CN115691853B - Irradiation target for research stack isotope irradiation production and assembly method - Google Patents
Irradiation target for research stack isotope irradiation production and assembly method Download PDFInfo
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- CN115691853B CN115691853B CN202211186103.2A CN202211186103A CN115691853B CN 115691853 B CN115691853 B CN 115691853B CN 202211186103 A CN202211186103 A CN 202211186103A CN 115691853 B CN115691853 B CN 115691853B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 33
- 238000011160 research Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 86
- 238000003466 welding Methods 0.000 claims description 26
- 238000005253 cladding Methods 0.000 claims description 24
- 239000012530 fluid Substances 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000002285 radioactive effect Effects 0.000 abstract description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052781 Neptunium Inorganic materials 0.000 abstract description 4
- LFNLGNPSGWYGGD-UHFFFAOYSA-N neptunium atom Chemical compound [Np] LFNLGNPSGWYGGD-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052759 nickel Inorganic materials 0.000 abstract description 4
- 230000005855 radiation Effects 0.000 abstract description 4
- 239000001307 helium Substances 0.000 description 7
- 229910052734 helium Inorganic materials 0.000 description 7
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 6
- 210000003205 muscle Anatomy 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001094 6061 aluminium alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005372 isotope separation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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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 embodiment of the invention provides an irradiation target for research of isotope irradiation production and an assembly method, comprising the following steps: the sleeve is sleeved on the outer side of the three-rib tubular outer target tube; the three-reinforcement-tube type outer target tube is sleeved outside the three-reinforcement-tube type inner target tube; and a three-rib tubular inner target tube sleeved outside the wringing tube; water gaps are formed in the inner side and the outer side of the three-rib tubular outer target tube; the inner side and the outer side of the three-rib pipe type inner target pipe are also provided with water gaps; the three-rib tubular outer target tube and the three-rib tubular inner target tube are respectively provided with a target tube inner cavity for accommodating the core body. The embodiment of the invention can be used for researching radiation production of the radioactive isotopes, and is suitable for radiation of nickel targets, neptunium targets and the like.
Description
Technical Field
The invention relates to an irradiation target for research of isotope irradiation production and an assembly method thereof.
Background
Radioisotopes are widely used in agriculture, industry, medicine, etc., such as 99m Tc is the most widely used medical imaging radionuclide worldwide, 14 c, preparing a carbon-made labeled compound for detection and tracing. Nuclear reactor production is one of the main production modes of radioactive isotopes, which involves placing target elements corresponding to the loaded target nuclides into a reactor for specific irradiationIn the pore canal, the target nuclide is generated through nuclear reaction after irradiation for a certain time in a neutron field of the reactor.
The irradiation target type is related to the reactor structure, the type of the isotope produced and the characteristics thereof, and the irradiation target not only ensures the safety of the thermodynamic structure of the target and the operation safety of the reactor, but also ensures the isotope yield and quality and is convenient for separating and purifying the isotope.
Disclosure of Invention
The embodiment of the invention provides an irradiation target piece for researching irradiation production of a stack radioisotope and an assembly method, which are used for researching irradiation production of the stack radioisotope and are suitable for irradiation of nickel targets, neptunium targets and the like.
The embodiment of the invention is realized by the following technical scheme:
in a first aspect, embodiments of the present invention provide an irradiation target for research stack isotope irradiation production, the target comprising:
the sleeve is sleeved on the outer side of the three-rib tubular outer target tube;
the three-reinforcement-tube type outer target tube is sleeved outside the three-reinforcement-tube type inner target tube; and
the three-rib pipe type inner target pipe is sleeved on the outer side of the wringing pipe;
water gaps are formed in the inner side and the outer side of the three-rib tubular outer target tube; the inner side and the outer side of the three-rib pipe type inner target pipe are also provided with water gaps; the three-rib tubular outer target tube and the three-rib tubular inner target tube are respectively provided with a target tube inner cavity for accommodating the core body.
Further, the target further comprises: the upper end and the lower end are arranged at two ends of the target piece, and the throttling piece is arranged inside the lower end.
Further, the lower end head of the target is welded with the lower end of the sleeve; the upper end of the target is welded with a positioning tooth block, and the positioning tooth block is welded with the upper end of the sleeve; the positioning tooth block is used for fixing the three-reinforcement-tube type outer target tube, the three-reinforcement-tube type inner target tube and the water squeezing tube and guiding fluid to enter the water gaps of the three-reinforcement-tube type outer target tube and the three-reinforcement-tube type inner target tube.
