Fuel assembly deformation simulation device

Abstract

The invention discloses a fuel assembly deformation simulation device. The device comprises a supporting framework; the plurality of grillwork simulation pieces are sleeved on the supporting framework at intervals along the axial direction of the supporting framework; each positioning piece is respectively connected with the supporting framework and the grillwork simulation piece and limits the axial movement of the grillwork simulation piece along the supporting framework; the limiting pieces are inserted between the grillwork simulation piece and the supporting framework so as to adjust the radial relative position of the grillwork simulation piece and the supporting framework; and the plurality of simulation pipes are inserted into the plurality of grillwork simulation pieces. Full-size supporting force is provided through the supporting framework, the grillwork simulation piece simulates a real grillwork, the positioning piece positions the position of the grillwork simulation piece, the limiting piece adjusts deformation and torsion of the grillwork simulation piece, and the simulation pipe simulates a real fuel rod, so that bending and torsion deformation of each layer of the grillwork simulation piece of the fuel assembly can be flexibly adjusted. A complex deformation state in actual use is simulated, and the reliability and accuracy of a subsequent detection result are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power plant fuel assembly deformation inspection, and in particular to a fuel assembly deformation simulation device. Background Art

[0002] With the increase of technical means, a variety of underwater detection technologies are used to inspect the deformation of fuel assemblies. However, there are uncertainties in the detection accuracy and sensitivity of new detection technology solutions. The deformation of fuel assemblies may be S-shaped, C-shaped, or even superimposed with torsional deformation. Existing detection methods only use simple samples or theoretical calculations, and lack comprehensive detection of the complex deformation state of fuel assemblies, resulting in uncertainty in the accuracy and reliability of the detection results.

[0003] The existing verification method for the accuracy of fuel assembly deformation measurement mainly relies on the use of fuel assembly dummy parts with known size and shape. However, this method has the following technical problems:

[0004] (1) Limitations of simulation parts: Fuel assembly simulation parts usually do not undergo any deformation or torsion during the actual measurement process, making it difficult to simulate the complex deformation state experienced by fuel assemblies in actual use. Therefore, the measurement conducted using simulation parts cannot fully reflect the deformation of actual fuel assemblies.

[0005] (2) Lack of dynamic deformation verification: Existing methods are unable to verify the deformation of fuel assemblies under dynamic conditions, especially for complex deformation states such as S-type deformation, C-type deformation, and superimposed torsional deformation. Existing simulation parts are difficult to effectively simulate, resulting in insufficient verification of detection sensitivity and accuracy.

[0006] (3) Difficulty in verifying detection technology: As simulation parts cannot simulate the various complex deformation states that occur in actual use, existing detection technologies cannot be verified through unified standards. The accuracy and sensitivity of different detection technologies vary, making it difficult to conduct comprehensive and unified verification, which affects the reliability of the detection results.

[0007] (4) Limitations of detection methods: Existing detection methods mostly use simple specimens or theoretical calculations, lack comprehensive testing under actual complex deformation conditions, and are unable to verify the sensitivity and effectiveness of existing and new detection technologies, thus affecting the accuracy and reliability of the test results. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a fuel assembly deformation simulation device.

[0009] The technical solution adopted by the present invention to solve the technical problem is: a fuel assembly deformation simulation device, comprising:

[0010] Support frame;

[0011] A plurality of grid simulation parts are sleeved on the support frame at intervals along the axial direction of the support frame;

[0012] A plurality of positioning members, each of which is respectively connected to the support frame and the grid simulation member and limits the axial movement of the grid simulation member along the support frame;

[0013] A plurality of position limiting members, inserted between the grid simulation member and the support frame to adjust the radial relative position of the grid simulation member and the support frame;

[0014] A plurality of simulation tubes are inserted into a plurality of the grid simulation parts.

[0015] In some embodiments, the support frame includes a plurality of long rods, and the plurality of long rods are parallel to each other.

[0016] In some embodiments, the support frame includes a main rod and a plurality of auxiliary rods, wherein the plurality of auxiliary rods are parallel to the main rod and are arranged around the periphery of the main rod;

[0017] The cross section of the main rod is larger than the cross section of the secondary rod.

