A device for detecting the uniformity of nuclear fuel plate uranium

Abstract

The application discloses a kind of nuclear material plate uranium uniformity detection devices, it includes the feeding roller way conveying device (1) sequentially arranged from left to right, support (2) and discharging roller way conveying device (3), support (2) is respectively provided with detector assembly (4) and calibration assembly (5) on front and rear ends, detector assembly (4) is set to the front side of feeding roller way conveying device (1), detector assembly (4) includes linear module (6), detector (7) and gamma ray radiation source (8), linear module (6) is set to the top surface of support (2), the slider (22) of linear module (6) is fixed with connecting frame (9), the rear end of connecting frame (9) is provided with L plate (10), and the horizontal plate of L plate (10) is provided with gamma ray radiation source (8).The beneficial effects of the present application are: compact structure, realize the automatic flow detection of the uranium surface density value of nuclear material plate, improve the detection efficiency, simple operation.

Description

Technical Field

[0001] This invention relates to the technical field of uranium density values ​​in nuclear feed plates, and in particular to a device for detecting the uniformity of uranium in nuclear feed plates. Background Technology

[0002] Nuclear fuel plates are typically long and narrow. To ensure their performance, the uniformity of core nuclear material distribution must be tested before the fuel plates leave the factory. While existing testing equipment can perform these performance evaluations, its automation level is low, lacking automatic loading and unloading, automatic feeding, and continuous testing of batches of products. Furthermore, excessive manual intervention makes it difficult to control the repeatability of measurements. Therefore, there is an urgent need for a highly efficient, high-precision, automated uranium uniformity testing device for nuclear fuel plates. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a compact, efficient, cost-effective, and easy-to-operate uranium uniformity detection device for nuclear material plates.

[0004] The objective of this invention is achieved through the following technical solution: a uranium uniformity detection device for nuclear material plates, comprising a feed roller conveyor, a support, and an discharge roller conveyor arranged sequentially from left to right. A detector assembly and a calibration assembly are respectively arranged on the front and rear ends of the support. The detector assembly is located on the front side of the feed roller conveyor and includes a linear module, a detector, and a gamma-ray source. The linear module is arranged longitudinally on the top surface of the support. A connecting frame is fixed on the slider of the linear module. An L-plate is arranged on the rear end of the connecting frame. A gamma-ray source is arranged on the horizontal plate of the L-plate, with the collimation hole of the gamma-ray source facing downwards. A detector is arranged on the vertical plate of the L-plate, directly below the gamma-ray source, with the probe of the detector facing upwards. A shielding cover drive motor is fixed on the horizontal plate of the L-plate. The output shaft of the shielding cover drive motor passes through the horizontal plate, and a movable shielding cover is fixed on its extended end. The movable shielding cover is located between the probe and the collimation hole.

[0005] The calibration component is located on the rear side of the support. The calibration component includes a motor, a standard plate protective cover, and a standard plate support plate. The motor is vertically mounted and fixed to the top surface of the support. The standard plate protective cover is fixed to the top surface of the motor housing. A sealed cavity is provided inside the standard plate protective cover. A flared notch communicating with the sealed cavity is provided at the front end of the standard plate protective cover. The output shaft of the motor extends into the sealed cavity, and a standard plate support plate is mounted on the output shaft. The standard plate support plate is located inside the sealed cavity. Multiple sets of support frames are provided on the outer edge of the standard plate support plate and arranged along its circumference. One set of support frames is located in the flared notch. Each set of support frames includes two support plates. One end of each support plate is fixed to the edge of the standard plate support plate. The inner surface of the other end of each support plate is provided with a stepped surface.

[0006] The vertical plate of the L-plate is fixed on the connecting frame.

[0007] The linear module includes a servo motor, a base, and a slider. The servo motor and the base are both fixed on the top surface of the bracket. A longitudinally arranged lead screw is rotatably installed inside the base. The slider is threadedly connected to the lead screw. The output shaft of the servo motor is connected to one end of the lead screw via a coupling.

[0008] It also includes a workstation that is electrically connected to the output interface of the detector.

[0009] Each set of shelves is evenly distributed on the standard board shelf tray.

[0010] The collimation hole and the area formed by the probe are positioned opposite to the horn-shaped notch.

