Loading device for spent fuel cell absorber sample plate

Abstract

The utility model relates to a spent fuel cell absorber sample plate loading device which comprises a sample tree and a transfer tool, the sample tree is provided with a sample main body, and an upper tube seat and a lower tube seat which are respectively and fixedly connected to the upper end and the lower end of the sample main body, and the sample main body is a polyhedral column with a hollow structure; a plurality of sample shelves for assembling / installing sample plates are arranged on at least one surface of the sample main body, the plurality of sample shelves on the same surface are vertically distributed at intervals, the sample plates for monitoring the spent fuel pool are inserted and fixed on the sample shelves, and the sample trees can be hexagonal or quadrilateral sample trees. The transfer tool is mainly composed of a top cover, a base and a plurality of stand columns, the stand columns are supported between the top cover and the base, the center of the top cover is provided with a central through hole for a sample tree to penetrate through, and the center of the base is provided with a positioning structure for the sample tree. The loading device can meet the loading requirement of the spent fuel cell absorber sample plate, and is simple and convenient to operate and good in safety.

Description

Technical Field

[0001] The utility model relates to a spent pool absorber sample plate loading device. Background Art

[0002] Boron steel test plates, boron aluminum plate test plates and boron aluminum coated test plates are used to be set up in spent pools for spent fuel pool (spent fuel pool) monitoring. However, there is currently no suitable test plate loading tooling that can meet the relevant requirements for spent fuel storage grid absorber performance monitoring. The use of conventional mechanical equipment to load test plates is not only complicated to operate, but also poses certain safety hazards. Utility Model Content

[0003] The utility model aims to provide a spent pool absorber sample plate loading device to meet the spent pool absorber sample plate loading needs, facilitate operation and improve safety.

[0004] The technical solution of the present utility model is: a spent pool absorber sample plate loading device includes a sample tree, the sample tree is provided with a sample body (or sample tree body, referred to as the body) and an upper tube seat and a lower tube seat respectively fixedly connected to the upper and lower ends of the sample body, the sample body is a polyhedral column with a hollow structure (a cylinder with the same appearance as the polyhedral column, the so-called polyhedral column is a straight column), and at least one surface of the sample body (the side surface of the column) is provided with a plurality of sample shelves for assembling / installing sample plates, and the multiple sample shelves on the same surface are vertically spaced.

[0005] Furthermore, the sample tree is a hexagonal sample tree or a quadrilateral sample tree, the sample body of the hexagonal sample tree is a six-sided column, and its cross-section is a parallelepiped, including two long sides and four short sides, the two long sides are opposite and parallel to each other, the length of each long side is equal, and the length of each short side is equal; the sample body of the quadrilateral sample tree is a four-sided column, and its cross-section is a square.

[0006] Preferably, the sample shelves of the hexagonal sample tree are respectively arranged on the two wide sides of the sample body, and the four narrow sides are usually not provided with sample shelves.

[0007] Preferably, the number and distribution of the sample shelves on the two wide sides of the sample body are the same.

[0008] Preferably, the sample shelves of the quadrilateral sample tree are respectively arranged on four sides of the sample body, or respectively arranged on two opposite sides of the sample body.

[0009] Preferably, when the sample racks of the quadrilateral sample tree are respectively arranged on the four sides of the sample body, the number and distribution of the sample racks on each side are the same, or the number and distribution of the sample racks on the same group of opposite sides are the same, and the number and / or distribution of the sample racks on different groups of opposite sides are different.

[0010] Preferably, when the sample shelves of the quadrilateral sample tree are respectively arranged on two opposite surfaces of the sample body, the number and distribution of the sample shelves on the two opposite surfaces where the sample shelves are arranged are the same or different.

