Ship reactor bottom structure based on water tank and having shielding function and ship

Abstract

The invention provides a marine reactor bottom structure based on a water tank and having a shielding function and a ship, the marine reactor bottom structure is arranged in a double-layer bottom structure below a reactor, the water tank arranged in the double-layer bottom structure below the reactor is also used as a shielding water tank, and the marine reactor bottom structure comprises a shielding body, a supporting structure and the water tank. In the height direction, the upper end of the shielding body clings to the upper plate of the double-layer bottom structure, and the lower end of the shielding body is partially immersed into the water tank; in the plane direction, the appearance of the shielding body is in a ring shape similar to a primary shielding shape of a reactor bottom structure or in a broken line shape designed along with a frame type double-layer bottom structure. The shielding body, the primary shielding body and the water tank form a closed shielding system, and the shielding body does not exceed the projection area of the primary shielding body in the double-layer bottom structure. According to the technical scheme, the problem that the radiation field of the adjacent cabin of the reactor seriously exceeds the standard due to back scattering of neutrons and gamma rays at the bottom of the reactor in a power ship and a nuclear power floating platform to the adjacent cabin through ship bottom seawater and a double-bottom structure can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear radiation protection, and in particular relates to a marine reactor bottom structure and a ship based on a water tank with a dual shielding function. Background Art

[0002] At present, nuclear-powered ships and nuclear-powered floating platforms have a double bottom structure under the reactor compartment, which results in a large cavity between the reactor and the seawater under the hull. Among them, the neutrons and gamma rays emitted from the bottom of the reactor are strongly backscattered by the seawater at the bottom of the ship and the double bottom structure, which will cause the radiation field in the adjacent cabins to seriously exceed the standard, affecting the radiation safety of personnel and equipment in the adjacent cabins.

[0003] Therefore, how to provide a marine reactor bottom structure and ship based on the dual shielding function of the water tank, which can solve the problem of neutrons and gamma rays at the bottom of the reactor in power ships and nuclear-powered floating platforms being backscattered to adjacent cabins through the seawater at the bottom of the ship and the double bottom structure, further leading to serious exceeding of the radiation field in the adjacent cabins of the reactor, 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 reactor bottom structure and a ship based on the dual shielding function of a water tank, which can solve the problem of neutrons and gamma rays at the bottom of the reactor in power ships and nuclear-powered floating platforms being backscattered to adjacent cabins through the seawater at the bottom of the ship and the double bottom structure, further causing the radiation field in the adjacent cabins of the reactor to seriously exceed the standard.

[0005] In one embodiment of the present invention, a ship reactor bottom structure based on a water tank that also serves as a shielding function is provided, which is arranged in a double bottom structure below the reactor. The water tank arranged in the double bottom structure below the reactor is also used as a shielding water tank. The ship reactor bottom structure includes: a shielding body 1, a supporting structure 2 and a water tank 3.

[0006] In the height direction, the upper end of the shielding body 1 is in close contact with the upper plate of the double bottom structure, and the lower end thereof is partially submerged in the water tank 3;

[0007] In the plane direction, the outer shape of the shield body 1 is a circular ring similar to the primary shield of the bottom structure of the pile or a broken line shape designed with the frame-type double-layer bottom structure;

[0008] The shielding body 1, the primary shielding and the water tank 3 form a closed shielding system, and the shielding body 1 does not exceed the projection area of ​​the primary shielding on the double bottom structure;

[0009] The water level of the water tank 3 is not lower than its design water level, and the range of the water tank 3 is not smaller than the projection area of ​​the primary shielding on the double bottom structure.

[0010] Furthermore, the shielding body 1 includes one or more of polyethylene, boron-containing polyethylene, lead-boron polyethylene, boron aluminum, shielding putty, boron steel and steel plate.

[0011] Furthermore, the shielding body 1 is installed in a layered stacking manner, wherein the shielding body 1 has a complete structure and has no through cavity.

[0012] Furthermore, the shielding body 1 is installed in a casting-molding manner, wherein the shielding body 1 has a complete structure and has no through cavity.

