide pipe of fuel assembly for nuclear reactor in embodiment 4 of the present utility model;
Fig. 6 is the structural representation of the guide pipe of fuel assembly for nuclear reactor in embodiment 5 of the present utility model;
Fig. 7 is the distributed architecture schematic diagram of the guide pipe of fuel assembly for nuclear reactor in another embodiment of the present utility model;
Wherein, the 1, first guide pipe; 2, the second guide pipe; 3, large footpath section; 4, path section; 5, the first breeze way; 6, outer segment; 7, interior pipeline section; 8, the second breeze way; 9, gauge pipe.
Embodiment
In order to there be understanding clearly to technical characteristic of the present utility model, object and effect, now contrast accompanying drawing and describe embodiment of the present utility model in detail.
Fig. 1 to Fig. 7 shows a kind of fuel assembly for nuclear reactor in the utility model, and structure or the size of the inner guide pipe of this fuel assembly for nuclear reactor are different, but the layout of guide pipe still follows particular requirement.Namely this fuel assembly for nuclear reactor have employed the guide pipe of at least two kinds of different structures or size, and makes the layout of guide pipe follow particular requirement, runs the preventative maintenance requirement of nuclear power plant to control rod and top guide cylinder effectively to meet.
Fig. 1 is the distributed architecture schematic diagram of the guide pipe of fuel assembly for nuclear reactor in an embodiment of the present utility model.Fig. 2 is the structural representation of the guide pipe of fuel assembly for nuclear reactor in embodiment 1 of the present utility model.Fig. 3 is the structural representation of the guide pipe of fuel assembly for nuclear reactor in embodiment 2 of the present utility model.Fig. 4 is the structural representation of the guide pipe of fuel assembly for nuclear reactor in embodiment 3 of the present utility model.Fig. 5 is the structural representation of the guide pipe of fuel assembly for nuclear reactor in embodiment 4 of the present utility model.Fig. 6 is the structural representation of the guide pipe of fuel assembly for nuclear reactor in embodiment 5 of the present utility model.Fig. 7 is the distributed architecture schematic diagram of the guide pipe of fuel assembly for nuclear reactor in another embodiment of the present utility model.
As shown in Figure 1, be distributed as example with typical 17 × 17 PWR fuel assemblies, this fuel assembly for nuclear reactor contains 24 guide pipes, and certainly, the quantity of guide pipe is not limited to 24.Wherein, this fuel assembly for nuclear reactor at least comprises the first guide pipe group and the second guide pipe group.This first guide pipe group comprises 8 the first guide pipes 1, and this second guide pipe group comprises 16 the second guide pipes 2.Wherein, the first guide pipe 1 is different with the second guide pipe 2 structure or size, and this first guide pipe 1 and the alternately arrangement in rule of the second guide pipe 2.Rule alternately arrangement is specially: it is peripheral and in equidistant spaced apart that 8 the first guide pipes 1 are positioned at this fuel assembly, and in the interval of adjacent two the first guide pipes 1, be furnished with this second guide pipe 2 of equal number, be furnished with 1 the second guide pipe 2 in the interval of two namely adjacent the first guide pipes 1, other the second guide pipe 2 is centrosymmetric in the inside of this fuel assembly arrangement.
It should be noted that, although this fuel assembly for nuclear reactor have employed the guide pipe of at least two kinds of different structures or size, but two or more guide pipe is still arranged according to specific orientation and is not done position adjustment, reason is that each C&P systems is arrange according to specific orientation and do not do position adjustment in nuclear power plant, only have two or more guide pipe to meet specific orientation to arrange, this fuel assembly just effectively can be arranged in pairs or groups with C&P systems, meets the preventative maintenance requirement of C&P systems and top guide cylinder.
