CN210722485U - Fuel rod transfer device based on modular movable hot chamber - Google Patents
Fuel rod transfer device based on modular movable hot chamber Download PDFInfo
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- CN210722485U CN210722485U CN201921566191.2U CN201921566191U CN210722485U CN 210722485 U CN210722485 U CN 210722485U CN 201921566191 U CN201921566191 U CN 201921566191U CN 210722485 U CN210722485 U CN 210722485U
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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
A fuel rod transfer device based on a modular mobile heat cell, comprising: a base matching the channel of the modular mobile hot cell; the shielding body is arranged above the base, a channel is arranged inside the shielding body, the top end of the channel penetrates through the top of the shielding body, and the bottom end of the channel penetrates through the bottom of the base; an upper cover detachably mounted on the top of the shield body; a movable barrel disposed within the channel for receiving a fuel rod to be inspected; the sliding door assembly comprises a closed state and an open state, wherein the bottom end of the movable cylinder body is abutted against the upper surface of the sliding door assembly in the closed state, and the movable cylinder body can be taken out from the bottom end of the channel in the open state; the first shielding layer is arranged in the sliding door assembly; and a second shield layer provided in a wall surface of the shield body. The utility model discloses the in-process that the realization was examined the fuel rod and is shifted to the hot chamber of modularization from the pond, has sufficient shielding layer all the time around the fuel rod, avoids operating under the open radiation condition.
Description
Technical Field
The utility model relates to a damaged inspection field of fuel assembly, concretely relates to fuel rod transfer device based on hot chamber is removed to modularization.
Background
Once a fuel assembly is damaged in the operation process of a nuclear reactor, the reactor cannot normally operate at full power, and the safe operation of the reactor is seriously influenced. In order to find out the cause of the damage of the fuel assembly, it is necessary to perform the operations of analyzing the damage mechanism and locating the damage defect of the damaged fuel assembly.
As the condition of damaged fuel rod investigation, damaged defect positioning and the like is not provided on the nuclear facility site in China. In the past, the analysis of the damage reason of the fuel assembly needs to package the whole fuel assembly, transport the fuel assembly to a hot chamber with conditional inspection through a long distance, and then perform disassembly inspection. The transportation work risk of the spent fuel is high, and part of the short-life nuclide is attenuated after being approved and transported, so that the detection is difficult, and the reliability of the analysis of the damage reason is insufficient.
In order to improve the efficiency and reliability of fuel assembly breakage inspection and analysis, a modularized movable hot chamber is built, and when an assembly breakage accident occurs, the modularized movable hot chamber is transported to the site.
The fuel assemblies discharged from the reactor are usually kept in a pool, so that it is necessary to transfer the individual fuel rods, which have been disassembled from the broken fuel assemblies, from the pool to a modular mobile hot room for inspection. However, the prior art lacks a corresponding fuel rod transfer device, and therefore, there is a need to design a fuel rod transfer device which not only considers the radiation protection safety of personnel, but also solves the problems of shielding, storage, packaging, butt joint with a modular mobile heat chamber and the like of a fuel rod in the transfer process.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a both consider personnel radiation protection safety, can solve the fuel rod transfer device of the shielding of fuel rod in the transfer process, store, encapsulate, remove hot chamber butt joint scheduling problem with the modularization again to solve and lack among the prior art and transport the problem of carrying out the fuel rod transfer device of inspection in the modularization removal hot chamber from the pond with single fuel rod after the disintegration of damaged fuel assembly.
The utility model discloses a following technical scheme realizes:
a fuel rod transfer device based on a modular mobile heat cell, comprising:
a base, the bottom of the base matching the channel of the modular mobile hot cell;
the shielding body is arranged above the base, a channel is arranged inside the shielding body, the top end of the channel penetrates through the top of the shielding body, and the bottom end of the channel penetrates through the bottom of the base;
the upper top cover is detachably arranged on the top of the shielding body;
a movable barrel disposed within the channel, the movable barrel for receiving a fuel rod to be inspected;
the sliding door assembly comprises a closed state and an opened state, the bottom end of the movable cylinder body is abutted against the upper surface of the sliding door assembly in the closed state, and the movable cylinder body can be taken out from the bottom end of the channel in the opened state;
the first shielding layer is arranged in the sliding door assembly;
and a second shield layer provided in a wall surface of the shield body.
At present, because the nuclear facility field in China does not have the conditions of damaged fuel rod inspection, damaged defect positioning and the like, a modularized movable hot chamber is built. When a component breakage accident occurs, the modular mobile heat chamber is transported to the site for fuel rod inspection. In the field, the fuel assemblies discharged from the reactor are usually kept in a pool, so that it is necessary to transfer the individual fuel rods, which are disassembled from the broken fuel assemblies, from the pool to a modular mobile hot room for inspection. However, the prior art lacks a fuel rod transfer device which not only considers the radiation protection safety of personnel, but also can solve the problems of shielding, storage, packaging, butt joint with a modular mobile hot chamber and the like of a fuel rod in the transfer process.
