Analysis and test device and spent fuel reprocessing system

Abstract

An analysis and test device and a spent fuel reprocessing system. The analysis and test device comprises: a base (1); a shielding body (7), which is fixed to the base (1) and comprises a main body portion (71) and a sealing portion (72), the sealing portion (72) being configured to seal an opening (711) in the main body portion (71) and being capable of being opened and closed; an accelerator assembly (3) and a radiation source (4), wherein the accelerator assembly (3) is located on one side of the shielding body (7) in a first direction (x) and is movably mounted on the base (1) in the first direction (x), and the radiation source (4) is fixed to one side of the accelerator assembly (3) in the first direction (x) and is located in the shielding body (7); a measurement assembly (5), which is fixed in the shielding body (7), is located, in the first direction (x), on the side of the radiation source (4) away from the accelerator assembly (3), and is configured to accommodate a test object, so as to implement a test mode; a calibration assembly (6), which is detachably mounted in the shielding body (7) by means of the opening (711), is located, in the first direction (x), on the side of the radiation source (4) away from the accelerator assembly (3), and is configured to accommodate a calibration object, so as to implement a calibration mode; and a detector assembly (8), which is arranged on one side of the shielding body (7) in a second direction (y) and is movably mounted on the base (1) in the first direction (x).

Description

Analytical detection equipment and spent fuel reprocessing system

[0001] Cross-references to related applications

[0002] This disclosure is based on and claims priority to the Chinese application with application number 202311873405.1 and filing date December 29, 2023. The disclosed content of the Chinese application is hereby introduced into this disclosure as a whole. Technical Field

[0003] The present disclosure relates to the technical field of radioactive material analysis and detection, and in particular to an analysis and detection device and a spent fuel post-processing system. Background Art

[0004] Traditional applications of radioactive material analysis and testing strictly distinguish between calibration mode and operating mode (i.e., testing mode). Calibration mode involves using a calibration object with known physical and chemical composition obtained through laboratory testing or precision testing as the test object during non-operating conditions. This object is used to verify the test system and test methods and serves as a key parameter input into the test system. Operating mode involves inputting a test object with unknown composition into the system's measurement points for testing. Therefore, the entire test system often switches between calibration and operating modes, requiring system downtime and manual switching between the test object and calibration object. This can be lengthy and requires a series of complex manual operations.

[0005] For certain industries producing large quantities of industrial products, the test system is only the front-end component, yet it is a critical link in the entire production process. Prolonged downtime can impact the entire production process. Furthermore, in systems that test toxic or radioactive objects, switching between two scenarios can also expose analysts and operators to radiation hazards. Summary of the Invention

[0006] The embodiments of the present disclosure provide an analysis and detection device and a spent fuel reprocessing system, which can improve the detection and maintenance efficiency of the analysis device.

[0007] A first aspect of the present disclosure provides an analysis and detection device, comprising:

[0008] base;

[0009] A shielding body is fixed to the base, the shielding body is used for radiation protection and includes a main body and a closing part, the main body is provided with an opening, and the closing part is used to close the opening and can be opened and closed;

[0010] An accelerator assembly and a radiation source, wherein the accelerator assembly is located on one side of the shielding body along a first direction and is movably mounted on a base along the first direction; the radiation source is fixed to one side of the accelerator assembly along the first direction and is located within the shielding body, and is used to receive radiation emitted by the accelerator assembly to generate particles;

[0011] A measuring assembly is fixed in the shielding body and is located on a side of the radiation source away from the accelerator assembly along the first direction, and is used to accommodate the object to be tested to realize the detection mode;

[0012] a calibration assembly, detachably mounted in the shield through the opening and located on a side of the radiation source away from the accelerator assembly along the first direction, for accommodating a calibration object to implement a calibration mode; and

[0013] The detector assembly is arranged on one side of the shielding body along a second direction perpendicular to the first direction, and is movably mounted on the base along the first direction, for receiving particles after interacting with the object to be tested or the calibration object to analyze the type and content of the object to be tested or the calibration object.

[0014] In some embodiments, when the calibration component needs to be disassembled, the closing portion is in an open state; in the calibration mode or the detection mode, the closing portion is in a closed state.

[0015] In some embodiments, the opening is located on the top or side of the main body.

[0016] In some embodiments,

[0017] In the calibration mode, the calibration component is located between the measurement component and the radiation source along a first direction;

[0018] In test mode, the calibration assembly is removed.