The first guide pipe 1 and the second guide pipe 2 that embodiments provides multipair different structure or size more of the present utility model, is specifically described as follows:
Embodiment 1:
As shown in Figure 2, this first guide pipe 1 comprises large footpath section 3, path section 4 and connects the first breeze way 5 of this large footpath section 3 and this path section 4; This second guide pipe 2 comprises outer segment 6, interior pipeline section 7 and connects the second breeze way 8 of this outer segment 6 and this interior pipeline section 7; Wherein, the height of the first breeze way 5 is greater than the height of this second breeze way 8.And the external diameter of the interior pipeline section 7 of the second guide pipe 2 is less than the internal diameter of outer segment 6, and the external diameter of the large footpath section 3 of this first guide pipe 1 is greater than the internal diameter of this outer segment 6.Further, the internal diameter of the path section 4 of this first guide pipe 1 is less than the internal diameter of the interior pipeline section 7 of the second guide pipe 2.Further, the external diameter of the large footpath section 3 of this first guide pipe 1 is greater than the external diameter of the outer segment 6 of the second guide pipe 2.
Embodiment 2:
As shown in Figure 3, this first guide pipe 1 comprises outer segment 6, interior pipeline section 7 and connects the first breeze way 5 of this outer segment 6 and this interior pipeline section 7; This second guide pipe 2 comprises large footpath section 3, path section 4 and connects the second breeze way 8 of this large footpath section 3 and this path section 4; Wherein, the height of the first breeze way 5 is less than the height of this second breeze way 8.And the external diameter of the interior pipeline section 7 of the first guide pipe 1 is less than the internal diameter of outer segment 6, and the external diameter of the large footpath section 3 of this second guide pipe 2 is less than the internal diameter of this outer segment 6.Further, the internal diameter of the interior pipeline section 7 of this first guide pipe 1 is less than the internal diameter of the path section 4 of the second guide pipe 2.Further, the external diameter of the outer segment 6 of this first guide pipe 1 is less than the external diameter of the large footpath section 3 of the second guide pipe 2.
Embodiment 3:
As shown in Figure 4, this first guide pipe 1 comprises outer segment 6, interior pipeline section 7 and connects the first breeze way 5 of this outer segment 6 and this interior pipeline section 7; This second guide pipe 2 also comprises outer segment 6, interior pipeline section 7 and connects the second breeze way 8 of this outer segment 6 and this interior pipeline section 7; Wherein, the height of the first breeze way 5 is less than the height of this second breeze way 8.
Embodiment 4:
As shown in Figure 5, this first guide pipe 1 comprises large footpath section 3, path section 4 and connects the first breeze way 5 of this large footpath section 3 and this path section 4; This second guide pipe 2 comprises large footpath section 3, path section 4 and connects the second breeze way 8 of this large footpath section 3 and this path section 4; Wherein, the height of the first breeze way 5 is less than the height of this second breeze way 8.
Embodiment 5:
As shown in Figure 6, this first guide pipe 1 comprises outer segment 6, interior pipeline section 7 and connects the first breeze way 5 of this outer segment 6 and this interior pipeline section 7; This second guide pipe 2 also comprises outer segment 6, interior pipeline section 7 and connects the second breeze way 8 of this outer segment 6 and this interior pipeline section 7; Wherein, the height of the first breeze way 5 is identical with the height of this second breeze way 8, but the internal diameter of the interior pipeline section 7 of the first guide pipe 1 is less than the internal diameter of the interior pipeline section 7 of the second guide pipe 2.
To sum up, the structure of the guide pipe of this fuel assembly for nuclear reactor inside or size are different, impact to fuel assembly when making nuclear power station personnel by choose reasonable and arrange at least two kinds of guide pipes to adjust the whereabouts of C&P systems, thus accurate control is compared to impact force parameter.Make a concrete analysis of as follows:
Under the prerequisite of C&P systems mass conservation, it falls to the impulsive force of fuel assembly and the breeze way height of fuel assembly guide pipe and guide pipe internal diameter important relevant (namely to two parameters are more responsive above).For 17 × 17 PWR fuel assemblies, if 24 guide pipes are identical in fuel assembly, so can only the size (guide pipe breeze way height or internal diameter) of integrated regulation 24 guide pipes when adjusting the impulsive force of control rod pair fuel assembly, the precision adjusted like this is very little.In same fuel assembly, adopt different guide pipes, such as, adjust internal diameter and the breeze way height of 4/24 or 8/24 guide pipe, just comparatively accurately can adjust the impulsive force of C&P systems to fuel assembly.