[0018] In some embodiments, the cross section of the main rod and / or the auxiliary rod is a curved surface or a polygon.

[0019] In some embodiments, the positioning member is a fixed tray, which is arranged below the grid simulation member and is sleeved and fixed on the outside of the supporting frame.

[0020] In some embodiments, the fixed tray includes a bottom plate and a raised portion protruding above the bottom plate;

[0021] The grid simulation piece is placed on the bottom plate and sleeved on the outside of the raised portion.

[0022] In some embodiments, the protruding portion is provided with a plurality of limiting grooves for accommodating the limiting member, and the plurality of limiting grooves are arranged at intervals on the outer circumference of the protruding portion.

[0023] In some embodiments, the grid simulation member is provided with a central through hole and a plurality of slots for the simulation tubes to be inserted, and the plurality of slots are arranged around the outer periphery of the central through hole;

[0024] The radial dimension of the middle through hole is larger than the radial dimension of the supporting frame and has a radial movement margin.

[0025] In some embodiments, the fuel assembly deformation simulation device further includes a bottom frame and a top frame, and the support skeleton is inserted and fixed between the bottom frame and the top frame.

[0026] In some embodiments, the simulated tube is made of PVC material, and the grid simulation member is made of metal material.

[0027] By implementing the present invention, the following beneficial effects are achieved:

[0028] The fuel assembly deformation simulation device of the present invention comprises: a support skeleton; a plurality of grid simulation parts, which are sleeved on the support skeleton at intervals along the axial direction of the support skeleton; a plurality of positioning parts, each of which is respectively connected to the support skeleton and the grid simulation part and limits the axial movement of the grid simulation part along the support skeleton; a plurality of limiting parts, which are inserted between the grid simulation part and the support skeleton to adjust the radial relative position of the grid simulation part and the support skeleton; and a plurality of simulation tubes, which are inserted inside the plurality of grid simulation parts. The full-size support force is provided by the support skeleton, the grid simulation part simulates the actual grid, the positioning part locates the position of the grid simulation part, the limiting part adjusts the deformation and torsion of the grid simulation part, and the simulation tube simulates the actual fuel rod, thereby flexibly adjusting the bending and torsion deformation of the grid simulation parts of each layer of the fuel assembly, simulating the complex deformation state in actual use, and ensuring the reliability and accuracy of the subsequent detection results. The fuel assembly deformation simulation device provides the ability of dynamic deformation verification, unifies the verification standards of different detection technologies, and overcomes the limitations of existing detection means. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0030] Figure 1 1 is a schematic diagram of the overall structure of a fuel assembly deformation simulation device according to an embodiment of the present invention, wherein some simulation tubes are not shown;

[0031] Figure 2 yes Figure 1 Another direction view of the fuel assembly deformation simulation device, wherein part of the simulation tube is not shown;

[0032] Figure 3 yes Figure 1 An enlarged structural schematic diagram of a position of a fuel assembly deformation simulation device;

[0033] Figure 4 yes Figure 3 A schematic diagram of the installation of a position of a fuel assembly deformation simulation device, wherein some structures are not shown;

[0034] Figure 5 yes Figure 4 A bottom view of the installation diagram;

[0035] Figure 6 yes Figure 1 Schematic diagram of the structure of the positioning part. DETAILED DESCRIPTION

[0036] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0037] In the description of the invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a chemical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0039] See also Figures 1 to 6 An embodiment of the present invention discloses a fuel assembly deformation simulation device, which is used to simulate the deformation of a fuel assembly in actual application, so as to obtain the deformation data of the fuel assembly later. The fuel assembly deformation simulation device includes a support frame 1, a plurality of grid simulation members 2, a plurality of positioning members 3, a plurality of stop members 4 and a plurality of simulation tubes 5. The support frame 1 is used to ensure the strength of the full-size fuel assembly deformation simulation device.

