Modularized radiation shielding door of nuclear reactor

Abstract

The utility model provides a modularized radiation shielding door of a nuclear reactor. A modularized radiation shielding door of a nuclear reactor comprises an outer frame, a cavity is formed in the outer frame, a modularized shielding structure is installed in the cavity, the modularized shielding structure comprises a boron-containing stainless steel frame and a plurality of shielding blocks, the boron-containing stainless steel frame is provided with containing cavities arranged in a honeycomb shape, and the shielding blocks are arranged in the containing cavities. And the shielding block is detachably mounted in the accommodating cavity. The utility model has the advantages that different shielding blocks can be respectively arranged at different parts, and the shielding effect on alpha rays, gamma rays, X rays and neutrons is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of radiation shielding at the entrances and exits of high-radiation areas in nuclear power plants, and particularly to a modular radiation shielding door for a nuclear reactor. Background Art

[0002] Nuclear reactors and radioactive waste disposal areas have extremely strong radioactivity and a certain neutron emission rate. To prevent the harm caused by radioactive leakage to personnel and the environment, the entrances and exits of these areas need to be protected by shielding doors. Currently, the radiation shielding materials used for foreign shielding doors are mainly boron-containing steel, boron-aluminum alloy, B4C / Al composite material, cadmium-gadolinium neutron absorption material, organic polymer, lead, etc.

[0003] Currently, the common radiation shielding door structures at home and abroad are mainly as follows: the frame is made of Q235B steel, and the interior is made of boron-containing polyethylene, lead-boron polyethylene, lead alloy, etc. During the production, installation, and use processes, the following disadvantages exist: 1. The production and installation of large-area shielding materials are extremely difficult and costly; 2. Since the internal shielding layer of conventional shielding doors has the same design, it is impossible to conduct targeted radiation shielding design for different parts of the shielding door. For example, the central part of the door is mainly for X-ray shielding, and the four corners of the door are mainly for neutron shielding; 3. With the continuous extension of the operating life of nuclear power plants, the service life of the radiation shielding materials in conventional radiation shielding doors can no longer meet the use requirements. At this time, the entire shielding door needs to be replaced, resulting in huge costs. Summary of the Invention

[0004] The purpose of the present utility model is to address the above problems existing in the prior art and propose a modular radiation shielding door for a nuclear reactor, which has the characteristics of being able to install different shielding blocks at different parts respectively to enhance the shielding effects against α, γ, X-rays, and neutrons.

[0005] The purpose of the present utility model can be achieved by the following technical solutions:

[0006] A modular radiation shielding door for a nuclear reactor, comprising: an outer frame, a chamber is provided inside the outer frame, a modular shielding structure is installed in the chamber, the modular shielding structure includes a boron-containing stainless steel frame and several shielding blocks with different functions, the boron-containing stainless steel frame has accommodation cavities arranged in a honeycomb shape, and the shielding blocks are detachably installed in the accommodation cavities.

[0007] In the above-mentioned modular radiation shielding door for a nuclear reactor, the outer frame is made of Q235B structural steel.

[0008] In the above-mentioned modular radiation shielding door for a nuclear reactor, the shielding blocks are in the shape of hexagonal prisms.

[0009] In the modular radiation shielding door of the above nuclear reactor, the shielding block is any one of a tungsten alloy shielding block, a tungsten resin shielding block, a boron-containing polyethylene shielding block, and a B 4 C ceramic shielding block.

[0010] In the modular radiation shielding door of the above nuclear reactor, the shielding frame is detachably arranged in the accommodating cavity.

[0011] In the modular radiation shielding door of the above nuclear reactor, the shielding block is in a tight fit with the accommodating cavity.

[0012] Compared with the prior art, the present application has the following advantages:

[0013] In the present application, the modular shielding structure of the shielding door is composed of a boron-containing stainless steel frame and a number of shielding blocks, and the shielding blocks can be independently disassembled and replaced. This design simplifies the installation and maintenance process, reduces the replacement cost. Since the shielding material can be arranged as required, unnecessary material waste is reduced, effectively reducing the manufacturing cost of the shielding door. At the same time, when replacing, only the aged or damaged shielding blocks need to be replaced, rather than the entire shielding door, thus further saving costs. The modular structure makes maintenance more convenient and safe. When problems occur, only the specific module needs to be processed, without having to disassemble the entire door body, which greatly shortens the maintenance time. Description of the Drawings

[0014] Figure 1 is a sectional view structure diagram of the present utility model.

[0015] In the figure,

[0016] 2. Outer frame;

[0017] 3. Modular shielding structure; 31. Boron-containing stainless steel frame; 32. Shielding block. Detailed Embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0019] As Figure 1 shown, a modular radiation shielding door of a nuclear reactor includes: an outer frame 2, a chamber is provided inside the outer frame 2, a modular shielding structure 3 is installed inside the chamber, the modular shielding structure 3 includes a boron-containing stainless steel frame 31 and a number of shielding blocks 32, the boron-containing stainless steel frame 31 has accommodating cavities arranged in a honeycomb shape, and the shielding blocks 32 are detachably installed in the accommodating cavities.