In addition, owing to adopting the guide pipe design of different structure or size in this fuel assembly for nuclear reactor inside, and guide pipe is the main structural components of fuel assembly, therefore the guide pipe of different structure can be selected as required, reach the object of the adjustment rigidity of fuel assembly and the assignment of traffic of fuel assembly inside, thus reduce the bending of fuel assembly and hydraulic performance.Make a concrete analysis of as follows:
Guide pipe is the main structural member of fuel assembly, and its size (such as material thickness) directly affects axis and the lateral stiffness of fuel assembly.From the viewpoint of mechanically deform, the rigidity of fuel assembly is the bigger the better, and namely guide pipe external diameter is larger, internal diameter is the smaller the better; But from the viewpoint of thermal property, the internal diameter of guide pipe too young pathbreaker cause coolant flow deficiency in guide pipe burn control rod, from the viewpoint of Automatic manual transmission guide pipe external diameter too senior general cause interfering with fuel rod or screen work the problem that cannot assemble.So a balance will be found from many factors.If 24 guide pipes are identical, so when controlling above-mentioned relation, precision is very little, if adopt different guide pipes in same fuel assembly, such as, adjust internal diameter and the external diameter of 4/24 or 8/24 guide pipe, just comparatively accurately or easily can reach above-mentioned technique effect.
As shown in Figure 7, be still distributed as example with typical 17 × 17 PWR fuel assemblies, this fuel assembly for nuclear reactor contains 24 guide pipes, and certainly, the quantity of guide pipe is not limited to 24.Wherein, this fuel assembly for nuclear reactor at least comprises the first guide pipe group and the second guide pipe group.This first guide pipe group comprises 4 the first guide pipes 1, and this second guide pipe group comprises 20 the second guide pipes 2.Wherein, the first guide pipe 1 is different with the second guide pipe 2 structure or size, and this first guide pipe 1 and the alternately arrangement in rule of the second guide pipe 2.Rule alternately arrangement is specially: it is peripheral and in equidistant spaced apart that 4 the first guide pipes 1 are positioned at this fuel assembly, and in the interval of adjacent two the first guide pipes 1, be furnished with this second guide pipe 2 of equal number, be furnished with 3 the second guide pipes 2 in the interval of two namely adjacent the first guide pipes 1, other the second guide pipe 2 is centrosymmetric in the inside of this fuel assembly arrangement.
In one embodiment, the structure of above-mentioned first guide pipe 1 and the second guide pipe 2 has diversity, such as, the inwall of this first guide pipe 1 can be fixed with at least one first inner sleeve assembly (not shown), the inwall of this second guide pipe 2 can be fixed with at least one second inner sleeve assembly (not shown).
Further, this first guide pipe 1 can offer the first guide pipe discharge orifice (not shown), this first guide pipe discharge orifice is positioned at the top of this first inner sleeve assembly.This second guide pipe 2 can offer the second guide pipe discharge orifice (not shown), this second guide pipe discharge orifice is positioned at the top of this second inner sleeve assembly.The Main Function of this discharge orifice is to be convenient to the cooling to associated component rod, and makes the cooling medium of pressurized flow out guide pipe when control rod inserts.
Further, this first guide pipe 1 and this second guide pipe 2 all can both ends opens (not shown), this first guide pipe 1 can comprise the first guide pipe end plug (not shown) that sealing is fixed on its lower ending opening place, and this second guide pipe 2 can comprise the second guide pipe end plug (not shown) that sealing is fixed on its lower ending opening place.
It should be noted that, this fuel assembly for nuclear reactor also comprises base, nuclear core component hold-down assembly, bottom nozzle, grid spacer and fuel rod.Further, as shown in Figure 1 and Figure 7, this fuel assembly for nuclear reactor also can comprise the gauge pipe 9 being positioned at this fuel assembly center, certainly, and also can not this gauge pipe 9 for particular type fuel assembly.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various change, combination and change.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within right of the present utility model.
Claims (10)
1. a fuel assembly for nuclear reactor, is characterized in that, at least comprises the first guide pipe group and the second guide pipe group; Described first guide pipe group comprises some first guide pipes (1); Described second guide pipe group comprises some second guide pipes (2); Described first guide pipe (1) is different with the second guide pipe (2) structure or size, and the alternately arrangement in rule of described first guide pipe (1) and the second guide pipe (2).