[0040] A plurality of grid simulation members 2 are sleeved on the support frame 1 at intervals along the axial direction of the support frame 1, and the interval position of two adjacent grid simulation members 2 can be set proportionally according to the interval position of the grid of the actual fuel assembly. The number of grid simulation members 2 can be the same as the number of grids of the actual fuel assembly. Preferably, in this embodiment, the full size includes ten grid simulation members 2, and each grid simulation member 2 is made of metal material.

[0041] Each positioning member 3 is respectively connected to the support frame 1 and the grid simulation member 2 and limits the axial movement of the grid simulation member 2 along the support frame 1. Among them, the grid simulation member 2 can be limited to move only downward along the axial direction of the support frame 1, or the grid simulation member 2 can be limited to move upward and downward along the axial direction of the support frame 1 at the same time, and the positioning member 3 leaves the grid simulation member 2 free to move radially along the support frame 1.

[0042] A number of limiters 4 are inserted between the grid simulation part 2 and the support skeleton 1 to adjust the radial relative position of the grid simulation part 2 and the support skeleton 1. Limiters 4 of several thicknesses can be set in a stepped manner. According to the deformation of the actual fuel assembly, limiters 4 of corresponding thicknesses are embedded to adjust the radial relative position of each grid simulation part 2 and the support skeleton 1. For example, taking the support skeleton 1 as a reference point, a limiter 4 is embedded on the left side of the support skeleton 1. Since the position of the support skeleton 1 remains unchanged, the grid simulation part 2 can be offset to the left. A limiter 4 is embedded on the front side of the support skeleton 1. Since the position of the support skeleton 1 remains unchanged, the grid simulation part 2 can be offset forward. And so on.

[0043] A plurality of simulation tubes 5 are inserted into a plurality of grid simulation members 2. Each simulation tube 5 is fully inserted into all grid simulation members 2, and the simulation tube 5 is used to simulate the torsion and deformation of the fuel rod. For example, all simulation tubes 5 are arranged on the periphery of the grid simulation member 2, and an operating space for embedding the stopper 4 is reserved. The simulation tube 5 is made of PVC material, and the surface is painted with metallic color to ensure the consistency of color.

[0044] The fuel assembly deformation simulation device of the present invention realizes accurate simulation of the deformation and torsion of the full-size fuel assembly. Through the cooperation of the support skeleton 1, a plurality of grid simulation parts 2, a plurality of positioning parts 3, a plurality of stoppers 4 and a plurality of simulation tubes 5, the bending and torsion deformation of the grid simulation parts 2 of each layer of the fuel assembly deformation simulation device can be flexibly adjusted to simulate the complex deformation state in actual use. It realizes dynamic deformation verification, uniformly verifies the accuracy and effect of multiple detection technologies, overcomes the limitations of existing detection methods, realizes accurate measurement of the complex deformation state of the fuel assembly, and ensures the reliability and consistency of the detection results.

[0045] Provides the ability to verify dynamic deformation. During use, the fuel assembly will experience complex deformations such as S-shaped and C-shaped, and even superimposed torsional deformation. The fuel assembly deformation simulation device of the present invention can simulate these complex deformations through the combination of the limiter 4, providing conditions for dynamic verification of the detection technology.

[0046] The verification standards of different detection technologies are unified. The present invention provides a standardized deformation simulation platform, which can verify the accuracy and sensitivity of different detection technologies in a unified manner, ensuring the comparability and consistency of the detection results.

[0047] The limitations of existing detection methods are overcome. By adopting full-scale fuel assembly simulation and precise deformation control, the present invention can fully verify the effects of existing and new detection technologies under complex deformation states and improve the accuracy and reliability of detection results.

[0048] With the help of laser measurement technology, high-precision deformation calibration data can be obtained. The simulation device of the present invention is deformed in the air, and through high-precision laser measurement and image stitching, accurate three-dimensional data of the deformation simulation component can be obtained, providing a reliable calibration reference for underwater measurement solutions.