[0013] Furthermore, the support structure 2 is a corrosion-resistant high-strength material structure including at least stainless steel and titanium alloy.

[0014] Furthermore, the lower end portion of the shielding body 1 is submerged in the water tank 3, including:

[0015] The depth of immersion of the lower end portion of the shielding body 1 is determined according to at least the heel, pitch, roll and water usage conditions of the actual platform.

[0016] Furthermore, the ship bottom structure comprises:

[0017] Based on the structural characteristics of the double bottom structure, it is determined that the installation position of the marine bottom structure can be correctly installed.

[0018] In yet another embodiment of the present invention, a ship is provided, the ship comprising any one of the above-mentioned ship bottom structures based on the dual shielding function of the water tank.

[0019] The beneficial effects brought by the present invention are as follows:

[0020] It can be seen from the above scheme that the embodiment of the present invention provides a marine reactor bottom structure and a ship based on the water tank dual-purpose shielding function, which is arranged in the double bottom structure below the reactor, and the water tank arranged in the double bottom structure below the reactor is also used as a shielding water tank, including: a shielding body, a supporting structure and a water tank. In the height direction, the upper end of the shielding body is close to the upper plate of the double bottom structure, and its lower end is partially immersed in the water tank; in the plane direction, the shape of the shielding body is a circular ring similar to the primary shield of the reactor bottom structure or a broken line designed with the frame-type double bottom structure; the shielding body and the primary shielding and the water tank constitute a closed shielding system, and the shielding body does not exceed the projection area of ​​the primary shielding on the double bottom structure; the water level of the water tank is not lower than its design water level, and the range of the water tank is not less than the projection area of ​​the primary shielding on the double bottom structure. The technical solution of the present invention can solve the problem that the neutrons and gamma rays at the bottom of the reactor in the power ship and the nuclear-powered floating platform are backscattered to the adjacent cabins through the seawater at the bottom of the ship and the double bottom structure, further causing the radiation field of the adjacent cabins of the reactor to seriously exceed the standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram showing a typical arrangement of a ship-based reactor bottom structure based on a water tank with a dual shielding function according to an embodiment of the present invention;

[0022] Figure 2 A first schematic plan view showing a ship bottom structure based on a water tank with a shielding function according to an embodiment of the present invention;

[0023] Figure 3 A second schematic plan view showing a ship-based reactor bottom structure based on a water tank with a dual shielding function according to an embodiment of the present invention;

[0024] In the figure, 1 is a shielding body, 2 is a supporting structure, and 3 is a water tank. DETAILED DESCRIPTION

[0025] 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.

[0026] like Figure 1 As shown, Figure 1 A typical layout schematic diagram of a ship bottom structure based on a water tank with a shielding function according to an embodiment of the present invention is shown. Figure 2 A first plan view schematically shows a ship bottom structure based on a water tank with a shielding function according to an embodiment of the present invention, Figure 3 A second schematic plan view of a ship bottom structure based on a water tank with a dual shielding function according to an embodiment of the present invention is shown.

[0027] In the figure, a ship reactor bottom structure based on a water tank that also serves as a shielding function is arranged in a double bottom structure below the reactor. The water tank arranged in the double bottom structure below the reactor is also used as a shielding water tank. The ship reactor bottom structure includes: a shielding body 1, a supporting structure 2 and a water tank 3.

[0028] In the height direction, the upper end of the shielding body 1 is in close contact with the upper plate of the double bottom structure, and the lower end thereof is partially submerged in the water tank 3;

[0029] In the plane direction, the outer shape of the shield body 1 is a circular ring similar to the primary shield of the bottom structure of the pile or a broken line shape designed with the frame-type double-layer bottom structure;

[0030] The shielding body 1, the primary shielding and the water tank 3 form a closed shielding system, and the shielding body 1 does not exceed the projection area of ​​the primary shielding on the double bottom structure;

[0031] The water level of the water tank 3 is not lower than its design water level, and the range of the water tank 3 is not smaller than the projection area of ​​the primary shielding on the double bottom structure.

