A hanging basket for nuclear fuel assembly container

Abstract

The present invention discloses a hanging basket for a nuclear fuel assembly container, comprising a top plate assembly, a bottom plate assembly, a connecting rod, a support plate and a storage sleeve; the connecting rod connects the top plate assembly and the bottom plate assembly which are arranged in parallel; the support plate is parallel to the top plate assembly and is arranged between the top plate assembly and the bottom plate assembly; a first sleeve mounting hole is arranged on the support plate; the storage sleeve is installed between the top plate assembly and the bottom plate assembly and is sleeved in the first sleeve mounting hole. The beneficial effects of the present invention are as follows: the hanging basket of the present invention is used in conjunction with a transport container, is placed in the inner cavity of the transport container, supports the fuel assembly during operation and transportation, improves the impact resistance, and ensures transportation safety.

Description

Technical Field

[0001] The invention relates to the field of dangerous goods transportation, in particular to a hanging basket for a nuclear fuel assembly container. Background Art

[0002] The safety of nuclear fuel assemblies needs to be ensured during transportation and / or storage. Therefore, in the design of the transport container, it is necessary to consider the selection of a suitable hanging basket structure to ensure the safety of the nuclear fuel inside the container.

[0003] Due to the high radiation pollution characteristics of nuclear fuel, the basket structure needs to be stable to prevent the nuclear fuel assembly container from shaking and impacting during transportation, and at the same time, it needs to have good heat dissipation to ensure that the nuclear fuel assembly will not react due to heat accumulation. In the prior art, there is a lack of a basket structure specifically suitable for the transportation and storage of nuclear fuel assemblies. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a hanging basket for a nuclear fuel assembly container. The technical solution can at least ensure good stability and impact resistance and is suitable for the transportation of nuclear fuel assembly containers.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution of the present invention is as follows:

[0006] A hanging basket for a nuclear fuel assembly container comprises a top plate assembly, a bottom plate assembly, a connecting rod, a support plate and a storage sleeve; the connecting rod connects the top plate assembly and the bottom plate assembly which are arranged in parallel; the support plate is parallel to the top plate assembly and is arranged between the top plate assembly and the bottom plate assembly; a first sleeve mounting hole is arranged on the support plate; the storage sleeve is installed between the top plate assembly and the bottom plate assembly and is sleeved in the first sleeve mounting hole.

[0007] Furthermore, the above-mentioned hanging basket for nuclear fuel assembly container also includes a heat transfer plate; the heat transfer plate is parallel to the support plate and is arranged between the top plate assembly and the bottom assembly; the heat transfer plate is provided with a positioning hole and a second sleeve mounting hole for constraining the storage sleeve; the connecting rod passes through the positioning hole.

[0008] Furthermore, in the above-mentioned hanging basket for the nuclear fuel assembly container, the heat transfer plate is relatively fixed to the connecting rod through the positioning hole, the flat washer and the third positioning block; the third positioning block is sleeved on the connecting rod and is provided with a locking opening on the outer surface; flat washers are provided on the upper and lower sides of the positioning hole of the heat transfer plate, and the flat washers are locked into the locking opening to relatively fix the heat transfer plate and the connecting rod.

[0009] Furthermore, in the above-mentioned hanging basket for nuclear fuel assembly container, there are at least two support plates; the support plates and / or the support plates and the bottom plate assembly are supported by second positioning blocks; the second positioning block is sleeved on the connecting rod, the upper end of which abuts the support plate, and the lower end of which abuts the support plate or the bottom plate assembly; the support plate and the top plate assembly are supported by a first positioning block, the first positioning block is sleeved on the connecting rod, the upper end of which abuts the top plate assembly, and the lower end of which abuts the support plate.

[0010] Furthermore, in the above-mentioned hanging basket for a nuclear fuel assembly container, a gap extending from the positioning hole to the edge of the heat transfer plate is reserved on the heat transfer plate.

[0011] Furthermore, in the above-mentioned hanging basket for a nuclear fuel assembly container, the edge of the heat transfer plate is provided with a notch; and the heat transfer plate is provided with a drainage hole.

[0012] Furthermore, in the above-mentioned hanging basket for a nuclear fuel assembly container, the connecting rod is a threaded rod, which is fixedly connected to the top plate of the top plate assembly through a nut and fixedly connected to the bottom plate assembly through a spacer.

