CN203966569U - Keep grid and the fuel assembly with this maintenance grid - Google Patents
Keep grid and the fuel assembly with this maintenance grid Download PDFInfo
- Publication number
- CN203966569U CN203966569U CN201420334738.7U CN201420334738U CN203966569U CN 203966569 U CN203966569 U CN 203966569U CN 201420334738 U CN201420334738 U CN 201420334738U CN 203966569 U CN203966569 U CN 203966569U
- Authority
- CN
- China
- Prior art keywords
- band
- planar projections
- grid
- fuel rod
- arch projection
- Prior art date
- 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.)
- Expired - Lifetime
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 74
- 238000012423 maintenance Methods 0.000 title claims abstract description 45
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 239000002826 coolant Substances 0.000 description 8
- FWQHNLCNFPYBCA-UHFFFAOYSA-N fluoran Chemical compound C12=CC=CC=C2OC2=CC=CC=C2C11OC(=O)C2=CC=CC=C21 FWQHNLCNFPYBCA-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 238000004080 punching Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003758 nuclear fuel Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 238000002910 structure generation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Clamps And Clips (AREA)
Abstract
The open a kind of grid that keeps of the utility model, comprise multiple interior bands and outer band, multiple interior bands intersect the grill unit that is latticed cell structure and forms multiple hollows mutually, outer band is around in the peripheral of cell structure and fixes with interior band, keep grid also to comprise multiple holders, holder clamps and is fixed on interior band, holder comprises the first band and the second band that lay respectively at interior band both sides, the first band is to protruding out the landform projection that overarches in grill unit, the second band forms planar projections to protruding out in adjacent grill unit, arch projection in same grill unit and the common fuel rod that is positioned at grill unit that clamps of planar projections, arch projection and planar projections be extending axially along fuel rod all.This maintenance grid difficulty of processing is low, and the pressure loss is little and be subject to hydraulic equilibrium, and stability is high.
Description
Technical field
The utility model relates to nuclear reactor technology field, relates in particular to a kind of grid and fuel assembly with this maintenance grid of keeping.
Background technology
The fuel rod of some is arranged (as: 15 × 15 or 16 × 16 etc.) and is fixed to a branch of according to certain intervals, be called reactor fuel assemblies, reactor fuel assemblies is mainly made up of upper base, bottom nozzle, maintenance grid (also claiming mixing grillwork or grid spacer), control rod guide pipe and fuel rod.Wherein, keep grid for loading and locate fuel rod and being made up of multiple interior bands and outer band, the mutually orthogonal formation of multiple interior bands has the latticed cell structure of multiple grill unit, and outer band is surrounded on outside interior band regularly.Except a few grill unit is used for arranging control rod guide pipe, an accommodating fuel rod in remaining each grill unit.
In the process of fuel assembly work, cooling medium (water) is flowed through fuel assembly continuously from lower to upper to take away the amount of heat producing in fuel rod fission reaction, the mobile meeting of cooling medium is to keeping the fuel rod in grid to produce certain impact, therefore, in order to keep the stable of fuel rod, as shown in Figure 1, keeping being provided with in addition on the interior band of grid towards the firm protruding a and the spring b that protrude out in grill unit, utilize firm protruding a to support with spring b the elasticity of fuel rod is supported to clamp firm fuel rod the rigidity of fuel rod.Wherein firm protruding a is pressed in interior band upper punch, and spring b engages and is welded and fixed on interior band after being shaped to separately hair fastener shape.
In prior art, the maintenance grid of this structure has following shortcoming: first, firm protruding a adopts the mode of punching press directly to make on interior band, and the operation of punching press is comparatively complicated, and difficulty of processing is higher, and easily on interior band, cracks when punch process; Secondly, existing firm protruding a is the bridge architecture vertical with fuel rod, for ensureing thering is the plane area of certain length after its moulding of the power of supporting of fuel rod, therefore caused the length of firm protruding a larger, keep the fluoran stream surface of grid long-pending thereby increased, increase the pressure loss, be unfavorable for ANALYSIS OF COOLANT FLOW heat radiation; In addition, due to firm protruding a in prior art scheme and spring b skewness, and the fluoran stream surface of firm protruding a and spring b is long-pending different, has caused the waterpower imbalance that keeps grid to be subject under the impact of reactor internal coolant, while easily operation in heap, vibrates.
Therefore, be necessary to provide a kind of difficulty of processing low, the little and hydraulically balanced new maintenance grid that is subject to of the pressure loss.
