CN103985419A - Fuel assembly locking device of liquid-state heavy metal reactor - Google Patents
Fuel assembly locking device of liquid-state heavy metal reactor Download PDFInfo
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- CN103985419A CN103985419A CN201410247684.5A CN201410247684A CN103985419A CN 103985419 A CN103985419 A CN 103985419A CN 201410247684 A CN201410247684 A CN 201410247684A CN 103985419 A CN103985419 A CN 103985419A
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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 invention provides a fuel assembly locking device of a liquid-state heavy metal reactor. The fuel assembly locking device comprises a reactor core fuel assembly (1), a lower grid plate (2) of a reactor core, a guide groove (3) of the grid plate, a fuel assembly pin (4), a fixed sleeve (5) and a fixed boss (6), wherein the reactor core fuel assembly (1) and the fuel assembly pin (4) are welded into a whole, the fixed sleeve (5) is axially fixed outside the fuel assembly pin (4) through a thread, and is capable of rotating around a center axis of the fuel assembly pin (4), the fixed boss (6) is welded on the surface of the fixed sleeve (5), the guide groove (3) of the grid plate is formed in a hole of the lower grid plate (2) of the reactor core, the fixed boss (6) is matched with the guide groove (3) of the grid plate, and the fuel assembly (1) is fixed on the lower grid plate (2) of the reactor core. The fuel assembly locking device provided by the embodiment of the invention is simple in structure and convenient to use; the fuel assembly locking device is located at a position with relatively weak neutron radiation when being used, the fuel assembly locking device is high in safety.
Description
Technical field
The present invention relates to the reactor core part design technical field of the cooling nuclear reactor of heavy metal, relate in particular to a kind of fuel assembly locking device of liquid heavy metal reactor.
Background technology
Liquid lead bismuth alloy, with its good neutronics performance, good anti-radiation performance, heat transfer property and security feature, has become current Accelerator Driven Subcritical system (Accelerator driven system; ADS) the system spallation target preferred material of cooling medium of holding concurrently, the cooling medium preferred material that plumbous bismuth cooling medium is also advanced fast neutron reactor simultaneously.Due to the intrinsic physical property of plumbous bismuth cooling medium, its density is much larger than the fuel assembly of liquid metal fast reactor, density difference will make fuel assembly produce larger buoyancy, and need to consider that cooling medium upwards flows the stream of assembly generation is caused to vibration problem from reactor core, so fuel assembly cannot rely on own wt to be fixed.Once fuel assembly produces play in reactor core, larger to security implication.
At present, the cooling fast neutron reactor of most liquid metal, all adopts pond formula structure in the world.For VVR type reactor, a loop is all immersed in heap pond, the state of reactor in sealing, and on top, be provided with blanketing gas (conventionally selecting argon gas) protection.Therefore in order not destroy reactor sealing state, prevent that radiomaterial from rushing down outward, the refuelling system of reactor preferably adopts machinery to carry out Remote operation to reload, to guarantee complete reactor boundary.
In current liquid heavy metal reactor fuel assemblies design proposal, there is the plumbous bismuth fast reactor of Russian modular (Svintsovo-Vismutovyi Bystryi Reaktor'-lead-bismuth fast reactor; Russia SVBR) fuel assembly scheme, European Union's Experiment Test Accelerator drive subcritical system (The eXperimental Accelerator Driven System; XADS) advanced plumbous cold demonstration fast reactor (the The Advanced Lead Fast Reactor European Demonstrator in fuel assembly scheme and Europe; ALFRED) fuel assembly scheme, and Belgian high-tech application Multifunctional hybrid power research reactor (Multi-purpose hybrid research reactor for high-tech applications; MYRRHA) fuel assembly scheme.Wherein SVBR fuel assembly is fixedly connected on heap in-core, cannot reload online.XADS fuel assembly arranges knot that can be undone by a pull in pin, and by the guide rod being connected with knot that can be undone by a pull, that controls knot that can be undone by a pull closes and open the handling that realize fuel assembly.This scheme has replaced fuel rod in the center of fuel assembly with guide rod, has reduced the fuel density in fuel assembly, has reduced the economy of reactor core, and guide rod is positioned at active region simultaneously, bears high-strength neutron irradiation, and its security cannot guarantee.ALFRED fuel assembly, by extending operating head, directly exposes reactor by operating head, at out-pile, carries out the fixing of fuel assembly.This scheme is because needs are opened top cover and reloaded, and the radgas in it can enter the outside space of reactor, need to increase other shieldings reactor is outside, prevent high radioactivity Leakage Gas.MYRRHA heap fuel assembly is that reactor diagrid is placed in to top, by reactor diagrid, pushes down fuel assembly, utilizes buoyancy to realize the fixing of fuel assembly.This scheme need to be reserved in reactor core bottom and hand over the large operating space of reloading, and this region need be full of lead bismuth alloy, has greatly lowered the economy of reactor.