[0049] In some embodiments, Figure 1 and Figure 2 As shown, the fuel assembly deformation simulation device also includes a bottom frame 6 and a top frame 7, and the support frame 1 is inserted and fixed between the bottom frame 6 and the top frame 7. The bottom frame 6 is used to simulate the deformation of the lower tube seat of the fuel assembly, and the top frame 7 is used to simulate the deformation of the upper tube seat of the fuel assembly. At the same time, the top frame 7 is also used to provide a lifting point during lifting and testing.

[0050] It can be understood that the length of the simulated tube 5 is smaller than the length of the supporting frame 1 , a gap is left between the bottom end of the simulated tube 5 and the bottom frame 6 , and a gap is left between the top end of the simulated tube 5 and the top frame 7 .

[0051] In some embodiments, Figure 3 As shown, the support frame 1 includes a plurality of long rods, which are parallel to each other. The number of the long rods can be one, two or three, etc. The cross section of the long rod can be a curved surface, such as a circle, an ellipse, etc. The cross section of the long rod can also be a polygon, such as a triangle, a quadrilateral, a pentagon, etc., and the present invention is not limited here.

[0052] In addition to the above embodiments, in some embodiments, the support skeleton 1 may also include a main rod 11 and a plurality of secondary rods 12, wherein the plurality of secondary rods 12 are parallel to the main rod 11 and are arranged around the periphery of the main rod 11. The cross section of the main rod 11 is larger than the cross section of the secondary rod 12. The plurality of secondary rods 12 may be arranged in one or more circles outside the main rod 11, the intervals between adjacent secondary rods 12 are the same, and the cross section of the secondary rod 12 decreases in the direction away from the main rod 11, so as to simulate the decreasing support force and deformation difficulty of the fuel assembly from the center to the outside, that is, the increasing support force and deformation difficulty of the fuel assembly from the outside to the center. Preferably, in this embodiment, the number of main rods 11 is one, and the number of secondary rods 12 is four.

[0053] In some embodiments, the cross section of the main rod 11 and / or the auxiliary rod 12 is a curved surface or a polygon. The curved surface is, for example, a circle, an ellipse, etc., and the polygon is, for example, a triangle, a quadrilateral, a pentagon, etc. The cross-sectional shape of the main rod 11 and the cross-sectional shape of the auxiliary rod 12 may be the same or different. For example, the cross section of the main rod 11 is a circle, and the cross section of the auxiliary rod 12 is a circle; the cross section of the main rod 11 is an ellipse, and the cross section of the auxiliary rod 12 is a circle; the cross section of the main rod 11 is a quadrilateral, and the cross section of the auxiliary rod 12 is an ellipse; the cross section of the main rod 11 is a quadrilateral, and the cross section of the auxiliary rod 12 is a pentagon, etc.; and so on. Preferably, in the embodiment, the cross section of the main rod 11 and the cross section of the auxiliary rod 12 are the same, both of which are circular, so as to restore the stress conditions of the actual fuel assembly to the maximum extent and provide more accurate deformation data.

[0054] In some embodiments, Figures 4 to 6 As shown, the positioning member 3 is a fixed tray, which is arranged below the grid simulation member 2 and is sleeved and fixed on the outside of the support frame 1. The fixed tray can bear the gravity of the supporting grid simulation member 2 to limit the grid simulation member 2 from moving downward along the axial direction of the support frame 1. In some variations, the fixing member can be two support plates arranged opposite to each other in the radial direction, which are respectively fixedly connected to the support frame 1. It can be understood that in some other embodiments, the positioning member 3 can also include a limiting structure arranged above the grid simulation member 2, which can limit the grid simulation member 2 from moving upward along the axial direction of the support frame 1.

[0055] In some embodiments, the fixed tray includes a bottom plate 31 and a protrusion 32 protruding from the bottom plate 31. The grid simulation member 2 is placed on the bottom plate 31 and sleeved outside the protrusion 32. The bottom plate 31 can bear the gravity of the grid simulation member 2. The protrusion 32 can limit the support frame 1 to enhance the support force, and the radial thickness of the protrusion 32 can adjust the gap between the support frame 1 and the grid simulation member 2 to adjust the radial movement margin of the grid simulation member 2.