[0019] In some embodiments, in the calibration mode, the radiation source has a first distance from the calibration component along the first direction; in the detection mode, the radiation source has a second distance from the measurement component along the first direction, and the first distance is equal to the second distance.

[0020] In some embodiments,

[0021] In the calibration mode, the detector assembly is aligned with the calibration assembly in a first direction; or

[0022] In the detection mode, the detector assembly is aligned with the measurement assembly in a first direction.

[0023] In some embodiments, the analysis and detection device further includes a linear motion platform mounted on the base, configured to drive the detector assembly to move along the first direction.

[0024] In some embodiments, the analysis and detection device further includes a second bracket, which is disposed on the base. The second bracket is provided with a slide, and the accelerator assembly is movably mounted on the slide along the first direction.

[0025] In some embodiments, the measuring component includes a measuring slot for accommodating the object to be tested, the calibration component includes a calibration slot for accommodating the calibration object, and the inner bottom surface of the shielding body is provided with two positioning grooves, which are used to position the measuring slot and the calibration slot respectively, and at least the calibration slot is detachable relative to the positioning groove.

[0026] In some embodiments, a drift tube extending along a first direction is provided on a side of the accelerator assembly for defining a path of the ray. The drift tube extends into the shielding body and the radiation source is fixed at an end thereof.

[0027] In some embodiments, the analysis and detection device further comprises:

[0028] A first driving component, configured to drive the accelerator assembly to move in a first direction; and / or

[0029] A second driving component is used to drive the detector assembly to move along the first direction; and / or

[0030] The third driving component is used to drive the accelerator assembly and the detector assembly to move along the first direction.

[0031] A second aspect of the present disclosure provides a spent fuel reprocessing system, comprising the analysis and detection device of the above embodiment.

[0032] Based on the above technical solution, the shielding body is fixed in position, and the calibration assembly is assembled and disassembled by opening and closing the sealing portion. The structure is simple and easy to set up. In calibration mode or detection mode, the position of the accelerator assembly, radiation source, and detector assembly can be conveniently adjusted to meet the requirements of the mode. This allows the analytical detection device to flexibly switch between calibration mode and detection mode, facilitating detection and maintenance, and reducing the impact of long-term shutdown of the analytical detection device for calibration on the efficiency of the entire production system. Moreover, all components do not involve movement along the second direction, which can reduce the size of the analytical detection device along the second direction. The height in the third direction can also be reduced without the need for a dual-degree-of-freedom platform. The overall structure is simple and compact, occupies little space, and is relatively low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of this application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the drawings:

[0034] FIG1 is a front view of some embodiments of the analysis and detection device disclosed herein.

[0035] FIG2 is a side view of some embodiments of the analysis and detection device of the present disclosure in a detection mode.

[0036] FIG3 is a top view of some embodiments of the analysis and detection device disclosed herein.

[0037] FIG4 is a schematic diagram of aligning the detector assembly with the calibration assembly in the calibration mode.

[0038] Figure 5 is a side view in calibration mode.

[0039] Figure 6 is a schematic diagram of removing the calibration component.

[0040] FIG. 7 is a schematic diagram illustrating alignment of the detector assembly and the measurement assembly in a detection mode.

[0041] FIG8 is a schematic diagram of bringing a radiation source close to a measurement component in a detection mode.

[0042] Explanation of the accompanying symbols: 1. Base; 2. Linear motion platform; 21. Screw; 22. Slider; 23. Force-applying member; 24. First bracket; 3. Accelerator assembly; 30. Drift tube; 4. Radiation source; 5. Measurement assembly; 6. Calibration assembly; 7. Shielding body; 71. Main body; 711. Opening; 712. Positioning groove; 72. Closing part; 8. Detector assembly; 81. Shell; 82. Detector; 9. Second bracket; x, first direction; y, second direction; z, third direction. DETAILED DESCRIPTION

[0043] The present disclosure is described in detail below. In the following paragraphs, various aspects of the embodiments are defined in more detail. Each aspect defined in this manner may be combined with any other aspect or aspects unless expressly stated not to be combinable. In particular, any feature considered to be preferred or advantageous may be combined with one or more other features considered to be preferred or advantageous.

[0044] The terms "first" and "second" appearing in this disclosure are only for the convenience of description to distinguish different components with the same name, and do not indicate a priority or primary and secondary relationship.