[0013] Furthermore, in the above-mentioned hanging basket for the nuclear fuel assembly container, the top plate assembly includes a top plate, a support ring plate and a first rib plate; the support ring plate is arranged at the edge of the top plate; and the first rib plate is arranged above the top plate.

[0014] Furthermore, in the above-mentioned hanging basket for a nuclear fuel assembly container, the bottom plate assembly includes a bottom plate and a second rib plate; the second rib plate is arranged below the bottom plate.

[0015] Furthermore, in the above-mentioned hanging basket for a nuclear fuel assembly container, an outer plate is provided outside the outer wall of the storage sleeve, and a neutron absorbing material is provided between the outer plate and the outer wall.

[0016] The beneficial effects of the present invention are:

[0017] 1. The hanging basket of the present invention is used in conjunction with a transport container and is placed in the inner cavity of the transport container to support the fuel assembly during operation and transportation, thereby improving the impact resistance and ensuring transportation safety;

[0018] 2. The present invention limits the displacement of the storage sleeve along the axial direction of the nuclear fuel assembly container cylinder through the top plate assembly and the bottom plate assembly, supports the storage sleeve through the high-strength support plate and limits the displacement of the storage sleeve along the radial and circumferential directions of the cylinder, thereby ensuring the impact resistance of the container;

[0019] 3. The present invention enhances the heat transfer effect of the hanging basket through the heat transfer plate, reduces the heat accumulation of nuclear fuel, and ensures transportation safety;

[0020] 4. The present invention ensures that the fuel assembly is in a subcritical state by storing the neutron absorbing material outside the outer wall of the casing, thereby ensuring the transportation safety of the nuclear fuel inside the transport container;

[0021] 5. The heat transfer plate is installed through the third positioning block, and a gap is left on the heat transfer plate to help prevent the heat transfer plate from deforming due to thermal expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a schematic structural diagram of a hanging basket for a nuclear fuel assembly container according to an embodiment of the present invention.

[0023] Figure 2 It is a schematic structural diagram of the heat transfer plate of the hanging basket of the present invention.

[0024] Figure 3 for Figure 1 A partial enlarged view of area I in the middle.

[0025] Figure 4 for Figure 2 A partial enlarged view of the middle II area.

[0026] In the above drawings, 1, top plate; 2, top plate assembly; 3, anti-loosening washer; 4, first rib plate; 5, nut; 6, support ring plate; 7, first positioning block; 8, second positioning block; 9, support plate; 10, third positioning block; 11, flat washer; 12, heat transfer plate; 13, storage sleeve; 14, bottom plate assembly; 15, bottom plate; 16, pad; 17, second rib plate; 18, notch; 19, drainage hole; 20, positioning hole; 21, second sleeve mounting hole; 22, connecting rod; 23, gap. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0028] like Figure 1As shown, the present invention provides a hanging basket for a nuclear fuel assembly container, which is placed in the inner cavity of a transport container, and is used to support the fuel assembly during operation and transportation and ensure its subcritical state, and includes a top plate assembly 2, a bottom plate assembly 14, a connecting rod 22, a support plate 9 and a storage sleeve 13; the connecting rod 22 connects the top plate assembly 2 and the bottom plate assembly 14 arranged in parallel; the support plate 9 is parallel to the top plate assembly 2 and is arranged between the top plate assembly 2 and the bottom plate assembly 14; a first sleeve mounting hole is arranged on the support plate 9; the storage sleeve 13 is installed between the top plate assembly 2 and the bottom plate assembly 14, and is sleeved in the first sleeve mounting hole. In this embodiment, the hanging basket is an open cylindrical structure as a whole, and the support plate 9 is made of high-strength stainless steel plates, a total of 31 pieces; there are 21 groups of storage sleeves 13; the connecting rod 22 is a threaded rod, a total of 6. The threaded rod is fixedly connected to the top plate 1 of the top plate assembly 2 through a nut 5, and is fixedly connected to the bottom plate assembly 14 through a pad 16. Specifically, the upper end of the connecting rod 22 passes through the top plate 1 and is tightened by the nut 5, and a locking washer 3 is arranged between the top plate 1 and the nut 5, and the lower end passes through the bottom plate 15 and is tightened by the cushion block 16. The top plate assembly 2 includes a top plate 1, a support ring plate 6 and a first rib plate 4; the support ring plate 6 is arranged at the edge of the top plate 1; the first rib plate 4 is arranged above the top plate 1. There are two first rib plates 4, which are welded to the top plate 1 with the support ring plate 6, and the first rib plate 4 and the support ring plate 6 both play the role of protecting the nut 5. The bottom plate assembly 14 includes a bottom plate 15 and a second rib plate 17; the second rib plate 17 is arranged below the bottom plate 15, and the second rib plate 17 and the cushion block 16 support the hanging basket, ensure that a certain gap is left between the bottom of the hanging basket and the transport container, and enhance the fluidity of the water at the bottom of the hanging basket.

