CN111063463B - Object carrying device and object carrying method for nondestructive testing of fuel assembly - Google Patents
Object carrying device and object carrying method for nondestructive testing of fuel assembly Download PDFInfo
- Publication number
- CN111063463B CN111063463B CN202010002777.7A CN202010002777A CN111063463B CN 111063463 B CN111063463 B CN 111063463B CN 202010002777 A CN202010002777 A CN 202010002777A CN 111063463 B CN111063463 B CN 111063463B
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- fuel assembly
- base
- top plate
- motor
- chassis
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- 239000000446 fuel Substances 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000009659 non-destructive testing Methods 0.000 title claims abstract description 12
- 238000003825 pressing Methods 0.000 claims abstract description 29
- 230000006835 compression Effects 0.000 claims description 27
- 238000007906 compression Methods 0.000 claims description 27
- 239000002826 coolant Substances 0.000 claims description 26
- 230000005540 biological transmission Effects 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000005855 radiation Effects 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 7
- 239000000306 component Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000013170 computed tomography imaging Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention provides a carrier device for nondestructive testing of a fuel assembly, the device comprising: the rotary table, the upright posts and the pressing mechanism adopt the modes of upper end pressing and lower end clamping to fix the tested fuel assembly, so that the tested assembly is ensured not to deflect or vibrate in the scanning process, the accuracy of position data is improved, the radiation of high-energy X rays to devices such as a motor can be shielded, and the service life of the device is effectively prolonged. The invention also provides a carrying method for nondestructive testing of the fuel assembly.
Description
Technical Field
The invention belongs to the field of fuel assembly detection, and particularly relates to a carrying device and a carrying method for nondestructive detection of a fuel assembly.
Background
The fuel assembly is a core component in a nuclear reactor, and comprises a framework and fuel rods for the nuclear power plant. The fuel assembly is in a strong neutron field during operation within the reactor, and is subjected not only to the harsh environment of high temperature and high pressure, but also to flushing of the coolant at high flow rates, while being subjected to fission product chemistry and complex mechanical loading. The fuel assemblies are typically available for 3 to 5 years, during which time the internal structure of the fuel assembly needs to be checked to ensure that the nuclear reactor is able to operate safely.
The high-energy X-ray CT imaging technology is a nondestructive testing and nondestructive evaluation technology, and can clearly, accurately and intuitively display the internal structure, composition, material and defect condition of a detected object in the form of a two-dimensional tomographic image or a three-dimensional stereoscopic image under the condition of not damaging the detected object. The high-energy X-ray CT technology is suitable for detecting the fuel assembly, background radiation of the fuel assembly can be shielded by using high-energy X-rays, and clear images of the internal structure of the fuel assembly can be obtained without damaging the fuel assembly through analysis and image reconstruction of ray intensity data and position data.
In the process of measuring by using the high-energy X-ray CT imaging technology, the scanning process for acquiring data information requires the tested component to perform relative motion with the ray source-detector system, so that the tested fuel component needs to be installed on a workbench to drive the component to perform indexing motion, the accuracy of the scanning motion determines the accuracy of position data, and the quality of image reconstruction is directly affected. The nondestructive testing system for the conventional use generally adopts a single-end clamping mode to fix the sample, but the fuel assembly is of a typical slender structure, and if the single-end clamping mode is adopted, the conditions such as deflection, vibration and the like often occur during scanning, so that the position data is inaccurate, and the image reconstruction is interfered. In addition, when the CT imaging device is used for detecting the fuel assembly, the device is in a radioactive working environment, and high-energy X-rays and background radiation of the fuel assembly can damage devices such as a motor, so that radiation protection is required to be carried out on sensitive devices.
Disclosure of Invention
The invention mainly aims to provide a carrying device and a carrying method for nondestructive testing of a fuel assembly, which can ensure the accuracy of position data in scanning and effectively shield the radiation of high-energy X rays to the device.
In one aspect, the present invention provides a carrier device for non-destructive testing of a fuel assembly, comprising:
A turntable, comprising:
A base;
the motor is arranged in the base;
The rotating shaft is arranged in the base;
The transmission unit is arranged in the base and connected with the motor and the rotating shaft, so that the motor controls the rotating shaft to rotate;
The rotating disc is connected with the rotating shaft and can rotate under the drive of the rotating shaft;
A flange; and
The three-jaw chuck is connected with the turntable through a flange;
One end of the upright post is fixed on the base of the rotary table; and
A hold-down mechanism, comprising:
The rotary pressing cylinder is arranged at the other end of the upright post;
one end of the rocker arm is connected with the rotary pressing cylinder;
the top disc is horizontally and rotatably fixed at the other end of the rocker arm;
The middle part of the chassis is provided with a boss protruding towards the direction of the top plate, and the bottom of the boss comprises a cavity; and
And a plurality of compression units, each of which connects the top plate with the bottom plate and can shorten the distance between the top plate and the bottom plate by compression.