2. fuel assembly for nuclear reactor according to claim 1, is characterized in that, described first guide pipe (1) comprises the first breeze way (5), and described second guide pipe (2) comprises the second breeze way (8); The height of described first breeze way (5) is greater than or less than the height of described second breeze way (8).
3. fuel assembly for nuclear reactor according to claim 2, is characterized in that, described first guide pipe (1) comprises large footpath section (3) and path section (4) that are connected by described first breeze way (5); Described second guide pipe (2) comprises the outer segment (6) and interior pipeline section (7) that are connected by described second breeze way (8); And the external diameter of described interior pipeline section (7) is less than the internal diameter of described outer segment (6);
The internal diameter of the path section (4) of described first guide pipe (1) is greater than or less than the internal diameter of the interior pipeline section (7) of described second guide pipe (2).
4. fuel assembly for nuclear reactor according to claim 3, is characterized in that, the external diameter in large footpath section (3) of described first guide pipe (1) is greater than or less than the external diameter of the outer segment (6) of described second guide pipe (2).
5. fuel assembly for nuclear reactor according to claim 1, is characterized in that, it is peripheral and in equidistant spaced apart that described first guide pipe (1) is positioned at described fuel assembly; And in the interval of the first guide pipe (1) described in adjacent two, be furnished with described second guide pipe (2) of equal number.
6. the fuel assembly for nuclear reactor according to any one of claim 1 to 5, is characterized in that, the inwall of described first guide pipe (1) is fixed with at least one first inner sleeve assembly; The inwall of described second guide pipe (2) is fixed with at least one second inner sleeve assembly.
7. fuel assembly for nuclear reactor according to claim 6, is characterized in that, described first guide pipe (1) offers the first guide pipe discharge orifice, and described first guide pipe discharge orifice is positioned at the top of described first inner sleeve assembly;
Described second guide pipe (2) offers the second guide pipe discharge orifice, and described second guide pipe discharge orifice is positioned at the top of described second inner sleeve assembly.
8. fuel assembly for nuclear reactor according to claim 6, is characterized in that, described first guide pipe (1) and described second guide pipe (2) all both ends opens;
Described first guide pipe (1) comprises the first guide pipe end plug that sealing is fixed on its lower ending opening place; Described second guide pipe (2) comprises the second guide pipe end plug that sealing is fixed on its lower ending opening place.
9. the fuel assembly for nuclear reactor according to any one of claim 1 to 5, is characterized in that, described fuel assembly for nuclear reactor also comprises base, nuclear core component hold-down assembly, bottom nozzle, grid spacer and fuel rod.
10. fuel assembly for nuclear reactor according to claim 9, is characterized in that, described fuel assembly for nuclear reactor also comprises the gauge pipe (9) being positioned at described fuel assembly center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520452879.3U CN204760042U (en) | 2015-06-26 | 2015-06-26 | Nuclear reactor fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520452879.3U CN204760042U (en) | 2015-06-26 | 2015-06-26 | Nuclear reactor fuel assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204760042U true CN204760042U (en) | 2015-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520452879.3U Active CN204760042U (en) | 2015-06-26 | 2015-06-26 | Nuclear reactor fuel assembly |
Country Status (1)
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|---|---|
| CN (1) | CN204760042U (en) |
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2015
- 2015-06-26 CN CN201520452879.3U patent/CN204760042U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518031 Guangdong province Futian District Shangbu Road West of the city of Shenzhen Shenzhen science and technology building 15 layer (1502-1504, 1506) Patentee after: CHINA NUCLEAR POWER TECHNOLOGY RESEARCH INSTITUTE Patentee after: China General Nuclear Power Corporation Address before: 518031 Guangdong province Futian District Shangbu Road West of the city of Shenzhen Shenzhen science and technology building 15 layer (1502-1504, 1506) Patentee before: Zhongkehua Nuclear Power Technology Institute Co., Ltd. Patentee before: China General Nuclear Power Corporation |