CN113744908A - Device, system and method for filling helium into fuel rod pressure plug - Google Patents
Device, system and method for filling helium into fuel rod pressure plug Download PDFInfo
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- CN113744908A CN113744908A CN202110777781.5A CN202110777781A CN113744908A CN 113744908 A CN113744908 A CN 113744908A CN 202110777781 A CN202110777781 A CN 202110777781A CN 113744908 A CN113744908 A CN 113744908A
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- fuel rod
- cavity
- plug
- opening
- sealing
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- 239000000446 fuel Substances 0.000 title claims abstract description 125
- 239000001307 helium Substances 0.000 title claims abstract description 71
- 229910052734 helium Inorganic materials 0.000 title claims abstract description 71
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 108
- 230000007246 mechanism Effects 0.000 claims abstract description 56
- 239000008188 pellet Substances 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000007665 sagging Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 4
- 238000005253 cladding Methods 0.000 description 15
- 241000446313 Lamella Species 0.000 description 7
- 238000005086 pumping Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C21/00—Apparatus or processes specially adapted to the manufacture of reactors or parts thereof
- G21C21/02—Manufacture of fuel elements or breeder elements contained in non-active casings
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a device, a system and a method for helium filling of a fuel rod pressure plug, wherein the device comprises: the sealing cavity and the plug pressing mechanism; the sealing cavity is provided with a first opening and a second opening which are communicated with the sealing cavity, one end of the fuel rod to be inflated can extend into the sealing cavity through the first opening, the plug pressing mechanism is arranged on one side of the sealing cavity corresponding to the second opening and used for clamping the end plug and can slide along the axial direction of the fuel rod, so that one end of the end plug is clamped by the plug pressing mechanism and extends into the sealing cavity through the second opening until the end plug is pressed into the fuel rod; the sealed cavity is provided with a first sealing structure and a second sealing structure which are respectively used for sealing the first opening and the second opening, and the sealed cavity is provided with an air inlet and exhaust nozzle communicated with the sealed cavity and used for being connected with a vacuumizing device to exhaust air in the sealed cavity or a helium device to fill helium into the sealed cavity. The device has simple structure and controllable process, and can complete helium filling and plug pressing operations of MOX fuel rods with various specifications.
Description
Technical Field
The invention particularly relates to a device, a system and a method for filling helium in a fuel rod pressure plug.
Background
The main component of the nuclear fuel element used in the fast neutron reactor is a fuel rod, and the fuel rod comprises a cladding tube, a pellet, an upper end plug, a lower end plug and the like.
After the operation of loading pellets into the fuel rod is finished, helium is filled into the fuel rod to avoid pellet oxidation, then the end plug is pressed into the cladding tube to seal the fuel rod, and the pressure and the volume ratio of the helium in the cladding tube meet requirements.
At present, the existing pressurized water fuel rod in China is sealed in a helium filling mode after an end plug is pressed, helium is filled into a cladding tube through a center hole of the end plug, and the MOX fuel rod end plug is provided with a groove and needs to be filled with helium firstly and then is plugged, so that an end plug plugging mechanism suitable for the pressurized water fuel rod is not suitable for the MOX fuel rod. Moreover, the two methods are different in helium filling mode and requirements, and a pressure plug helium filling device suitable for MOX fuel rods needs to be developed.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and provides a device suitable for filling helium by pressing and plugging MOX fuel rods, a system with the device and a method for filling helium by pressing and plugging the fuel rods by using the system.
The technical scheme adopted for solving the technical problem of the invention is as follows:
the invention provides a fuel rod pressure plug helium filling device, which comprises: the sealing cavity and the plug pressing mechanism;
the seal cavity is provided with a seal cavity, the seal cavity is provided with a first opening and a second opening which are communicated with the seal cavity, the first opening and the second opening are respectively arranged at the two ends of the seal cavity along the axial direction of the fuel rod,
the end of the fuel rod to be inflated can extend into the sealed chamber through the first opening,
the plug pressing mechanism is arranged on one side of the sealing cavity corresponding to the second opening, is used for clamping the end plug and can slide along the axial direction of the fuel rod, so that one end of the clamping end plug extends into the sealing cavity through the second opening until the end plug is pressed into the fuel rod;
the sealing cavity is provided with a first sealing structure and a second sealing structure, the first sealing structure is used for sealing the first opening after one end of the fuel rod to be inflated extends into the sealing cavity,
the second sealing structure is used for sealing the second opening after one end clamped by the plug pressing mechanism extends into the sealing cavity,
and the sealed cavity is provided with an air inlet and outlet nozzle communicated with the sealed cavity and used for being connected with a vacuumizing device to discharge air in the sealed cavity or connected with a helium device to charge helium into the sealed cavity.