[0020] In this application, the modular shielding structure 3 of the shielding door is composed of a boron-containing stainless steel frame 31 and a number of shielding blocks 32, and the shielding blocks 32 can be independently disassembled and replaced. This design simplifies the installation and maintenance processes, reduces the replacement cost. Since the shielding materials can be arranged as needed, unnecessary material waste is reduced, effectively lowering the manufacturing cost of the shielding door. At the same time, when replacing, only the aged or damaged shielding blocks 32 need to be replaced, rather than the entire shielding door, thus further saving costs. The modular structure makes maintenance more convenient and safe. When problems occur, only the specific module needs to be processed, without having to disassemble the entire door body, which greatly shortens the maintenance time.

[0021] Shielding blocks 32 with different functions can be installed to achieve the installation of shielding blocks 32 according to actual situations.

[0022] The boron-containing stainless steel frame 31 can effectively shield neutrons and γ-rays with relatively large doses.

[0023] Specifically, the outer frame 2 is made of Q235B structural steel. Q235B structural steel has relatively high strength and load-bearing capacity, can provide a solid structural support, and ensure the overall stability and durability of the shielding door. Q235B is a commonly used carbon structural steel material, with rich resources and relatively low prices, which helps to reduce the manufacturing cost of the shielding door and ensure the sustainable supply of materials at the same time.

[0024] Specifically, the shielding block 32 is in the shape of a hexagonal prism. The shielding blocks 32 in the shape of hexagonal prisms can be closely arranged, similar to a honeycomb structure. Such a design can minimize the gaps between the shielding blocks 32, improve the space utilization efficiency of the materials, and thus enhance the shielding effect. The hexagonal prism shape naturally has relatively high structural stability. When multiple hexagonal prism-shaped shielding blocks 32 are arranged together, a stable overall structure can be formed.

[0025] Specifically, the shielding block 32 is any one of a tungsten alloy shielding block 32, a tungsten resin shielding block 32, a boron-containing polyethylene shielding block 32, and a B4C ceramic shielding block 32.

[0026] On the basis of meeting the radiation shielding requirements, the convenience of installation, replacement, repair of the shielding door is greatly increased, and hexagonal prism shielding blocks 32 filled with different shielding materials are installed in different parts to achieve personalized combination of the radiation shielding performance of different parts of the shielding door, and the shielding effects against α, γ, X-rays and neutrons are strengthened respectively in different parts.

[0027] Specifically, the shielding frame is pluggably arranged in the accommodating cavity.

[0028] The pluggable design allows for flexible adjustment of the shielding material and layout according to different radiation shielding requirements. For example, different types of shielding blocks 32 can be installed at different positions to optimize the shielding effect against specific types of radiation. The pluggable design enables the mutual replacement of different types of shielding materials, providing a high degree of compatibility and diversity, and can adapt to different radiation environments and safety standards.

[0029] Specifically, the shielding block 32 is in a too-tight fit with the accommodating cavity.

[0030] The too-tight fit ensures that the shielding block 32 will not easily loosen or move within the accommodating cavity, especially during the opening and closing operations of the shielding door or when subjected to external impacts, maintaining the stability of the shielding material. The tight fit reduces the gaps between the shielding block 32 and the accommodating cavity, preventing radiation from leaking through these gaps. Especially when protecting against high-energy rays, the tight arrangement of the shielding material helps to enhance the overall shielding effect.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If this specific posture changes, then the directional indication will also change accordingly.

[0032] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. At the same time, the meaning of "and / or" appearing throughout the text is that it includes three scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The above components are all common standard components or components known to those skilled in the art, and their structures and principles can all be learned by those skilled in the art through technical manuals or by conventional experimental methods.

[0034] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art of the present utility model can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A modular radiation shielding door for a nuclear reactor, characterized in that: include: An outer frame (2), wherein the outer frame (2) has a chamber, wherein a modular shielding structure (3) is installed in the chamber, wherein the modular shielding structure (3) comprises a boron-containing stainless steel frame (31) and a plurality of shielding blocks (32), wherein the boron-containing stainless steel frame (31) has a receiving chamber arranged in a honeycomb shape, and the shielding block (32) is detachably installed in the receiving chamber.

2. The modular radiation shielding door for a nuclear reactor according to claim 1, characterized in that: The outer frame (2) is made of Q235B structural steel.

3. The modular radiation shielding door for a nuclear reactor according to claim 1, characterized in that: The shielding block (32) is in the shape of a hexagonal prism.

4. The modular radiation shielding door for a nuclear reactor according to claim 3, characterized in that: The shielding block (32) is any one of a tungsten alloy shielding block (32), a tungsten resin shielding block (32), a boron-containing polyethylene shielding block (32), and a B4C ceramic shielding block (32).

5. The modular radiation shielding door for a nuclear reactor according to claim 4, characterized in that: The shielding frame is pluggable and disposed in the accommodating cavity.

6. The modular radiation shielding door for a nuclear reactor according to claim 5, characterized in that: The shielding block (32) is too tightly fitted into the accommodating cavity.

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