In some embodiments, the drive unit includes at least one pair of meshing gears and at least one pair of worm and worm gear.
In some embodiments, the base is made of stainless steel.
In some embodiments, the base further comprises a lead layer at the location where the motor is located.
In some embodiments, the top tray is connected to the bottom tray by three or more compression units.
In some embodiments, each compression unit includes a rigid connector and a spring surrounding the rigid connector, the rigid connector being secured at both ends to the top and bottom discs, respectively, wherein the connection to the bottom disc is such that the bottom disc can move upward.
In some embodiments, the rigid connection comprises a bolt.
In another aspect, the present invention provides a carrier method for non-destructive testing of a fuel assembly, comprising the steps of:
clamping a coolant inlet end of the fuel assembly with a three-jaw chuck;
Enabling a coolant outlet end of the fuel assembly to enter a cavity of a boss in the middle of a chassis of the compressing mechanism;
And starting the rotary pressing cylinder to enable the top disc of the pressing mechanism to move downwards until the coolant outlet end of the fuel assembly is pressed by the boss.
The object carrying device of the invention adopts the modes of upper end compaction and lower end clamping to fix the tested fuel assembly, and can realize the following beneficial effects:
(1) The tested component is prevented from deflecting or vibrating in the scanning process, and the accuracy of the position data is improved;
(2) The whole structural design of the device can shield the radiation of high-energy X rays to devices such as a motor and the like, and effectively prolongs the service life of the device.
Drawings
Other objects and advantages of the present invention will become more fully apparent to those having ordinary skill in the art from the following description of the invention with reference to the accompanying drawings.
Fig. 1 shows a cross-sectional view of a carrier device according to one embodiment of the invention.
Fig. 2 shows a cross-sectional view of a turntable of the carrier device according to one embodiment of the present invention.
Fig. 3 shows a schematic view of the column and hold-down mechanism of the load device according to one embodiment of the invention.
The reference numerals in the drawings have the following meanings:
1. Rotary table, 101, base, 102, motor, 103, shaft, 104, drive unit, 1041, drive wheel, 1042, driven wheel, 1043, worm, 1044, worm gear, 105, turntable, 106, flange, 107, three jaw chuck, 2, upright, 3, hold-down mechanism, 301, rotary hold-down cylinder, 302, rocker arm, 303, top plate, 304, bottom plate, 305, boss, 306, compression unit.
Detailed Description
The technical scheme of the invention is further specifically described below through examples and with reference to the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components.
In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in the drawings in order to simplify the drawings.
In operation of a nuclear reactor, coolant generally flows upwardly from the lower end of the fuel assembly, i.e., the lower end of the fuel assembly is a coolant inlet end, is elongate in shape, and the upper end of the fuel assembly is a coolant outlet end, which is a relatively thick cylinder. According to the object carrying device, the lower end clamping mode and the upper end pressing mode are respectively selected to fix according to different shapes of two ends of the fuel assembly, so that the fuel assembly is stable in the process of scanning in indexing movement, torsion cannot occur, and accurate position information is obtained.
FIGS. 1-3 illustrate a carrier device for non-destructive testing of a fuel assembly according to one embodiment of the invention, comprising:
the turntable 1 includes:
a base 101;
a motor 102 disposed inside the base 101;
A rotation shaft 103 provided inside the base 101;
The transmission unit 104 is arranged in the base 101 and is connected with the motor 102 and the rotating shaft 103, so that the motor 102 controls the rotating shaft 103 to rotate;
a turntable 105 connected to the rotation shaft 103 and rotatable under the drive of the rotation shaft 103;
a flange 106; and
A three-jaw chuck 107 connected to the turntable 105 via a flange 106;
the upright post 2, one end of the upright post 2 is fixed on the base 101 of the rotary table 1; and
The hold-down mechanism 3 includes:
A rotary pressing cylinder 301 disposed at the other end of the column 2;
a rocker arm 302, one end of the rocker arm 302 being connected to the rotary pressing cylinder 301;
A top plate 303 horizontally rotatably fixed to the other end of the swing arm 302;
A bottom plate 304, the middle part of which is provided with a boss 305 protruding towards the direction of the top plate 303, and the bottom of the boss 305 comprises a cavity; and
A plurality of compression units 306 each connecting the top plate 303 with the bottom plate 304 and capable of shortening the distance between the top plate 303 and the bottom plate 304 by compression.