Optionally, the clamping mechanism is arranged on one side of the sealed cavity corresponding to the first opening, and is used for guiding the fuel rod into the sealed cavity and clamping one end, provided with the pellets, of the fuel rod after the fuel rod enters the sealed cavity.
Optionally, the clamping mechanism includes a clamping body and a first cylinder, the clamping body includes a first clamping flap and a second clamping flap, and the first cylinder is connected to the second clamping flap for driving the second clamping flap to approach the first clamping flap, so that a clamping cavity for accommodating the fuel rod is formed between the first clamping flap and the second clamping flap.
Optionally, the fuel rod clamping device further comprises a riding wheel mechanism, wherein the riding wheel mechanism is arranged between the clamping mechanism and the sealing cavity and used for supporting one end of the fuel rod to be inflated so as to prevent the end from sagging before entering the sealing cavity.
Optionally, the first sealing structure is an inflatable sealing ring, the inflatable sealing ring is arranged in the first opening and can be used for the fuel rod to pass through, and an air inlet used for connecting an external compressed air source is arranged on the inflatable sealing ring.
Optionally, still include the end plate, the end plate can be dismantled and connect in the one end that seal chamber body and first opening correspond for compress tightly the physiosis sealing washer in first opening.
Optionally, the plunger mechanism comprises a second cylinder and a plunger rod, one end of the plunger rod is connected with the second cylinder, the other end of the plunger rod is used for installing an end plug, and the second cylinder is used for driving the plunger rod to slide along the axial direction of the fuel rod.
Optionally, the corking mechanism further comprises a pressure sensor, and the pressure sensor is arranged between the second cylinder and the corking rod and is used for monitoring the corking force of the corking rod.
The invention also provides a fuel rod pressure plug helium filling system which comprises a vacuumizing device, a helium device and the fuel rod pressure plug helium filling device.
The invention also provides a method for filling helium in a fuel rod by using the device, which comprises the following steps:
s1: sending one end of the fuel rod to be inflated into the sealed cavity of the fuel rod through the first opening of the sealed cavity, sliding the plug pressing mechanism towards the sealed cavity, so that one end of the plug clamping end of the fuel rod extends into the sealed cavity of the fuel rod through the second opening of the sealed cavity, sealing the first opening by using a first sealing structure, and sealing the second opening by using a second sealing structure;
s2: connecting an air inlet and exhaust nozzle on the sealed cavity with a vacuumizing device, and starting the vacuumizing device to exhaust air in the sealed cavity;
s3: connecting an air inlet and outlet nozzle on the sealed cavity with a helium device, and starting the helium device to fill helium into the sealed cavity and the fuel rod;
s4: the press plug mechanism slides towards the seal cavity to press the end plug into the fuel rod.
According to the invention, by designing a sealing cavity structure with two openings and designing a plug pressing mechanism capable of moving along the axial direction of a fuel rod, the fuel rod extends into the sealing cavity through one opening, an end plug extends into the sealing cavity through the other opening by the plug pressing mechanism, and the sealing structure seals the two openings, so that the helium filling operation on the fuel rod can be completed by firstly vacuumizing and then filling helium into the sealing cavity; and finally, continuously pushing the end plug through the plug pressing mechanism until the end plug is pressed into the fuel rod, thereby completing the operation of pressing the fuel rod. The device has simple structure and controllable process, and can complete helium filling and plug pressing operations of fuel rods with various specifications.
Drawings
Fig. 1 is a schematic perspective view of a fuel rod pressure plug helium filling device provided in embodiment 1 of the present invention;
FIG. 2 is a schematic perspective view of a sealed chamber;
fig. 3 is a schematic sectional structure diagram of the seal cavity and the plug mechanism.
In the figure: 1. a base plate; 2. a second cylinder; 3. a pressure sensor; 4. a transition block; 5. a plug pressing rod; 6. sealing the chamber; 7. a clamping body; 8. a first cylinder; 9. a fuel rod; 10. a window; 11. an air inlet and outlet; 12. sealing the cavity; 13. an air inlet; 14. an end plate; 15. a riding wheel mechanism; 16. a position sensor; 17. a first seal structure; 18. a second seal structure; 19. an end plug; 20. a guide rail.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.