[0011] Preferably, the main part of the sample rack is a sample holder, which is U-shaped and includes two vertical sides and a horizontal bottom side. The two ends of the horizontal bottom side are respectively connected to the bottom ends of the two vertical sides. A through groove is provided on the inner side surface of each side of the U-shape (two vertical sides and one horizontal bottom side), and the two ends of the through groove on the horizontal bottom side are respectively connected to the bottom ends of the through groove on each vertical side. The width of the through groove is adapted to the thickness of the sample plate, that is, the width of the through groove is slightly larger than the thickness of the sample plate (equal to the thickness of the sample plate plus the necessary operating gap) to allow the sample plate to be inserted and removed, and to minimize the gap between the two after insertion. The so-called necessary operating gap is set according to actual needs.

[0012] Preferably, the sample holder is provided with a top screw and a top screw anti-drop sleeve matched with the top screw.

[0013] Preferably, the top screw anti-dropout sleeve is tubular (for example, a round tube or a square tube), the inner end of the top screw anti-dropout sleeve fits the outer side surface of the card seat and is fixedly connected to the outer side surface of the card seat, the outer end of the top screw anti-dropout sleeve is provided with an outer end plate with a closed outer port, and a top screw operation hole is provided in the center of the outer end plate, and a top screw through hole is provided on the outer side surface of the card seat, which is coaxial with the top screw anti-dropout sleeve (the axes of the two are located on the same straight line perpendicular to the outer side surface of the card seat), and an internal thread suitable for connecting with the top screw thread is provided in the top screw through hole, and the top screw thread matching the top screw anti-dropout sleeve is connected to the corresponding top screw through hole, and its head is located in the corresponding top screw anti-dropout sleeve, and the diameter of the head is larger than the aperture of the top screw operation hole, thereby limiting the top screw from falling out of the top screw anti-dropout sleeve.

[0014] Typically, the number of top screw anti-dropout sleeves provided on the same sample holder may be two, which are respectively provided at the middle and upper parts of the two vertical sides of the sample holder.

[0015] Furthermore, a transfer tool is also provided.

[0016] Preferably, the transport tool is mainly composed of a top cover, a base and several (for example, three or four) columns, and the columns are evenly spaced or symmetrically distributed (non-evenly spaced and symmetrically distributed) on the same circumference (cylinder) around the axis of the transport tool (vertical axis), and are supported between the top cover and the base. The upper and lower ends of the columns are fixedly connected to the top cover and the base respectively. A central through hole for passing the sample tree is provided in the center of the top cover. The central through hole is conformal to the sample body, allowing the sample tree to pass through smoothly and limiting the shaking of the sample tree (upper end of the sample body) passed therethrough. A positioning structure for the sample tree (lower tube seat of the sample tree) is provided in the center of the base (the center of the upper surface of the base). The positioning structure is conformal to the lower tube seat of the sample tree, allowing the lower tube seat of the sample tree to be smoothly inserted (snuckled in) and limiting the shaking of the sample tree (lower tube seat) inserted therein.

[0017] Preferably, the top cover is provided with a lifting structure for matching with a hook or other lifting equipment.