In order to solve the problem, the utility model provides a fuel rod transfer device based on hot chamber is removed to modularization.
The fuel rod transfer device comprises a base, wherein the bottom structure of the base is matched with a channel of a modularized movable hot chamber, so that in the transfer process, the bottom of the base can be in butt joint with the channel of the movable hot chamber, and the movable cylinder body enters the interior of the hot chamber through the base and the channel of the movable hot chamber.
The shielding body is installed to the top of base, and the inside passageway that is provided with of shielding body, the internal diameter of shielding body are the diameter of passageway promptly. The upper end and the lower end of the channel penetrate through the top of the shielding body and the bottom of the base respectively to form a channel penetrating through the whole fuel rod transfer device, wherein the upper end of the channel is used for placing the movable cylinder, and the lower end of the channel is used for taking out the movable cylinder. Preferably, the diameter of the channel is slightly larger than the outer diameter of the movable cylinder, so as to reserve sufficient working clearance to allow the movable cylinder to move within the channel, but at the same time no wobbling in the radial direction of the channel occurs. A second shielding layer is arranged in the wall surface of the shielding body, and the second shielding layer is arranged in the wall surface of the shielding body, so that the side wall of the channel has a radiation protection function. Preferably, the second shielding layer is filled in the wall surface of the shielding body, and the second shielding layer wraps the side surface of the shielding body to form radiation protection on the side wall of the channel. The material of the second shielding layer may be a nuclear radiation shielding material commonly used in the art, and preferably, the second shielding layer is lead cast in the wall surface of the shielding body.
Sliding door assemblies are used to open or close the passageway. The arrangement positions of the sliding door assembly comprise at least two types. The first setting mode is that the sliding door component is completely arranged in a cavity in the base, and a top plate, a bottom plate and side plates of the sliding door are all contacted with the inner wall of the base; a second arrangement is for the sliding door assembly to be disposed within a cavity formed between the base and the shield. The sliding door assembly can comprise one sliding door or a combination of a plurality of sliding doors. Under the condition of a sliding door, required stroke when the more a plurality of sliding door of stroke that the sliding door need drag is combined is longer, and the operation is comparatively inconvenient, the utility model discloses the preferred sliding door subassembly that adopts a plurality of sliding door combinations. When sliding door upper surface and the movable barrel bottom contact of sliding door subassembly and butt, the sliding door subassembly was in the closure state this moment, and the movable barrel can't take out from the bottom of passageway through the sliding door subassembly, through the cooperation of sliding door subassembly with the last top cap of installing at the shielding body top, the movable barrel is spacing in the passageway, can't remove along the axial direction of passageway to the transportation of fuel rod. When the sliding door upper surface of the sliding door assembly is not contacted with or abutted against the bottom of the movable barrel, the limiting effect of the sliding door assembly is eliminated, and the movable barrel can be taken out from the bottom end of the channel and then transferred into the movable hot chamber. The sliding door assembly is provided with a first shielding layer, namely the sliding doors of the sliding door assembly are all of a hollow structure, and a nuclear radiation shielding material is arranged in the hollow structure so that in a closed state, preferably, the first shielding layer is lead poured inside the sliding door.
Through the arrangement, when the sliding door assembly is in a closed state, the upper end and the lower end of the movable cylinder body are respectively contacted with the upper top cover and the sliding door assembly, and the side wall of the movable cylinder body is contacted with the inner wall of the shielding body, so that the movable cylinder body cannot move relative to the channel; meanwhile, the first shielding layer in the sliding door assembly and the second shielding layer in the wall surface of the shielding body form nuclear radiation shielding for the side surface and the bottom surface of the movable cylinder body, and the shielding and sealing for the fuel rod to be inspected in the movable cylinder body are formed by combining the top cover of the movable cylinder body. When the sliding door assembly is in an opening state, the base is in butt joint with the movable hot chamber, the channel in the fuel rod transfer device is communicated with the channel of the movable hot chamber, the movable barrel is integrally taken out from the bottom end of the base and enters the movable hot chamber, in the transfer process, the top covers of the first shielding layer, the second shielding layer and the movable barrel can also shield nuclear radiation of a fuel rod to be inspected, the fuel rod to be inspected is transferred to the modularized movable hot chamber from the water pool, enough shielding layers are always arranged around the fuel rod, and operation under an open radiation condition is avoided.
As a preferred embodiment of the sliding door assembly, the sliding door assembly comprises two symmetrically arranged sliding doors, the sliding doors comprise a shell, and the first shielding layer is arranged inside the shell. The sliding door assembly preferably comprises two sliding doors arranged symmetrically, and the centers of symmetry of the two sliding doors are preferably located on the central axis of the passage. Through the arrangement, when the closed state and the open state are switched, the travel of the two sliding doors is shorter than that of one sliding door, so that the state switching is facilitated. The inside hollow structure that is of casing, hollow structure packs in the first shielding layer.