In the description of the present invention, it should be noted that the indication of orientation or positional relationship, such as "on" or the like, is based on the orientation or positional relationship shown in the drawings, and is only for convenience and simplicity of description, and does not indicate or imply that the device or element referred to must be provided with a specific orientation, constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected," "disposed," "mounted," "fixed," and the like are to be construed broadly, e.g., as being fixedly or removably connected, or integrally connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
The invention provides a fuel rod pressure plug helium filling device, which comprises: the sealing cavity and the plug pressing mechanism;
the seal cavity is provided with a seal cavity, the seal cavity is provided with a first opening and a second opening which are communicated with the seal cavity, the first opening and the second opening are respectively arranged at the two ends of the seal cavity along the axial direction of the fuel rod,
the end of the fuel rod to be inflated can extend into the sealed chamber through the first opening,
the plug pressing mechanism is arranged on one side of the sealing cavity corresponding to the second opening, is used for clamping the end plug and can slide along the axial direction of the fuel rod, so that one end of the clamping end plug extends into the sealing cavity through the second opening until the end plug is pressed into the fuel rod;
the sealing cavity is provided with a first sealing structure and a second sealing structure, the first sealing structure is used for sealing the first opening after one end of the fuel rod to be inflated extends into the sealing cavity,
the second sealing structure is used for sealing the second opening after one end clamped by the plug pressing mechanism extends into the sealing cavity,
and the sealed cavity is provided with an air inlet and outlet nozzle communicated with the sealed cavity and used for being connected with a vacuumizing device to discharge air in the sealed cavity or connected with a helium device to charge helium into the sealed cavity.
The invention also provides a fuel rod pressure plug helium filling system which comprises a vacuumizing device, a helium device and the fuel rod pressure plug helium filling device.
The invention also provides a method for filling helium in a fuel rod by using the device, which comprises the following steps:
s1: sending one end of the fuel rod to be inflated into the sealed cavity of the fuel rod through the first opening of the sealed cavity, sliding the plug pressing mechanism towards the sealed cavity, so that one end of the plug clamping end of the fuel rod extends into the sealed cavity of the fuel rod through the second opening of the sealed cavity, sealing the first opening by using a first sealing structure, and sealing the second opening by using a second sealing structure;
s2: connecting an air inlet and exhaust nozzle on the sealed cavity with a vacuumizing device, and starting the vacuumizing device to exhaust air in the sealed cavity;
s3: connecting an air inlet and outlet nozzle on the sealed cavity with a helium device, and starting the helium device to fill helium into the sealed cavity and the fuel rod;
s4: the press plug mechanism slides towards the seal cavity to press the end plug into the fuel rod.
Example 1:
as shown in fig. 1 to 3, the present embodiment provides a fuel rod pressure plug helium filling device, including: a seal cavity 12 and a plug pressing mechanism;
the seal cavity 12 is provided with a seal cavity 6, the seal cavity 12 is provided with a first opening and a second opening which are communicated with the seal cavity 6, the first opening and the second opening are respectively arranged at the two ends of the seal cavity 12 along the axial direction of the fuel rod 9,
the end of the fuel rod 9 to be charged can project through the first opening into the sealed chamber 6,
the plug pressing mechanism is arranged on one side of the seal cavity 12 corresponding to the second opening, is used for clamping the end plug 19, and can slide along the axial direction of the fuel rod 9, so that one end of the end plug 19 clamped by the plug pressing mechanism extends into the seal cavity 6 through the second opening until the end plug 19 is pressed into the fuel rod 9;
the sealing cavity 12 is provided with a first sealing structure 17 and a second sealing structure 18, the first sealing structure 17 is used for sealing the first opening after the end of the fuel rod 9 to be inflated extends into the sealing cavity 6,
the second sealing means 18 is adapted to seal the second opening after one end of the corking mechanism grip 19 has been extended into the sealed chamber 6,
the sealed cavity 12 is provided with an air inlet and outlet nozzle 11 communicated with the sealed cavity 6, and is used for being connected with a vacuum pumping device to exhaust air in the sealed cavity 6 or connected with a helium device to fill helium into the sealed cavity 6.