[0045] In the description of the present disclosure, the directions or positional relationships indicated by “upper”, “lower”, “top”, “bottom”, “front”, “back”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present disclosure. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present disclosure.

[0046] The present disclosure provides an analytical detection device having a calibration mode and a detection mode. In some embodiments, as shown in FIG1 to FIG8 , the analytical measurement device of the present disclosure includes:

[0047] Base 1;

[0048] The shielding body 7 is fixed to the base 1. The shielding body 7 is used for radiation protection and includes a main body 71 and a closing portion 72. The main body 71 has an opening 711. The closing portion 72 is used to close the opening 711 and can be opened and closed.

[0049] An accelerator assembly 3 and a radiation source 4, wherein the accelerator assembly 3 is located on one side of the shielding body 7 along a first direction x and is movably mounted on the base 1 along the first direction x. The radiation source 4 is fixed to one side of the accelerator assembly 3 along the first direction x and is located within the shielding body 7, and is configured to receive radiation emitted by the accelerator assembly 3 to generate particles.

[0050] The measuring assembly 5 is fixed in the shielding body 7 and is located on a side of the radiation source 4 away from the accelerator assembly 3 along the first direction x, and is used to accommodate the object to be tested to realize the detection mode;

[0051] a calibration assembly 6 detachably mounted in the shield 7 through the opening 711 and located on a side of the radiation source 4 away from the accelerator assembly 3 along the first direction x, for accommodating a calibration object to implement a calibration mode; and

[0052] The detector assembly 8 is arranged on one side of the shielding body 7 along the second direction y perpendicular to the first direction x, and is movably mounted on the base 1 along the first direction x, for receiving particles after interacting with the object to be tested or the calibration object to analyze the type and content of the object to be tested or the calibration object.

[0053] Specifically, the base 1 may be a flat plate structure, for example, made of steel or other materials, wherein the first direction x and the second direction y are both located in a horizontal plane and perpendicular to each other, and the third direction z is perpendicular to the first direction x and the second direction y, that is, perpendicular to the horizontal plane.

[0054] In both the calibration mode and the working mode, the shielding body 7 is required to fully surround the area where the measuring component 5, the calibration component 6, and the radiation source 4 are located. For example, the shielding body 7 may be a rectangular parallelepiped door-shaped structure, or an arched door-shaped structure at the top. For example, the main body 71 of the shielding body 7 may be a hollow rectangular parallelepiped structure with one or both ends penetrated. For example, the shielding body 7 has a hollow cavity inside to accommodate the measuring component 5 and the calibration component 6. The position of the shielding body 7 remains unchanged in the calibration mode and the detection mode, and the calibration component 6 and the object to be tested are taken in and out by opening and closing the closing portion 72. The closing portion 72 may be a flat plate or an arched door-shaped structure.

[0055] As shown in Figures 1 and 2 , the accelerator assembly 3 is configured to emit radiation. A drift tube 30 is provided on one side of the accelerator assembly along a first direction x. The drift tube 30 extends in the first direction x and is used to guide the radiation beam. A radiation source 4 is located at the end of the drift tube 30 distal from the accelerator assembly 3 and is configured to receive radiation emitted by the accelerator assembly 3 and generate particles. The accelerator assembly 3 is movably mounted on the base 1 along the first direction x to adjust the distance between the radiation source 4 and the measurement assembly 5 or calibration assembly 6 along the first direction x. The accelerator assembly 3 can be mounted directly or indirectly on the base 1.

[0056] The measurement assembly 5 may include a measurement tank for accommodating an object to be detected, and the calibration assembly 6 may include a calibration tank for accommodating a calibration object. The object to be detected and the calibration object may be liquids. The measurement assembly 5 and the calibration assembly 6 are both located along the first direction x on a side of the radiation source 4 away from the accelerator assembly 3. The measurement assembly 5 and the calibration assembly 6 may be arranged side by side along the first direction x and may have the same dimensions.

[0057] In one installation method, as shown in FIG6 , the inner bottom surface of the shield 7 is provided with two positioning grooves 712. The two positioning grooves 712 can be arranged side by side along the first direction x, and are used to position the measurement slot and the calibration slot, respectively. This method has a simple structure and is easy to assemble and disassemble. To adapt the measurement slot or the calibration slot to the height of the radiation source 4 and the detector assembly 8, the bottom surface of the shield 7 can be separated from the base 1 by a preset distance. Alternatively, if the shield 7 contacts the upper surface of the base 1, the shield 7 can be provided without a bottom surface, and the two positioning grooves 712 can be provided directly on the upper surface of the base 1. In this case, the shield 7 can also be a cylindrical body with an opening 711 at one end but no closure portion 72. The opening 711 is covered by the two positioning grooves 712 provided on the upper surface of the base 1 to achieve a protective effect.