Further, the casing includes bottom plate and roof, be provided with riser, contact plate and two symmetrical curb plates that set up between bottom plate and the roof, two curb plates and the inner wall contact of base. Preferably, the bottom plate, the top plate, the vertical plate, the contact plate and the two symmetrical side plates of the shell are connected together by welding to form a closed space for accommodating the first shielding layer. In some embodiments, the contact plates of the two sliding doors are tightly attached in the closed state to achieve complete nuclear radiation shielding of the bottom of the movable cylinder, and in this embodiment, the contact plates are provided with drainage grooves which can drain water in the movable cylinder after the fuel rod transfer device is moved out of the water pool. In some embodiments, in order to facilitate the sliding of the sliding door, a handle located outside the base is arranged on a vertical plate of the sliding door. In some embodiments, the top plate and the bottom plate are designed to be Z-shaped to avoid injury to people due to gamma radiation transmitted from the gap.
As a preferable structure of the sliding door of the utility model, a horizontal supporting plate is arranged on the lower surface of the bottom plate, a horizontal rolling shaft is arranged on the horizontal supporting plate, and the horizontal rolling shaft is contacted with the inner walls of the bottom plate and the base; the outer wall of the side plate is provided with a vertical supporting plate, the vertical supporting plate is provided with a vertical rolling shaft, and the vertical rolling shaft is in contact with the inner walls of the side plate and the base. The horizontal supporting plate and the vertical supporting plate are respectively detachably arranged on the bottom plate and the two side plates in a threaded connection mode. A through groove is formed in the transverse supporting plate, at least one transverse rolling shaft is arranged in the through groove, and the transverse rolling shaft can rotate around the axis of the transverse rolling shaft; a through groove is formed in the vertical supporting plate, at least one vertical rolling shaft is arranged in the through groove, and the vertical rolling shaft can rotate around the axis of the vertical rolling shaft. Through the setting, sliding friction between the bottom plate and the base and between the side plates and the base is changed into rolling friction, so that friction force is greatly reduced, switching between states of the sliding door assembly is facilitated, and the sliding door assembly is prevented from being blocked in the base.
As another preferred structure of the sliding door of the present invention, the top plate is provided with a chute, and the chute is provided with at least two positioning holes; the shielding body is provided with a positioning assembly, the positioning assembly comprises a pressing plate fixed on the shielding body, a positioning pin shaft is arranged in the pressing plate in a sliding mode, a handle is installed at the top end of the positioning pin shaft, the bottom end of the positioning pin shaft can be inserted into a sliding groove or a positioning hole, a spring is sleeved on the outer wall of the positioning pin shaft, the upper end of the spring is connected with the bottom surface of the pressing plate, and the lower end of the spring is connected with the side wall of the positioning pin shaft.
The positioning component is matched with a sliding groove formed in the top plate so as to limit the stroke of the sliding door component. Specifically, at least two positioning holes are arranged in the sliding groove, the two positioning holes correspond to a fully closed state and a fully opened state respectively, contact plates of the fully closed sliding door are tightly attached to each other, and the fully opened sliding door is not in contact with the movable barrel. When the sliding door is in a fully closed state or a fully opened state, the bottom end of the positioning pin shaft of the positioning assembly extrudes the positioning hole under the action of the spring, and therefore the sliding door is prevented from sliding relative to the base. When needing to switch between two states, under the effect of external force, the handle overcomes the vertical upward movement of effort of spring, and the bottom of location round pin axle shifts out the locating hole, and the pulling sliding door is accomplished until the state switches, eliminates external force and makes the location round pin axle insert to the locating hole under the effect of spring in.
In some embodiments, more than two positioning holes may be provided to realize multi-point positioning of the sliding door according to actual requirements.
For the technical scheme that the sliding door assembly is arranged in the base, the bottom end of the positioning pin shaft sequentially penetrates through the shielding body and the base to be inserted into the positioning hole, and for the technical scheme that the sliding door assembly is arranged between the base and the shielding body, the bottom end of the positioning pin shaft penetrates through the shielding body and is inserted into the positioning hole. Preferably, the side wall of the positioning pin shaft is further provided with a limiting plate, and the limiting plate is connected with the bottom end of the spring.
Further, the contact plate is disposed obliquely. In order to ensure that the contact plates of the two sliding doors are tightly attached, the contact plates of the two sliding doors incline towards the same direction. Preferably, the angle of inclination of the contact plate is 60 °.