Therefore, by designing a sealing cavity structure with two openings and designing a plug pressing mechanism capable of moving along the axial direction of the fuel rod, the fuel rod extends into the sealing cavity through one opening, the plug pressing mechanism extends an end plug into the sealing cavity through the other opening, and the sealing structure seals the two openings, so that the helium filling operation on the fuel rod can be completed by firstly vacuumizing and then filling helium into the sealing cavity; and finally, continuously pushing the end plug through the plug pressing mechanism until the end plug is pressed into the fuel rod, thereby completing the operation of pressing the fuel rod. The device has simple structure and controllable process, and can complete helium filling and plug pressing operations of fuel rods with various specifications.
In this embodiment, the fuel rod clamping device further includes a clamping mechanism, the clamping mechanism is disposed on a side of the sealed cavity 12 corresponding to the first opening, and is configured to guide the fuel rod 9 into the sealed cavity 6, and clamp an end of the fuel rod 9, where the pellet is mounted, after the fuel rod 9 enters the sealed cavity 6.
In this embodiment, fixture includes centre gripping body 7 and first cylinder 8, and centre gripping body 7 includes first centre gripping lamella and second centre gripping lamella, and first cylinder 8 links to each other with the second centre gripping lamella for drive second centre gripping lamella is close to first centre gripping lamella, so that form the centre gripping chamber that holds fuel rod 9 between first centre gripping lamella and the second centre gripping lamella.
The clamping body 7 is driven by the air cylinder, so that the clamping of the fuel rod cladding tube can be realized, and the position stability of the cladding tube during the pressing is ensured.
In this embodiment, a roller mechanism 15 is further included, and the roller mechanism 15 is disposed between the clamping mechanism and the seal cavity 12 and is used for supporting one end of the fuel rod 9 to be inflated so as to prevent the end from sagging before entering the seal cavity 6.
Next, the riding wheel mechanism 15 is provided with a position sensor 16, the fuel rod 9 is provided with a position sensing piece, and when the fuel rod 9 moves to the position sensing piece and corresponds to the position sensor 16, the position sensor 16 sends out a signal.
In this embodiment, the first sealing structure 17 is an inflatable sealing ring, the inflatable sealing ring is disposed in the first opening and can be passed by the fuel rod 9, and an air inlet 13 for connecting an external compressed air source is disposed on the inflatable sealing ring.
In this embodiment, the sealing device further includes an end plate 14, where the end plate 14 is detachably connected to an end of the sealing cavity 12 corresponding to the first opening, and is used to compress the inflatable sealing ring in the first opening.
In this embodiment, the plug mechanism includes second cylinder 2 and plug rod 5, and the one end of plug rod 5 links to each other with second cylinder 2, and the other end is used for installing end plug 19, and second cylinder 2 is used for driving plug rod 5 and slides along fuel rod 9 axial direction.
Specifically, on second cylinder 2, centre gripping body 7, first cylinder 8 and seal chamber 12 all located a bottom plate 1, be equipped with guide rail 20 on the bottom plate 1, guide rail 20 arranged along the axial direction of fuel rod 9, on the stopper rod 5 wears to locate a transition piece 4, transition piece 4 cunning is located on guide rail 20 to make stopper rod 5 along guide rail 20 linear motion.
In this embodiment, the tamponade mechanism further includes a pressure sensor 3, and the pressure sensor 3 is disposed between the second cylinder 2 and the tamponade rod 5, and is used for monitoring the tamponade force of the tamponade rod 5.
In addition, the upper end of the sealed cavity 12 is provided with a window 10, so that the plugging condition of the end plug 19 can be observed at any time.
Specifically, the method comprises the following steps:
as shown in fig. 1 and 2, the cladding tube of the fuel rod 9 is fed and passes through the clamping body 7 to reach the riding wheel 15, and is further fed after being corrected by the riding wheel 15, when the end part of the cladding tube 9 reaches the position sensor 16, the position sensor 16 sends out a signal, a cladding tube feeding mechanism (not shown) receives the signal and continues to feed for a fixed distance by taking the position as a starting point, and the end part of the cladding tube of the fuel rod 9 to be filled with helium enters a designated position in the sealed cavity 12.
As shown in fig. 3, the seal chamber 12 is fitted with an inflatable seal (first seal 17) which is compressed by the end plate 14. The cladding tube of the fuel rod 9 passes through the inflatable sealing ring and enters the sealing cavity 12, the air inlet 13 is connected with external compressed air, and the compressed air enters the inflatable sealing ring from the air inlet 13, so that the cladding tube is clamped to play a role in sealing.