[0018] The beneficial effects of the present invention are as follows: since the sample tree adopts a multi-prism main body, a sample shelf for loading and fixing the sample plate is provided on the side of the main body, and the sample shelves located on the same side are regularly distributed up and down according to design requirements, the sample plates are plugged and fixed to the corresponding sample shelves, and the sample tree is placed at a suitable position in the exhaust tank, thus realizing a regular arrangement of the sample plates in the exhaust tank; since the sample shelves are provided with slots and equipped with adjusting screws, the sample plates are inserted into the slots of the sample shelves and the adjusting screws are tightened, thus realizing the installation and fixation of the sample plates on the sample tree, and the sample plates can be pulled out by loosening the screws. , implement the sample plate disassembly; since the sample shelf is equipped with a top screw anti-drop sleeve, the adjustment top screw is set in the top screw anti-drop sleeve, and the top screw will not fall out of the top screw anti-drop sleeve, further facilitating the fixation and disassembly of the sample plate; since the sample tree is provided with an upper tube seat and a lower tube seat, the upper tube seat can be grasped by a manipulator to implement the movement and assembly of the sample tree, and the sample tree can be stably set in the spent tank through the lower tube seat; since the main body of the sample tree adopts a hollow structure (cylindrical structure), the weight and material consumption of the sample tree are effectively reduced; since a number of through holes (overflow ports) are provided on the main body of the hollow structure sample tree , the upper and lower tube seats of the sample tree can also be provided with through holes according to actual needs to allow liquid to flow in and out, which is convenient for installation in the wet spent pool; since the top cover and base of the transport tool are respectively provided with central through holes and positioning structures for loading and fixing the sample tree, it is convenient to load and disassemble the sample tree on the transport tool, and thus facilitate the transport of the sample tree and operations outside the pool; since the sample tree is located on the central axis of the transport tool, and the columns surround the sample tree, stable support and uniform gravity distribution of the transport tool are achieved, which is conducive to the transport operation of the transport tool and the sample tree and their stable placement outside the pool; A lifting structure is provided on the top cover of the transport tool, which facilitates the overall lifting and transport of the transport tool and the sample tree; since through holes are provided on the bottom plate of the top cover of the transport tool, liquid is allowed to flow in and out, which facilitates operations in the spent pool; since a protective sleeve can be provided on the outside of the sample tree, and a vertical long strip window corresponding to the sample rack / sample plate is opened on the side wall of the protective sleeve, after the sample tree is loaded onto the transport tool, the sample rack and sample plate on the sample tree are exposed from the vertical long strip window, thereby allowing the sample plate to be disassembled and loaded on the transport tool, greatly facilitating related operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the construction of a hexagonal specimen tree;

[0020] Figure 2 This is a schematic diagram of the specimen body (top view) structure of the hexagonal specimen tree;

[0021] Figure 3 It is a schematic diagram of the construction of a quadrilateral specimen tree;

[0022] Figure 4 This is a schematic diagram of the structure of the specimen body (top view) of the quadrilateral specimen tree;

[0023] Figure 5 Schematic diagram of the structure of the sample rack;

[0024] Figure 6 It is a schematic diagram of the (section) structure of the top screw anti-dropout sleeve;

[0025] Figure 7 This is a schematic diagram of the structure of the transport tool. DETAILED DESCRIPTION

[0026] See also Figure 1-Figure 7 The sample tree is primarily composed of a sample tree body (referred to as the body) 12, an upper tube seat 11, and a lower tube seat 13. The upper tube seat and the lower tube seat are respectively located at the upper and lower ends of the body and are fixedly connected to the body as a whole. The sample tree body is a multi-faceted column (cylinder) with a hollow structure. Typically, a number of sample racks 20 are vertically evenly spaced on two (or a group of) opposing surfaces (or opposite sides) of the multi-faceted column for loading sample plates 30. If necessary, sample racks can also be installed on multiple groups of opposing surfaces. Typically, the sample racks on the same group of opposing surfaces are arranged in the same manner. The sample racks on different groups of opposing surfaces can be arranged in the same or different manner to accommodate different sample plate distribution requirements. The upper tube seat is suitable for grasping by a robot. Its main part is tubular and is connected to the top of the sample tree body through a conical cylindrical connector or other connection methods. The structure matching the robot can be set according to actual needs; the lower tube seat is used to be placed in an appropriate position of the spent pool / spent fuel storage grid and support the entire sample tree. Its main part can also be tubular, or other suitable structures can be adopted. It can be connected to the top of the sample tree body through a conical cylindrical connector or other connection methods. The corresponding matching structure / shape can be set according to the actual situation of the spent pool / spent fuel storage grid so that it can be stably placed / installed in an appropriate position of the spent pool / spent fuel storage grid.

[0027] According to the shape of the specimen body, the specimen tree can be set as a specimen tree with a hexagonal structure (hexagonal specimen tree for short), or as a specimen tree with a quadrilateral structure (quadrilateral specimen tree for short).