In a word, above-mentioned existing Russian SVBR fuel assembly scheme, the XADS of European Union fuel assembly scheme and ALFRED fuel assembly scheme, and there is different defects in Belgian MYRRHA fuel assembly scheme.
Summary of the invention
The invention provides a kind of fuel assembly locking device of liquid heavy metal reactor, in order to solve the defect of various fuel assembly schemes in prior art.
The fuel assembly locking device that the invention provides a kind of liquid heavy metal reactor, described device comprises: reactor fuel assembly (1), reactor core lower grid plate (2), screen guide groove (3), fuel assembly pin (4), fixed muffle (5) and fixing lug boss (6);
Wherein, described reactor fuel assembly (1) is welded as a whole with described fuel assembly pin (4); Described fixed muffle (5) is axially fixed in the outside of described fuel assembly pin (4) by screw thread, and can rotate around the central shaft of described fuel assembly pin (4); Described fixing lug boss (6) is welded on the surface of described fixed muffle (5), described screen guide groove (3) is for being positioned at the hole of described reactor core lower grid plate (2), described fixing lug boss (6) coordinates with described screen guide groove (3), and described fuel assembly (1) is fixed on described reactor core lower grid plate (2).
Alternatively, in device as above, wherein, described reactor fuel assembly (1) is hexagon cylinder.
Alternatively, in device as above, wherein, described fuel assembly pin (4) is column type.
Alternatively, in device as above, wherein, described screen guide groove (3) is interior zigzag slot.
Alternatively, in device as above, wherein, the number of described fixing lug boss (6) is identical with the number of the interior zigzag slot of described screen guide groove (3).
Alternatively, in device as above, wherein, the number of the interior zigzag slot of the number of described fixing lug boss (6) and described screen guide groove (3) is three.
Alternatively, in device as above, wherein, described fuel assembly pin (4) comprises the top (41) of described fuel assembly pin (4) and bottom (42) two parts of described fuel assembly pin (4), described fixed muffle (5) is inserted in the described top (41) of described fuel assembly pin (4), the described bottom (42) of described fuel assembly pin (4) is connected with the described top (41) of described fuel assembly pin (4) by screw thread, and described fixed muffle (5) is axially fixed on described fuel assembly pin (4).
Alternatively, in device as above, wherein, between described fuel assembly pin (4) and described fixed muffle (5), for circular cone, contact with the line of circular arc.
The present invention also provide a kind of use as above the fuel assembly locking device of arbitrary described liquid heavy metal reactor carry out the method that fuel assembly reloads, comprise the steps:
When carrying out when filling with substance, refueling agency inserts the mounting hole in described reactor core lower grid plate (2) by controlling described reactor fuel assembly (1) by described fuel assembly pin (4), described fixed muffle (5) is slipped into described screen guide groove (3) together with described fixing lug boss (6), make described fixing lug boss (6) along the rotation of described screen guide groove (3) lower plane until bottommost;
Refueling agency pulls described reactor fuel assembly (1) upwards to promote, and makes described fixing lug boss (6) along the upper Plane Rotation of described screen guide groove (3) to top, and fixes with contacting of face by ball in this position;
When reloading, refueling agency presses down described reactor fuel assembly (1) again, described fixing lug boss (6) is along the rotation of screen guide groove (3) lower plane until after bottommost, refueling agency upwards promotes, described reactor fuel assembly (1) departs from described reactor core lower grid plate (2), and realization is reloaded.