Further, the thickness of the water gap at the inner side of the three-rib tubular outer target tube is larger than that at the outer side of the three-rib tubular outer target tube; the thickness of the water gap at the inner side and the outer side of the three-rib pipe type inner target pipe is the same.
Further, the sleeve is of a polygonal structure.
Further, three muscle tubular outer target pipe and three muscle tubular inner target pipe all include:
the three-rib type outer sleeve is sleeved on the outer side of the inner cladding tube, and a target tube inner cavity for accommodating the core body is arranged between the inner side of the three-rib type outer sleeve and the outer side of the inner cladding tube;
the two ends of the inner cladding tube are respectively provided with a target tube lower end and a target tube upper end; the vent hole is arranged at the upper end head of the target tube and communicated with the inner cavity of the target tube for introducing inert gas into the inner cavity of the target tube; and two ends of the three-rib type outer sleeve are welded with the inner cladding tube through the lower end head of the target tube and the upper end head of the target tube respectively.
Further, the water squeezing pipe comprises: a water squeezing pipe body; the two ends of the water squeezing pipe body are respectively provided with a water squeezing pipe lower end and a water squeezing pipe upper end; the upper end head of the water squeezing pipe is of a closed structure; the lower end head of the water squeezing pipe is of an opening structure; the lower end of the water squeezing pipe is close to the lower end of the target piece, and the upper end of the water squeezing pipe is close to the upper end of the target piece.
Further, the throttle member includes: the body part of the throttle lever is provided with throttle teeth, the upper end of the throttle lever is provided with a quincuncial structure end, and the lower end of the throttle lever is provided with a radial positioning protruding structure; the quincuncial structure ends are arranged in the sleeve and are connected with the three-reinforcement-tube type outer target tube, the three-reinforcement-tube type inner target tube and the lower end of the water squeezing tube; the radial positioning protruding structure is arranged in the lower end head of the target.
Further, the positioning tooth block includes: the tooth block is provided with a first tooth mouth, a second tooth mouth and a third tooth mouth for fixing the three-rib tubular outer target tube, the three-rib tubular inner target tube and the water squeezing tube respectively; the upper end of the tooth block is welded with the sleeve of the target and the upper end of the target respectively.
In a second aspect, embodiments of the present invention provide an assembly method for an irradiation target for research stack isotope irradiation production, comprising:
respectively loading a plurality of core blocks into the inner cavities of the three-rib tubular outer target tube and the three-rib tubular inner target tube;
welding two ends of a three-rib outer sleeve of the three-rib tubular outer target tube with an inner cladding tube of the three-rib tubular outer target tube through a lower end head of the target tube and an upper end head of the target tube, and performing inflation hole plugging welding on a vent hole of the upper end head of the target tube to obtain an assembled three-rib tubular outer target tube;
welding two ends of a three-rib outer sleeve of the three-rib tubular inner target tube with an inner cladding tube of the three-rib tubular inner target tube through a lower end head of the target tube and an upper end head of the target tube, and performing inflation hole plugging welding on a vent hole of the upper end head of the target tube to obtain an assembled three-rib tubular inner target tube;
the assembled three-rib tubular outer target tube is arranged in the sleeve;
loading the assembled three-rib tubular inner target tube into a central hole of the assembled three-rib tubular outer target tube;
filling the wringing pipe into the central hole of the assembled three-rib pipe type inner target pipe;
after the throttling element, the assembled three-rib tubular inner target tube, the assembled three-rib tubular outer target tube and the assembled water squeezing tube are arranged in the sleeve through the lower end head, one end of the sleeve is welded with the lower end head;
sealing the positioning tooth block, the assembled three-rib tubular inner target tube, the assembled three-rib tubular outer target tube and the assembled water squeezing tube into the sleeve through the upper end head, welding the positioning tooth block with the other end of the sleeve, and then welding the positioning tooth block with the upper end head; wherein, the positioning tooth block respectively compresses and fixes the three-reinforcement-tube type outer target tube, the three-reinforcement-tube type inner target tube and the water squeezing tube through the tooth openings.