As a preferred embodiment of the movable barrel of the present invention, the movable barrel comprises a lower barrel, the bottom end of the lower barrel is an open end, a guide tube is arranged in the lower barrel, the guide tube is used for accommodating a fuel rod to be inspected, the top end of the lower barrel is connected with an upper barrel, a top cover is detachably arranged on the upper barrel, and the top of the top cover is provided with a bayonet hanging seat; the sliding door assembly is in a closed state, the top end of the fuel rod to be inspected is abutted to the lower surface of the top cover, and the bottom end of the fuel rod to be inspected is abutted to the upper surface of the sliding door assembly.
The movable cylinder body plays a role in sealing and protecting the fuel rod. The barrel includes barrel and lower barrel, and wherein, goes up the barrel and is used for installing the top cap, and the lower surface of top cap is laminated with the top of the fuel rod of examining under the closure state, and the preferred threaded connection of connected mode of top cap and last barrel, the bayonet socket that sets up on the top cap hang the seat and be convenient for grabbing device and snatch, and then remove the top cap, install on last barrel. The lower cylinder is mainly used for fixing and containing a fuel rod to be inspected, and a guide pipe is arranged in the lower cylinder, preferably, the guide pipe is an H68 copper pipe, the hardness of the copper pipe is less than that of Zr of a cladding material of the fuel rod, and mechanical damage to the fuel rod can be reduced in the transferring process. In the closed state, most of the fuel rods to be inspected are positioned inside the guide pipe, and the bottom ends of the fuel rods to be inspected are placed to be attached to the upper surface of the sliding door assembly. After the movable cylinder enters the modularized movable heat chamber through the channel, the open design at the lower end of the lower cylinder allows the manipulator of the modularized movable heat chamber to grab the fuel rod for inspection.
In some embodiments, a grid plate is further disposed in the lower cylinder, and the grid plate not only serves to fix the conduit, but also allows water in the lower cylinder to pass through.
In some embodiments, a rubber pad is arranged on the lower surface of the top cover, and the rubber pad can limit the fuel rod more firmly through self deformation.
In some embodiments, the bottom of the grid plate at the lowest layer is also provided with a connecting plate, and the connecting plate is connected with the grid plate through threads.
Furthermore, guide tubes are arranged at the top end and the bottom end of the guide tube. The diameter of the opening end of the guide tube is larger than that of the guide tube, so that the fuel rod can be conveniently put into the guide tube. Preferably, the material of the guide pipe is fluororubber.
As a preferred embodiment of the shielding body of the present invention, the shielding body includes an outer cylinder, an inner cylinder, a shielding body top cover and a shielding body bottom plate, the shielding body bottom plate is matched with the base to form a space for accommodating the sliding door assembly, the inner wall of the outer cylinder, the outer wall of the inner cylinder, the upper surface of the shielding body top cover and the lower surface of the shielding body top cover together form a closed space, and a second shielding layer is disposed in the closed space; the inner cylinder is provided with the passage.
Further, the outer wall of the outer cylinder is provided with a suspension trunnion.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. when the sliding door component is in a closed state, the upper end and the lower end of the movable cylinder body are respectively contacted with the upper top cover and the sliding door component, and the side wall of the movable cylinder body is contacted with the inner wall of the shielding body, so that the movable cylinder body can not move relative to the channel; meanwhile, the first shielding layer in the sliding door assembly and the second shielding layer in the wall surface of the shielding body form nuclear radiation shielding for the side surface and the bottom surface of the movable cylinder body, and form shielding and sealing for the fuel rod to be inspected in the movable cylinder body by combining with the top cover of the movable cylinder body; when the sliding door assembly is in an opening state, the base is in butt joint with the movable hot chamber, the channel in the fuel rod transfer device is communicated with the channel of the movable hot chamber, the whole movable barrel is taken out from the bottom end of the base and enters the movable hot chamber, and the first shielding layer, the second shielding layer and the top cover of the movable barrel can also shield nuclear radiation of a fuel rod to be inspected in a transfer process, so that the fuel rod to be inspected is transferred to the modularized movable hot chamber from a water pool, enough shielding layers are always arranged around the fuel rod, and the operation under an open radiation condition is avoided;
2. the sliding door of the utility model changes the sliding friction between the bottom plate and the base and between the side plate and the base into rolling friction by arranging the transverse supporting plate, the transverse rolling shaft, the vertical supporting plate and the vertical rolling shaft, thereby greatly reducing the friction force, facilitating the switching between the states of the sliding door assembly and avoiding the locking of the sliding door assembly in the base;
3. the utility model discloses a locating component has set up the stroke of sliding door with the matching of locating hole for switching between complete closed state and the complete open mode can be realized to the sliding door, has improved switching efficiency, has increased the convenience of operation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a side view of an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view taken along section A-A of FIG. 1;
FIG. 4 is a schematic cross-sectional view taken along section B-B of FIG. 1;
FIG. 5 is a schematic cross-sectional view taken along section C-C of FIG. 1;
FIG. 6 is a schematic cross-sectional view taken along section D-D of FIG. 1;
fig. 7 is a schematic structural view of a movable cylinder according to an embodiment of the present invention;
fig. 8 is a bottom view of the movable barrel according to an embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view taken along section E-E of FIG. 7;
fig. 10 is a schematic structural diagram of a shield according to an embodiment of the present invention;
FIG. 11 is a side view of a shield in an embodiment of the invention;
FIG. 12 is a top view of a shield according to an embodiment of the present invention;
FIG. 13 is a top view of a sliding door according to an embodiment of the present invention;
FIG. 14 is a cross-sectional view taken along section F-F of FIG. 13;
FIG. 15 is a schematic cross-sectional view taken along section G-G of FIG. 13;
FIG. 16 is a block diagram of the flow of fuel rods from a water basin to a modular mobile hot cell.