Utility model content
The purpose of this utility model is to provide a kind of difficulty of processing low, the little and hydraulically balanced new maintenance grid that is subject to of the pressure loss.
Another object of the present utility model is to provide a kind of fuel assembly with described maintenance grid.
To achieve these goals, the utility model provides a kind of maintenance grid, comprise multiple interior bands and outer band, multiple described interior bands intersect the grill unit that is latticed cell structure and forms multiple hollows mutually, described outer band is around in the peripheral of described cell structure and fixes with described interior band, described maintenance grid also comprises multiple holders, described holder clamps and is fixed on described interior band, described holder comprises the first band and the second band that lay respectively at described interior band both sides, described the first band is to protruding out the landform projection that overarches in described grill unit, described the second band forms planar projections to protruding out in adjacent described grill unit, described arch projection in same described grill unit and the common fuel rod that is positioned at described grill unit that clamps of planar projections, all extending axially along described fuel rod of described arch projection and planar projections.
Compared with prior art, in maintenance grid described in the utility model by forming respectively described arch projection and planar projections clamps fuel rod on described the first band and the second band, realize just protruding effect in prior art by described planar projections, therefore saved just protruding technological process of punching press on described interior band, the moulding separately of described holder, its moulding process is simpler, and difficulty of processing is lower, and can be to the structure generation harmful effect of described interior band.Simultaneously, due to described arch projection and all extending axially along described fuel rod of planar projections, therefore ensureing under the prerequisite that described arch projection and planar projections fully contact with described fuel rod, described the first band and the second band can arrange more elongated, thereby reduce the projected area in the plane perpendicular to described fuel rod, the fluoran stream surface that has reduced described maintenance grid is long-pending, thereby reduces the pressure loss.And save, original just protruding rear described arch projection can be more even with arranging of planar projections, makes also balance more of waterpower that described maintenance grid is subject to, and then ensure that described maintenance grid is difficult for vibrating reactor is inner.
Preferably, described arch projection equates with the projected area of planar projections in the plane perpendicular to described fuel rod.By described arch projection and equating that the projected area of planar projections arranges, can make the above arch projection that flows to of cooling medium in reactor amass and equate with the fluoran stream surface of planar projections, thereby the described arch projection waterpower suffered with planar projections is equated, be conducive to the balance of described maintenance grid entirety and stablize.
Preferably, described the second band be formed with two described in planar projections, described in two, planar projections is along the axial array of described fuel rod, the position of described arch projection is in described in two between planar projections.By planar projections described in arranging two, thereby can increase with the contact area of described fuel rod, described fuel rod is formed to more firm supporting.
Preferably, described arch projection has plane area, and described plane area contacts with described fuel rod.Being arranged so that the contact of described arch projection to described fuel rod and supporting more stable of described plane area.
Preferably, described the first band be formed with two described in arch projection, described in two arch projection along the axial array of described fuel rod, described the second band be formed with two described in planar projections, described in two, planar projections is along the axial array of described fuel rod.Described in two, arch projection and planar projections acting in conjunction described in two, form more firm clamping by increasing contact area to described fuel rod.
Particularly, described in two, the position of planar projections is corresponding with arch projection described in two respectively.
Preferably, described the first band or the second band bend inwards to protrude out and form at least positioning protrusion, and on described interior band, correspondence is offered pilot hole, and described positioning convex snaps in described pilot hole.Described positioning convex and pilot hole cooperatively interact, and make described holder on described interior band, to be positioned at precalculated position.
Preferably, the ratio of rigidity of described planar projections and arch projection is in the scope of 20:1-1:1.Described planar projections forms rigidity to described fuel rod and supports, and described arch projection is supported described fuel rod formation elasticity.
Preferably, one end of described the first band and the second band interfixes, and the other end is separated from one another.
Preferably, in same described grill unit, planar projections or the adjacent setting of arch projection described in two, and described planar projections and arch projection are oppositely arranged.
The utility model also provides a kind of fuel assembly, comprise base, bottom nozzle, multiple control rod guide pipe, multiple fuel rod and multiple described maintenance grid, multiple described maintenance grids are arranged along the vertical direction, multiple described fuel rods and control rod guide pipe are inserted in respectively described maintenance grid, the upper end of described control rod guide pipe and described upper base are fixed, and the lower end of described control rod guide pipe and described bottom nozzle are fixed.