[0029] Furthermore, in order to avoid heat accumulation and ensure good heat transfer performance, the hanging basket of the present invention further includes a heat transfer plate 12 (in this embodiment, the heat transfer plate 12 is made of aluminum, a total of 20 pieces, arranged in the lower middle part of the hanging basket, and inserted between adjacent support plates 9 to obtain the best heat transfer effect); the heat transfer plate 12 is parallel to the support plate 9 and is arranged between the top plate assembly 2 and the bottom assembly; Figure 2 As shown, the heat transfer plate 12 is provided with a positioning hole 20 and a second sleeve mounting hole 21 for constraining the storage sleeve 13; the connecting rod 22 passes through the positioning hole 20. The heat transfer plate 12 has a smaller diameter than the support plate 9 to avoid thermal expansion and contact with the inner wall of the transport container (not shown in the figure). The positioning hole 20 is a round hole matching the connecting rod 22. The heat transfer plate 12 also has a gap 23 extending from the positioning hole 20 to the edge of the heat transfer plate 12 (as shown in the figure). Figure 4 The heat transfer plate 12 is provided with a notch 18 at its edge and a drainage hole 19 on the heat transfer plate 12.

[0030] In this embodiment, the specific installation method of the heat transfer plate 12 is as follows: Figure 3 As shown, the heat transfer plate 12 is relatively fixed to the connecting rod 22 through the positioning hole 20, the flat washer 11 and the third positioning block 10; the third positioning block 10 is sleeved on the connecting rod 22, and a locking opening is provided on the surface; flat washers 11 are provided on the upper and lower sides of the positioning hole 20 of the heat transfer plate 12, and the flat washers 11 are locked into the locking openings to fix the heat transfer plate 12 and the connecting rod 22 relatively. The third positioning block 10 is a stepped positioning block, and the stepped openings of the two stepped positioning blocks are combined into a locking opening. The heat transfer plate 12 is locked into the locking opening through the flat washer 11, which can achieve support on the one hand and prevent the heat transfer plate 12 from contacting the connecting rod 22 due to thermal expansion on the other hand.

[0031] Since there are no less than two support plates 9 in this embodiment, the specific connection method is that the support plates 9 and the support plates 9 and / or the support plates 9 and the bottom plate assembly 14 are supported by the second positioning block 8; the second positioning block 8 is sleeved on the connecting rod 22, the upper end abuts against the support plate 9, and the lower end abuts against the support plate 9 or the bottom plate assembly 14; the support plate 9 and the top plate assembly 2 are supported by the first positioning block 7, the first positioning block 7 is sleeved on the connecting rod 22, the upper end abuts against the top plate assembly 2, and the lower end abuts against the support plate 9. A specific form of the first positioning block 7 and the second positioning block 8 to achieve the above functions is: the first positioning block 7 and the second positioning block 8 are both square cross-sections, and are processed with threaded holes that match the connecting rod 22.

[0032] In this embodiment, the shape and size of the first sleeve installation hole (not shown in the figure) and the second sleeve installation hole 21 match the storage sleeve 13. The storage sleeve 13 has a square cross section and is installed in the cavity formed by the first sleeve installation hole of the support plate 9 and the second sleeve installation hole 21 on the heat transfer plate 12 to load the nuclear fuel assembly. An outer plate is arranged outside the outer wall of the storage sleeve 13, and a neutron absorbing material is arranged between the outer plate and the outer wall. An arched drainage hole 19 is arranged at the bottom of the storage sleeve 13 to facilitate water flow in and out.

[0033] In this embodiment, drainage holes 19 are processed on the top plate assembly 2, the support plate 9, the heat transfer plate 12 and the bottom plate assembly 14 to facilitate water flow between the plates. Notches 18 are opened on the edges of the top plate assembly 2, the support plate 9, the heat transfer plate 12 and the bottom plate 15 to install the drainage pipe assembly.