[0058] In another installation method, a mounting seat is provided in the area within the shielding body 7, and the measuring component 5 and the calibration component 6 can be provided on the mounting seat so that they can be reliably maintained in position and at a suitable height for easy installation.

[0059] The calibration tank and the measuring tank can be rectangular tanks, whose length direction is consistent with the second direction y, and can be made of metal material. In the calibration mode, the radiation source 4 is located on one side of the calibration tank along the first direction x, and the particles generated by the radiation source 4 can enter the calibration object such as liquid through the metal side wall of the calibration tank, and then be received by the detector assembly 8 to analyze the type and content of the calibration object. Usually, in the calibration mode, the measuring tank does not contain the test object. Or if there is a test object in the measuring tank, in order to prevent the test object from being affected, a shielding layer can be set on the outer surface of the calibration tank away from the radiation source 4 along the first direction x. In the detection mode, the radiation source 4 is located on one side of the measuring tank along the first direction x, and the particles generated by the radiation source 4 can enter the test object such as liquid through the metal side wall of the measuring tank.

[0060] The detector assembly 8 is provided on one side of the shielding body 7 along the second direction y and is movably mounted on the base 1 along the first direction x, for adjusting the position of the detector assembly 8 along the first direction x so as to align with the measuring assembly 5 or the calibration assembly 6 .

[0061] Taking the detection mode (i.e., the working mode) as an example, the rays emitted by the accelerator component 3 enter the radiation source 4 through the drift tube 30. The radiation source 4 will generate neutrons and other particles, which will enter the object under test in the measurement component 5. Finally, the detector component 8 receives the neutrons and other particles after interacting with the object under test or the calibration object to analyze the type and content of the object under test based on the number of particles.

[0062] In this embodiment, the shielding body 7 is fixed in position, and the calibration assembly 6 is assembled and disassembled by opening and closing the closure portion 72. The structure is simple and easy to set up. In the calibration mode or detection mode, the accelerator assembly 3, the radiation source 4, and the detector assembly 8 can be conveniently adjusted to the position corresponding to the measurement assembly 5 or the calibration assembly 6 to meet the requirements of the mode. This allows the analytical detection device to be flexibly switched between the calibration mode and the detection mode, facilitating detection and maintenance, and reducing the impact of long-term shutdown of the analytical detection device for calibration on the efficiency of the entire production system. In addition, all components do not involve movement along the second direction y, which can reduce the size of the analytical detection device along the second direction y. The height in the third direction z can also be reduced without setting a dual-degree-of-freedom platform. The overall structure is simple and compact, occupies little space, and is relatively low in cost.

[0063] Furthermore, if the object being tested is toxic or radioactive, it can be protected by the shielding body 7 in both the calibration mode and the detection mode, thereby ensuring that the operator is protected from harm.

[0064] In some embodiments, the accelerator assembly 3 and the detector assembly 8 move independently of each other, and their positions can be adjusted separately to achieve optimal operating positions for the radiation source 4 and the detector assembly 8, thereby achieving better detection results. In some embodiments, the accelerator assembly 3 and the detector assembly 8 can move simultaneously and synchronously to adjust the accelerator assembly 3, the radiation source 4, and the detector assembly 8 from a position corresponding to the calibration assembly 6 to a position corresponding to the measurement assembly 5. During mode switching, the accelerator assembly 3 and the detector assembly 8 have the same displacement along the first direction x.

[0065] In some embodiments, when the calibration component 6 needs to be disassembled, the closing portion 72 is in an open state; in the calibration mode or the detection mode, the closing portion 72 is in a closed state.

[0066] As shown in Figure 4, when the calibration component 6 needs to be installed, the closing portion 72 is opened. The closing portion 72 can adopt a door structure and rotate around the hinge axis with the main body 71; or the closing portion 72 adopts a push-pull structure, exposing the opening 711 when pushed outward; or the closing portion 72 is directly separated from the main body 71. At this time, the calibration component 6 can be installed, and the closing portion 72 is used to close the opening 711 for protection in order to perform calibration. As shown in Figure 5, after the calibration mode is completed, the closing portion 72 is opened and the calibration component 6 can be removed. In the calibration state or detection mode, the closing portion 72 closes the opening 711, completely surrounding the location of the radiation source 4, the measurement component 5 and the calibration component 6 to protect the radiation.