Compared with prior art, because the utility model has adopted described maintenance grid, therefore difficulty of processing is lower, and keeps the pressure loss of cooling medium in grid little, hydraulic equilibrium, and described maintenance grid is more stable, is difficult for vibrating in reactor inside.
Brief description of the drawings
Fig. 1 keeps band upper spring in grid and just protruding setting position schematic diagram in prior art.
Fig. 2 is the structural representation of prior art medi-spring.
Fig. 3 is the composition structural representation of the utility model fuel assembly.
Fig. 4 is the partial plan that the utility model keeps grid.
Fig. 5 is the stereographic map of holder in the utility model.
Fig. 6 is the stereographic map of another angle of holder in the utility model.
Fig. 7 is the side view of holder in the utility model.
Fig. 8 be in the utility model in the schematic diagram of mounting hole and pilot hole on band.
Fig. 9 is the scheme of installation of holder on interior band.
Figure 10 is arch projection and the clamping design sketch of planar projections to fuel rod in the utility model.
Figure 11 is arch projection and the setting position schematic diagram of planar projections in a grill unit in the utility model.
Figure 12 is the stereographic map of holder in another embodiment in the utility model.
Figure 13 is the stereographic map of holder in another embodiment in the utility model.
Embodiment
Below in conjunction with the Figure of description providing, preferred embodiment of the present utility model is made to description.
As shown in Figure 3, the utility model discloses a kind of light water reactor nuclear fuel assembly, comprise base 1, bottom nozzle 2, multiple control rod guide pipe 3, multiple fuel rod 4 and multiple described maintenance grid 5, multiple described maintenance grids 5 along the vertical direction (described fuel rod 4 axially) are arranged, multiple described control rod guide pipes 3 and fuel rod 4 are inserted in respectively described maintenance grid 5, the upper end of described control rod guide pipe 3 and described upper base 1 are fixing, and the lower end of described control rod guide pipe 3 and described bottom nozzle 2 are fixing.In reactor, cooling medium is axially flowing into described fuel assembly and fuel rod 4 carried out cooling heat dissipation to base 1 from described from described bottom nozzle 2 and flow out along described fuel rod 4 from bottom to top.
As shown in Figure 4, described maintenance grid 5 comprises multiple interior band 50, four outer bands 51 (only showing two in figure) and multiple holders 6, the mutual grill unit 500 that is latticed cell structure and forms multiple hollows of intersecting of multiple described interior bands 50, described outer band 51 is around in the peripheral of described cell structure fixing with described interior band 50.In described grill unit 500 a few for holding described control rod guide pipe 3, and other most of described grill unit 500 are interior all hold one described in fuel rod 4.Unlike the prior art, on described interior band 50, not punching press forms just protruding.
As shown in Figures 5 to 7, described holder 6 comprises the first band 61 and the second band 62, described the first band 61 and the second band 62 all along described fuel rod 4 extend axially and the width of described the first band 61 and the second band 62 less, described holder 6 is and hairpin structure like spring-like of the prior art.The upper end of described the first band 61 and the second band 62 is fixed, and lower end is separated from one another.The middle section position outward of described the first band 61 protrudes out landform and overarches protruding 610, the upper and lower side of described the second band 62 respectively outward protrudes out and forms two planar projections 620, described in two, planar projections 620 is along the axial array of described fuel rod 4, described planar projections 620 protrudes out towards the direction mutually deviating from described arch projection 610, and the height and position of described arch projection 610 is between planar projections described in two 620.
Described the first band 61 and the second band 62 are integrated one-piece constructions in the present embodiment, in other embodiment, can be also to be certainly fixedly attached to together after moulding respectively.
Described arch projection 610 is parts of described the first band 61 and the second band 62 with planar projections 620, therefore described arch projection 610 and planar projections 620 be all along the extending axially of described fuel rod 4, and described arch protruding 610 equates with the projected area of planar projections 620 in the plane perpendicular to described fuel rod 4.By described arch projection 610 and equating that the projected area of planar projections 620 arranges, can make the above arch projection 610 that flows to of cooling medium in reactor amass and equate with the fluoran stream surface of planar projections 620, thereby described arch projection 610 waterpower suffered with planar projections 620 are equated, be conducive to the balance of described maintenance grid 5 entirety and stablize.