As shown in fig. 3, the end plug 19 is disposed on the plunger rod 5, the plunger rod 5 is driven by the second cylinder 2 to be fed into the seal cavity 12, and the plunger rod 5 and the seal cavity 12 are sealed by the second seal structure 18 (seal ring).
As shown in fig. 2, the vacuum-pumping device performs vacuum-pumping operation on the inside of the sealed cavity 12 through the air inlet and outlet 11, simultaneously performs vacuum-pumping on the inside of the cladding tube, then the vacuum system is closed, the helium-filling system sends helium gas into the sealed cavity 12 from the air inlet and outlet 11 and then enters the cladding tube, and the helium-filling is stopped when the pressure reaches the requirement.
As shown in fig. 1, the plug pressing rod 5 acts to press the end plug 19 into the cladding tube, the plug pressing rod 5 exits after maintaining pressure for a certain time, the pressure sensor 3 monitors the plug pressing force in real time in the plug pressing process, and the second cylinder 2 stops driving when the plug pressing force exceeds the limit value.
Example 2:
the embodiment provides a fuel rod pressure plug helium filling system, which comprises a vacuumizing device, a helium device and the fuel rod pressure plug helium filling device in the embodiment 1.
Example 3:
this example provides a method of fuel rod tamponade helium filling using the apparatus of example 1, comprising:
s1: one end of the fuel rod 9 to be inflated is fed into the sealing cavity 6 of the sealing cavity 12 through a first opening of the sealing cavity, the plug pressing mechanism slides towards the sealing cavity 12, so that one end of the plug pressing mechanism, which clamps the end plug 19, extends into the sealing cavity 6 of the sealing cavity 12 through a second opening of the sealing cavity, the first opening is sealed through a first sealing structure 17, and the second opening is sealed through a second sealing structure 18;
s2: connecting an air inlet and outlet nozzle 11 on the sealed cavity 12 with a vacuumizing device, and starting the vacuumizing device to exhaust air in the sealed cavity 6;
s3: connecting an air inlet and outlet nozzle 11 on the sealed cavity 12 with a helium device, and starting the helium device to fill helium into the sealed cavity 6 and the fuel rod 9;
s4: the press plug mechanism is slid towards the seal cavity 12 to press the end plug 19 into the fuel rod 9.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A fuel rod plug helium filling apparatus, comprising: a sealing cavity (12) and a plug pressing mechanism;
the seal cavity (12) is provided with a seal cavity (6), the seal cavity (12) is provided with a first opening and a second opening which are communicated with the seal cavity (6), the first opening and the second opening are respectively arranged at the two ends of the seal cavity (12) along the axial direction of the fuel rod (9),
one end of the fuel rod (9) to be inflated can extend into the sealing chamber (6) through the first opening,
the plug pressing mechanism is arranged on one side of the sealed cavity (12) corresponding to the second opening, is used for clamping the end plug (19) and can slide along the axial direction of the fuel rod (9), so that one end of the clamping end plug (19) extends into the sealed cavity (6) through the second opening until the end plug (19) is pressed into the fuel rod (9);
the sealing cavity (12) is provided with a first sealing structure (17) and a second sealing structure (18), the first sealing structure (17) is used for sealing the first opening after one end of the fuel rod (9) to be inflated extends into the sealing cavity (6),
the second sealing structure (18) is used for sealing the second opening after one end of the clamping (19) of the plug pressing mechanism extends into the sealing chamber (6),
and the sealed cavity (12) is provided with an air inlet and outlet nozzle (11) communicated with the sealed cavity (6) and used for being connected with a vacuumizing device to exhaust air in the sealed cavity (6) or a helium device to fill helium into the sealed cavity (6).
2. The fuel rod plug helium filling device according to claim 1, further comprising a clamping mechanism disposed on a side of the sealed cavity (12) corresponding to the first opening for guiding the fuel rod (9) into the sealed chamber (6) and clamping the end of the fuel rod (9) containing pellets after the fuel rod (9) enters the sealed chamber (6).
3. The fuel rod plug helium filling device according to claim 2, characterized in that the clamping means comprises a clamping body (7) and a first cylinder (8), the clamping body (7) comprising a first clamping lobe and a second clamping lobe, the first cylinder (8) being connected to the second clamping lobe for driving the second clamping lobe closer to the first clamping lobe so that a clamping cavity for accommodating the fuel rod (9) is formed between the first clamping lobe and the second clamping lobe.