[0028] The main body of the hexagonal specimen tree is in the shape of a right six-sided prism (hexagonal prism) with a parallelepiped cross-section. Two opposing sides are long sides 15 (equal in length), and the remaining four sides are short sides 16 (equal in length). The faces (lateral faces of the prism) on which the long sides lie are referred to as wide faces, while the faces on which the short sides lie are referred to as narrow faces. The specimen tree shelves are located on the two wide faces, with the number and distribution (height and spacing) of shelves on each wide face being identical. These shelves are used to hold specimen plates. If necessary, a regular hexagonal prism can be used, with specimen shelves installed on one or more sets of opposing faces to facilitate flexible placement of specimen plates according to actual needs.

[0029] The main body of the quadrilateral specimen tree is in the shape of a right four-sided prism (quadrangular prism) with a rectangular, preferably square, cross-section, and sides of equal length. Shelves for loading specimen plates can be provided on all four sides of the specimen tree, or only on two opposing sides. The number and distribution of shelves on each side are the same; if necessary, the number and / or distribution of shelves on the two opposing sides can be different. During use, specimen plates can be placed on the shelves on all sides or only on the two opposing sides, depending on actual monitoring needs.

[0030] The position of the sample plate in the sample tree should be able to enable the sample plate to receive representative irradiation to ensure the monitoring effect. Sample shelves can be arranged on the sample tree according to the monitoring needs.

[0031] To ensure that the specimen tree has excellent corrosion resistance, radiation resistance and structural stability, and will not deform or crack during its entire life cycle, will not react adversely with the medium and various structural components in the spent water pool, and will not release substances that have an adverse effect on water quality, all parts can be made of 304L austenitic stainless steel (022Cr19Ni10).

[0032] Example 1. A hexagonal specimen tree consists primarily of an upper tube base, a main body, 16 sets of specimen racks, and a lower tube base. Depending on actual needs, specimen plate protection panels 28 can be installed on both sides of the racks. These panels can be long and narrow, ensuring that all racks on the same side are protected.

[0033] The main cross-section of the specimen tree is a hexagonal tube with a wall thickness of 6 mm. The total height of the specimen tree is 4570 mm.

[0034] Eight (or groups) of 110×210 mm sample shelves are evenly / equally spaced on each wide side of the sample tree body, and a total of 16 groups of shelves are set on the two long sides (wide sides).

[0035] The two opposite sides (opposite sides) of the sample tree body can be used to hang 8 (or groups), a total of 16 boron steel sample plates for supervision. In order to obtain supervision data for a certain period of time, the supervision samples can be easily disassembled for neutron absorption performance testing.

[0036] Since the liquid needs to be taken out from the spent pool, the upper and lower tube bases of the hexagonal sample tree are hollow in design. The main body of the hexagon is a hexagonal tube structure. Overflow holes (through holes) 51 are provided on the two long side walls (wide surfaces) to facilitate the leakage of liquid in the spent pool and minimize liquid accumulation.

[0037] Example 2. The quadrilateral specimen tree consists primarily of an upper tube base, a quadrilateral main body, 32 sets of specimen racks (8 per side), and a lower tube base. Depending on actual needs, specimen plate protection panels can be installed on both sides of the racks. These panels can be long and narrow, ensuring that all racks on the same side are within their protection range.

[0038] The main cross section of the quadrilateral specimen tree is a square tube with a wall thickness of 6 mm. The total height of the specimen tree is 4060 mm.

[0039] Eight sample plates for monitoring are placed on the two opposite sides (opposite sides) of the main body of the quadrilateral sample tree, for a total of 16. One side has a 120×180mm boron-aluminum plate sample plate, and the other side has a 120×180mm boron-aluminum coated sample plate. In order to obtain monitoring data for a certain period of time, the monitoring sample plates can be easily disassembled for neutron absorption performance testing.

[0040] Since the liquid needs to be taken out from the spent pool, the upper and lower tube seats of the quadrilateral sample tree are hollow in design. The quadrilateral body is a square tube structure with overflow holes (through holes) on the four walls to facilitate the leakage of liquid in the spent pool and minimize liquid accumulation.

[0041] Example 3. A transport tool for hexagonal specimen trees. This tool is used to transport and lift hexagonal specimen trees. One (or a set of) hexagonal specimen trees can be placed in the transport tool.