The fuel assembly locking device of liquid heavy metal reactor of the present invention, by the cooperation of screen and fuel assembly, both for fuel assembly provides enough axial constraints, does not affect again fuel assembly and upwards takes out and reload.The fuel assembly locking device of liquid heavy metal reactor of the present invention, simple in structure, very easy to use, and can repeatedly use, can effectively reduce the cost that reloads.And while using, be positioned at the weak position of neutron irradiation, safe; Can also effectively prevent the play of fuel element in liquid heavy metal heap, and can realization response heap reload online.In addition, this kind of locking device can overcome the assembly thermal stress that axial deformation causes of being heated preferably.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The diagrammatic cross-section of the fuel assembly locking device of the liquid heavy metal reactor that Fig. 1 provides for the embodiment of the present invention.
Local axial section in the fuel assembly locking device of the liquid heavy metal reactor that Fig. 2 provides for the embodiment of the present invention.
Local longitudinal sectional drawing in the fuel assembly locking device of the liquid heavy metal reactor that Fig. 3 provides for the embodiment of the present invention.
Local axial stretch-out view in the fuel assembly locking device of the liquid heavy metal reactor that Fig. 4 provides for the embodiment of the present invention.
The method flow diagram that fuel assembly reloads is carried out in the use that Fig. 5 provides for the embodiment of the present invention as above fuel assembly locking device of the liquid heavy metal reactor of embodiment.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The diagrammatic cross-section of the fuel assembly locking device of the liquid heavy metal reactor that Fig. 1 provides for the embodiment of the present invention.As shown in Figure 1, the fuel assembly locking device of the liquid heavy metal reactor of the present embodiment comprises: reactor fuel assembly 1, reactor core lower grid plate 2, screen guide groove 3, fuel assembly pin 4, fixed muffle 5 and fixing lug boss 6.
Wherein, reactor fuel assembly 1 is welded as a whole with fuel assembly pin 4; Fixed muffle 5 is axially fixed in the outside of fuel assembly pin 4 by screw thread, and can rotate around the central shaft of fuel assembly pin 4; Fixing lug boss 6 is welded on the surface of fixed muffle 5, and screen guide groove 3 is for being positioned at the hole of reactor core lower grid plate 2, and fixing lug boss 6 coordinates with screen guide groove 3, and fuel assembly 1 is fixed on reactor core lower grid plate 2.
As shown in Figure 1, relative position from reactor fuel assembly 1, reactor core lower grid plate 2, screen guide groove 3, fuel assembly pin 4, fixed muffle 5 and fixing lug boss 6, reactor core lower grid plate 2 is inserted in the bottom of fuel assembly 1, by being axially fixed in coordinating of boss 6 on assembly pin 4 and screen guide groove 3, complete fuel assembly in the axial location of heap in-core.In the process of reloading, refueling machine captures the head of fuel assembly 1, can complete fuel assembly 4 in the fixing and release of heap in-core by simply moving up and down.
For example the reactor fuel assembly 1 in the present embodiment can be hexagon cylinder; Reactor fuel assembly 1 in reactor in the present embodiment adopts hexagon cylinder; This and the interior lattice cell of reactor are placed with relation.Hexagonal assembly could be stitched together mutually, anabolic reaction heap reactor core as honeycomb.Fuel assembly pin 4 is column type; Fuel assembly pin 4 also can adopt other shapes in theory, but because circle has good in medium-performance, and the convenience of processing, so in the design of fast neutron reactor, adopt columniform fuel assembly pin 4 better effects if, but do not repel, do not adopt other shapes, as square body shape.Screen guide groove 3 is interior zigzag slot.