[0011] The top surface of the rollers of the feed roller conveyor is flush with the top surface of the rollers of the discharge roller conveyor.

[0012] The motor is a stepper motor.

[0013] The present invention has the following advantages: it has a compact structure, improves the detection efficiency of uranium density value, reduces detection cost, and is simple to operate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 for Figure 1 Top view;

[0016] Figure 3 This is a schematic diagram of the probe assembly.

[0017] Figure 4 This is a side view of the probe assembly;

[0018] Figure 5This is a schematic diagram of the calibration component.

[0019] Figure 6 This is a structural schematic diagram of a standard plate protective cover;

[0020] Figure 7 This is a schematic diagram of the structure of the standard plate shelf tray;

[0021] Figure 8 This is a schematic diagram of the support structure;

[0022] In the diagram, 1-feed roller conveyor, 2-support, 3-discharge roller conveyor, 4-detector assembly, 5-calibration assembly, 6-linear module, 7-detector, 8-gamma-ray radiation source, 9-connecting frame, 10-L-plate, 11-shielding cover drive motor, 12-movable shielding cover, 13-motor, 14-standard plate protective cover, 15-standard plate shelf, 16-sealed cavity, 18-shelf, 19-step surface, 20-servo motor, 21-base, 22-slider, 23-roller, 24-standard nuclear fuel plate, 25-nuclear fuel plate to be tested, 26-probe. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description:

[0024] like Figures 1-8 As shown, a device for detecting the uniformity of uranium in a nuclear material plate includes a feed roller conveyor 1, a support 2, and an discharge roller conveyor 3 arranged sequentially from left to right. A detector assembly 4 and a calibration assembly 5 are respectively mounted on the front and rear ends of the support 2. The detector assembly 4 is located in front of the feed roller conveyor 1 and includes a linear module 6, a detector 7, and a gamma-ray emission source 8. The linear module 6 is mounted on the top surface of the support 2 and is arranged longitudinally. A connecting frame 9 is fixed to the slider 22 of the linear module 6, and a connecting frame 9 is mounted on the rear end of the connecting frame 9. There is an L-plate 10, the vertical plate of the L-plate 10 is fixed on the connecting frame 9, a gamma-ray source 8 is set on the horizontal plate of the L-plate 10, the collimation hole of the gamma-ray source 8 is set downward, a detector 7 is set on the vertical plate of the L-plate 10, the detector 7 is set directly below the gamma-ray source 8, the probe 26 of the detector 7 is set upward, a shielding cover drive motor 11 is fixed on the horizontal plate of the L-plate 10, the output shaft of the shielding cover drive motor 11 passes through the horizontal plate, and a movable shielding cover 12 is fixed on the extended end, the movable shielding cover 12 is set between the probe 26 and the collimation hole.

[0025] The calibration component 5 is located on the rear side of the bracket 2. The calibration component 5 includes a motor 13, a standard plate protective cover 14, and a standard plate support tray 15. The motor 13 is a stepper motor, vertically mounted and fixed to the top surface of the bracket 2. The standard plate protective cover 14 is fixed to the top surface of the motor 13 housing. A sealed cavity 16 is provided inside the standard plate protective cover 14. A flared notch communicating with the sealed cavity 16 is provided at the front end of the standard plate protective cover 14. The output shaft of the motor 13 extends into the sealed cavity 16, and the output... A standard plate support tray 15 is installed on the output shaft. The standard plate support tray 15 is located in the sealed cavity 16. Multiple sets of support racks are provided on the outer edge of the standard plate support tray 15 and arranged along its circumference. Each set of support racks is evenly distributed on the standard plate support tray 15. One set of support racks is located in the flared notch. Each set of support racks includes two support plates 18. One end of each of the two support plates 18 is fixed to the edge of the standard plate support tray 15. The inner side of the other end of each of the two support plates 18 is provided with a stepped surface 19.

[0026] The linear module 6 includes a servo motor 20, a base 21, and a slider 22. Both the servo motor 20 and the base 21 are fixed to the top surface of the bracket 2. A longitudinally arranged lead screw is rotatably mounted inside the base 21. The slider 22 is threaded onto the lead screw. The output shaft of the servo motor 20 is connected to one end of the lead screw via a coupling. The area formed by the collimation hole and the probe 26 is positioned opposite to the flared notch.