Compared with the prior art, the embodiment of the invention has the following advantages and beneficial effects:
according to the irradiation target piece for research of isotope irradiation production and the assembly method, the irradiation target piece is sleeved on the outer side of the three-rib tubular outer target pipe through the sleeve; the three-reinforcement-tube type outer target tube is sleeved outside the three-reinforcement-tube type inner target tube; and a three-rib tubular inner target tube sleeved outside the wringing tube; water gaps are formed in the inner side and the outer side of the three-rib tubular outer target tube; the inner side and the outer side of the three-rib pipe type inner target pipe are also provided with water gaps; the three-rib tubular outer target tube and the three-rib tubular inner target tube are respectively provided with a target tube inner cavity for accommodating the core body, and the embodiment of the invention can be used for researching radiation production of radioactive isotopes of a pile and is suitable for radiation of nickel targets, neptunium targets and the like.
According to the embodiment of the invention, the target adopts a double-layer target structure, and the core body is pressed into the circular ring with smaller thickness, so that the target can be loaded with a large number of core bodies for in-pile irradiation, and the yield of the radioactive isotope is greatly improved; and through adopting three muscle tubular target tube structures, guaranteed that the target tube water gap is even, and then form the steady runner to inside and outside target refrigerated, can carry out high-efficient cooling to the inside and outside target tube when the target piece is irradiated, set up the throttling part in the lower extreme of target piece, control the velocity of flow through the target piece through the throttling part to fill the high-purity helium that heat transfer coefficient is higher in the target tube inside, further ensured the thermodynamic safety of target piece, and then ensured the irradiation safety of target piece.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are needed in the examples will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and that other related drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a construction of an irradiation target for research stack isotope irradiation production.
Fig. 2 is a schematic cross-sectional structure of an irradiation target for research stack isotope irradiation production.
Fig. 3 is a schematic structural view of a three-ribbed outer target tube and a three-ribbed inner target tube.
Fig. 4 is a schematic diagram of the structure of the positioning ribs of the three-rib tubular outer target tube and the three-rib tubular inner target tube.
Fig. 5 is a schematic structural view of the squeeze tube.
Fig. 6 is a schematic structural view of the throttle member.
Fig. 7 is a schematic view of the structure of the positioning tooth block.
In the drawings, the reference numerals and corresponding part names:
the device comprises a 1-lower end, a 2-throttling part, a 3-sleeve, a 4-three-rib pipe type outer target pipe, a 5-three-rib pipe type inner target pipe, a 6-water extrusion pipe, a 7-positioning tooth block, an 8-upper end, a 9-positioning rib, a 10-target pipe lower end, a 11-three-rib outer sleeve, a 12-core, a 13-target pipe upper end, a 14-water extrusion pipe lower end, a 15-water extrusion pipe body, a 16-water extrusion pipe upper end, a 17-radial positioning bulge structure, 18-throttling teeth, a 19-plum blossom-shaped structure end, a 20-first tooth mouth, a 21-second tooth mouth, a 22-third tooth mouth, a 23-tooth block and a 24-inner shell pipe.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: no such specific details are necessary to practice the invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail in order not to obscure the invention.
Throughout the specification, references to "one embodiment," "an embodiment," "one example," or "an example" mean: a particular feature, structure, or characteristic described in connection with the embodiment or example is included within at least one embodiment of the invention. Thus, the appearances of the phrases "in one embodiment," "in an example," or "in an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Moreover, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and that the illustrations are not necessarily drawn to scale. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention.
Examples
In order to solve the technical problem that the irradiation target piece which can study the irradiation production of the radioactive isotopes is lacking in the prior art, the embodiment of the invention provides the irradiation target piece and the assembly method for studying the irradiation production of the radioactive isotopes, which are used for studying the irradiation production of the radioactive isotopes and are suitable for the irradiation of nickel targets, neptunium targets and the like.
In a first aspect, an embodiment of the present invention provides an irradiation target for research on isotope irradiation production, referring to fig. 1, the target includes: the sleeve 3 is sleeved on the outer side of the three-rib tubular outer target tube; the three-reinforcement-tube type outer target tube 4 is sleeved outside the three-reinforcement-tube type inner target tube; and a three-rib tubular inner target tube 5 sleeved outside the water squeezing tube 6; water gaps are formed in the inner side and the outer side of the three-rib tubular outer target tube; the inner side and the outer side of the three-rib pipe type inner target pipe are also provided with water gaps; the three-rib tubular outer target tube and the three-rib tubular inner target tube are respectively provided with a target tube inner cavity for accommodating the core body.