Alternatively, the number of the fixing lug boss in the present embodiment 6 is identical with the number of the interior zigzag slot of screen guide groove 3.
The fuel assembly locking device of the liquid heavy metal reactor of the present embodiment, by the cooperation of screen and fuel assembly, both for fuel assembly provides enough axial constraints, does not affect again fuel assembly and upwards takes out and reload.The fuel assembly locking device of the liquid heavy metal reactor of the present embodiment, simple in structure, very easy to use, and can repeatedly use, can effectively reduce the cost that reloads.And while using, be positioned at the weak position of neutron irradiation, safe; Can also effectively prevent the play of fuel element in liquid heavy metal heap, and can realization response heap reload online.In addition, this kind of locking device can overcome the assembly thermal stress that axial deformation causes of being heated preferably.
Local axial section in the fuel assembly locking device of the liquid heavy metal reactor that Fig. 2 provides for the embodiment of the present invention.As shown in Figure 2, from axial section, fuel assembly pin 4 comprises the top 41 of fuel assembly pin 4 and bottom 42 two parts of fuel assembly pin 4, fixed muffle 5 is inserted in the top 41 of fuel assembly pin 4, the bottom 42 of fuel assembly pin 4 is connected with the top 41 of fuel assembly pin 4 by screw thread, and fixed muffle 5 is axially fixed on fuel assembly pin 4.For example between fuel assembly pin 4 and fixed muffle 5, for circular cone, contact with the line of circular arc, can effectively reduce the impact that produces self-brazing between two surface of contact due to metal diffusion.
Local longitudinal sectional drawing in the fuel assembly locking device of the liquid heavy metal reactor that Fig. 3 provides for the embodiment of the present invention.As shown in Figure 3, in the present embodiment, take the number of the number of fixing lug boss 6 and the interior zigzag slot of screen guide groove 3 is three technical schemes that illustrate as example.As shown in Figure 3, from longitudinal sectional drawing, screen guide groove 3 is arranged in the mounting hole of reactor core lower grid plate 2, fixed muffle 5 and the concentric installation of fuel assembly pin 4.The fixing lug boss 6 of every fuel assembly 1 has three, is positioned on fixed muffle 5.Fixing lug boss 6 is inserted in the position of screen guide groove 3 correspondences.
Local axial stretch-out view in the fuel assembly locking device of the liquid heavy metal reactor that Fig. 4 provides for the embodiment of the present invention.As shown in Figure 4, screen guide groove 3 launches vertically, and fixing lug boss 6 is moved along jagged edge screen guide groove 3 is interior.When carrying out when filling with substance, the mounting hole that refueling agency inserts fuel assembly pin 4 in reactor core lower grid plate 2, fixed muffle 5 drives fixing lug boss 6 to slip into screen guide groove 3, is arranged in figure position 1.; Fixing lug boss 6 down to bottommost, is arranged in figure position 2. along the 3 lower plane rotations of screen guide groove; Refueling agency upwards promotes, and fixing lug boss 6, along Plane Rotation on screen guide groove 3 to top, is arranged in figure position 3., and fixes with contacting of face by ball in this position.When reloading, refueling agency presses down reactor fuel assembly 1 again, fixing lug boss 6 is along the 3 lower plane rotations of screen guide groove until after bottommost, i.e. position 4. in figure, refueling agency upwards promotes, fixing lug boss 6 moves in figure position 5., and reactor fuel assembly 1 departs from reactor core lower grid plate 2, realizes the process of reloading.