Reference numbers and corresponding part names in the drawings:
1-base, 2-sliding door, 21-vertical roller, 22-horizontal roller, 23-horizontal supporting plate, 24-vertical supporting plate, 25-shell, 251-bottom plate, 252-vertical plate, 253-top plate, 254-contact plate, 255-side plate, 26-first shielding layer, 27-handle, 3-shielding body, 31-shielding body bottom plate, 32-outer cylinder, 33-inner cylinder, 34-shielding body top cover, 35-second shielding layer, 36-baffle plate, 37-suspension shaft, 38-reinforcing plate, 4-upper top cover, 5-suspension ring screw, 6-movable cylinder, 61-lower cylinder, 62-upper cylinder, 63-guide pipe, 64-top cover, 65-bayonet suspension seat, 66-guide pipe, 67-rubber pad, 68-connecting plate, 69-lower grid plate, 70-middle grid plate, 71-upper grid plate, 8-positioning component, 81-handle, 82-positioning pin shaft, 83-pressing plate and 84-spring.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
In the description of the present invention, it should be understood that the terms "front", "back", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the present invention.
Example 1:
a fuel rod transfer device based on modular mobile heat chambers, as shown in fig. 1 and 2, comprises:
the bottom of the base 1 is matched with a channel of the modular mobile hot chamber;
the shielding body 3 is arranged above the base 1, a channel is arranged inside the shielding body 3, the top end of the channel penetrates through the top of the shielding body 3, and the bottom end of the channel penetrates through the bottom of the base 1;
an upper top cover 4 detachably mounted on the top of the shield body 3;
a movable cylinder 6 arranged in the channel, the movable cylinder 6 being for accommodating a fuel rod to be inspected;
the sliding door assembly comprises two sliding doors 2 symmetrically arranged between a base 1 and a shielding body 3, and each sliding door 2 comprises a shell 25; the sliding door assembly comprises a closed state and an open state, wherein the bottom end of the movable cylinder 6 is abutted against the upper surface of the sliding door 2 in the closed state, and the movable cylinder 6 can be taken out from the bottom end of the channel in the open state;
a first shield layer 26 provided inside the case 25;
and a second shield layer 35 provided on a wall surface of the shield 3.
In some embodiments, both sliding doors 2 are disposed inside the base 1.
In some embodiments, the top of the upper cover 4 is provided with an eyebolt 5, and the eyebolt 5 facilitates the detachment of the upper cover 4 from the shield 3.
In some embodiments, only one sliding door 2 may be provided, the sliding door 2 being capable of closing or opening the passage.
In some embodiments, the first and second shield layers 26, 35 are both filled lead.
Example 2:
as shown in fig. 6 and fig. 13 to 15, on the basis of embodiment 1, the housing 25 of the sliding door 2 includes a bottom plate 251 and a top plate 253, a vertical plate 252, a contact plate 254, and two symmetrically arranged side plates 255 are disposed between the bottom plate 251 and the top plate 253, and the two side plates 255 contact with the inner wall of the base 1.
In some embodiments, as shown in fig. 1, the contact plates 254 of the two sliding doors 2 are disposed obliquely, and the oblique directions and angles are the same. Preferably, the contact plate 254 is inclined at an angle of 60 °.
In some embodiments, to facilitate the sliding of the sliding door 2, a handle 27 located outside the base is provided on the riser 252 of the sliding door 2.
In some embodiments, to avoid the gamma radiation from the gap from transmitting to hurt the human, the top plate 253 and the bottom plate 251 are designed to be in a zigzag structure to match the shield 3 and the base 1.
In some embodiments, the contact plates 254 of the two sliding doors 2 are closely fitted in the closed state to achieve complete nuclear radiation shielding of the bottom of the movable barrel 6, and in this embodiment, the contact plates 254 are provided with drainage channels (not shown) that allow water in the movable barrel 6 to drain after the fuel rod transfer device is removed from the water pool.
