Marine arc-shaped reactor cabin corner shielding structure and ship

Abstract

The invention provides an arc-shaped reactor cabin corner shielding structure for a ship and a ship, the arc-shaped reactor cabin corner shielding structure is arranged in a frame type grillwork of a reactor cabin, the shielding structure is an arc-shaped structure formed by splicing layered and partitioned arc-shaped plates layer by layer, the radius R of each layer of arc-shaped plates is gradually increased from inside to outside, and the radius R of each layer of arc-shaped plates is larger than the radius R of each layer of arc-shaped plates. Comprising a shielding material A, fixing strip steel, a shielding material B, a shielding material C, angle steel and a cladding steel plate. The fixing steel bars are used for welding and fixing after the shielding material A is laid, and the unoccupied part of the layer is filled and leveled up with the shielding material B. The angle steel is used for welding and fixing after laying of the shielding material C; the covering steel plates are laid on the outer side of the stacking cabin structure and used for sealing the installation grids. According to the technical scheme, the problems of shielding integrity and light weight of the arc-shaped corner part of the reactor cabin in a nuclear power ship and a nuclear power floating platform can be solved, leakage of reactor radiation to the peripheral area is weakened to the maximum extent, and the radiation safety of personnel and equipment in the peripheral area is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear radiation protection, and in particular relates to a ship-used arc-shaped stack corner shielding structure and a ship. Background Art

[0002] At present, nuclear-powered ships and nuclear-powered floating platforms usually adopt a large-sized square reactor compartment structure. To avoid stress concentration, the corners of the reactor compartment generally adopt an arc-shaped structure. In order to reduce the radiation effect of neutrons, gamma rays and other radioactive rays in the reactor compartment on personnel in adjacent compartments, a reactor compartment shield is set in the reactor compartment structure.

[0003] Therefore, how to provide a ship-borne arc-shaped reactor compartment corner shielding structure and a ship that can solve the shielding integrity and lightweight problems of the arc-shaped corners of the reactor compartment in nuclear-powered ships and nuclear-powered floating platforms, minimize the leakage of reactor radiation to the surrounding areas, and ensure the radiation safety of personnel and equipment in the surrounding areas has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The embodiment of the present invention provides a marine arc-shaped reactor compartment corner shielding structure and a ship, which can solve the shielding integrity and lightweight problems of the arc-shaped corner parts of the reactor compartment in nuclear-powered ships and nuclear-powered floating platforms, minimize the leakage of reactor radiation to the surrounding areas, and ensure the radiation safety of personnel and equipment in the surrounding areas.

[0005] In one embodiment of the present invention, a ship-based arc-shaped reactor compartment corner shielding structure is provided, which is arranged in a frame-type grid of a reactor compartment. The shielding structure is an arc-shaped structure formed by assembling layer-by-layer arc-shaped plates, and the radius R of each layer of the arc-shaped plate gradually increases from the inside to the outside. The shielding structure includes: shielding material A1, fixed steel bars 2, shielding material B3, shielding material C4, angle steel 5 and covering steel plate 6.

[0006] The shielding structure is laid outward layer by layer close to the ship compartment bulkhead, and the fixed steel bars 2 are evenly arranged for welding and fixing after the shielding material A1 is laid. The remaining part of this layer is filled with shielding material B3.

[0007] Angle steel 5 is used for welding and fixing after the shielding material C4 is laid; cladding steel plate 6 is laid on the outside of the cabin structure and is used for installing the seal of the grid to protect the internal shielding material of the cabin structure;

[0008] In the shielding structure, from inside to outside, there are shielding material A1, shielding material B2 and shielding material C3.

[0009] Furthermore, the bending radius of each plate in the shielding material A1, the shielding material B3, the shielding material C4 and the covering steel plate 6 matches, and the shielding structure is an arc structure assembled layer by layer with layered and divided arc-shaped plates, and is fixed by welding with fixed steel bars 2 and angle steels 5.

[0010] Furthermore, the shielding material A1 is one or more of heavy materials including at least lead, tungsten and iron.

[0011] Furthermore, the shielding material B3 is at least one of lightweight materials having certain heat insulation properties, including polyethylene and a heat-resistant resin-based material.

[0012] Furthermore, the shielding material C4 includes at least one or more of polyethylene, boron-containing polyethylene, lead-boron polyethylene and heat-resistant resin-based materials.