The principle of work of the fuel assembly locking device of the liquid heavy metal reactor of above-described embodiment: the mounting hole that fuel assembly pin 4 is inserted in reactor core lower grid plate 2, fixed muffle 5 slips into screen guide groove 3 together with fixing lug boss 6, and makes fixing lug boss 6 along the 3 lower plane rotations of screen guide groove until bottommost; When upwards promoting reactor fuel assembly 1, the fixing lug boss 6 of bottom is followed 1 motion of reactor fuel assembly, make fixing lug boss 6 along Plane Rotation on screen guide groove 3 to top, and fix with contacting of face by ball in this position, this kind of contact, be conducive to prevent be still in for a long time in reactor core self-brazing effect between structural steel; While reloading, reactor fuel assembly 1 is pressed down again, fixing lug boss 6 is along the 3 lower plane rotations of screen guide groove until after bottommost, refueling agency upwards promotes, and reactor fuel assembly 1 departs from reactor core lower grid plate 2, and realization is reloaded.
The fuel assembly locking device of the liquid heavy metal reactor of above-described embodiment, by the cooperation of screen and fuel assembly, both for fuel assembly provides enough axial constraints, does not affect again fuel assembly and upwards takes out and reload.The fuel assembly locking device of the liquid heavy metal reactor of the present embodiment, simple in structure, very easy to use, and can repeatedly use, can effectively reduce the cost that reloads.And while using, be positioned at the weak position of neutron irradiation, safe; Can also effectively prevent the play of fuel element in liquid heavy metal heap, and can realization response heap reload online.In addition, this kind of locking device can overcome the assembly thermal stress that axial deformation causes of being heated preferably.
The method flow diagram that fuel assembly reloads is carried out in the use that Fig. 5 provides for the embodiment of the present invention as above fuel assembly locking device of the liquid heavy metal reactor of embodiment.Wherein, the fuel assembly locking device of liquid heavy metal reactor refers to the record of above-described embodiment, does not repeat them here.In use procedure, refueling agency is connected with the head of reactor fuel assembly 1, and refueling agency realizes by controlling reactor fuel assembly 1 the fuel assembly locking device of controlling liquid heavy metal reactor, and realization is reloaded.The method that fuel assembly reloads is carried out in the use of the present embodiment as above fuel assembly locking device of the liquid heavy metal reactor of embodiment, specifically can comprise the steps:
100, when carrying out when filling with substance, the mounting hole that refueling agency inserts fuel assembly pin 4 in reactor core lower grid plate 2 by controlling reactor fuel assembly 1, fixed muffle 5 is slipped into screen guide groove 3 together with fixing lug boss 6, make fixing lug boss 6 along the 3 lower plane rotations of screen guide groove until bottommost;
Fixing lug boss 6 is along the 3 lower planes rotations of screen guide groove until when bottommost, when reactor fuel assembly 1 moves upward, than being easier to and guide groove above coordinates.101, refueling agency pulls reactor fuel assembly 1 upwards to promote, and makes fixing lug boss 6 along Plane Rotation on screen guide groove 3 to top, and fixes with contacting of face by ball in this position;
Refueling agency pulls reactor fuel assembly 1 upwards to promote, the fixing lug boss 6 of bottom is followed 1 motion of reactor fuel assembly, thereby can so that fixing lug boss 6 along Plane Rotation on screen guide groove 3 to top, and fix with contacting of face by ball in this position, this kind of contact, be conducive to prevent be still in for a long time in reactor core self-brazing effect between structural steel.
102, when reloading, refueling agency presses down reactor fuel assembly 1 again, and fixing lug boss 6 is along the 3 lower plane rotations of screen guide groove until after bottommost, refueling agency upwards promotes, and reactor fuel assembly 1 departs from reactor core lower grid plate 2, and realization is reloaded.