[0056] In some embodiments, the protrusion 32 is provided with a plurality of limiting grooves 33 for accommodating the limiting member 4, and the plurality of limiting grooves 33 are arranged at intervals on the outer periphery of the protrusion 32. The limiting grooves 33 are used to accommodate and position the limiting member 4, so as to facilitate the insertion of the limiting member 4. Preferably, any direction in the radial direction is assumed to be the x direction, and the y direction is perpendicular to the x direction, and the limiting grooves 33 are at least arranged on two opposite outer sides in the x direction and two opposite outer sides in the y direction of the protrusion 32, so as to meet the offset of the grid simulation member 2 along the x direction and the y direction. Preferably, the grid simulation member 2 is rectangular, and the x direction and the y direction are taken as the adjacent sides of the grid simulation member 2.

[0057] In some embodiments, the grid simulation part 2 is provided with a central through hole and a plurality of slots 21 for inserting the simulation tube 5, and the plurality of slots 21 are arranged around the outer periphery of the central through hole. The radial dimension of the central through hole is larger than the radial dimension of the support frame 1 and a radial movement margin is reserved. Preferably, the radial dimension of the central through hole is larger than the radial dimension of the protrusion 32 and a radial movement margin is reserved. The limiting member 4 is embedded between the grid simulation part 2 and the protrusion 32, placed in the central through hole and the limiting groove 33, and respectively abuts against the hole wall of the central through hole and the groove wall of the limiting groove 33 to achieve fixation. An elastic clamping structure is provided in the slot 21 to facilitate clamping the simulation tube 5.

[0058] Similarly, the bottom frame 6 and the top frame 7 are respectively provided with a central through hole, which has the same structure as the central through hole of the grid simulation member 2 and will not be described in detail here.

[0059] In some embodiments, the stopper 4 includes a first surface abutting against the grid simulation member 2 and a second surface abutting against the deformable member, and the first surface and the second surface are respectively planes. Preferably, the stopper 4 is a stopper block in the shape of a cube, a right prism, etc. The central through hole of the grid simulation member 2 is a square hole, the stopper groove 33 is a square groove, and the opposite surfaces of the two are parallel to each other. The stopper 4 is only used to adjust the offset degree of the grid simulation member 2 to prevent the grid simulation member 2 from deforming from the inside.

[0060] The method of using the fuel assembly deformation simulation device of the present invention is as follows:

[0061] The support frame 1 is fixedly installed on the bottom frame 6, and the positioning member 3 and the grid simulation member 2 are installed in sequence from the bottom to the top, and the process is repeated until all the grid simulation members 2 are installed. The top frame 7 is fixedly connected to the support frame 1, and then part of the simulation tube 5 is inserted into the card slot 21 from top to bottom, and an operating space is left for inserting the limiting member 4. According to the deformation data, the limiting member 4 is sequentially embedded between a single grid simulation member 2 and the positioning member 3. For example, there are four limiting members 4 with thicknesses of 2 units, 5 units, 6 units, and 9 units. The limiting member 4 with a thickness of 2 units is embedded in the limiting groove 33 on the left side of the x direction, and the limiting member 4 with a thickness of 9 units is embedded in the limiting groove 33 on the right side of the x direction, and the grid simulation member 2 is offset to the left by 7 units; the limiting member 4 with a thickness of 5 units is embedded in the limiting groove 33 on the front side of the y direction, and the limiting member 4 with a thickness of 6 units is embedded in the limiting groove 33 on the rear side of the y direction, and the grid simulation member 2 is offset to the front side by 1 unit. By analogy, the deformation of each grid simulation member 2 can be adjusted individually until the deformation of all grid simulation members 2 is adjusted to form the overall torsion of the entire fuel assembly deformation simulation device. If necessary, the deformation data is referred to to perform deformation simulation on the bottom frame 6 and the top frame 7. The deformation data is the deformation of the fuel assembly to be simulated.