The upper and lower side of described the first band 61 also respectively inwardly (to described the second band 62) bending protrude out that to form described in two positioning convex 611, two positioning convex 611 just corresponding with the back side of planar projections 620 described in two on described the second band 62.Refer again to Fig. 8 and Fig. 9,502, three the described pilot holes 502 of three pilot holes that offer mounting hole 501 on described interior band 50 and be positioned at described mounting hole 501 belows are from top to bottom arranged.While described holder 6 being installed on described interior band 50, described the first band 61 or the second band 62 are passed from described mounting hole 501, make described the first band 61 and the second band 62 lay respectively at the both sides of described interior band 50, then press and draw close described the first band 61 and the second band 62, positioning convex 611 described on described the first band 61 two is snapped in two described pilot holes 502, in the described pilot hole 502 of the lower end that described the first band 61 and the second band 62 clamp described interior band 50 and described the first band 61 and the second band 62 below, fix by the means such as welding are bonded to each other.Described positioning convex 611 cooperatively interacts with pilot hole 502, makes described holder 6 on described interior band 50, to be positioned at precalculated position.
Described holder 6 is installed behind the precalculated position being positioned on described interior band 50, because the width of described the first band 61 and the second band 62 is less, therefore can't fill up described grill unit 500, and described in each, the described arch of holder 6 projection 610 and planar projections 620 protrude out in grill unit 500 described in adjacent two respectively.Described arch projection 610 and planar projections 620 play respectively prior art medi-spring and just protruding effect, be that described arch projection 610 need form elasticity to described fuel rod 4 and supports, and need forming rigidity to described fuel rod 4, described planar projections 620 supports, in the present embodiment, described planar projections 620 is set to 20:1 (can be specifically to realize different-stiffness by different-thickness) with the ratio of rigidity of arch projection 610, allow by this described arch projection 610 there is elasticity, and described planar projections 620 have rigidity.Certainly, described planar projections 620 can also be any number or other ratios in the scope of 20:1-1:1 with the ratio of rigidity of arch projection 610.
Please refer to Fig. 4 and Figure 11, in whole described maintenance grid 5, multiple described holders 6 adopt such rule setting multiple described grill unit 500 (except holding the minority grill unit 500 of described control rod guide pipe 3) are upper: the second band 62 described in the first band 61 and two described in making to have two in grill unit 500 described in each, the wherein adjacent setting of the first band 61 described in two, the adjacent setting of the second band 62 described in two, and described the first band 61 and the second band 62 are to be oppositely arranged, in other words, described arch projection 610 described in one on holder 6 is adjacent settings with the described arch projection 610 on holder 6 described in another, described planar projections 620 described in one on holder 6 is adjacent settings with the described planar projections 620 on holder 6 described in another, and described arch projection 610 is oppositely arranged all the time with planar projections 620.
Compared with prior art, in maintenance grid 5 described in the utility model, by form respectively described arch projection 610 and planar projections 620 on described the first band 61 and the second band 62, fuel rod 4 is clamped, and planar projections 620 described in being provided with two on described the second band 62, more firm to supporting of described fuel rod 4, described planar projections 620 has realized just protruding effect in prior art, therefore saved just protruding technological process of punching press on described interior band 50, the moulding separately of described holder 6, its moulding process is simpler, difficulty of processing is lower, and can be to the structure generation harmful effect of described interior band 50.Simultaneously, due to described arch projection 610 and all extending axially along described fuel rod 4 of planar projections 620, therefore ensureing under the prerequisite that described arch projection 610 and planar projections 620 fully contact with described fuel rod 4, described the first band 61 and the second band 62 can arrange more elongated, thereby reduce the projected area in the plane perpendicular to described fuel rod 4, the fluoran stream surface that has reduced described maintenance grid 5 is long-pending, thereby reduces the pressure loss.And save, original just protruding rear described arch projection 610 can be more even with arranging of planar projections 620, makes also balance more of waterpower that described maintenance grid 5 is subject to, and then ensure that described maintenance grid 5 is difficult for vibrating reactor is inner.
As shown in figure 12, in another embodiment of the present utility model, the structure of holder 7 is slightly different from above embodiment, and the arch projection 710 of holder 7 described in the present embodiment has plane area 710a, and described plane area 710a contacts with described fuel rod 4.The contact that is arranged so that 710 pairs of described fuel rods 4 of described arch projection of described plane area 710a and support more stable.
As shown in figure 13, in another embodiment of the present utility model, the first band 81 of holder 8 is formed with two arch projections 810, described in two, arch projection 810 is along the axial array of described fuel rod 4, and the second band 82 is formed with two planar projections 820 corresponding with arch projection 810 difference described in two.Described in two, planar projections 820 actings in conjunction described in arch projection 810 and two, form firm clamping to described fuel rod 4.