The object carrying device provided by the invention fixes the tested fuel assembly in a manner of pressing the upper end and clamping the lower end, wherein the rotary table 1 drives the clamped fuel assembly to do indexing movement, and the pressing mechanism 3 enables the upper end of the fuel assembly to be pressed, so that the fuel assembly can integrally rotate along with the rotary table 1 without twisting.
The turntable 1 comprises a base 101, a motor 102, a rotating shaft 103, a transmission unit 104, a turntable 105, a flange 106 and a three-jaw chuck 107. The motor 102, the rotating shaft 103 and the transmission unit 104 are arranged inside the base 101, and the power of the motor 102 is transmitted to the rotating shaft 103 through the transmission unit 104, so that the motor 102 controls the rotating shaft 103 to rotate.
The motor 102 is provided inside the base 101, and the base 101 is made of stainless steel so as to be able to shield radiation of high-energy X-rays. In order to obtain a better shielding effect, a lead layer can be arranged at the position where the motor is arranged. In some embodiments, a servo motor is used to more precisely control the rotation of the motor to achieve accurate positioning.
In some embodiments, the transmission unit 104 includes at least one pair of meshing gears and at least one pair of worm and worm gear. In the embodiment shown in fig. 2, the transmission unit 104 includes a driving wheel 1041, a driven wheel 1042, a worm 1043, and a worm wheel 1044.
The turntable 105 is connected with the rotating shaft 103 and can rotate under the drive of the rotating shaft 103, and is connected with the three-jaw chuck 107 through the flange 106, so that the three-jaw chuck 107 and the turntable 105 rotate under the drive of the rotating shaft 103 at the same time.
The three-jaw chuck 107 is used to secure the coolant inlet port of the fuel assembly, which, due to its slim shape, can be secured by being gripped by the three-jaw chuck 107.
The upright post 2 is connected with the rotary table 1 and the pressing mechanism 3.
The hold-down mechanism 3 includes a rotary hold-down cylinder 301, a rocker arm 302, a top plate 303, a bottom plate 304, and a plurality of compression units 306.
The rotary pressing cylinder 301 is provided at one end of the column 2 and is connected to one end of the rocker arm 302. The rocker arm 302 may be rotated at least 90 deg., such as 180 deg. or 360 deg., about the rotary hold-down cylinder 301 so as to be rotatable to a position that does not interfere with operation when securing the lower end of the fuel assembly.
The rocker arm 302 has opposite ends connected to a rotary hold-down cylinder 301 and a top plate 303, respectively. The top plate 303 is rotatable about a point of attachment to the rocker arm 302 in a plane generally parallel to the rocker arm 302 to enable the entire fuel assembly to be rotated by the turntable after compression of the coolant outlet port of the fuel assembly.
The middle part of the bottom plate 304 is provided with a boss 305 protruding towards the direction of the top plate 303, and the bottom of the boss 305 comprises a cavity for accommodating the coolant outlet end of the fuel assembly therein for fixing, so that the shape of the boss 305 is substantially the same as the shape of the coolant outlet end, and the diameter of the cavity is slightly larger than the diameter of the coolant outlet end. The clamped position of the three jaw chuck 107 is aligned with the boss 305 of the chassis 304 so that the upper and lower ends of the fuel assembly are secured in a substantially vertical position.
The pressing mechanism 3 includes a plurality of compression units 306, for example, three or more compression units 306, which are disposed at equal intervals at the edges of the top and bottom plates. The embodiment shown in fig. 3 employs three compression units, with a corresponding central angle between adjacent compression units of about 120 °. Each compression unit connects the top plate 303 with the bottom plate 304 and enables the distance between the top plate 303 and the bottom plate 304 to be shortened by compression, thereby enabling the coolant outlet end of the fuel assembly to be compressed by the boss in the middle of the bottom plate of the compression mechanism.
In some embodiments, the compression unit includes a rigid connection and a spring surrounding the rigid connection. The two ends of the rigid connecting piece are respectively fixed on the top disc and the bottom disc, wherein the rigid connecting piece is connected with the bottom disc in a mode that the rigid connecting piece limits the maximum distance between the top disc and the bottom disc, namely the bottom disc can move upwards from the maximum distance but cannot move downwards. The rigid connecting piece can also play a role in fixing the relative positions of the top disc and the bottom disc, and the fuel assembly is prevented from twisting in the rotating process.