[0067] This embodiment can conveniently disassemble and assemble the calibration component 6 by opening and closing the sealing portion 72 to switch between the detection mode and the calibration mode. Moreover, when operating in these two modes, the shielding body 7 can play a protective role to prevent the leakage of radioactive substances.

[0068] 2 and 3 , the opening 711 is located at the top of the main body 71. For example, the entire top of the main body 71 may be configured as the opening 711, and the closing portion 72 may be a plate-like structure that covers the opening 711.

[0069] In this embodiment, the sealing portion 72 is arranged on the top of the shielding body 7, avoiding the location of the radiation source 4 and the detector assembly 8. When the calibration assembly 6 is placed, it will not be affected by the measuring assembly 5. When the calibration assembly 6 containing liquid is placed, it is not easy to spill. It also has an optimal operating angle when disassembling the calibration assembly 6.

[0070] In some embodiments, the opening 711 is located on a side of the main body 71 , for example, may be disposed on a side of the shielding body 7 away from the detector assembly 8 .

[0071] In some embodiments, as shown in FIG4 , in the calibration mode, the calibration component 6 is located between the measurement component 5 and the radiation source 4 along the first direction x; as shown in FIG6 , in the detection mode, the calibration component 6 is removed.

[0072] In this embodiment, the installation position of the calibration component 6 is set between the measurement component 5 and the radiation source 4 along the first direction x. In this way, in the calibration mode, the radiation source 4 is closer to the calibration component 6, and the measurement component 5 is located on the side away from the radiation source 4; in the detection mode, after the calibration component 6 is removed, the radiation source 4 is brought close to the measurement component 5 along the first direction x, and the object to be detected can be detected. Therefore, the analysis and detection device can flexibly and conveniently switch between the calibration mode and the detection mode.

[0073] In some embodiments, in calibration mode, the radiation source 4 has a first distance from the calibration component 6 along the first direction x; in detection mode, the radiation source 4 has a second distance from the measurement component 5 along the first direction x, and the first distance is equal to the second distance.

[0074] As shown in FIG4 , when it is necessary to enter the calibration mode, the distance between the radiation source 4 and the calibration component 6 is relatively close. As shown in FIG6 , after the calibration is completed, the calibration component 6 is removed. At this time, the distance between the radiation source 4 and the measurement component 5 along the second direction y is relatively far. The detector 82 and the measurement component 5 are also in a staggered state along the first direction x. As shown in FIG7 , when it is necessary to enter the detection mode, the detector component 8 is moved along the first direction x to align with the measurement component 5. And as shown in FIG8 , the accelerator component 3 is moved along the first direction x toward the direction close to the measurement component 5 until the distance between the radiation source 4 and the measurement component 5 in the first direction x is consistent with the distance between the radiation source 4 and the calibration component 6 in the calibration mode.

[0075] This embodiment can make the distance between the radiation source 4 and the object to be detected or the calibration object along the first direction x consistent in the detection mode and the calibration mode, ensuring the same test conditions in the two modes, and improving the detection accuracy of the object to be detected.

[0076] In some embodiments, in the calibration mode, the detector assembly 8 is aligned with the calibration assembly 6 in the first direction x; or in the detection mode, the detector assembly 8 is aligned with the measurement assembly 5 in the first direction x.

[0077] Specifically, as can be seen from Figure 3, the detector assembly 8 includes a housing 81 and a detector 82. The detector 82 is disposed within the housing 81, which is made of a shielding material. In the top views such as Figure 3, the rectangular frame at the top of the detector assembly 8 is only for the purpose of clearly showing the internal structure of the detector 82.

[0078] In the calibration mode, the detector 82 is aligned with the calibration component 6 in the first direction x, that is, the detector 82 and the calibration component 6 are located on the same straight line, and the straight line extends along the second direction y; in the detection mode, the detector 82 is aligned with the measurement component 5 in the first direction x, that is, the detector 82 and the measurement component 5 are located on the same straight line, and the straight line extends along the second direction y.