[0032] In the embodiment of the present invention, in order to solve the problem that the neutrons and gamma rays at the bottom of the reactor in nuclear-powered ships and nuclear-powered floating platforms are backscattered to the adjacent cabins through the seawater at the bottom of the ship and the double bottom structure, resulting in the serious exceeding of the radiation field in the adjacent cabins of the reactor, the water tank arranged in the double bottom below the reactor is also used as a shielding water tank. The shielding structure is arranged in the double bottom structure below the reactor, and has a simple structure, light weight and good shielding effect. Compared with the bottom shielding scheme of the reactor that does not use the water tank under the double bottom as a shielding water tank, the shielding weight can be reduced by 30% to 70% in the technical scheme of the present invention.

[0033] In one embodiment of the present invention, the shielding body 1 includes one or more of polyethylene, boron-containing polyethylene, lead-boron polyethylene, boron aluminum, shielding putty, boron steel and steel plate.

[0034] It is understandable that in other implementations of the embodiments of the present invention, the material of the shielding body 1 may also be selected from other suitable materials as required, and the specific material is not specifically limited here.

[0035] In another embodiment of the present invention, the shielding body 1 is installed in a layered stacking manner, wherein the shielding body 1 has a complete structure and has no through cavity.

[0036] In another embodiment of the present invention, the shielding body 1 is installed by casting, wherein the shielding body 1 has a complete structure and has no through cavity.

[0037] In yet another embodiment of the present invention, the support structure 2 is a corrosion-resistant high-strength material structure including at least stainless steel and titanium alloy.

[0038] Among them, the support structure 2 of the reactor bottom shield needs to be immersed in the water tank for a long time, and its strength should be strong enough and corrosion-resistant. The material can be stainless steel, titanium alloy, etc.

[0039] In another embodiment of the present invention, the lower end portion of the shielding body 1 is submerged in the water tank 3, comprising:

[0040] The depth of immersion of the lower end portion of the shielding body 1 is determined according to at least the heel, pitch, roll and water usage conditions of the actual platform.

[0041] In another embodiment of the present invention, the ship bottom structure comprises:

[0042] Based on the structural characteristics of the double bottom structure, it is determined that the installation position of the marine bottom structure can be correctly installed.

[0043] In yet another embodiment of the present invention, a ship is provided, the ship comprising any one of the above-mentioned ship bottom structures based on the dual shielding function of the water tank.

[0044] In an embodiment of the present invention, a ship bottom structure based on a water tank with a dual shielding function includes: a shielding body 1, a support structure 2, and a water tank 3.

[0045] The upper end of the shielding body 1 of the bottom shielding should be close to the upper plate of the double bottom in the height direction, and the lower end should be partially immersed in the water tank 3. The immersion depth is determined according to the actual heel, pitch, swing and water use conditions of the platform.

[0046] The shielding body 1 of the reactor bottom shielding can be in a circular shape similar to the primary shielding in the plane direction, or in a broken line shape designed with the frame-type double bottom structure. The reactor bottom shielding body should ensure that it forms a closed shielding system with the primary shielding and the water tank, and its main area should not exceed the projection area of ​​the primary shielding on the double bottom as much as possible.

[0047] The material of the shielding body 1 of the bottom shielding can be one or more of polyethylene, boron-containing polyethylene, lead-boron polyethylene, boron aluminum, shielding putty, boron steel, steel plate, etc., and the installation form can be layered stacking or casting molding, but the integrity of the shielding body and the absence of penetrating cavities should be ensured. Among them, the shielding body can be properly encapsulated to ensure its reliable function throughout its life.

[0048] In one embodiment of the present invention, the support structure 2 of the reactor bottom shield needs to be immersed in the water tank for a long time, and its strength should be strong enough and corrosion-resistant, and the material can be stainless steel, titanium alloy, etc.

