Ship bottom shielding structure combining a bilge shielding and a stack bottom shielding

Abstract

The application discloses a marine bottom shielding structure combining a cabin bottom shielding structure and a stack bottom shielding structure, which comprises the cabin bottom shielding structure and the stack bottom shielding structure located on the lower plate of the double bottom of a ship body, and a stack cabin shielding structure and a primary shielding structure located on the upper plate of the double bottom of the ship body, wherein the primary shielding structure is wrapped outside a reactor pressure vessel, the stack cabin shielding structure is located outside the primary shielding structure, the cabin bottom shielding structure is located outside the stack bottom shielding structure, and the stack bottom shielding structure is located below the primary shielding structure. The marine bottom shielding structure combining the cabin bottom shielding structure and the stack bottom shielding structure has simple structure, can form a complete radiation shielding system together with the stack cabin shielding structure, the primary shielding structure and seawater below the ship body, and can weaken the radiation leakage of the stack cabin to the surrounding area to the maximum extent, so as to ensure the radiation safety of personnel and equipment in the surrounding area.

Description

Technical Field

[0001] This invention relates to the field of nuclear radiation protection technology, and in particular to a marine bottom shielding structure that combines hull shielding and reactor bottom shielding. Background Technology

[0002] Nuclear-powered ships and floating platforms have a double-bottom structure beneath the reactor compartment, resulting in a large cavity between the reactor compartment and the seawater beneath the hull. Neutrons and gamma rays within the reactor compartment are violently backscattered by the seawater and the double-bottom structure, causing the radiation field in adjacent compartments to exceed safe limits and affecting the radiation safety of personnel and equipment in those compartments. Summary of the Invention

[0003] The main objective of this invention is to provide a marine bottom shielding structure that combines bottom shielding and reactor bottom shielding. The aim is to create a closed shielding system by setting a bottom shield on the double bottom, which together with the reactor bottom shielding, the primary shielding, and the seawater below the hull, thereby minimizing the scattering of neutrons and gamma rays from the reactor compartment to the adjacent area.

[0004] To achieve the above objectives, the present invention provides a marine bottom shielding structure combining hull shielding and slab bottom shielding, comprising a hull shielding structure and a slab bottom shielding structure located on the double bottom plate of the hull, and a slab shielding structure and a primary shielding structure located on the upper bottom plate of the double bottom plate of the hull, wherein...

[0005] The primary shielding structure is wrapped around the reactor pressure vessel. The pod shielding structure is located outside the primary shielding structure, the bottom shielding structure is located outside the bottom shielding structure, and the bottom shielding structure is located below the primary shielding structure.

[0006] Preferably, the hull bottom shielding structure and the stack bottom shielding structure are both enclosed to form a closed structure, and both the hull bottom shielding structure and the stack bottom shielding structure are sealed to the hull structure.

[0007] Preferably, a gap is provided between the hull shielding structure and the stack bottom shielding structure.

[0008] Preferably, the inner side of the bilge shielding structure should be flush with the inner side of the stacker shielding structure.

[0009] Preferably, the hull bottom shielding structure and the stack bottom shielding structure include a steel sleeve and a shielding material housed in the steel sleeve. The shielding material is one or more of lead, polyethylene, boron-containing polyethylene, lead-boron polyethylene, heat-resistant resin-based material, shielding putty, boron steel, and steel plate.

[0010] Preferably, the top surfaces of the hull bottom shielding structure and the stack bottom shielding structure are fixedly connected to the lower end surface of the double-layer bottom plate of the hull, and the bottom end surfaces of the hull bottom shielding structure and the stack bottom shielding structure are fixedly connected to the upper end surface of the double-layer bottom plate of the hull.

[0011] Preferably, the bottom shielding structure adopts a U-shaped structure.

[0012] Preferably, the inner contour of the reactor bottom shielding structure completely encloses the projection area of ​​the reactor pressure vessel in the double bottom.

[0013] Preferably, the bottom shielding structure is annular or a polygonal shape similar to the frame-type double-layer bottom structure.

[0014] The marine bottom shielding structure proposed in this invention combines hull shielding and hull bottom shielding. Its structure is simple and can form a complete radiation shielding system with hull shielding, primary shielding and seawater below the hull. This minimizes the leakage of radiation from the hull to the surrounding area and ensures the radiation safety of personnel and equipment in the surrounding area. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the marine bottom shielding structure that combines hull shielding and stack bottom shielding according to the present invention.

[0016] Figure 2 This is a top view schematic diagram of the first structure of the marine bottom shielding structure combining hull shielding and stack bottom shielding of the present invention.

[0017] Figure 3 This is a top view schematic diagram of the second type of marine bottom shielding structure that combines hull shielding and stack bottom shielding according to the present invention.

[0018] In the diagram, 1-Reactor pressure vessel, 2-Dump shielding structure, 3-Primary shielding structure, 4-Bottom shielding structure, 5-Bottom shielding structure, 6-Double-layer upper plate, 7-Double-layer lower plate.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0021] It should be noted that in the description of this invention, the terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] Reference Figure 1 In this preferred embodiment, a marine bottom shielding structure combining hull shielding and stack bottom shielding includes a hull shielding structure 4 and a stack bottom shielding structure 5 located on the double bottom plate 7 of the hull, and a stack shielding structure 2 and a primary shielding structure 3 located on the double bottom plate 6 of the hull.

