Shielding protection body for nuclear radiation environment

Abstract

A shielding protection body for a nuclear radiation environment comprises special-shaped shielding bricks, double-cross-shaped grooves are formed in the upper end faces of the special-shaped shielding bricks, double-cross-shaped bosses are arranged on the lower end faces of the special-shaped shielding bricks, and the double-cross-shaped boss on the lower end face of each special-shaped shielding brick is matched with the double-cross-shaped groove of the special-shaped shielding brick located below the double-cross-shaped boss. The double-cross-shaped groove in the upper end face of each special-shaped shielding brick is matched with the double-cross-shaped boss of the special-shaped shielding brick located above the double-cross-shaped groove. According to the utility model, the potential safety hazard problem that the shielding body topples over is fully reduced, and the structural form is also convenient to construct, dismantle and reuse. In addition, the materials of the shielding brick can be reasonably selected from lead, cast iron, carbon steel, boron-containing polyethylene, lead boron polyethylene and the like according to the types of shielding rays.

Description

Technical Field

[0001] This patent relates to the field of nuclear radiation protection technology, specifically to a shielding and protective body for use in nuclear radiation environments. Background Technology

[0002] Radiation protection is the fundamental guarantee for the safe operation of nuclear facilities and the safe operation of personnel. In accordance with the relevant provisions of the Basic Standards for Ionizing Radiation Protection and Radiation Source Safety (GB 18871-2002), the occupational exposure level of workers (including operators, maintenance personnel, etc.) should be strictly controlled to ensure that it does not exceed the limits stipulated by national laws and regulations and standards. Nuclear facilities have multiple radiation protection zones, and the production process involves numerous radioactive liquid tanks, pipelines, and other equipment and facilities. The on-site radiation source environment is extremely complex, and leaks and other abnormal malfunctions are inevitable during operation. This can lead to radioactive hotspots (radiation sources) or localized areas with dose exceeding limits, the exact location of which is uncertain and the occurrence of malfunctions is sporadic. When such malfunctions occur, the radiation dose level at the malfunction point may be far higher than the radiation protection control requirements of the area (white zone: ≤2.5μSv / h, green zone: ≤5μSv / h, orange zone: ≤25μSv / h). Without corresponding protective measures, this problem will cause on-site operators, maintenance personnel, and technicians to suffer unnecessary additional radiation doses, posing a significant safety hazard. Therefore, to ensure the radiation safety of personnel and minimize external radiation hazards, it is necessary to prepare and temporarily add areas with additional shielding or compensating shielding facilities during production operations. According to research, ordinary lead bricks are currently commonly used to construct shielding walls as temporary shielding facilities for radioactive hotspots. However, the surface of ordinary lead bricks is mostly planar. Due to processing errors or surface cleanliness issues (such as the presence of fine particles), straight seams exist between the hot and cold ends, creating overlapping gaps between adjacent lead bricks and resulting in localized weakening of the shielding's protective performance. Actual on-site measurements showed that the gamma dose rate at the seams exceeded the dose protection standard for the corresponding area, with the dose at the straight seams exceeding that of other areas by several times, failing to meet environmental dose protection requirements and posing significant radiation safety defects and risks. Therefore, shielding facilities should fully consider and avoid the existence of straight seams, and it is urgent to address the weak radiation protection defects at the junctions of adjacent shielding structures. Furthermore, existing ordinary lead bricks are basically all the same size and shape (e.g., 200×100×50mm cuboids), and they are stacked together. Adjacent lead bricks are simply attached together, and the structure is rather scattered, resulting in poor overall structural stability. If the shielding structure is tall, there is a high risk of it collapsing. In conclusion, temporary shielding wall facilities using ordinary lead bricks do not fully meet the principle of "optimization of protection and safety" in radiation protection requirements.

[0003] Existing technologies still have the problem of straight seams in the sealing and shielding between the hot and cold ends, and have not eliminated the radiation safety risk caused by the straight seams between the shielding bricks weakening the radiation shielding ability at the joint. Summary of the Invention

[0004] The purpose of this invention is to provide a shielding protection body for nuclear radiation environments, which effectively solves the safety hazards of straight seams in the use of ordinary shielding bricks as temporary shielding walls, and at the same time solves the stability and sealing problems caused by the stacking method of the shielding bricks themselves.