[0027] It also includes a workstation machine, which is electrically connected to the output interface of the detector 7, and the top surface of the roller 23 of the feed roller conveyor 1 is flush with the top surface of the roller 23 of the discharge roller conveyor 3.

[0028] The working process of this invention is as follows:

[0029] S1. The calibration of the standard nuclear fuel plate involves the following steps:

[0030] S11. The operator places the standard nuclear fuel plate 24 with a known uranium density value on the two stepped surfaces 19 of the shelf located at the horn-shaped notch, and the two shelf plates 18 support the standard nuclear fuel plate 24.

[0031] S12. The operator turns on motor 13, which drives the standard plate shelf 15 to rotate at a certain angle so that the next empty shelf can enter the funnel-shaped notch. Once in place, the operator places another standard nuclear fuel plate with a known uranium density value on the empty shelf.

[0032] S13. The operator repeats steps S11 to S12 to place the standard nuclear fuel plates with different uranium density values ​​on the respective shelves.

[0033] S14. The operator turns on the servo motor 20, which drives the lead screw to rotate. The slider 22 moves backward along the lead screw. When the standard nuclear fuel plate 24 located in the horn-shaped notch enters the area formed by the probe 26 and the collimation hole, the operator turns off the servo motor 20.

[0034] S15. The operator opens the shielding cover drive motor 11. The shielding cover drive motor 11 drives the movable shielding cover 12 to rotate a certain angle. After it is in place, the shielding cover drive motor 11 is closed. At this time, the gamma rays emitted by the gamma ray source 8 pass through the standard nuclear fuel plate 24. At this time, the detector 7 receives the number of transmitted gamma rays that are transmitted to the bottom of the standard nuclear fuel plate 24. Then the detector 7 converts the number of transmitted gamma rays into an electrical signal and transmits it to the host computer.

[0035] S16. The operator turns on the motor 13. The motor 13 drives the standard plate shelf 15 to rotate at a certain angle. The standard plate shelf 15 transfers the second standard nuclear fuel plate on it to the horn-shaped notch. Repeat step S15. The detector 7 converts the number of transmitted γ rays corresponding to the second standard nuclear fuel plate into an electrical signal and transmits it to the host computer.

[0036] S17. Repeat step S16 multiple times to obtain the correspondence between standard nuclear fuel plates with different uranium density values ​​and the number of transmitted gamma rays in the host computer. Based on this relationship, the least squares method is used to fit the relationship between the number of transmitted gamma rays and the uranium density value, and the mapping relationship is fitted, thus finally realizing the calibration of the standard nuclear fuel plates.

[0037] S2. The specific steps for detecting the uranium density value of the nuclear fuel plate to be tested are as follows:

[0038] S21. The operator controls the servo motor 20 to reverse, the servo motor 20 drives the lead screw to reverse, and the slider 22 moves forward along the lead screw. When the area formed by the probe 26 and the collimation hole is between the roller 23 of the feed roller conveyor 1 and the roller 23 of the discharge roller conveyor 3, the operator turns off the servo motor 20.

[0039] S22. The operator opens the feed roller conveyor 1 and the discharge roller conveyor 3. Each roller 23 in the feed roller conveyor 1 and the discharge roller conveyor 3 rotates clockwise.

[0040] S23. The operator places the nuclear fuel plate to be tested on the roller 23 of the feed roller conveyor 1. The roller 23 conveys the nuclear fuel plate to be tested from left to right. After the nuclear fuel plate to be tested passes through the area formed by the probe 26 and the collimation hole, the nuclear fuel plate to be tested moves to the roller 23 of the discharge roller conveyor 3. The roller 23 conveys the tested nuclear fuel plate out. When the nuclear fuel plate to be tested enters the area formed by the collimation hole and the probe 26, the gamma rays emitted by the gamma ray source 8 pass through the nuclear fuel plate to be tested. The detector 7 receives the number of transmitted gamma rays that are transmitted to the bottom of the nuclear fuel plate to be tested. At the same time, the detector 7 converts the number of transmitted gamma rays into an electrical signal and transmits it to the host computer. Using the mapping relationship in step S17, the uranium density value of the nuclear fuel plate to be tested can be calculated, and the uranium uniformity on the panel can be detected. Therefore, there is no need for expensive detection equipment to perform the detection. The detection can be performed by this detection device, which greatly saves the detection cost.