[0023] The primary shielding structure 3 is wrapped around the outside of the reactor pressure vessel 1. The reactor compartment shielding structure 2 is located outside the primary shielding structure 3. The bottom shielding structure 4 is located outside the bottom shielding structure 5. The bottom shielding structure 5 is located below the primary shielding structure 3. The bottom shielding structure 4 is located below the reactor compartment shielding structure 2.

[0024] Specifically, in this embodiment, both the bottom shielding structure 4 and the bottom shielding structure 5 are enclosed to form a closed structure (that is, from...). Figure 2 and Figure 3 From this top-down view, the area enclosed by the bilge shielding structure 4 and the sump shielding structure 5 is a closed structure, thus ensuring its shielding effect. Both the bilge shielding structure 4 and the sump shielding structure 5 are sealed to the hull structure, thus further ensuring their shielding effect.

[0025] Furthermore, a gap is provided between the bottom shielding structure 4 and the bottom shielding structure 5. By adopting a two-stage shielding structure, the weight of this shielding structure can be reduced compared to using a large shielding structure.

[0026] Furthermore, the inner side of the bilge shielding structure 4 should be flush with the inner side of the stack shielding structure 2 to ensure the shielding effect.

[0027] Specifically, the bilge shielding structure 4 and the stack bottom shielding structure 5 include a steel sleeve and a shielding material contained in the steel sleeve. The shielding material is one or more of the following: lead, polyethylene, boron-containing polyethylene, lead-boron polyethylene, heat-resistant resin-based material, shielding putty, boron steel, and steel plate.

[0028] Reference Figure 1The top surfaces of both the bilge shielding structure 4 and the stoker bottom shielding structure 5 are fixedly connected to the lower surface of the double bottom plate 6 of the hull, and the bottom surfaces of both the bilge shielding structure 4 and the stoker bottom shielding structure 5 are fixedly connected to the upper surface of the double bottom plate 7 of the hull. In other words, the height of the bilge shielding structure 4 and the stoker bottom shielding structure 5 extends through the height of the double bottom plate 7 of the hull.

[0029] In this embodiment, refer to Figure 2 and Figure 3 The preferred bottom shielding structure 4 adopts a U-shaped structure, which is easy to manufacture.

[0030] Furthermore, the inner contour of the reactor bottom shielding structure 5 completely encloses the projection area of ​​the reactor pressure vessel 1 in the double bottom, and the outer contour or main area of ​​the reactor bottom shielding structure 5 should not exceed the projection area of ​​the primary shielding structure 3 in the double bottom.

[0031] Specifically, the bottom shielding structure 5 is annular (e.g., Figure 3 (as shown) or a polygonal shape similar to a framed double-bottom structure (such as...) Figure 2 (As shown).

[0032] During the design and installation of the dam shielding structure 2, the characteristics of the double-bottom structure and the construction process should be fully considered. The installation route and steps should be planned reasonably to ensure that each installation position is accessible and has sufficient installation space, so as to fully guarantee the integrity and installation quality of the dam shielding structure 2.

[0033] The marine bottom shielding structure proposed in this embodiment, which combines hull shielding and hull bottom shielding, has a simple structure and can form a complete radiation shielding system with hull shielding, primary shielding and seawater below the hull. This minimizes the leakage of radiation from the hull to the surrounding area and ensures the radiation safety of personnel and equipment in the surrounding area.

[0034] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A marine bottom shielding structure combining a bilge shielding and a stack bottom shielding, characterized by, The bottom shielding structure and the bottom shielding structure are both enclosed to form a closed structure, and the bottom shielding structure and the bottom shielding structure are both sealedly connected with the hull structure. A gap is arranged between the bottom shielding structure and the bottom shielding structure.

2. The bottom shielding structure for a ship according to claim 1, wherein The inner side surface of the bottom shielding structure is flush with the inner side surface of the reactor cavity shielding structure.

3. The bottom shielding structure for a ship according to claim 1, wherein The bottom shielding structure and the bottom shielding structure comprise a steel sleeve and shielding material contained in the steel sleeve, and the shielding material is one or more of lead, polyethylene, boron-containing polyethylene, lead-boron polyethylene, temperature-resistant resin-based material, shielding putty, boron steel and steel plate.

4. The bottom shielding structure for a ship according to claim 1, wherein The top end surface of the bottom shielding structure and the bottom shielding structure is fixedly connected with the lower end surface of the upper plate of the double-bottom of the hull, and the bottom end surface of the bottom shielding structure and the bottom shielding structure is fixedly connected with the upper end surface of the lower plate of the double-bottom of the hull.

5. The bottom shielding structure for a ship according to claim 1, wherein The bottom shielding structure adopts a Houzi-shaped structure.

6. The bottom shielding structure for a ship according to claim 1, wherein The inner contour of the bottom shielding structure completely envelopes the projection area of the reactor pressure vessel on the double-bottom.

7. The bottom shielding structure for a ship according to claim 1, wherein The bottom shielding structure is a circular ring or a broken line shape same as the frame type double-bottom structure.

8. A ship bottom shielding structure combining a bilge shielding and a pile bottom shielding according to any one of claims 1 to 7, characterized in that, ​

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