By adopting the material-changing method of the present embodiment, make very conveniently, and the fuel assembly locking device of liquid heavy metal reactor, can repeatedly use, and can effectively reduce the cost that reloads.And the fuel assembly locking device of liquid heavy metal reactor is positioned at the weak position of neutron irradiation, safe; Can also effectively prevent the play of fuel element in liquid heavy metal heap, and can realization response heap reload online.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. the fuel assembly locking device of a liquid heavy metal reactor, it is characterized in that, described device comprises: reactor fuel assembly (1), reactor core lower grid plate (2), screen guide groove (3), fuel assembly pin (4), fixed muffle (5) and fixing lug boss (6);
Wherein, described reactor fuel assembly (1) is welded as a whole with described fuel assembly pin (4); Described fixed muffle (5) is axially fixed in the outside of described fuel assembly pin (4) by screw thread, and can rotate around the central shaft of described fuel assembly pin (4); Described fixing lug boss (6) is welded on the surface of described fixed muffle (5), described screen guide groove (3) is for being positioned at the hole of described reactor core lower grid plate (2), described fixing lug boss (6) coordinates with described screen guide groove (3), and described fuel assembly (1) is fixed on described reactor core lower grid plate (2).
2. device according to claim 1, is characterized in that, described reactor fuel assembly (1) is hexagon cylinder.
3. device according to claim 1, is characterized in that, described fuel assembly pin (4) is column type.
4. device according to claim 1, is characterized in that, described screen guide groove (3) is interior zigzag slot.
5. device according to claim 4, is characterized in that, the number of described fixing lug boss (6) is identical with the number of the interior zigzag slot of described screen guide groove (3).
6. device according to claim 5, is characterized in that, the number of the interior zigzag slot of the number of described fixing lug boss (6) and described screen guide groove (3) is three.
7. device according to claim 1, it is characterized in that, described fuel assembly pin (4) comprises the top (41) of described fuel assembly pin (4) and bottom (42) two parts of described fuel assembly pin (4), described fixed muffle (5) is inserted in the described top (41) of described fuel assembly pin (4), the described bottom (42) of described fuel assembly pin (4) is connected with the described top (41) of described fuel assembly pin (4) by screw thread, and described fixed muffle (5) is axially fixed on described fuel assembly pin (4).
8. device according to claim 7, is characterized in that, between described fuel assembly pin (4) and described fixed muffle (5), for circular cone, contacts with the line of circular arc.
9. use the as above fuel assembly locking device of the arbitrary described liquid heavy metal reactor of claim 1-9 to carry out the method that fuel assembly reloads, it is characterized in that, comprise the steps:
When carrying out when filling with substance, refueling agency inserts the mounting hole in described reactor core lower grid plate (2) by controlling described reactor fuel assembly (1) by described fuel assembly pin (4), described fixed muffle (5) is slipped into described screen guide groove (3) together with described fixing lug boss (6), make described fixing lug boss (6) along the rotation of described screen guide groove (3) lower plane until bottommost;
Refueling agency pulls described reactor fuel assembly (1) upwards to promote, and makes described fixing lug boss (6) along the upper Plane Rotation of described screen guide groove (3) to top, and fixes with contacting of face by ball in this position;
When reloading, refueling agency presses down described reactor fuel assembly (1) again, described fixing lug boss (6) is along the rotation of screen guide groove (3) lower plane until after bottommost, refueling agency upwards promotes, described reactor fuel assembly (1) departs from described reactor core lower grid plate (2), and realization is reloaded.