Therefore, the technical problem that the irradiation double-layer target piece which can be used for researching the irradiation production of the radioactive isotopes is lacking in the prior art is solved through the sleeve, the three-rib tubular outer target tube and the three-rib tubular inner target tube.
Further, the target further comprises: an upper end 8 and a lower end 1 arranged at two ends of the target, and a throttling element 2 arranged inside the lower end.
Further, the lower end head of the target is welded with the lower end of the sleeve; the upper end of the target is welded with a positioning tooth block, and the positioning tooth block is welded with the upper end of the sleeve; the positioning tooth block 7 is used for fixing the three-reinforcement-tube type outer target tube, the three-reinforcement-tube type inner target tube and the water squeezing tube and guiding fluid to enter the water gaps of the three-reinforcement-tube type outer target tube and the three-reinforcement-tube type inner target tube.
Further, the thickness of the water gap at the inner side of the three-rib tubular outer target tube is larger than that at the outer side of the three-rib tubular outer target tube; the thickness of the water gap at the inner side and the outer side of the three-rib pipe type inner target pipe is the same.
Further, the sleeve is of a polygonal structure.
Further, three muscle tubular outer target pipe and three muscle tubular inner target pipe all include:
a three-rib type outer sleeve is sleeved outside the inner cladding tube 24, and a target tube inner cavity for accommodating the core body 12 is arranged between the inner side of the three-rib type outer sleeve 11 and the outer side of the inner cladding tube;
the two ends of the inner cladding tube are respectively provided with a target tube lower end head 10 and a target tube upper end head 13; the vent hole is arranged at the upper end of the target tube and communicated with the inner cavity of the target tube for introducing inert gas into the inner cavity of the target tube; and two ends of the three-rib type outer sleeve are welded with the inner cladding tube through the lower end head of the target tube and the upper end head of the target tube respectively.
Further, the water squeezing pipe comprises: a squeeze tube body 15; the two ends of the water squeezing pipe body are respectively provided with a water squeezing pipe lower end and a water squeezing pipe upper end; the upper end head 16 of the water squeezing pipe is of a closed structure; the lower end 14 of the wringing pipe is of an opening structure; the lower end of the water squeezing pipe is close to the lower end of the target piece, and the upper end of the water squeezing pipe is close to the upper end of the target piece.
Further, the throttle member includes: the throttle lever, the body part of the throttle lever has throttle teeth 18, the upper end of the throttle lever has quincuncial structure ends 19, the lower end of the throttle lever has radial positioning protruding structure 17; the quincuncial structure ends are arranged in the sleeve and are connected with the three-reinforcement-tube type outer target tube, the three-reinforcement-tube type inner target tube and the lower end of the water squeezing tube; the radial positioning protruding structure is arranged in the lower end head of the target. Specifically, the right end face of the quincuncial structure end head is used for axially positioning the three-rib tubular outer target tube, the three-rib tubular inner target tube and the water squeezing tube.
Further, the positioning tooth block includes: the tooth block 23 is provided with a first tooth port 20, a second tooth port 21 and a third tooth port 22 for fixing the three-rib tubular outer target tube, the three-rib tubular inner target tube and the water squeezing tube respectively; the upper end of the tooth block is welded with the sleeve of the target and the upper end of the target respectively.
1-7, an irradiation target for research of isotope irradiation production adopts a double-layer sleeve type structure, and comprises an inner layer water squeezing pipe, a three-rib pipe type inner target pipe, a three-rib pipe type outer target pipe, a throttling piece, a lower end socket, a hexagonal outer sleeve, a positioning tooth block and a hoisting upper joint; the core body is processed and pressed into a circular ring which is installed on the three-rib tubular inner target tube and the three-rib tubular outer target tube. The structural material of the target is 6061 aluminum alloy material.