[0062] In some embodiments, after the overall deformation of the entire fuel assembly deformation simulation device is completed, the crane lifts the fuel assembly deformation simulation device off the ground, and the deformed assembly is calibrated by a laser measurement method to obtain the overall deformation and torsion of the fuel assembly deformation simulation device under the current combination of the limiter 4. Due to the high accuracy of laser measurement in the air, the images can be spliced ​​and processed to obtain the deformed structure, which can provide calibration data for subsequent underwater measurement schemes.

[0063] By implementing the present invention, the following beneficial effects are achieved:

[0064] The fuel assembly deformation simulation device of the present invention provides full-size support force through the support skeleton 1, the grid simulation part 2 simulates the actual grid, the positioning part 3 positions the position of the grid simulation part 2, the limiter 4 adjusts the deformation and torsion of the grid simulation part 2, and the simulation tube 5 simulates the actual fuel rod, thereby flexibly adjusting the bending and torsion deformation of the grid simulation parts 2 of each layer of the fuel assembly, simulating the complex deformation state in actual use, and ensuring the reliability and accuracy of subsequent detection results. The fuel assembly deformation simulation device provides the ability of dynamic deformation verification, unifies the verification standards of different detection technologies, and overcomes the limitations of existing detection methods.

[0065] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention, that is, the embodiments described in "some embodiments" can be freely combined with any of the above and below embodiments. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A fuel assembly deformation simulation device, characterized in that: include: Support frame (1); A plurality of grid simulation parts (2) are sleeved on the support frame (1) at intervals along the axial direction of the support frame (1); A plurality of positioning members (3), each of the positioning members (3) being respectively connected to the supporting frame (1) and the grid simulation member (2) and limiting the axial movement of the grid simulation member (2) along the supporting frame (1); A plurality of position limiting members (4) inserted between the grid simulation member (2) and the support frame (1) to adjust the radial relative position of the grid simulation member (2) and the support frame (1); A plurality of simulation tubes (5) are inserted into a plurality of the grid simulation parts (2).

2. The fuel assembly deformation simulation device according to claim 1, characterized in that: The supporting frame (1) comprises a plurality of long rods, and the long rods are parallel to each other.

3. The fuel assembly deformation simulation device according to claim 1, characterized in that: The support frame (1) comprises a main rod (11) and a plurality of auxiliary rods (12), wherein the plurality of auxiliary rods (12) are parallel to the main rod (11) and are arranged around the outer periphery of the main rod (11); The cross section of the main rod (11) is larger than the cross section of the secondary rod (12).

4. The fuel assembly deformation simulation device according to claim 3, characterized in that: The cross section of the main rod (11) and / or the auxiliary rod (12) is a curved surface or a polygon.

5. The fuel assembly deformation simulation device according to claim 1, characterized in that: The positioning member (3) is a fixed tray, which is arranged below the grid simulation member (2) and is sleeved and fixed on the outside of the supporting frame (1).

6. The fuel assembly deformation simulation device according to claim 5, characterized in that: The fixed tray comprises a bottom plate (31) and a raised portion (32) protruding above the bottom plate (31); The grid simulation component (2) is placed on the bottom plate (31) and sleeved on the outside of the raised portion (32).

7. The fuel assembly deformation simulation device according to claim 6, characterized in that: The raised portion (32) is provided with a plurality of limiting grooves (33) for accommodating the limiting member (4), and the plurality of limiting grooves (33) are arranged at intervals on the outer periphery of the raised portion (32).

8. The fuel assembly deformation simulation device according to claim 1, characterized in that: The grid simulation component (2) is provided with a central through hole and a plurality of slots (21) for the simulation tube (5) to be inserted, and the plurality of slots (21) are arranged around the outer periphery of the central through hole; The radial dimension of the middle through hole is larger than the radial dimension of the support frame (1) and has a radial movement margin.

9. The fuel assembly deformation simulation device according to any one of claims 1 to 8, characterized in that: The fuel assembly deformation simulation device also includes a bottom frame (6) and a top frame (7), and the support frame (1) is inserted and fixed between the bottom frame (6) and the top frame (7).

10. The fuel assembly deformation simulation device according to any one of claims 1 to 8, characterized in that: The simulated tube (5) is made of PVC material, and the grid simulated member (2) is made of metal material.

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