[0013] Furthermore, shielding material A1 is divided into 5 layers, including: 3 layers with a thickness of 20 mm and 2 layers with a thickness of 15 mm; shielding material B3 is 1 layer with a thickness of 10 mm; shielding material C4 is divided into 12 layers, including: 10 layers with a thickness of 25 mm and 2 layers with a thickness of 15 mm.

[0014] Furthermore, in the shielding material A1, the shielding material B3 and the shielding material C4, each layer is divided into 15 pieces; among them, in the height direction, each piece is 300 mm, and a total of 5 pieces are divided; in the width direction, it is divided into 4 pieces, which are equally divided according to the angle.

[0015] In yet another embodiment of the present invention, a ship is provided, the ship comprising a ship-use circular arc type stack corner shielding structure as described in any one of the above items.

[0016] The beneficial effects brought by the present invention are as follows:

[0017] It can be seen from the above scheme that the embodiment of the present invention provides a marine arc-shaped reactor compartment corner shielding structure and a ship, which are arranged in the frame-type grid of the reactor compartment. The shielding structure is an arc structure assembled layer by layer of arc-shaped plates, and the radius R of each layer of arc-shaped plates gradually increases from the inside to the outside, including: shielding material A, fixed steel bars, shielding material B, shielding material C, angle steel and cladding steel plate. The shielding structure is laid outward layer by layer close to the reactor compartment bulkhead. The fixed steel bars are used for welding and fixing after the shielding material A is laid, and the remaining part of this layer is filled with shielding material B. The angle steel is used for welding and fixing after the shielding material C is laid; the cladding steel plate is laid on the outside of the reactor compartment structure for installing the grid seal. The technical scheme of the present invention can solve the shielding integrity and lightweight problems of the arc-shaped corner parts of the reactor compartment in nuclear-powered ships and nuclear-powered floating platforms, minimize the leakage of reactor radiation to the surrounding area, and ensure the radiation safety of personnel and equipment in the surrounding area. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A horizontal cross-sectional schematic diagram showing a ship-used circular arc-shaped stack corner shielding structure according to an embodiment of the present invention;

[0019] Figure 2 A schematic longitudinal section diagram showing a ship arc-shaped stack corner shielding structure according to an embodiment of the present invention;

[0020] Figure 3 A schematic diagram showing a single-layer component structure of a marine arc-shaped stack corner shielding structure according to an embodiment of the present invention;

[0021] In the figure, 1 is shielding material A, 2 is fixing bar steel, 3 is shielding material B, 4 is shielding material C, 5 is angle steel, and 6 is covering steel plate. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figures 1 to 3 As shown, Figure 1 A horizontal cross-sectional schematic diagram showing a ship-used circular arc-shaped stack corner shielding structure according to an embodiment of the present invention; Figure 2 A schematic longitudinal section diagram showing a ship arc-shaped stack corner shielding structure according to an embodiment of the present invention; Figure 3 A schematic diagram of a single-layer component structure of a marine arc-shaped stack corner shielding structure according to an embodiment of the present invention is shown.

[0024] In the figure, a ship-used arc-shaped reactor compartment corner shielding structure is arranged in a frame-type grid of a reactor compartment. The shielding structure is an arc-shaped structure formed by assembling layer-by-layer arc-shaped plates. The radius R of each layer of the arc-shaped plate increases gradually from the inside to the outside. The shielding structure includes: shielding material A1, fixed steel bars 2, shielding material B3, shielding material C4, angle steel 5 and covering steel plate 6.

[0025] The shielding structure is laid outward layer by layer close to the ship compartment bulkhead, and the fixed steel bars 2 are evenly arranged for welding and fixing after the shielding material A1 is laid. The remaining part of this layer is filled with shielding material B3.

[0026] Angle steel 5 is used for welding and fixing after the shielding material C4 is laid; cladding steel plate 6 is laid on the outside of the cabin structure and is used for installing the seal of the grid to protect the internal shielding material of the cabin structure;

[0027] In the shielding structure, from inside to outside, there are shielding material A1, shielding material B2 and shielding material C3.