The three-reinforcement-tube type inner target tube and the three-reinforcement-tube type outer target tube are respectively provided with a water gap at the inner side and the outer side, and by adopting the three-reinforcement-tube type target tube structure, the uniformity of the water gap of the target tube is ensured, and then a stable flow channel for cooling the inner target tube and the outer target tube is formed, the target tube during irradiation can be efficiently cooled, the lower ends of the three-reinforcement-tube type inner target tube and the three-reinforcement-tube type outer target tube are provided with throttling pieces, the flow velocity of the three-reinforcement-tube type inner target tube and the three-reinforcement-tube type outer target tube is controlled through throttling teeth of the throttling pieces, and high-purity helium with higher heat transfer coefficient is filled in the three-reinforcement-tube type inner target tube and the three-reinforcement-tube type outer target tube, so that the thermodynamic safety of the target piece during irradiation is ensured, and the irradiation safety of the target piece is further ensured. The three-reinforcement-tube type inner target tube and the three-reinforcement-tube type outer target tube are inserted into a reactor grid plate through lower ends, the upper ends of target pieces are provided with lifting upper ends, the target pieces are installed in a reactor irradiation duct through the lifting upper ends, the lower ends are welded with the lower ends of the hexagonal outer sleeves, the lifting upper ends are welded with positioning tooth blocks firstly, the positioning tooth blocks are welded with the upper ends of the hexagonal outer sleeves again, and in order to ensure that disturbance is not generated to the operation of the reactor when the target pieces are irradiated, the outer sleeves adopt a hexagonal structure consistent with the external dimension of a fuel element. The cross section of the target is shown by referring to fig. 2, and the target is sequentially provided with an inner layer water squeezing pipe, a three-rib pipe type inner target pipe, a three-rib pipe type outer target pipe and a hexagonal outer sleeve from inside to outside. Through thermal evaluation, the thicknesses of the water gaps at the inner side and the outer side of the three-rib tubular inner target tube are respectively designed to be 2mm, and the thicknesses of the water gaps at the inner side and the outer side of the three-rib tubular outer target tube are respectively designed to be 2mm and 1.5mm.
Referring to fig. 3 and 4, the three-ribbed inner target tube and the three-ribbed outer target tube each include: the inner cladding tube, the three-rib type outer sleeve, the lower end of the target tube, the upper end of the target tube and the core body; in order to facilitate isotope separation and purification and facilitate the installation and the taking out of the core body, the core body is made into a solid circular ring with smaller thickness, the total height of the inner cavity of the three-rib type outer sleeve target tube is 1005mm, a large number of core bodies can be respectively loaded into the three-rib type inner target tube and the three-rib type outer target tube for carrying out intra-pile irradiation, isotopes can be produced in a large quantity in one production period, and the yield of the isotopes is ensured. In order to ensure that the target tube can well contain radioactive gas, ensure the safety of the target and the operation safety of a reactor when the target is irradiated in a target pile, the minimum thickness of the upper end head of the inner cladding tube, the upper end head of the target tube and the lower end head of the target tube is not less than 2mm, all parts of the three-rib tube inner target tube and the three-rib tube outer target tube are welded, and in order to ensure the quality of welding seams, the welding modes of the inner cladding tube, the upper end head of the target tube and the lower end head of the target tube all adopt welding modes with backing plates, and the welding seams are subjected to ray and penetration inspection. The upper end of the target tube is provided with a vent hole, the vent hole is connected with the inner cavity of the target tube, high-purity helium is introduced into the target tube through the vent hole, the gap between the core body and the inner cladding tube is ensured to be filled with the high-purity helium with higher heat transfer coefficient, and the structure and thermal safety during irradiation of the three-rib tube type inner target tube and the three-rib tube type outer target tube are ensured by adopting the method.
Referring to fig. 5, the inner squeeze tube includes: the lower end head of the water squeezing pipe, the water squeezing pipe body and the upper end head of the water squeezing pipe are closed structures for reducing the influence of flow-induced vibration of water.
Referring to fig. 6, the throttling element comprises a throttling rod, a throttling tooth is arranged at the body part of the throttling rod, a quincuncial structure end is arranged at the upper end of the throttling rod, and a radial positioning protruding structure is arranged at the lower end of the throttling rod; the throttling teeth are used for throttling cooling water flowing into the target part of the reactor, 4 throttling teeth are used for reducing the impact vibration influence of water through a reactor outflow flow calibration test, the upper end of the throttling part adopts a quincuncial structure end, and two radial positioning protruding structures are arranged at the lower end of the throttling part.