Example 3:
as shown in fig. 6 and fig. 13-15, in embodiment 2, a transverse supporting plate 23 is mounted on the lower surface of the bottom plate 251, a transverse roller 22 is disposed on the transverse supporting plate 23, and the transverse roller 22 contacts with the bottom plate 251 and the inner wall of the base 1; the outer wall of the side plate 255 is provided with a vertical supporting plate 24, the vertical supporting plate 24 is provided with a vertical roller 21, and the vertical roller 21 is in contact with the side plate 255 and the inner wall of the base 1.
Through the setting, sliding friction between the bottom plate and the base and between the side plates and the base is changed into rolling friction, so that friction force is greatly reduced, switching between states of the sliding door assembly is facilitated, and the sliding door assembly is prevented from being blocked in the base.
Example 4:
on the basis of the above embodiments, as shown in fig. 3, 5 and 13, the top plate 253 is provided with a sliding slot, and two positioning holes are arranged in the sliding slot; the shielding body 3 is provided with a positioning assembly 8, the positioning assembly 8 comprises a pressing plate 83 fixed on the shielding body 3, a positioning pin shaft 82 is arranged in the pressing plate 83 in a sliding mode, a handle 81 is installed at the top end of the positioning pin shaft 82, the bottom end of the positioning pin shaft 82 can be inserted into a sliding groove or a positioning hole, a spring 84 is sleeved on the outer wall of the positioning pin shaft 82, the upper end of the spring 84 is connected with the bottom surface of the pressing plate 83, and the lower end of the spring 84 is connected with the side wall of the positioning pin shaft 82.
The two positioning holes correspond to a fully closed state and a fully opened state respectively, contact plates of the fully closed sliding door are tightly attached to each other, and the fully opened sliding door is not in contact with the movable barrel. When the sliding door is in a fully closed state or a fully opened state, the bottom end of the positioning pin shaft of the positioning assembly extrudes the positioning hole under the action of the spring, and therefore the sliding door is prevented from sliding relative to the base. When needing to switch between two states, under the effect of external force, the handle overcomes the vertical upward movement of effort of spring, and the bottom of location round pin axle shifts out the locating hole, and the pulling sliding door is accomplished until the state switches, eliminates external force and makes the location round pin axle insert to the locating hole under the effect of spring in.
In some embodiments, more than two positioning holes may be provided to realize multi-point positioning of the sliding door according to actual requirements.
In some embodiments, as shown in fig. 5, a limit plate is further disposed on the sidewall of the positioning pin, and the limit plate is connected to the bottom end of the spring 84.
Example 5:
on the basis of the above embodiment, as shown in fig. 7 to 9, the movable cylinder 6 includes a lower cylinder 61, the bottom end of the lower cylinder 61 is an open end, a guide tube 63 is disposed in the lower cylinder 61, the guide tube 63 is used for accommodating a fuel rod to be inspected, the top end of the lower cylinder 61 is connected with an upper cylinder 62, a top cover 64 is detachably disposed on the upper cylinder 62, and a bayonet hanging seat 65 is disposed at the top of the top cover 64; when the sliding door assembly is in a closed state, the top end of the fuel rod to be inspected is abutted against the lower surface of the top cover 64, and the bottom end of the fuel rod to be inspected is abutted against the upper surface of the sliding door assembly; guide tubes 66 are mounted on both the top and bottom ends of the guide tube 63.
In some embodiments, the guide tubes 63 are selected from H68 copper tubes, which have a hardness less than the hardness of the Zr cladding material of the fuel rod to reduce mechanical damage to the fuel rod during transport.
In some embodiments, the guide tube 66 is made of viton.
In some embodiments, the lower barrel 61 is provided with an upper grid plate 71, a middle grid plate 70 and a lower grid plate 69 from top to bottom, and the guide tube 66 is provided on the upper grid plate 71 and the lower grid plate 69.
In some embodiments, the bottom of lower grid 69 is further provided with a connecting plate 68, the connecting plate 68 is connected with the lower grid 69 through threads, and the guide tube 66 at the bottom of the guide tube 63 is arranged on the lower grid 69.
In some embodiments, a rubber pad 67 is disposed on the lower surface of the top cover 64, and the rubber pad 67 can be deformed by itself to more firmly limit the fuel rod.
Example 6:
on the basis of the above embodiments, as shown in fig. 10 to 12, the shield 3 includes an outer cylinder 32, an inner cylinder 33, a shield top cover 34 and a shield bottom plate 31, the shield bottom plate 31 cooperates with the base 1 to form a space for accommodating the sliding door assembly, an inner wall of the outer cylinder 32, an outer wall of the inner cylinder 33, an upper surface of the shield top cover 34 and a lower surface of the shield top cover 34 together form a closed space, and a second shield layer 35 is disposed in the closed space; the passage is arranged inside the inner cylinder 33; the outer wall of the outer cylinder 32 is provided with a suspension shaft 37.