[0005] The technical solution of the present invention is as follows: a shielding body for nuclear radiation environment, comprising irregularly shaped shielding bricks, the upper end face of the irregularly shaped shielding bricks having a double cross-shaped groove and the lower end face having a double cross-shaped protrusion, wherein the double cross-shaped protrusion on the lower end face of each irregularly shaped shielding brick matches the double cross-shaped groove of the irregularly shaped shielding brick located below it, and the double cross-shaped groove on the upper end face of each irregularly shaped shielding brick matches the double cross-shaped protrusion of the irregularly shaped shielding brick located above it;

[0006] The irregular shielding brick has a V-shaped funnel-shaped protrusion on one side and a V-shaped funnel-shaped groove on the other side; and the V-shaped funnel-shaped protrusion 3 on the right end of each irregular shielding brick matches the V-shaped funnel-shaped groove on the left end of the irregular shielding brick located to its right.

[0007] The double-cross groove consists of two single-cross symmetrically distributed grooves. The grooves are wider at the top and narrower at the bottom, and the cross-section is an isosceles trapezoid.

[0008] The groove in the length direction is deeper than the groove in the width direction.

[0009] The double-cross boss consists of two single-cross symmetrically distributed bosses that match the double-cross grooves.

[0010] The right end of the double cross-shaped groove of the irregular shielding brick and the right end of the double cross-shaped boss of the irregular shielding brick located above the irregular shielding brick match the middle gap of the V-shaped funnel-shaped boss on the side of the irregular shielding brick; the left end of the double cross-shaped groove of the irregular shielding brick and the left end of the double cross-shaped boss of the irregular shielding brick located above the irregular shielding brick are located at the center of the V-shaped funnel-shaped groove on the left side of the irregular shielding brick.

[0011] The irregularly shaped shielding brick located at the top layer of the shielding structure used in nuclear radiation environments does not have a double cross groove at the top.

[0012] The irregularly shaped shielding brick located at the bottom layer of the shielding structure used in nuclear radiation environments does not have a double cross protrusion at the bottom.

[0013] The materials for irregularly shaped shielding bricks are lead, cast iron, carbon steel, boron-containing polyethylene, or lead-boron polyethylene.

[0014] The significant advantages of this invention are as follows: the upper part of the shielding brick adopts a "double cross" groove, the lower part adopts a "double cross" boss, and the left and right end faces adopt irregular (funnel-shaped) grooves and bosses. Furthermore, the bricks are assembled using a staggered interlocking structure, thus completely eliminating the straight-through seam problem formed by stacking ordinary shielding bricks. This effectively ensures the full-range shielding capability of the temporary shielding body, thereby solving the radiation safety problem for workers. Simultaneously, the staggered interlocking assembly method of the base bricks, main bricks, and top bricks significantly improves the overall stability and compactness of the shielding device, greatly reducing the safety hazard of the shielding body tipping over. The structural design also facilitates assembly, disassembly, and reuse. In addition, the shielding brick material can be rationally selected according to the type of radiation being shielded, including lead, cast iron, carbon steel, boron-containing polyethylene, and lead-boron polyethylene. Attached Figure Description

[0015] Figure 1 A schematic diagram of the mating of a double-cross-shaped boss and a recessed platform for use in nuclear radiation environments;

[0016] Figure 2 Top view of the double cross-shaped groove;

[0017] Figure 3 A schematic diagram of the funnel-shaped protrusion on the side of an irregularly shaped shielding brick;

[0018] Figure 4 A schematic diagram of the funnel-shaped groove on the side of an irregularly shaped shielding brick;

[0019] In the diagram: 1. Double cross-shaped groove; 2. Double cross-shaped boss; 3. V-shaped funnel-shaped boss; 4. V-shaped funnel-shaped groove; 5. Middle gap of V-shaped funnel-shaped boss 3; 6. Center position of V-shaped funnel-shaped groove 4. Detailed Implementation

[0020] Many specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below.

[0021] The terminology used in one or more embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of one or more embodiments of this application. The singular forms “a,” “the,” and “the” used in one or more embodiments of this application and in the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” used in one or more embodiments of this application refers to and includes any or all possible combinations of one or more associated listed items.

[0022] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this application, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this application, and similarly, second may also be referred to as first.

[0023] The present patent will now be further described with reference to the accompanying drawings;

[0024] A shielding enclosure for use in nuclear radiation environments includes irregularly shaped shielding bricks, such as... Figure 1 , 2 As shown, the upper surface of the irregular shielding brick has a double cross-shaped groove 1, and the lower surface has a double cross-shaped protrusion 2. The double cross-shaped protrusion 2 on the lower surface of each irregular shielding brick matches the double cross-shaped groove 1 of the irregular shielding brick below it, and the double cross-shaped groove 1 on the upper surface of each irregular shielding brick matches the double cross-shaped protrusion 2 of the irregular shielding brick above it. This makes all the irregular shielding bricks in the shielding protection body used for nuclear radiation environment have a structure in which the upper and lower surfaces are interlocked.