[0079] This embodiment can match the positions of the radiation source 4 and the detector assembly 8 with the measurement assembly 5 or the calibration assembly 6 by moving at least one of the accelerator assembly 3 and the detector assembly 8 along the first direction x, so as to flexibly meet the position requirements of the main components in the calibration mode and the detection mode.

[0080] In some embodiments, as shown in FIG. 2 , the analysis and detection device further includes a linear motion platform 2 mounted on the base 1 for driving the detector assembly 8 to move along the first direction x.

[0081] This embodiment provides a linear motion platform 2 to place the detector assembly 8 at a suitable height, guide the detector assembly 8 to move smoothly along the first direction x, and accurately adjust the position of the detector assembly 8 in different working modes.

[0082] In some embodiments, as shown in FIG2 , the linear motion platform 2 includes:

[0083] A first bracket 24 is provided on the base 1;

[0084] A lead screw 21 is mounted on the first bracket 24 and is rotatable about its own axis, and the lead screw 21 extends along a first direction x; and

[0085] The slider 22 cooperates with the lead screw 21 to form a lead screw nut mechanism, and the slider 22 is movable along the first direction x;

[0086] The detector assembly 8 is connected above the slider 22 .

[0087] Specifically, a support frame can be provided above the slider 22 to facilitate mounting the larger detector assembly 8. A force-applying member 23, such as a handwheel, is provided at one end of the lead screw 21, which is located away from the accelerator assembly 3 along the first direction x. The force-applying member 23, such as a handwheel, is configured to receive an external force to rotate the lead screw 21, thereby driving the slider 22 to move along the lead screw 21 and thereby moving the detector assembly 8 along the first direction x. Optionally, the lead screw 21 can also be driven automatically.

[0088] This embodiment is provided with a screw-nut mechanism, which can realize the smooth movement of the detector assembly 8 along the first direction x and facilitate continuous fine-tuning, and can more accurately align the detector 82 in the detector assembly 8 with the measurement assembly 5 or the calibration assembly 6, thereby improving detection accuracy.

[0089] In some embodiments, as shown in FIG2 , the analysis and detection device further includes a second bracket 9 , which is disposed on the base 1 and has a slideway disposed thereon. The accelerator assembly 3 is movably mounted on the slideway along a first direction x. For example, the position of the accelerator assembly 3 can be adjusted manually or automatically.

[0090] This embodiment provides a second bracket 9 to support the accelerator assembly 3, allowing the accelerator assembly 3 to be positioned at an appropriate height. Guided by the slideway, the accelerator assembly 3 can be smoothly moved along the first direction x, precisely adjusting the position of the accelerator assembly 3 in different operating modes. Furthermore, if maintenance is required on the accelerator assembly 3, the accelerator assembly 3 can be pushed outward relative to the second bracket 9 along the first direction x for inspection and repair.

[0091] In some embodiments, the second bracket 9 is disposed on the linear motion platform 2. The linear motion platform 2 drives the second bracket 9 and the accelerator assembly 3 and the detector assembly 8 to move synchronously along the first direction x.

[0092] In some embodiments, as shown in Figures 3 and 6 , the measurement assembly 5 includes a measurement slot for accommodating an object under test, and the calibration assembly 6 includes a calibration slot for accommodating a calibration object. The inner bottom surface of the shield 7 is provided with two positioning grooves 712 , which are used to position the measurement slot and the calibration slot, respectively. At least the calibration slot is removable relative to the positioning grooves 712 .

[0093] Among them, the two positioning grooves 712 are arranged side by side along the first direction x, and only the bottom areas of the measuring groove and the calibration groove are arranged in the positioning groove 712 to achieve positioning, and the upper and middle areas are exposed outside the positioning groove 712. The calibration groove is detachable. When it is necessary to switch to the detection mode, as shown in Figure 6, the calibration groove needs to be removed, or the calibration groove containing different calibration objects needs to be replaced conveniently. Different calibration objects can be solutions of different concentrations. Furthermore, the measuring groove is also set to be detachable, or the measuring groove can also be fixed in the positioning groove 712 and cannot be detached. A clearance fit can be adopted between the measuring groove, the calibration groove and the positioning groove 712, which is convenient for disassembly and can also ensure the positioning effect.

[0094] This embodiment allows for easy installation and removal of the calibration tank, further improving the efficiency of switching between calibration and detection modes, or facilitating replacement of different calibration tanks, thereby improving calibration efficiency. Furthermore, this method of installing the measurement tank and calibration tank is structurally simple and does not require additional mounting components.