4. A fuel rod plug helium-filling device according to any one of claims 1 to 3, further comprising an idler mechanism (15), said idler mechanism (15) being provided between the clamping mechanism and the seal chamber (12) for supporting the end of the fuel rod (9) to be filled with gas to prevent it from sagging before entering the seal chamber (6).
5. A fuel rod tamponade helium filling device as claimed in any one of claims 1 to 3, characterised in that the first sealing structure (17) is an inflatable sealing ring which is arranged in the first opening and through which the fuel rod (9) can pass, and on which an air inlet (13) for connection to an external compressed air source is arranged.
6. The fuel rod plug helium filling apparatus of claim 5, further comprising an end plate (14), wherein the end plate (14) is removably attached to an end of the seal cavity (12) corresponding to the first opening for compressing the inflatable seal ring within the first opening.
7. The fuel rod tamponade helium filling device according to any one of claims 1 to 3, characterized in that the tamponade mechanism comprises a second cylinder (2) and a tamponade rod (5), one end of the tamponade rod (5) is connected with the second cylinder (2) and the other end is used for installing an end plug (19), and the second cylinder (2) is used for driving the tamponade rod (5) to slide along the axial direction of the fuel rod (9).
8. The fuel rod tamponade helium filling device of claim 7, characterized in that the tamponade mechanism further comprises a pressure sensor (3), the pressure sensor (3) being provided between the second cylinder (2) and the tamponade rod (5) for monitoring the tamponade force of the tamponade rod (5).
9. A fuel rod plug helium filling system comprising an evacuation device, a helium device, and a fuel rod plug helium filling device as claimed in any one of claims 1 to 8.
10. A method of fuel rod tamponade helium filling using the device of any one of claims 1 to 8, comprising:
s1: one end of the fuel rod (9) to be inflated is fed into the sealing cavity (6) of the sealing cavity (12) through a first opening of the sealing cavity, the plug pressing mechanism slides towards the sealing cavity (12) so that one end of the plug clamping end plug (19) extends into the sealing cavity (6) through a second opening of the sealing cavity (12), the first opening is sealed through a first sealing structure (17), and the second opening is sealed through a second sealing structure (18);
s2: connecting an air inlet and exhaust nozzle (11) on the sealed cavity (12) with a vacuumizing device, and starting the vacuumizing device to exhaust air in the sealed cavity (6);
s3: connecting an air inlet and outlet nozzle (11) on the sealed cavity (12) with a helium device, and starting the helium device to fill helium into the sealed cavity (6) and the fuel rod (9);
s4: the press plug mechanism is slid towards the seal cavity (12) to press the end plug (19) into the fuel rod (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110777781.5A CN113744908B (en) | 2021-07-09 | 2021-07-09 | Helium filling device, system and method for fuel rod plug |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110777781.5A CN113744908B (en) | 2021-07-09 | 2021-07-09 | Helium filling device, system and method for fuel rod plug |
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| CN113744908A true CN113744908A (en) | 2021-12-03 |
| CN113744908B CN113744908B (en) | 2024-05-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115862916A (en) * | 2022-12-07 | 2023-03-28 | 中国原子能科学研究院 | Method for extracting krypton-85 from fast reactor spent fuel rods |
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| WO2010084122A1 (en) * | 2009-01-23 | 2010-07-29 | Nuclear Cargo + Service Gmbh | Method and arrangement for gas-tightly enclosing at least one fuel rod |
| CN105609147A (en) * | 2015-12-28 | 2016-05-25 | 中国原子能科学研究院 | System for helium charging and plug pressing of fuel rods of fast reactor |
| CN106531260A (en) * | 2016-11-25 | 2017-03-22 | 中核建中核燃料元件有限公司 | Fuel-rod end plug pressing machine and application method |
| CN206672648U (en) * | 2016-12-30 | 2017-11-24 | 中核建中核燃料元件有限公司 | A kind of fuel assembly guide pipe tamponade device |
| CN109585049A (en) * | 2018-12-29 | 2019-04-05 | 中核北方核燃料元件有限公司 | A kind of cladding tubes, which vacuumize, fills helium tamponade device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115862916A (en) * | 2022-12-07 | 2023-03-28 | 中国原子能科学研究院 | Method for extracting krypton-85 from fast reactor spent fuel rods |
| CN115862916B (en) * | 2022-12-07 | 2023-10-24 | 中国原子能科学研究院 | Method for extracting krypton-85 from fast reactor spent fuel rod |
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