Referring to fig. 7, the positioning tooth block includes: the tooth block is provided with a first tooth mouth, a second tooth mouth and a third tooth mouth for fixing the three-rib tubular outer target tube, the three-rib tubular inner target tube and the water squeezing tube respectively; the upper end of the tooth block is welded with the sleeve of the target and the upper end of the target respectively.
In a second aspect, embodiments of the present invention provide an assembly method for an irradiation target for research stack isotope irradiation production, comprising:
respectively loading a plurality of core blocks into the inner cavities of the three-rib tubular outer target tube and the three-rib tubular inner target tube;
welding two ends of a three-rib outer sleeve of the three-rib tubular outer target tube with an inner cladding tube of the three-rib tubular outer target tube through a lower end head of the target tube and an upper end head of the target tube, and performing inflation hole plugging welding on a vent hole of the upper end head of the target tube to obtain an assembled three-rib tubular outer target tube;
welding two ends of a three-rib outer sleeve of the three-rib tubular inner target tube with an inner cladding tube of the three-rib tubular inner target tube through a lower end head of the target tube and an upper end head of the target tube, and performing inflation hole plugging welding on a vent hole of the upper end head of the target tube to obtain an assembled three-rib tubular inner target tube;
the assembled three-rib tubular outer target tube is arranged in the sleeve;
loading the assembled three-rib tubular inner target tube into a central hole of the assembled three-rib tubular outer target tube;
filling the wringing pipe into the central hole of the assembled three-rib pipe type inner target pipe;
after the throttling element, the assembled three-rib tubular inner target tube, the assembled three-rib tubular outer target tube and the assembled water squeezing tube are arranged in the sleeve through the lower end head, one end of the sleeve is welded with the lower end head;
sealing the positioning tooth block, the assembled three-rib tubular inner target tube, the assembled three-rib tubular outer target tube and the assembled water squeezing tube into the sleeve through the upper end head, welding the positioning tooth block with the other end of the sleeve, and then welding the positioning tooth block with the upper end head; wherein, the positioning tooth block respectively compresses and fixes the three-reinforcement-tube type outer target tube, the three-reinforcement-tube type inner target tube and the water squeezing tube through the tooth openings.
The assembly method comprises the following steps: firstly, processing finished parts and manufacturing a core body, and then assembling and welding the three-rib type inner and outer target tubes;
the process of assembling the three-rib pipe type inner target pipe and the three-rib pipe type outer target pipe comprises the steps of firstly filling a core block into an inner cladding pipe, then welding the lower end head of the target pipe, the upper end head of the target pipe and the inner cladding pipe together, and finally helium filling and hole plugging welding are carried out on an air hole of the upper end head of the target pipe, and the whole assembling process is completed in a protective working box;
after the three-reinforcement-tube type inner target tube and the three-reinforcement-tube type outer target tube are assembled, welding seam nondestructive inspection, pressure test and helium leak detection test are sequentially carried out on the three-reinforcement-tube type inner target tube and the three-reinforcement-tube type outer target tube, the three-reinforcement-tube type outer target tube is sequentially arranged in the outer sleeve after the tests are qualified, the three-reinforcement-tube type inner target tube is arranged in the central hole of the outer layer target tube, and the inner layer water squeezing tube is arranged in the central hole of the inner layer target tube.
The outer wall surfaces of the three-rib pipe type inner target pipe, the three-rib pipe type outer target pipe and the inner layer wringing pipe are provided with positioning ribs 9, so that each part can be positioned to form a stable flow channel. After the three-rib tubular inner target tube, the three-rib tubular outer target tube and the inner layer water extrusion tube are assembled, the throttling element can be arranged in the lower end head, then the throttling element and the inner layer water extrusion tube are arranged in the hexagonal outer sleeve together, and the lower end head and the hexagonal outer sleeve are welded together. The upper end of the outer sleeve is tightly pressed with the inner target tube, the outer target tube and the water squeezing tube by using the positioning tooth block, then the positioning tooth block is welded with the outer sleeve, and finally the upper end head is welded with the positioning tooth block.