As shown in fig. 10, in some embodiments, a reinforcing plate 38 is fixed on the outer wall of the outer cylinder 32, a suspension shaft 37 is fixed on the reinforcing plate 38, and a baffle 36 is further disposed on the suspension shaft 37. The suspension shaft 37 facilitates the suspension and turning of the fuel rod transfer device, and the setting position thereof is determined according to the gravity center position of the fuel rod transfer device.
Example 7:
as shown in fig. 16, the process flow of fuel rods from the water pool to the modular mobile hot cell includes the following steps:
(A) the fuel rod transfer device is hoisted into the water pool: taking out the top cover 64 on the movable cylinder 6, and hoisting the fuel rod transfer device into the water pool by using a crane and a special hoisting tool;
(B) the fuel rod is loaded into the fuel rod transfer device: grabbing a single fuel rod by using a fuel rod grabbing device, and inserting the fuel rod into the guide pipe 63 by means of the guide pipe 66 in the movable cylinder 6; the special gripping device is connected with the bayonet hanging seat 65, and the top cover 64 is hung into the water pool and is arranged on the upper cylinder 62;
(C) the fuel rod transfer device is hoisted out of the pool: the fuel rod transfer device is lifted out of the pool by a crane and a special lifting appliance, and water is drained through drainage grooves on the contact plates 254 of the two sliding doors 2;
(D) fuel rod transfer device closing cap: hoisting the fuel rod transfer device to a mounting bracket, firstly mounting a connecting bolt of a top cover 64 and a movable barrel upper barrel 62, and then mounting an upper top cover 4 on the shielding body 3 through bolt connection;
(E) overturning the fuel rod transfer device: turning over the fuel rod transfer device by using the two suspension trunnions 37 on the shielding body 3 to change the fuel rod transfer device from a vertical state to a horizontal state;
(F) butt-joint modular mobile hot chamber: horizontally placing the fuel rod transfer device on the butt joint device, and enabling the base 1 of the fuel rod transfer device to be in butt joint with the modular moving hot chamber side transfer channel through the movement of the butt joint device;
(G) opening a transfer channel: the positioning pin shaft 82 is pulled open, the sliding door 2 is opened within a specified stroke, and the modular moving hot chamber transfer passage is opened.
(H) Fuel rod feeding into modular mobile hot chamber: the movable cylinder 6 is fed into the modularized movable heat chamber through a channel by using a special gripping device connected with the bayonet hanging seat 65, the lower end of the movable cylinder 6 is open, and the manipulator of the modularized movable heat chamber is used for gripping the fuel rod for inspection.
The reverse process flow above was used to transfer the fuel rods from the modular moving hot cell back to the water pool.
The utility model designs the storage structure of the fuel rod by taking the fuel rod as the transfer object, thereby ensuring that the fuel rod is not damaged in the transfer process; a reasonable packaging structure is designed, so that the fuel rod is ensured to be closed in the transfer process; an enough shielding layer is designed to ensure the radiation protection safety of personnel; a reasonable butt joint structure is designed, so that the fuel rod is always provided with enough shielding layers in the process of feeding the fuel rod into the modularized movable hot chamber with the thickness of the shielding layer, and the operation under the open radiation condition is avoided. The transfer implementation process of the fuel rod transfer container is reasonable and feasible, meets the field implementation conditions, has strong applicability, can be repeatedly used, and improves the utilization rate of equipment.
As used herein, "first", "second", etc. (e.g., first shield layer, second shield layer) are used only to distinguish the respective components for clarity of description, and are not intended to limit any order or to emphasize importance, etc. Further, the term "connected" used herein may be either directly connected or indirectly connected via other components without being particularly described.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A fuel rod transfer device based on a modular mobile heat cell, comprising:
a base (1), the bottom of the base (1) is matched with the channel of the modular mobile heat chamber;
the shielding body (3) is arranged above the base (1), a channel is arranged inside the shielding body (3), the top end of the channel penetrates through the top of the shielding body (3), and the bottom end of the channel penetrates through the bottom of the base (1);
the upper top cover (4) is detachably mounted on the top of the shielding body (3);
a movable cylinder (6) arranged in the channel, the movable cylinder (6) being intended to accommodate a fuel rod to be inspected;
the sliding door assembly comprises a closed state and an opened state, the bottom end of the movable cylinder (6) abuts against the upper surface of the sliding door assembly in the closed state, and the movable cylinder (6) can be taken out from the bottom end of the channel in the opened state;
a first shield layer (26) disposed within the sliding door assembly;
and a second shield layer (35) provided on the wall surface of the shield (3).
2. The fuel rod transfer device based on the modular mobile hot cell as claimed in claim 1, characterized in that the sliding door assembly comprises two symmetrically arranged sliding doors (2), the sliding doors (2) comprising a housing (25), the first shielding layer (26) being arranged inside the housing (25).