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| CN201410247684.5A CN103985419B (en) | 2014-06-05 | 2014-06-05 | A kind of fuel assembly locking device of liquid heavy metal reactor |
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| CN201410247684.5A CN103985419B (en) | 2014-06-05 | 2014-06-05 | A kind of fuel assembly locking device of liquid heavy metal reactor |
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| CN103985419B CN103985419B (en) | 2016-08-24 |
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| CN106531233A (en) * | 2016-12-29 | 2017-03-22 | 中国科学院合肥物质科学研究院 | Reactor fuel assembly |
| CN106782682A (en) * | 2016-12-30 | 2017-05-31 | 清华大学天津高端装备研究院 | A kind of fuel assembly for lead bismuth heap |
| CN107767967A (en) * | 2017-09-29 | 2018-03-06 | 中广核研究院有限公司 | Fuel assembly lower locking mechanism and locking, unlocking method |
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| CN106531233A (en) * | 2016-12-29 | 2017-03-22 | 中国科学院合肥物质科学研究院 | Reactor fuel assembly |
| CN106782682A (en) * | 2016-12-30 | 2017-05-31 | 清华大学天津高端装备研究院 | A kind of fuel assembly for lead bismuth heap |
| CN107767967A (en) * | 2017-09-29 | 2018-03-06 | 中广核研究院有限公司 | Fuel assembly lower locking mechanism and locking, unlocking method |
| CN107767967B (en) * | 2017-09-29 | 2019-10-08 | 中广核研究院有限公司 | Fuel assembly lower locking mechanism and locking, unlocking method |
| CN108053905A (en) * | 2017-12-18 | 2018-05-18 | 岭澳核电有限公司 | Fuel assembly lower locking mechanism and locking, unlocking method |
| CN109767850A (en) * | 2018-12-21 | 2019-05-17 | 中广核研究院有限公司 | Fuel assembly lower locking mechanism and its application method |
| CN109767851A (en) * | 2018-12-21 | 2019-05-17 | 中广核研究院有限公司 | Fuel assembly lower locking mechanism and its locking, unlocking method |
| CN109767850B (en) * | 2018-12-21 | 2023-08-25 | 中广核研究院有限公司 | Lower locking device of fuel assembly and using method thereof |
| CN109767851B (en) * | 2018-12-21 | 2023-08-25 | 中广核研究院有限公司 | Lower locking device of fuel assembly and locking and unlocking method thereof |
| CN109841287A (en) * | 2019-04-11 | 2019-06-04 | 哈尔滨工程大学 | A kind of liquid fuel nuclear reactor for realizing work by inertia force |
| CN110600145B (en) * | 2019-10-10 | 2020-07-14 | 中国科学院近代物理研究所 | Locking, unlocking and grabbing lifting device for lead-based reactor fuel assembly |
| CN110600145A (en) * | 2019-10-10 | 2019-12-20 | 中国科学院近代物理研究所 | Locking, unlocking and grabbing lifting device for lead-based reactor fuel assembly |
| CN110600144A (en) * | 2019-10-10 | 2019-12-20 | 中国科学院近代物理研究所 | Lower pipe seat buoyancy locking mechanism of lead-based reactor fuel assembly |
| CN111477364A (en) * | 2020-02-27 | 2020-07-31 | 中国原子能科学研究院 | Nuclear reactor assembly |
| CN111667928A (en) * | 2020-06-19 | 2020-09-15 | 中国科学院近代物理研究所 | Lead-based reactor fuel assembly locking structure |
| CN112863715B (en) * | 2020-12-30 | 2023-03-21 | 中国原子能科学研究院 | Rotary type material changing special structure for replacing control rod assembly moving body |
| CN112863715A (en) * | 2020-12-30 | 2021-05-28 | 中国原子能科学研究院 | Rotary type material changing special structure for replacing control rod assembly moving body |
| CN112837832A (en) * | 2020-12-30 | 2021-05-25 | 中国原子能科学研究院 | Rotary type material changing special structure for replacing outer sleeve of control rod assembly |
| CN113436755A (en) * | 2021-06-04 | 2021-09-24 | 中国原子能科学研究院 | Pin throttling device and small grid plate header assembly |
| CN113436755B (en) * | 2021-06-04 | 2024-02-20 | 中国原子能科学研究院 | Pin throttling device and small grid plate header assembly |
| CN113871042A (en) * | 2021-09-26 | 2021-12-31 | 中国原子能科学研究院 | Replacing device for control rod assembly moving body |
| CN113871042B (en) * | 2021-09-26 | 2023-12-12 | 中国原子能科学研究院 | Material changing device for control rod assembly moving body |
| WO2023077468A1 (en) * | 2021-11-05 | 2023-05-11 | 中广核研究院有限公司 | Fuel assembly locking device |
| CN114147362A (en) * | 2021-12-08 | 2022-03-08 | 西北有色金属研究院 | Method for improving corrosion resistance of stainless steel pipe plate joint weld of space nuclear reactor container |
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