Therefore, the target of the embodiment of the invention can simultaneously load a large number of cores for in-pile irradiation, thereby greatly improving the yield of the radioactive isotope; and through adopting three muscle tubular target tube structures, guaranteed that the target tube water gap is even, and then form the steady runner to inside and outside target refrigerated, can carry out high-efficient cooling to the inside and outside target tube when the target piece is irradiated, set up the throttling part in the lower extreme of target piece, control the velocity of flow through the target piece through the throttling part to fill the high-purity helium that heat transfer coefficient is higher in the target tube inside, further ensured the thermodynamic safety of target piece, and then ensured the irradiation safety of target piece.
In summary, the embodiment of the invention can realize the processing and assembly of the target, ensure the processing quality of the target, ensure that the manufactured target meets the design requirement, and further ensure the safety of the irradiation of the target entering the reactor and the operation of the reactor. The irradiation target is inserted into the reactor grid plate through the lower end head, and the upper end is provided with the hoisting head, so that the requirements of an interface with a research reactor can be met, and the irradiation target has good structural stability.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. An irradiation target for research stack isotope irradiation production, the target comprising:
the sleeve is sleeved on the outer side of the three-rib tubular outer target tube;
the three-reinforcement-tube type outer target tube is sleeved outside the three-reinforcement-tube type inner target tube; and
the three-rib pipe type inner target pipe is sleeved on the outer side of the wringing pipe;
water gaps are formed in the inner side and the outer side of the three-rib tubular outer target tube; the inner side and the outer side of the three-rib pipe type inner target pipe are also provided with water gaps; the three-rib tubular outer target tube and the three-rib tubular inner target tube are respectively provided with a target tube inner cavity for accommodating the core body;
and three positioning ribs are uniformly arranged on the outer wall surfaces of the three-rib tubular outer target tube and the three-rib tubular inner target tube along the axial direction.
2. The irradiation target for research stack isotope irradiation production of claim 1, wherein said target further comprises: the upper end and the lower end are arranged at two ends of the target piece, and the throttling piece is arranged inside the lower end.
3. The irradiation target for research reactor isotope irradiation production of claim 2 wherein the lower end of the target is welded to the lower end of the sleeve; the upper end of the target is welded with a positioning tooth block, and the positioning tooth block is welded with the upper end of the sleeve; the positioning tooth block is used for fixing the three-reinforcement-tube type outer target tube, the three-reinforcement-tube type inner target tube and the water squeezing tube and guiding fluid to enter the water gaps of the three-reinforcement-tube type outer target tube and the three-reinforcement-tube type inner target tube.
4. The irradiation target for research heap isotope irradiation production of claim 3, wherein the water gap thickness of the inner side of the three-ribbed outer target tube is greater than the water gap thickness of the outer side of the three-ribbed outer target tube; the thickness of the water gap at the inner side and the outer side of the three-rib pipe type inner target pipe is the same.
5. The irradiation target for research heap isotope irradiation production of claim 1 wherein said sleeve is of polygonal configuration.
6. The irradiation target element for research heap isotope irradiation production of any of claims 1-5, wherein said three-ribbed outer target tube and three-ribbed inner target tube each comprise:
the three-rib type outer sleeve is sleeved on the outer side of the inner cladding tube, and a target tube inner cavity for accommodating the core body is arranged between the inner side of the three-rib type outer sleeve and the outer side of the inner cladding tube;
the two ends of the inner cladding tube are respectively provided with a target tube lower end and a target tube upper end; the vent hole is arranged at the upper end head of the target tube and communicated with the inner cavity of the target tube for introducing inert gas into the inner cavity of the target tube; and two ends of the three-rib type outer sleeve are welded with the inner cladding tube through the lower end head of the target tube and the upper end head of the target tube respectively.
7. The irradiation target for research heap isotope irradiation production of claim 6, wherein said wringing tube includes: a water squeezing pipe body; the two ends of the water squeezing pipe body are respectively provided with a water squeezing pipe lower end and a water squeezing pipe upper end; the upper end head of the water squeezing pipe is of a closed structure; the lower end head of the water squeezing pipe is of an opening structure; the lower end of the water squeezing pipe is close to the lower end of the target piece, and the upper end of the water squeezing pipe is close to the upper end of the target piece.