[0095] Optionally, a mounting base is provided in the area within the shielding body 7, upon which the measurement assembly 5 and calibration assembly 6 can be mounted, ensuring reliable positional retention and maintaining the measurement assembly 5 and calibration assembly 6 at an appropriate height. For example, the calibration assembly 6 may further include a third bracket that is removably mounted, and to which the calibration slot is removably mounted. The mounting base includes a vertical plate provided with hooks or supports for hanging or placing the third bracket on the vertical plate, facilitating the complete removal of the calibration assembly 6. The calibration slot is removably mounted to the third bracket, allowing for easy replacement of the calibration slot to accommodate different calibration objects, thereby improving calibration efficiency.

[0096] In some embodiments, a drift tube 30 extending along a first direction x is provided on the side of the accelerator assembly 3 to define the path of the radiation. The drift tube 30 extends into the shield 7, with the end thereof secured to the radiation source 4. This structure facilitates ensuring the positional relationship between the radiation source 4 and the drift tube 30, allowing the radiation within the drift tube 30 to reliably enter the radiation source 4 to generate particles, thereby improving the operational reliability of the analysis and detection device.

[0097] In some embodiments, the analysis and detection device further comprises:

[0098] A first driving component, configured to drive the accelerator assembly 3 to move along a first direction x; and / or

[0099] A second driving component is used to drive the detector assembly 8 to move along the first direction x; and / or,

[0100] The third driving component is used to drive the accelerator assembly 3 and the detector assembly 8 to move along the first direction x.

[0101] The first driving component, the second driving component and the third driving component are all linear driving components, such as electric push rods, cylinders or hydraulic cylinders, or driving components that convert rotational motion into linear motion.

[0102] In this embodiment, the accelerator assembly 3 and the detector assembly 8 are driven to move along the first direction x by the first driving component and the second driving component respectively, or the accelerator assembly 3 and the detector assembly 8 are driven to move along the first direction x by the third driving component at the same time, thereby improving the degree of automation of switching between the calibration mode and the detection mode of the analysis and detection device, improving efficiency and control accuracy, and reducing manual intervention.

[0103] The specific working principle of the analysis and detection device disclosed in the present invention is described below.

[0104] As shown in Figure 4 , when the analysis and detection device needs to enter calibration mode, the sealing portion 72 is opened, the calibration assembly 6 is installed, and the detector 82 is aligned with the calibration assembly 6 in a first direction x. Figure 5 is a side view of the calibration mode, showing that the detector assembly 8 is generally closer to the accelerator assembly 3 in the first direction x. The sealing portion 72 is then closed to enable calibration mode operation.

[0105] As shown in FIG6 , after the calibration is completed, the sealing portion 72 is opened and the calibration component 6 is removed.

[0106] As shown in Figure 7 , when the analytical detection device enters detection mode, the detector assembly 8 is moved along the first direction x toward the side away from the accelerator assembly 3, so that the detector 82 is aligned with the measurement assembly 5 in the first direction x. As shown in Figure 8 , the accelerator assembly 3 is moved along the first direction x toward the side closer to the measurement assembly 5, so that the distance between the radiation source 4 and the measurement assembly 5 along the first direction x is equal to the distance between the radiation source 4 and the calibration assembly 6 along the first direction x during calibration mode. The sealing portion 72 is then closed, allowing the device to enter detection mode. Figure 2 shows a side view of the detection mode.

[0107] Secondly, the present disclosure provides a spent fuel reprocessing system, including the analysis and detection device of the aforementioned embodiment. Spent fuel refers to nuclear fuel discharged from a reactor after being burned to a certain extent. A spent fuel reprocessing system processes spent fuel from a reactor, separating useful elements (such as uranium and plutonium) from fission products and other substances for use in the manufacture of new nuclear fuel elements, achieving partial recycling of nuclear fuel, or extracting plutonium for use in nuclear weapons manufacturing.

[0108] The disclosed analytical detection device can be used to detect specific components in spent fuel. Because it can flexibly switch between calibration and detection modes, facilitating testing and maintenance, it can also minimize the impact of prolonged downtime for calibration on the overall operating efficiency of the spent fuel reprocessing system. Furthermore, because the test material is toxic or radioactive, the shield 7 protects the operator in both calibration and detection modes, ensuring safety.