In some embodiments, the rigid connection comprises a bolt, secured at each end to the top and bottom plates, such as by nuts, wherein the connection to the bottom plate is such that the bottom plate cannot move downward but can move upward. For example, the bolts pass through holes in the chassis and are fixed by nuts at the lower side of the chassis, and the diameter of the through holes is smaller than the outer diameter of the nuts, so that the chassis cannot move downwards, but the diameter of the through holes is slightly larger than that of the bolts, and the chassis can move upwards freely. The distance between the top plate and the bottom plate can be shortened by compression of the spring surrounding the bolt.
When the object carrying device is used, the coolant inlet end of the fuel assembly is clamped by the three-jaw chuck, so that the coolant outlet end of the fuel assembly enters the boss in the middle of the chassis of the compressing mechanism, the rotary pressing cylinder is started, the top plate of the compressing mechanism moves downwards, the compressing unit is compressed, the distance between the top plate and the chassis is shortened, and the coolant outlet end of the fuel assembly is compressed by the top of the boss.
After the fuel assembly is fixed on the object carrying device, the rotating shaft is controlled by the motor to rotate, so that the turntable and the three-jaw chuck synchronously rotate, the coolant inlet end of the fuel assembly fixed on the three-jaw chuck is driven to rotate, the coolant outlet end of the fuel assembly pressed by the boss top of the chassis also simultaneously rotates, and the top plate is driven to rotate together due to the fact that the rigid connecting piece plays a role of fixing the relative positions of the top plate and the chassis, and the top plate can freely rotate relative to the rocker arm, so that the whole fuel assembly rotates.
The invention is further illustrated by the following examples.
In one embodiment, the carrier device is as shown in FIGS. 1-3. As shown in fig. 1, the carrying device comprises a rotary table 1, a stand column 2 and a pressing mechanism 3, wherein the rotary table 1 is used for fixing one end of a coolant inlet of a fuel assembly and driving the fuel assembly to do indexing movement, and the pressing mechanism 3 is used for fixing one end of a coolant outlet of the fuel assembly.
As shown in fig. 2, the turntable 1 comprises a base 101, a motor 102, a rotating shaft 103, a transmission unit 104, a turntable 105, a flange 106 and a three-jaw chuck 107, wherein the base 101 is made of stainless steel, an upper panel of the base is penetrated and inserted with the rotating shaft 103 through a bearing, the upper end of the rotating shaft 103 is connected with the turntable 105, the turntable 105 is connected with the three-jaw chuck 107 through the flange 106, the lower end of the rotating shaft is connected with the motor 102 through the transmission unit 104, and the transmission unit 104 comprises a pair of meshing gears (a driving wheel 1041 and a driven wheel 1042) and a pair of worm and worm wheel (a worm 1043 and a worm wheel 1044). The motor 102 is disposed inside the base 101, the motor 102 drives a pair of meshing gears (a driving wheel 1041 and a driven wheel 1042) to rotate, the driven wheel 1042 drives a worm 1043 to rotate, the worm 1043 drives a worm wheel 1044 to rotate, the worm wheel 1044 drives a rotating shaft 103 to rotate, and the rotating shaft 103 drives the turntable 105, the flange 106 and the three-jaw chuck 107 to rotate together.
As shown in fig. 3, the hold-down mechanism 3 includes a rotary hold-down cylinder 301, a rocker arm 302, a top plate 303, a bottom plate 304, and a compression unit 306. An upright post 2 is fixed at one side edge of the base 101, a rotary pressing cylinder 301 is arranged at the other end of the upright post 2, the rotary pressing cylinder 301 is connected with a top disc 303 through a rocker arm 302, and the top disc 303 can horizontally rotate relative to the rocker arm 302. The top plate 303 is connected with the bottom plate 304 through three compression units 306, a boss 305 is arranged in the middle of the bottom plate 304, a cavity is arranged at the bottom of the boss 305 and used for accommodating a coolant outlet end of the fuel assembly, each compression unit 306 comprises a bolt and a spring surrounding the bolt, the bolt penetrates through holes in the top plate 303 and the bottom plate 304, the compression units 306 are respectively connected with the top plate 303 and the bottom plate 304 through fixing by nuts, and the diameter of the through holes in the bottom plate is slightly larger than that of the bolts, so that the bottom plate can move upwards freely from the lowest position. The distance between the top plate 303 and the bottom plate 304 can be shortened by compression of the spring surrounding the bolt.