[0042] The transport tool for the hexagonal specimen tree consists of a top cover 41, three (or four) columns 42 and a base 43. The hexagonal specimen tree can be entered or taken out from top to bottom through the central through hole of the top cover. The central through hole on the top cover is a hexagonal hole, which is conformal to the main body of the specimen tree, allowing the specimen tree to be inserted through the center. After being inserted into place, the top of the main body of the specimen tree passes through the central through hole of the top cover of the transport tool, and the top of the main body is fixed by the constraint of the central through hole. The central through hole of the top cover is slightly larger than the outer shape of the main body, so that there is a small (moderate) operating gap between the two (the gap required for implementing the specimen tree insertion or extraction operation). The two sides of the top cover are used for the structure of the hook / other lifting equipment, for example, a short tube 45 for lifting with a built-in cross bar matching the hook. A positioning structure 46 for the lower tube seat is provided in the middle of the base's surface (upper surface). For example, three sets (six) of centering and positioning plates can be provided, distributed 120 degrees apart and positioned on each of the six sides of a hexagon. Alternatively, a positioning tube with a similar conformal / cross-sectional shape to the lower tube seat can be provided in the middle of the base's surface (upper surface). Because the space enclosed by the centering and positioning plates and the space within the positioning tube conform to the lower tube seat of the hexagonal specimen tree (a slight operating gap is left between them), the lower tube seat of the specimen tree can be inserted. When the specimen tree is loaded into position on the transport tool, the lower tube seat of the specimen tree is inserted into the space between the three sets of centering and positioning plates or into the positioning tube, with its bottom pressed against the base surface. The lower tube seat is secured by the constraints of the three sets of centering and positioning plates or the positioning tube. The upper ends of the centering and positioning plates can be tilted outward to increase the area enclosed within them, and the top of the positioning tube can be flared to increase the tube diameter at the top opening, facilitating the insertion of the lower tube seat.

[0043] The columns can be made of pipes, and the connection parts at the upper and lower ends can be provided with reinforcing ribs.

[0044] A protective sleeve can be set between the top cover and the base of the transport tool. The shape of the protective sleeve is similar or similar to that of the sample tree (upper tube seat and lower tube seat), and the tube cavity is slightly larger than the sample tree, allowing the sample tree to pass through it. When the sample tree is transferred into place, the corresponding part of the sample tree is accommodated in the protective sleeve, and a vertical long groove (vertical long strip window) is opened on the relevant side of the protective sleeve, so that the sample plate on the sample tree is exposed from the long groove.

[0045] Since the liquid needs to be taken out from the spent tank, there are several overflow holes on the top cover and base of the transfer tool. The column is also made of round steel pipe, and the lower end opening is connected to the space under the base to facilitate the seepage of liquid in the spent tank and minimize liquid accumulation.

[0046] Example 4. A transport tool for a quadrilateral specimen tree. This tool is used to transport and lift a quadrilateral specimen tree. One quadrilateral specimen tree can be placed in the transport tool.

[0047] The main difference between this embodiment and embodiment 3 is that the central through-hole on the top cover and the positioning structure on the base are designed to conform to the top of the main body and lower tube seat of the quadrilateral specimen tree, respectively. For example, the central through-hole on the top cover is a four-sided hole to accommodate the passage of the quadrilateral specimen plate body, and the positioning structure on the base is configured based on the shape of the lower tube seat. When the main body of the lower tube seat of the quadrilateral specimen tree and the hexagonal specimen tree are both circular tubes, the positioning structure on the base of the quadrilateral specimen tree transport tool can use three sets of centering positioning plates or circular tubular positioning cylinders, similar to the positioning structure on the base of the hexagonal specimen tree transport tool. When the main body of the lower tube seat of the quadrilateral specimen tree is a square tube, the centering positioning plates used as this positioning structure can be two sets (four), distributed at 90° angles on the lower portion of the base, distributed on the four sides of the quadrilateral, or can be quadrilateral (square tube) positioning cylinders. When the specimen tree is loaded into place on the transport tool, the upper tube seat of the specimen tree passes through the central through hole of the top cover of the transport tool, and is fixed by the constraint of the central through hole. The lower tube seat of the specimen tree is inserted into the space between the 6 (or 4) centering positioning plates or inserted into the circular (or quadrilateral) positioning cylinder, with the bottom pressed on the surface of the base, and the lower tube seat is fixed by the constraint of the 4 centering positioning plates or positioning cylinders.