[0034] The hanging basket of the present invention is used in conjunction with a transport container and is placed in the inner cavity of the transport container to support the fuel assembly during operation and transportation, thereby improving the impact resistance and ensuring transportation safety. The top plate assembly 2 and the bottom plate assembly 14 limit the axial displacement of the storage sleeve 13 along the cylinder of the nuclear fuel assembly container, and the high-strength support plate 9 supports the storage sleeve 13 and limits the radial and circumferential displacement of the storage sleeve 13 along the cylinder, thereby ensuring the impact resistance of the container. The heat transfer plate 12 enhances the heat transfer effect of the hanging basket, reduces the heat accumulation of the nuclear fuel, and ensures transportation safety. The neutron absorbing material on the outer side of the outer wall of the storage sleeve 13 ensures that the fuel assembly is in a subcritical state, thereby ensuring the transportation safety of the nuclear fuel inside the transport container. The heat transfer plate 12 is installed through the third positioning block 10, and a gap 23 is left on the heat transfer plate 12, which helps to prevent the heat transfer plate 12 from deforming due to thermal expansion.

[0035] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A hanging basket for a nuclear fuel assembly container, characterized in that: The invention comprises a top plate assembly (2), a bottom plate assembly (14), a connecting rod (22), a support plate (9) and a storage sleeve (13); the connecting rod (22) connects the top plate assembly (2) and the bottom plate assembly (14) which are arranged in parallel; the support plate (9) is parallel to the top plate assembly (2) and is arranged between the top plate assembly (2) and the bottom plate assembly (14); a first sleeve mounting hole is arranged on the support plate (9); the storage sleeve (13) is installed between the top plate assembly (2) and the bottom plate assembly (14) and is sleeved in the first sleeve mounting hole; and the invention also comprises a heat transfer plate (12), the heat transfer plate (12) is parallel to the support plate (9) and is arranged between the top plate assembly (2) and the bottom assembly; the heat transfer plate (12) is provided with A positioning hole (20) and a second sleeve mounting hole (21) for constraining the storage sleeve (13); the connecting rod (22) passes through the positioning hole (20); the heat transfer plate (12) is relatively fixed to the connecting rod (22) through the positioning hole (20), the flat washer (11) and the third positioning block (10); the third positioning block (10) is sleeved on the connecting rod (22) and is provided with a locking opening on its surface; flat washers (11) are provided on the upper and lower sides of the positioning hole (20) of the heat transfer plate (12), and the flat washer (11) is locked into the locking opening so that the heat transfer plate (12) and the connecting rod (22) are relatively fixed; and a gap (23) extending from the positioning hole (20) to the edge of the heat transfer plate (12) is also left on the heat transfer plate (12).

2. The hanging basket for a nuclear fuel assembly container according to claim 1, characterized in that: There are at least two support plates (9); the support plates (9) and / or the support plates (9) and the bottom plate assembly (14) are supported by a second positioning block (8); the second positioning block (8) is sleeved on the connecting rod (22), with the upper end abutting against the support plate (9) and the lower end abutting against the support plate (9) or the bottom plate assembly (14); the support plate (9) and the top plate assembly (2) are supported by a first positioning block (7); the first positioning block (7) is sleeved on the connecting rod (22), with the upper end abutting against the top plate assembly (2) and the lower end abutting against the support plate (9).

3. The hanging basket for a nuclear fuel assembly container according to claim 1, characterized in that: The edge of the heat transfer plate (12) is provided with a notch (18); and the heat transfer plate (12) is provided with a drainage hole (19).

4. The hanging basket for a nuclear fuel assembly container according to claim 1, characterized in that: The connecting rod (22) is a threaded rod, which is fixedly connected to the top plate (1) of the top plate assembly (2) via a nut (5) and fixedly connected to the bottom plate assembly (14) via a cushion block (16).

5. The hanging basket for a nuclear fuel assembly container according to claim 4, characterized in that: The top plate assembly (2) comprises a top plate (1), a support ring plate (6) and a first rib plate (4); the support ring plate (6) is arranged at the edge of the top plate (1); and the first rib plate (4) is arranged above the top plate (1).

6. The hanging basket for a nuclear fuel assembly container according to claim 4, characterized in that: The bottom plate assembly (14) comprises a bottom plate (15) and a second rib plate (17); the second rib plate (17) is arranged below the bottom plate (15).

7. The hanging basket for a nuclear fuel assembly container according to any one of claims 1 to 6, characterized in that: An outer plate is arranged outside the outer wall of the storage casing (13), and a neutron absorbing material is arranged between the outer plate and the outer wall.

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