[0109] The embodiments provided by the present disclosure are described in detail above. Specific embodiments are used herein to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is only used to help understand the method and core ideas of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present disclosure, several improvements and modifications can be made to the present disclosure, and these improvements and modifications also fall within the scope of protection of the claims of the present disclosure.

Claims

1. An analytical detection device, comprising: a base (1); a shielding body (7), fixed to the base (1), the shielding body (7) being used for radiation protection and comprising a main body portion (71) and a closing portion (72), the main body portion (71) being provided with an opening (711), the closing portion (72) being used for closing the opening (711) and being openable and closable; an accelerator assembly (3) and a radiation source (4), the accelerator assembly (3) being located on one side of the shielding body (7) along a first direction (x) and being movably mounted on the base (1) along the first direction (x), the radiation source (4) being fixed to one side of the accelerator assembly (3) along the first direction (x) and being located inside the shielding body (7), and being used for receiving the rays emitted by the accelerator assembly (3) to generate particles; a measurement assembly (5), fixed inside the shielding body (7) and located on one side of the radiation source (4) away from the accelerator assembly (3) along the first direction (x), and being used for accommodating an object to be inspected to achieve a detection mode; a calibration assembly (6), detachably mounted inside the shielding body (7) through the opening (711) and located on one side of the radiation source (4) away from the accelerator assembly (3) along the first direction (x), and being used for accommodating a calibration object to achieve a calibration mode; and a detector assembly (8), arranged on one side of the shielding body (7) along a second direction (y) perpendicular to the first direction (x) and movably mounted on the base (1) along the first direction (x), and being used for receiving the particles after acting on the object to be inspected or the calibration object to analyze the type and content of the object to be inspected or the calibration object.

2. The analysis and detection device according to claim 1, wherein, When it is necessary to disassemble and assemble the calibration assembly (6), the closing portion (72) is in an open state; in the calibration mode or the detection mode, the closing portion (72) is in a closed state.

3. The analysis and detection device according to claim 1 or 2, wherein The opening (711) is located at the top or side of the main body portion (71).

4. The analytical detection device according to any one of claims 1 to 3, wherein in the calibration mode, the calibration assembly (6) is located between the measurement assembly (5) and the radiation source (4) along the first direction (x); in the detection mode, the calibration assembly (6) is removed.

5. The analysis and detection device according to claim 4, wherein, In the calibration mode, there is a first distance between the radiation source (4) and the calibration assembly (6) along the first direction (x); in the detection mode, there is a second distance between the radiation source (4) and the measurement assembly (5) along the first direction (x), and the first distance is equal to the second distance.

6. The analytical detection device according to any one of claims 1 to 5, wherein in the calibration mode, the detector assembly (8) is aligned with the calibration assembly (6) in the first direction (x); or in the detection mode, the detector assembly (8) is aligned with the measurement assembly (5) in the first direction (x).

7. The analysis and detection device according to any one of claims 1 to 6 further includes a linear motion platform (2) installed on the base (1) for driving the detector assembly (8) to move along a first direction (x).

8. The analysis and detection device according to any one of claims 1 to 7 further includes a second bracket (9) provided on the base (1). A slideway is provided on the second bracket (9), and the accelerator assembly (3) is movably installed on the slideway along the first direction (x).

9. The analysis and detection device according to any one of claims 1 to 8, wherein, The measurement assembly (5) includes a measurement groove for accommodating the object to be inspected, and the calibration assembly (6) includes a calibration groove for accommodating the calibration object. Two positioning grooves (712) are provided on the inner bottom surface of the shielding body (7). The two positioning grooves (712) are respectively used for positioning the measurement groove and the calibration groove, and at least the calibration groove is detachable relative to the positioning groove (712).

10. The analysis and detection device according to any one of claims 1 to 9, wherein, A drift tube (30) extending along the first direction (x) is provided on the side of the accelerator assembly (3) for defining the path of the ray. The drift tube (30) extends into the shielding body (7) and its end fixes the radiation source (4).

11. The analysis and detection device according to any one of claims 1 to 10 further includes: A first driving member for driving the accelerator assembly (3) to move along the first direction (x); and / or A second driving member for driving the detector assembly (8) to move along the first direction (x); and / or A third driving member for driving the accelerator assembly (3) and the detector assembly (8) to move along the first direction (x).

12. A spent fuel reprocessing system includes the analysis and detection device according to any one of claims 1 to 11.

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