[0048] When the horizontal cross-section of the lower tube seat is larger than the horizontal cross-section of the sample body, the central through hole on the top cover should be reasonably set to allow the lower tube seat / sample tree to be smoothly inserted and removed. In this case, any suitable existing technology can be used to fix the sample tree to the top cover. For example, a clamping / fixing mechanism such as a clamp for fixing the sample tree is provided on the top cover, and the operation of the clamping / fixing mechanism such as the clamp can be implemented by a manipulator.

[0049] Example 5. The material of the sample shelf can be 304L stainless steel (022Cr19Ni10). The main body of the sample shelf is a sample holder (sample plug-in seat, referred to as the holder) 21 that matches the sample plate. Two top screw anti-drop sleeves (or top screw holders) 22 and two adjustment top screws 23 are fixedly provided (for example, welded) on the sample holder.

[0050] The sample holder is U-shaped, with two vertical sides 25 and a horizontal bottom side 26. Each vertical side and horizontal bottom side adopts a groove structure, with the groove facing inward (inside of the U shape). The size of the holder and its groove structure should be adapted to the insertion and fixation requirements of the sample plate to allow the sample plate to be inserted into the holder through these groove structures. When inserted into place, the two vertical edges of the sample plate are inserted into the groove structures of the two vertical sides of the holder, and the bottom edge of the sample plate is inserted into the groove structure of the horizontal bottom side of the holder.

[0051] The two top screw anti-dropout sleeves are respectively located in the middle and upper parts of the two vertical sides of the U-shape, and each adjustment top screw is respectively arranged in its own top screw anti-dropout sleeve. The sample holder is provided with a top screw through hole corresponding to the adjustment top screw / top screw anti-dropout sleeve, and the top screw through hole on the holder is provided with an internal thread that cooperates with the top screw (threaded connection). The head of the top screw is located in the top screw anti-dropout sleeve, and its axial (axial) dimension of the top screw is smaller than the axial dimension of the inner cavity of the top screw anti-dropout sleeve, allowing the top screw to rotate inward and outward on the holder. A top screw operating hole 27 is provided in the middle of the outer end surface of the top screw anti-dropout sleeve for passing a tool for operating the top screw to rotate the top screw. The aperture of the top screw operating hole is smaller than the outer diameter of the top screw head, so that the top screw cannot fall out of the top screw operating hole. By reasonably coordinating the relevant dimensions, the sample plate inserted on the holder can be tightened and fixed by adjusting the top screw within the allowable stroke range, and the sample plate can also be loosened so that the sample plate can be smoothly inserted or removed from the holder, and the threaded connection with the top screw through hole is always maintained within the allowable stroke range and will not fall off from the top screw through hole.

[0052] Because the sample plates are contaminated after being placed in the spent pool, they cannot be handled directly or at close range. To place the sample plates on the sample tree, a robotic arm grasps the upper tube holder of the sample tree and inserts or removes them from the spent pool, approximately 6 meters deep. After removal, the sample plates can only be removed from the sample plate rack in the sample tree under proper operator protection. Each time, a sample plate is removed from the same horizontal position for monitoring testing, starting from the top and ending at the bottom. After the sample plates are removed, the sample tree is then placed back into the spent pool by the robotic arm. The transport tool can load / transport one sample tree at a time.

[0053] Unless otherwise specified or when one preferred or optional technical means is a further limitation of another technical means, the preferred and optional technical means disclosed in the present utility model can be arbitrarily combined to form several different specific implementation methods.

Claims

1. The device for loading sample plates of spent tank absorbers is characterized by The sample tree comprises a sample body and an upper tube seat and a lower tube seat respectively fixedly connected to the upper and lower ends of the sample body. The sample body is a multi-faceted column with a hollow structure. At least one surface of the sample body is provided with a plurality of sample shelves for assembling / installing sample plates. The multiple sample shelves on the same surface are vertically spaced.