[0041] S24. The operator can repeat step S23 to continuously detect the uranium density value of multiple nuclear fuel plates to be tested. Compared with the traditional testing method, which requires a lot of time to position the tooling to be tested, this testing device greatly shortens the testing time and enables continuous testing, thus greatly improving the detection efficiency of uranium density value of nuclear fuel plates.

[0042] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for detecting the uniformity of uranium in nuclear material plates, characterized in that: It includes a feed roller conveyor (1), a support (2), and a discharge roller conveyor (3) arranged sequentially from left to right. A detector assembly (4) and a calibration assembly (5) are respectively arranged on the front and rear ends of the support (2). The detector assembly (4) is located on the front side of the feed roller conveyor (1). The detector assembly (4) includes a linear module (6), a detector (7), and a gamma-ray emission source (8). The linear module (6) is located on the top surface of the support (2). The linear module (6) is arranged front and rear. A connecting frame (9) is fixed on the slider (22) of the linear module (6). The rear end of the connecting frame (9) An L-plate (10) is provided on the upper part of the L-plate (10). A gamma-ray source (8) is provided on the horizontal plate of the L-plate (10). The collimation hole of the gamma-ray source (8) is set downward. A detector (7) is provided on the vertical plate of the L-plate (10). The detector (7) is set directly below the gamma-ray source (8). The probe (26) of the detector (7) is set upward. A shielding cover drive motor (11) is fixed on the horizontal plate of the L-plate (10). The output shaft of the shielding cover drive motor (11) passes through the horizontal plate and a movable shielding cover (12) is fixed on the extended end. The movable shielding cover (12) is set between the probe (26) and the collimation hole. The calibration component (5) is located on the rear side of the bracket (2). The calibration component (5) includes a motor (13), a standard plate protective cover (14), and a standard plate support plate (15). The motor (13) is vertically arranged and fixed on the top surface of the bracket (2). The standard plate protective cover (14) is fixed on the top surface of the motor (13) housing. A sealed cavity (16) is provided inside the standard plate protective cover (14). A flared notch communicating with the sealed cavity (16) is provided on the front end of the standard plate protective cover (14). The output shaft of the motor (13) extends into the sealed cavity (16), and the standard plate support plate (15) is installed on the output shaft. The standard plate support plate (15) is located in the sealed cavity. 16) Inside, multiple sets of shelving are provided on the outer edge of the standard plate shelving tray (15) along its circumference. One set of shelving is located in the horn-shaped notch. Each set of shelving includes two shelving plates (18). One end of each shelving plate (18) is fixed to the edge of the standard plate shelving tray (15). The inner side of the other end of each shelving plate (18) is provided with a stepped surface (19). It is known that standard nuclear material plates with different uranium density values ​​are placed on each shelving. The γ-ray emitted by the γ-ray radiation source passes through the standard nuclear material plate. The detector receives the number of transmitted γ-rays transmitted to the bottom of the standard nuclear material plate and fits the relationship between the number of transmitted γ-rays and the uranium density value. The linear module (6) includes a servo motor (20), a base (21), and a slider (22). The servo motor (20) and the base (21) are both fixed on the top surface of the bracket (2). A lead screw is rotatably installed in the base (21) and is threaded onto the lead screw. The output shaft of the servo motor (20) is connected to one end of the lead screw via a coupling. Each set of shelves is evenly distributed on the standard plate shelf tray (15); the area formed by the collimation hole and the probe (26) is set opposite to the horn-shaped notch.

2. The uranium uniformity detection device for nuclear material plates according to claim 1, characterized in that: The vertical plate of the L plate (10) is fixed on the connecting frame (9).

3. The uranium uniformity detection device for nuclear material plates according to claim 1, characterized in that: It also includes a workstation that is electrically connected to the output interface of the detector (7).

4. The uranium uniformity detection device for nuclear material plates according to claim 1, characterized in that: The top surface of the roller (23) of the feed roller conveyor (1) is flush with the top surface of the roller (23) of the discharge roller conveyor (3).

5. The uranium uniformity detection device for nuclear material plates according to claim 1, characterized in that: The motor (13) is a stepper motor.

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