[0028] In the embodiment of the present invention, a marine arc-shaped reactor compartment corner shielding structure is arranged in the frame-type grid of the reactor compartment, in the form of an arc-shaped structure assembled layer by layer of arc-shaped plates, and fixed by welding with steel bars, angle steels, etc. The technical solution of the present invention has a simple structure, light weight, convenient assembly, and can be disassembled and maintained. It can be continuous and consistent with the shielding of other reactor compartments, ensure the closure and integrity of the shielding structure, minimize the leakage of reactor radiation to the surrounding area, and ensure the radiation safety of personnel and equipment in the surrounding area.

[0029] Among them, in order to facilitate the construction workers to carry and install, in the arc-shaped cabin corner shielding structure of the present invention, each layer of plate is divided into multiple small pieces. The weight of a single piece of material generally does not exceed 25kg, and the size generally does not exceed 500mm*500mm. The thickness of each layer can be one of 10mm, 15mm, 20mm, and 25mm.

[0030] In one embodiment of the present invention, the bending radii of each plate in the shielding material A1, the shielding material B3, the shielding material C4 and the covering steel plate 6 match, and the shielding structure is an arc structure assembled layer by layer by layered and divided arc-shaped plates, and is fixed by welding with fixed steel bars 2 and angle steels 5.

[0031] In one embodiment of the present invention, the shielding material A1 is one or more heavy material including at least lead, tungsten and iron.

[0032] In one embodiment of the present invention, the shielding material B3 is at least one of lightweight materials having certain heat insulation properties, including polyethylene and a heat-resistant resin-based material.

[0033] In one embodiment of the present invention, the shielding material C4 includes at least one or more of polyethylene, boron-containing polyethylene, lead-boron polyethylene and heat-resistant resin-based materials.

[0034] In one embodiment of the present invention, shielding material A1 is divided into 5 layers, including: 3 layers with a thickness of 20 mm and 2 layers with a thickness of 15 mm; shielding material B3 is 1 layer with a thickness of 10 mm; shielding material C4 is divided into 12 layers, including: 10 layers with a thickness of 25 mm and 2 layers with a thickness of 15 mm.

[0035] In one embodiment of the present invention, each layer of shielding material A1, shielding material B3 and shielding material C4 is divided into 15 pieces; in the height direction, each piece is 300 mm long, and a total of 5 pieces are divided; in the width direction, it is divided into 4 pieces, equally divided by angle.

[0036] In one embodiment of the present invention, an arc-shaped reactor compartment corner shielding structure is arranged in a frame structure of an arc-shaped corner of a reactor compartment, and is specifically an arc-shaped structure formed by assembling arc-shaped plates layer by layer, and the radius R of each layer of arc-shaped plates gradually increases from the inside to the outside. The shielding structure mainly comprises six materials: shielding material A, fixing bar steel, shielding material B, shielding material C, angle steel and cladding steel plate.

[0037] The following takes the case where the shielding material A is lead (thickness 90 mm), the shielding material B is polyethylene (thickness 10 mm), the shielding material C is polyethylene (thickness 280 mm), the grid height is 1500 mm, and the arc radius of the bulkhead is 1000 mm as an example to illustrate the specific implementation process of the technical solution of the present invention:

[0038] Taking into account the density of the material and the size of the grid, the shielding material is divided into multiple layers, and each layer of material is divided into multiple blocks. Specifically, shielding material A (lead) is divided into 5 layers, 3 layers with a thickness of 20mm, and 2 layers with a thickness of 15mm; shielding material B (polyethylene) is divided into 1 layer with a thickness of 10mm; shielding material C (polyethylene) is divided into 12 layers, 10 layers with a thickness of 25mm, and 2 layers with a thickness of 15mm. Each layer is divided into 15 blocks, of which one is about 300mm in height, and a total of 5 blocks; it is divided into 4 blocks in width, divided equally according to the angle. Among them, ensure that the weight of each piece of material does not exceed 25kg.

[0039] Specifically, during design and production, special attention should be paid to the matching of the bending radius of each plate, and attention should be paid to the placement of materials during installation to avoid deformation of the material resulting in excessive installation gaps.

[0040] In an embodiment of the present invention, a process for installing an arc-shaped reactor compartment corner shielding structure specifically includes:

[0041] A) Install shielding material A (lead) from bottom to top and from left to right. After installing one layer and filling the seams, start installing the next layer until all shielding materials A are installed. During the installation process, the shielding material can be properly cut and polished in the weld seams and weld corners to better fit the steel structure.