8. The irradiation target for research stack isotope irradiation production of claim 2 wherein said orifice comprises: the body part of the throttle lever is provided with throttle teeth, the upper end of the throttle lever is provided with a quincuncial structure end, and the lower end of the throttle lever is provided with a radial positioning protruding structure; the quincuncial structure ends are arranged in the sleeve and are connected with the three-reinforcement-tube type outer target tube, the three-reinforcement-tube type inner target tube and the lower end of the water squeezing tube; the radial positioning protruding structure is arranged in the lower end head of the target.
9. A irradiation target set forth in claim 3, wherein said positioning tooth block comprises: the tooth block is provided with a first tooth mouth, a second tooth mouth and a third tooth mouth for fixing the three-rib tubular outer target tube, the three-rib tubular inner target tube and the water squeezing tube respectively; the upper end of the tooth block is welded with the sleeve of the target and the upper end of the target respectively.
10. An assembly method for an irradiation target for research stack isotope irradiation production, comprising:
respectively loading a plurality of core blocks into the inner cavities of the three-rib tubular outer target tube and the three-rib tubular inner target tube;
welding two ends of a three-rib outer sleeve of the three-rib tubular outer target tube with an inner cladding tube of the three-rib tubular outer target tube through a lower end head of the target tube and an upper end head of the target tube, and performing inflation hole plugging welding on a vent hole of the upper end head of the target tube to obtain an assembled three-rib tubular outer target tube;
welding two ends of a three-rib outer sleeve of the three-rib tubular inner target tube with an inner cladding tube of the three-rib tubular inner target tube through a lower end head of the target tube and an upper end head of the target tube, and performing inflation hole plugging welding on a vent hole of the upper end head of the target tube to obtain an assembled three-rib tubular inner target tube;
the assembled three-rib tubular outer target tube is arranged in the sleeve;
loading the assembled three-rib tubular inner target tube into a central hole of the assembled three-rib tubular outer target tube;
filling the wringing pipe into the central hole of the assembled three-rib pipe type inner target pipe;
after the throttling element, the assembled three-rib tubular inner target tube, the assembled three-rib tubular outer target tube and the assembled water squeezing tube are arranged in the sleeve through the lower end head, one end of the sleeve is welded with the lower end head;
sealing the positioning tooth block, the assembled three-rib tubular inner target tube, the assembled three-rib tubular outer target tube and the assembled water squeezing tube into the sleeve through the upper end head, welding the positioning tooth block with the other end of the sleeve, and then welding the positioning tooth block with the upper end head; wherein, the positioning tooth block respectively compresses and fixes the three-reinforcement-tube type outer target tube, the three-reinforcement-tube type inner target tube and the water squeezing tube through the tooth openings.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211186103.2A CN115691853B (en) | 2022-09-26 | 2022-09-26 | Irradiation target for research stack isotope irradiation production and assembly method |
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| CN202211186103.2A CN115691853B (en) | 2022-09-26 | 2022-09-26 | Irradiation target for research stack isotope irradiation production and assembly method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2507026Y (en) * | 2001-10-19 | 2002-08-21 | 吕凯旋 | Improved protective sleeve for optical cable |
| WO2005005682A1 (en) * | 2003-07-04 | 2005-01-20 | Bekaert Advanced Coatings | Rotating tubular sputter target assembly |
| CN216241441U (en) * | 2021-09-13 | 2022-04-08 | 昆山莹帆精密五金有限公司 | Fan metal middle pipe positioning rib |
| CN114937517A (en) * | 2022-04-27 | 2022-08-23 | 中国原子能科学研究院 | Double-layer short target capable of being stacked and positioned |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060278519A1 (en) * | 2005-06-10 | 2006-12-14 | Leszek Malaszewski | Adaptable fixation for cylindrical magnetrons |
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- 2022-09-26 CN CN202211186103.2A patent/CN115691853B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2507026Y (en) * | 2001-10-19 | 2002-08-21 | 吕凯旋 | Improved protective sleeve for optical cable |
| WO2005005682A1 (en) * | 2003-07-04 | 2005-01-20 | Bekaert Advanced Coatings | Rotating tubular sputter target assembly |
| CN216241441U (en) * | 2021-09-13 | 2022-04-08 | 昆山莹帆精密五金有限公司 | Fan metal middle pipe positioning rib |
| CN114937517A (en) * | 2022-04-27 | 2022-08-23 | 中国原子能科学研究院 | Double-layer short target capable of being stacked and positioned |
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| CN115691853A (en) | 2023-02-03 |
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