2. The spent pool absorber sample plate loading device according to claim 1, characterized in that The sample tree is a hexagonal sample tree or a quadrilateral sample tree. The sample body of the hexagonal sample tree is a six-sided column, and its cross-section is a parallelepiped, including two long sides and four short sides. The two long sides are opposite and parallel to each other, and the lengths of the long sides are equal, and the lengths of the short sides are equal; the sample body of the quadrilateral sample tree is a four-sided column, and its cross-section is a square.

3. The spent pool absorber sample plate loading device according to claim 2, characterized in that The sample shelves of the hexagonal sample tree are respectively arranged on the two wide sides of the sample body.

4. The spent pool absorber sample plate loading device according to claim 3, characterized in that The number and distribution of the sample shelves on the two wide sides of the sample body are the same.

5. The spent pool absorber sample plate loading device according to claim 2, characterized in that The sample shelves of the quadrilateral sample tree are respectively arranged on four sides of the sample body, or respectively arranged on two opposite sides of the sample body.

6. The spent pool absorber sample plate loading device according to claim 5, characterized in that When the sample racks of the quadrilateral sample tree are respectively arranged on the four sides of the sample body, the number and distribution pattern of the sample racks on each side are the same, or the number and distribution pattern of the sample racks on the same group of opposite sides are the same, and the number and / or distribution pattern of the sample racks on different groups of opposite sides are different; when the sample racks of the quadrilateral sample tree are respectively arranged on two opposite sides of the sample body, the number and distribution pattern of the sample racks on the two opposite sides with the sample racks are the same or different.

7. The spent pool absorber sample plate loading device according to claim 1, characterized in that The main part of the sample rack is the sample holder, which is U-shaped and includes two vertical sides and a horizontal bottom side. The two ends of the horizontal bottom side are respectively connected to the bottom ends of the two vertical sides. A through groove is provided on the inner side of each side of the U-shape. The two ends of the through groove on the horizontal bottom side are respectively connected to the bottom ends of the through groove on each vertical side. The width of the through groove is adapted to the thickness of the sample plate.

8. The spent pool absorber sample plate loading device according to claim 7, characterized in that The sample holder is provided with a top screw and a top screw anti-dropout sleeve matching the top screw. The top screw anti-dropout sleeve is tubular, and the inner end of the top screw anti-dropout sleeve fits the outer side surface of the holder and is fixedly connected to the outer side surface of the holder. The outer end of the top screw anti-dropout sleeve is provided with an outer end plate with a closed outer port, and a top screw operation hole is provided in the center of the outer end plate. A top screw through hole coaxial with the top screw anti-dropout sleeve is provided on the outer side surface of the holder, and an internal thread suitable for being connected to the top screw thread is provided in the top screw through hole. The top screw thread matching the top screw anti-dropout sleeve is connected to the corresponding top screw through hole, and its head is located in the corresponding top screw anti-dropout sleeve, and the diameter of the head is larger than the aperture of the top screw operation hole.

9. The spent tank absorber sample plate loading device according to claim 8, characterized in that The number of top screw anti-drop sleeves provided on the same sample holder is two, which are respectively provided at the middle and upper parts of the two vertical sides of the sample holder.

10. The spent tank absorber sample plate loading device according to any one of claims 1 to 9, characterized in that A transfer tool is also provided, which is mainly composed of a top cover, a base and several columns. The columns are evenly spaced or symmetrically distributed on the same circumference around the axis of the transfer tool and are supported between the top cover and the base. The upper and lower ends of the columns are fixedly connected to the top cover and the base respectively. A central through hole for passing the sample tree is provided in the center of the top cover, and the central through hole is shaped like the sample body. A positioning structure for the sample tree is provided in the center of the base, and the positioning structure is shaped like the lower tube seat of the sample tree. The top cover is provided with a lifting structure for matching with a hook or other lifting equipment.

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