[0042] B) Weld and fix the steel bars, arrange the steel bars evenly, and ensure that all shielding material A (lead) is compacted to ensure effective fixation of shielding material A (lead). Fill the remaining space in this layer with shielding material B (polyethylene).

[0043] C) Install shielding material C (polyethylene). The installation principles and sequence are similar to those of shielding material A (lead).

[0044] D) Angle steel is welded on the outside of the shielding material C (polyethylene). The angle steel is evenly arranged to ensure that all shielding materials C (polyethylene) are compacted to achieve effective fixation of the shielding material.

[0045] E) Weld and fix cladding steel plates on the outside of the cabin structure to protect the internal shielding materials.

[0046] In an embodiment of the present invention, a ship-based arc-shaped reactor compartment corner shielding structure is simple in structure, light in weight, easy to assemble, and can be disassembled and maintained. It can be continuous and consistent with the shielding of other reactor compartments, ensuring the closure and integrity of the shielding structure, minimizing the leakage of reactor radiation to the surrounding areas, and ensuring the radiation safety of personnel and equipment in the surrounding areas.

[0047] In yet another embodiment of the present invention, a ship is provided, the ship comprising a ship-use circular arc type stack corner shielding structure as described in any one of the above items.

[0048] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A marine arc-shaped reactor compartment corner shielding structure, arranged in a frame-type grid of a reactor compartment, characterized in that: The shielding structure is an arc-shaped structure formed by assembling arc-shaped plates layer by layer, wherein the radius R of each layer of arc-shaped plates gradually increases from the inside to the outside, and comprises: shielding material A (1), fixing steel bars (2), shielding material B (3), shielding material C (4), angle steel (5) and cladding steel plates (6); The shielding structure is laid outward layer by layer close to the ship compartment bulkhead, and the fixing bars (2) are evenly arranged and used for welding and fixing the shielding material A (1) after the shielding material A (1) is laid, wherein the remaining part of this layer is filled with the shielding material B (3); The angle steel (5) is used for welding and fixing the shielding material C (4) after it is laid. The cladding steel plate (6) is laid on the outside of the cabin structure and is used for installing the grid seal to protect the internal shielding material of the cabin structure. In the shielding structure, from inside to outside, there are shielding material A (1), shielding material B (2) and shielding material C (3).

2. The arc-shaped ship compartment corner shielding structure according to claim 1 is characterized in that: The bending radii of the shielding material A (1), the shielding material B (3), the shielding material C (4) and the cladding steel plate (6) match each other. The shielding structure is an arc-shaped structure formed by assembling layer-by-layer arc-shaped plates, and is fixed by welding using the fixing steel bars (2) and angle steels (5).

3. The arc-shaped ship compartment corner shielding structure according to claim 1 is characterized in that: The shielding material A(1) is one or more heavy material including at least lead, tungsten and iron.

4. The arc-shaped ship compartment corner shielding structure according to claim 1 is characterized in that: The shielding material B (3) is at least one of lightweight materials with certain heat insulation properties, including polyethylene and heat-resistant resin-based materials.

5. The arc-shaped ship compartment corner shielding structure according to claim 1, characterized in that: The shielding material C (4) includes at least one or more of polyethylene, boron-containing polyethylene, lead-boron polyethylene and heat-resistant resin-based materials.

6. The arc-shaped ship compartment corner shielding structure according to claim 1, characterized in that: The shielding material A (1) is divided into 5 layers, including: 3 layers with a thickness of 20 mm and 2 layers with a thickness of 15 mm; the shielding material B (3) is 1 layer with a thickness of 10 mm; the shielding material C (4) is divided into 12 layers, including: 10 layers with a thickness of 25 mm and 2 layers with a thickness of 15 mm.

7. A ship arc-shaped stack corner shielding structure according to claim 6, characterized in that: Each layer of the shielding material A (1), shielding material B (3) and shielding material C (4) is divided into 15 pieces. In the height direction, each piece is 300 mm long, which is divided into 5 pieces in total. In the width direction, it is divided into 4 pieces, which are equally divided according to the angle.

8. A ship, characterized in that: The ship comprises a ship-use circular arc type stack corner shielding structure as described in any one of claims 1 to 7.

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