When the rotary pressing cylinder 301 is used, the rotary pressing cylinder 301 is deflected for 90 degrees, the coolant inlet end of the fuel assembly is clamped by the three-jaw chuck, then the rotary pressing cylinder 301 is rotated, the coolant outlet end of the fuel assembly enters a cavity at the bottom of a boss 305 in the middle of a chassis 304 of the pressing mechanism, when the rotary pressing cylinder 301 moves downwards, the rocker arm 302 drives the top plate 303 to move downwards, the spring deforms, and the distance between the top plate 303 and the chassis 304 is reduced until the tested fuel assembly is pressed by the top of the boss 305.
After the fuel assembly is fixed on the object carrying device, the motor is started, the rotary table can stably drive the assembly to rotate, relative motion is carried out according to a required angle or length interval, scanning is carried out through a high-energy X-ray CT imaging technology, and a clear image of the internal structure of the fuel assembly is obtained through analysis and image reconstruction of ray intensity data and position data.
Although the present invention has been described with reference to the accompanying drawings, the examples disclosed in the drawings are intended to illustrate embodiments of the invention and are not to be construed as limiting the invention.
It would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.
Claims (6)
1. A carrier device for non-destructive testing of a fuel assembly, comprising:
Revolving platform (1), comprising:
A base (101);
a motor (102) disposed inside the base (101);
a rotating shaft (103) arranged inside the base (101);
The transmission unit (104) is arranged in the base (101) and is connected with the motor (102) and the rotating shaft (103) so that the motor (102) controls the rotating shaft (103) to rotate;
the rotary table (105) is connected with the rotary shaft (103) and can rotate under the drive of the rotary shaft (103);
a flange (106); and
The three-jaw chuck (107) is connected with the turntable (105) through a flange (106);
The upright post (2), one end of the upright post (2) is fixed on the base (101) of the rotary table (1); and
Pressing mechanism (3), comprising:
The rotary pressing cylinder (301) is arranged at the other end of the upright post (2);
The rocker arm (302), one end of the rocker arm (302) is connected with the rotary pressing cylinder (301);
a top plate (303) horizontally rotatably fixed to the other end of the rocker arm (302);
A base plate (304), the middle part of which is provided with a boss (305) protruding towards the direction of the top plate (303), and the bottom of the boss (305) comprises a cavity; and
A plurality of compression units (306), each of which connects the top plate (303) with the bottom plate (304) and can shorten the distance between the top plate (303) and the bottom plate (304) by compression;
Each compression unit (306) comprises a rigid connecting piece and a spring surrounding the rigid connecting piece, wherein two ends of the rigid connecting piece are respectively fixed on the top plate (303) and the bottom plate (304), and the rigid connecting piece is connected with the bottom plate (304) in a way that the bottom plate (304) can move upwards;
The rigid connection comprises a bolt;
The bolt passes through the through hole on the chassis, is fixed with the nut in the downside of chassis, the diameter of through-hole is less than the external diameter of nut for the chassis can not move downwards, but the diameter of through-hole is slightly greater than the diameter of bolt, thereby the chassis can upwards freely move.
2. The carrier device of claim 1, wherein the transmission unit (104) comprises at least one pair of meshing gears and at least one pair of worm and worm wheel.
3. The carrier device according to claim 1 or 2, wherein the base (101) is made of stainless steel.
4. The carrier device according to claim 1, wherein the base (101) further comprises a lead layer at the location where the motor (102) is located.
5. The carrier device according to claim 1, wherein the top tray (303) and the bottom tray (304) are connected by means of three or more compression units (306).
6. A carrier method for non-destructive testing of a fuel assembly using a carrier device according to any one of claims 1-5, comprising the steps of:
clamping a coolant inlet end of the fuel assembly with a three-jaw chuck (107);
The coolant outlet end of the fuel assembly enters the cavity of a boss (305) in the middle of a chassis (304) of the compressing mechanism (3);
The rotary pressing cylinder (301) is started to enable the top disc (303) of the pressing mechanism (3) to move downwards until the coolant outlet end of the fuel assembly is pressed by the boss (305).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010002777.7A CN111063463B (en) | 2020-01-02 | 2020-01-02 | Object carrying device and object carrying method for nondestructive testing of fuel assembly |
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| CN202010002777.7A CN111063463B (en) | 2020-01-02 | 2020-01-02 | Object carrying device and object carrying method for nondestructive testing of fuel assembly |
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| CN111063463B true CN111063463B (en) | 2024-05-31 |
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| CN113916915A (en) * | 2021-09-24 | 2022-01-11 | 洛阳中信成像智能科技有限公司 | CT detection protection device for fragile bronze cultural relics |
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