3. The fuel rod transfer device based on the modular mobile hot cell as claimed in claim 2, characterized in that the housing (25) comprises a bottom plate (251) and a top plate (253), a riser (252), a contact plate (254) and two symmetrically arranged side plates (255) are arranged between the bottom plate (251) and the top plate (253), and the two side plates (255) are in contact with the inner wall of the base (1).
4. The fuel rod transfer device based on the modular mobile hot cell as claimed in claim 3, characterized in that a cross supporting plate (23) is mounted on the lower surface of the bottom plate (251), a cross roller (22) is arranged on the cross supporting plate (23), and the cross roller (22) is in contact with the bottom plate (251) and the inner wall of the base (1); the outer wall of the side plate (255) is provided with a vertical supporting plate (24), a vertical rolling shaft (21) is arranged on the vertical supporting plate (24), and the vertical rolling shaft (21) is in contact with the inner walls of the side plate (255) and the base (1).
5. The fuel rod transfer device based on the modular mobile hot cell as claimed in claim 3, wherein the top plate (253) is provided with a sliding groove, and at least two positioning holes are arranged in the sliding groove; be provided with locating component (8) on shield (3), locating component (8) are including fixing clamp plate (83) on shield (3), it is provided with locating pin axle (82) to slide in clamp plate (83), handle (81) are installed on locating pin axle (82) top, and locating pin axle (82) bottom can insert to spout or locating hole in, and the cover is equipped with spring (84) on the outer wall of locating pin axle (82), spring (84) upper end is connected with the bottom surface of clamp plate (83), and the lower extreme of spring (84) is connected with the lateral wall of locating pin axle (82).
6. The fuel rod transfer device based on the modular mobile heat chamber as claimed in any one of claims 3 to 5, characterized in that the contact plates (254) are arranged obliquely.
7. The fuel rod transfer device based on the modular mobile hot chamber is characterized in that the movable cylinder (6) comprises a lower cylinder (61), the bottom end of the lower cylinder (61) is an open end, a guide pipe (63) is arranged in the lower cylinder (61), the guide pipe (63) is used for accommodating a fuel rod to be checked, the top end of the lower cylinder (61) is connected with an upper cylinder (62), a top cover (64) is detachably arranged on the upper cylinder (62), and a bayonet hanging seat (65) is arranged at the top of the top cover (64); the sliding door assembly is in a closed state, the top end of the fuel rod to be inspected is abutted against the lower surface of the top cover (64), and the bottom end of the fuel rod to be inspected is abutted against the upper surface of the sliding door assembly.
8. The fuel rod transfer device based on the modular mobile heat chamber as claimed in claim 7, characterized in that guide tubes (66) are mounted on the top and bottom ends of the guide tube (63).
9. The fuel rod transfer device based on the modular mobile hot cell as claimed in claim 1, characterized in that the shield (3) comprises an outer cylinder (32), an inner cylinder (33), a shield top cover (34) and a shield bottom plate (31), the shield bottom plate (31) is matched with the base (1) to form a space for accommodating the sliding door assembly, the inner wall of the outer cylinder (32), the outer wall of the inner cylinder (33), the upper surface of the shield top cover (34) and the lower surface of the shield top cover (34) together form a closed space, and a second shield layer (35) is arranged in the closed space; the passage is provided inside the inner cylinder (33).
10. The fuel rod transfer device based on the modular mobile hot cell as claimed in claim 9, characterized in that the outer wall of the outer cylinder (32) is provided with a suspension shaft (37).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921566191.2U CN210722485U (en) | 2019-09-19 | 2019-09-19 | Fuel rod transfer device based on modular movable hot chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921566191.2U CN210722485U (en) | 2019-09-19 | 2019-09-19 | Fuel rod transfer device based on modular movable hot chamber |
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| Publication Number | Publication Date |
|---|---|
| CN210722485U true CN210722485U (en) | 2020-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921566191.2U Active CN210722485U (en) | 2019-09-19 | 2019-09-19 | Fuel rod transfer device based on modular movable hot chamber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227473A1 (en) * | 2020-10-14 | 2021-11-18 | 中广核工程有限公司 | Protective base for transfer container for spent fuel dry storage |
| CN113936826A (en) * | 2021-10-13 | 2022-01-14 | 中国工程物理研究院核物理与化学研究所 | High-power fuel rod temperature control irradiation device |
-
2019
- 2019-09-19 CN CN201921566191.2U patent/CN210722485U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227473A1 (en) * | 2020-10-14 | 2021-11-18 | 中广核工程有限公司 | Protective base for transfer container for spent fuel dry storage |
| CN113936826A (en) * | 2021-10-13 | 2022-01-14 | 中国工程物理研究院核物理与化学研究所 | High-power fuel rod temperature control irradiation device |
| CN113936826B (en) * | 2021-10-13 | 2023-05-05 | 中国工程物理研究院核物理与化学研究所 | High-power fuel rod temperature control irradiation device |
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