Above disclosed is only preferred embodiments of the present utility model, its effect is facilitate those skilled in the art to understand and implement according to this, certainly can not limit with this interest field of the utility model, therefore the equivalent variations of doing according to the utility model claim, still belongs to the scope that the utility model is contained.
Claims (11)
1. one kind keeps grid, comprise multiple interior bands and outer band, multiple described interior bands intersect the grill unit that is latticed cell structure and forms multiple hollows mutually, described outer band is around in the peripheral of described cell structure and fixes with described interior band, it is characterized in that: described maintenance grid also comprises multiple holders, described holder clamps and is fixed on described interior band, described holder comprises the first band and the second band that lay respectively at described interior band both sides, described the first band is to protruding out the landform projection that overarches in described grill unit, described the second band forms planar projections to protruding out in adjacent described grill unit, described arch projection in same described grill unit and the common fuel rod that is positioned at described grill unit that clamps of planar projections, all extending axially along described fuel rod of described arch projection and planar projections.
2. maintenance grid as claimed in claim 1, is characterized in that: described arch projection equates with the projected area of planar projections in the plane perpendicular to described fuel rod.
3. maintenance grid as claimed in claim 1, is characterized in that: described the second band be formed with two described in planar projections, described in two, planar projections is along the axial array of described fuel rod, the position of described arch projection is in described in two between planar projections.
4. maintenance grid as claimed in claim 1, is characterized in that: described arch projection has plane area, and described plane area contacts with described fuel rod.
5. maintenance grid as claimed in claim 1, it is characterized in that: described the first band be formed with two described in arch projection, described in two, arch projection is along the axial array of described fuel rod, described the second band be formed with two described in planar projections, described in two, planar projections is along the axial array of described fuel rod.
6. maintenance grid as claimed in claim 5, is characterized in that: described in two, the position of planar projections is corresponding with arch projection described in two respectively.
7. maintenance grid as claimed in claim 1, is characterized in that: described the first band or the second band bend inwards to protrude out and form at least positioning protrusion, and on described interior band, correspondence is offered pilot hole, and described positioning convex snaps in described pilot hole.
8. maintenance grid as claimed in claim 1, is characterized in that: the ratio of rigidity of described planar projections and arch projection is in the scope of 20:1-1:1.
9. maintenance grid as claimed in claim 1, is characterized in that: one end of described the first band and the second band interfixes, and the other end is separated from one another.
10. maintenance grid as claimed in claim 1, is characterized in that: in same described grill unit, and planar projections or the adjacent setting of arch projection described in two, and described planar projections and arch projection are oppositely arranged.
11. 1 kinds of fuel assemblies, comprise base, bottom nozzle, multiple maintenance grid, multiple fuel rod and multiple control rod guide pipe, multiple described maintenance grids are arranged along the vertical direction, multiple described fuel rods and control rod guide pipe are inserted in respectively described maintenance grid, the upper end of described control rod guide pipe and described upper base are fixed, the lower end of described control rod guide pipe and described bottom nozzle are fixed, and it is characterized in that: described maintenance grid is as described in claim 1-10 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420334738.7U CN203966569U (en) | 2014-06-20 | 2014-06-20 | Keep grid and the fuel assembly with this maintenance grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420334738.7U CN203966569U (en) | 2014-06-20 | 2014-06-20 | Keep grid and the fuel assembly with this maintenance grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203966569U true CN203966569U (en) | 2014-11-26 |
Family
ID=51927123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420334738.7U Expired - Lifetime CN203966569U (en) | 2014-06-20 | 2014-06-20 | Keep grid and the fuel assembly with this maintenance grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203966569U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021821A (en) * | 2014-06-20 | 2014-09-03 | 中科华核电技术研究院有限公司 | Holding grille and fuel assembly with same |
-
2014
- 2014-06-20 CN CN201420334738.7U patent/CN203966569U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021821A (en) * | 2014-06-20 | 2014-09-03 | 中科华核电技术研究院有限公司 | Holding grille and fuel assembly with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 518000 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 Co.,Ltd. Patentee after: CHINA GENERAL NUCLEAR POWER Corp. Address before: 518000 Guangdong province Futian District Shangbu Road West of the city of Shenzhen Shenzhen science and technology building 15 layer (1502-1504, 1506) Patentee before: CHINA NUCLEAR POWER TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. Patentee before: CHINA GENERAL NUCLEAR POWER Corp. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20141126 |
|
| CX01 | Expiry of patent term |