[0049] The water tank 3 of the reactor bottom shield should be able to ensure that its water level is not lower than the design water level, and the range of the water tank should be not less than the projection area of ​​the primary shield on the double bottom. During the design and installation of the reactor bottom shield, the double bottom structural characteristics should be fully considered, and the installation route should be reasonably planned to ensure that each installation position is accessible.

[0050] In an embodiment of the present invention, a marine reactor bottom structure and a ship based on a water tank with a dual shielding function are provided, which are arranged in a double bottom structure below the reactor, and the water tank arranged in the double bottom structure below the reactor is also used as a shielding water tank, including: a shielding body, a supporting structure and a water tank. In the height direction, the upper end of the shielding body is close to the upper plate of the double bottom structure, and its lower end is partially immersed in the water tank; in the plane direction, the shape of the shielding body is a circular ring similar to the primary shield of the reactor bottom structure or a broken line designed with the frame-type double bottom structure; the shielding body, the primary shielding and the water tank constitute a closed shielding system, and the shielding body does not exceed the projection area of ​​the primary shielding on the double bottom structure; the water level of the water tank is not lower than its design water level, and the range of the water tank is not less than the projection area of ​​the primary shielding on the double bottom structure.

[0051] The technical solution of the present invention can solve the problem of neutrons and gamma rays at the bottom of the reactor in power ships and nuclear-powered floating platforms being backscattered to adjacent cabins through the seawater at the bottom of the ship and the double bottom structure, further causing the radiation field in the adjacent cabins of the reactor to seriously exceed the standard.

[0052] 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 reactor bottom structure based on a water tank with a shielding function, which is arranged in a double bottom structure below the reactor, and the water tank arranged in the double bottom structure below the reactor is also used as a shielding water tank, characterized in that: The ship bottom structure comprises: a shielding body (1), a supporting structure (2) and a water tank (3); In the height direction, the upper end of the shielding body (1) is in close contact with the upper plate of the double bottom structure, and the lower end thereof is partially immersed in the water tank (3); In the plane direction, the shielding body (1) has an outer shape similar to a primary shield of a pile bottom structure or a folded line shape designed with a frame-type double-layer bottom structure; The shielding body (1), the primary shielding and the water tank (3) form a closed shielding system, and the shielding body (1) does not exceed the projection area of ​​the primary shielding on the double bottom structure; The water level of the water tank (3) is not lower than its designed water level, and the range of the water tank (3) is not smaller than the projection area of ​​the primary shield on the double bottom structure.

2. A marine bottom structure based on a water tank with a dual shielding function according to claim 1, characterized in that: The shielding body (1) comprises one or more of polyethylene, boron-containing polyethylene, lead-boron polyethylene, boron aluminum, shielding putty, boron steel and steel plate.

3. A marine bottom structure based on a water tank with a shielding function according to claim 2, characterized in that: The shielding body (1) is installed in a layered stacking manner, wherein the shielding body (1) has a complete structure and has no through-going cavity.

4. A marine bottom structure based on a water tank with a shielding function according to claim 2, characterized in that: The shielding body (1) is installed in a casting-molding manner, wherein the shielding body (1) has a complete structure and has no through-going cavity.

5. The ship bottom structure based on the water tank with shielding function according to claim 2 is characterized in that: The support structure (2) is a corrosion-resistant high-strength material structure including at least stainless steel and titanium alloy.

6. A marine bottom structure based on a water tank with a dual shielding function according to claim 1, characterized in that: The lower end portion of the shielding body (1) is immersed in the water tank (3), and comprises: The depth to which the lower end portion of the shielding body (1) is immersed is determined according to at least the heel, pitch, roll and water usage conditions of the actual platform.

7. A marine pile bottom structure based on a water tank with a dual shielding function according to claim 2, characterized in that: The ship bottom structure comprises: Based on the structural characteristics of the double bottom structure, it is determined that the installation position of the marine bottom structure can be correctly installed.

8. A ship, characterized in that: The ship comprises a ship bottom structure based on a water tank and a shielding function as described in any one of claims 1 to 7.

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