[0025] The double-cross groove 1 consists of two symmetrically distributed single-cross axes. The groove is wider at the top and narrower at the bottom, with an isosceles trapezoidal cross-section to facilitate guidance and rapid assembly. The depth is 5mm, and the groove is deeper in length than in width.

[0026] The double cross-shaped boss 2 is symmetrically distributed by two single cross axes and matches the double cross-shaped groove 1. Its thickness on the long side is thicker than the thickness of the boss in the width direction.

[0027] like Figure 3 , 4 As shown, the irregular shielding brick has a V-shaped funnel-shaped protrusion 3 on one side and a V-shaped funnel-shaped groove 4 on the other side; and the V-shaped funnel-shaped protrusion 3 on the right end of each irregular shielding brick matches the V-shaped funnel-shaped groove 4 on the left end of the irregular shielding brick located to its right (the above left and right are just examples and can be interchanged).

[0028] like Figure 2 As shown, the right end of the double-cross groove 1 of the irregular-shaped shielding brick, and the right end of the double-cross protrusion 2 of the irregular-shaped shielding brick located above it, match the middle gap 5 of the V-shaped funnel protrusion 3 on the side of the irregular-shaped shielding brick; the left end of the double-cross groove 1 of the irregular-shaped shielding brick, and the left end of the double-cross protrusion 2 of the irregular-shaped shielding brick located above it, are located at the center position 6 of the V-shaped funnel groove 4 on the left side of the irregular-shaped shielding brick; this result makes all the irregular-shaped shielding bricks in the shielding protection body used for nuclear radiation environment interlock in pairs in the left and right directions. (The left and right sides above are examples and can be interchanged.)

[0029] The irregularly shaped shielding brick located at the top layer of the shielding and protective body for nuclear radiation environment does not have a double cross-shaped groove 1 at the top; while the irregularly shaped shielding brick located at the bottom layer of the shielding and protective body for nuclear radiation environment does not have a double cross-shaped protrusion 2 at the bottom.

[0030] The above description is merely a preferred embodiment of this patent and is not intended to limit this patent. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this patent shall be included within the scope of protection of this patent.

[0031] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0032] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0033] The preferred embodiments disclosed above are merely illustrative of this application. The optional embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this application. These embodiments are selected and specifically described in this application to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to better understand and utilize this application.

Claims

1. A shielded enclosure for a nuclear radiation environment, characterized by: The special-shaped shielding brick has a double-cross groove (1) on its upper end face and a double-cross boss (2) on its lower end face, and the double-cross boss (2) on the lower end face of each special-shaped shielding brick matches the double-cross groove (1) of the special-shaped shielding brick located below it, and the double-cross groove (1) on the upper end face of each special-shaped shielding brick matches the double-cross boss (2) of the special-shaped shielding brick located above it. The special-shaped shielding brick has a V-shaped funnel boss (3) on one side face and a V-shaped funnel groove (4) on the other side face, and the V-shaped funnel boss (3) on the right end face of each special-shaped shielding brick matches the V-shaped funnel groove (4) on the left end face of the special-shaped shielding brick located to the right of it.

2. A shield according to claim 1, wherein: The double-cross groove (1) comprises two single-cross grooves which are symmetrically distributed along the axis and have a trapezoidal cross section with the upper part being wider than the lower part.

3. A shield for a nuclear radiation environment according to claim 2, wherein: In the double-cross groove (1), the groove in the length direction is wider than the groove in the width direction.

4. A shield according to claim 3, wherein: The double-cross boss (2) comprises two single-cross bosses which are symmetrically distributed along the axis and match the double-cross groove (1).

5. A shield for a nuclear radiation environment according to claim 1, wherein: The right end of the double-cross groove (1) of the special-shaped shielding brick and the right end of the double-cross boss (2) of the special-shaped shielding brick located above the special-shaped shielding brick match the middle gap (5) of the V-shaped funnel boss (3) on the side face of the special-shaped shielding brick, and the left end of the double-cross groove (1) of the special-shaped shielding brick and the left end of the double-cross boss (2) of the special-shaped shielding brick located above the special-shaped shielding brick are located at the center position (6) of the V-shaped funnel groove (4) on the left side of the special-shaped shielding brick.

6. A shield for a nuclear radiation environment according to claim 1, wherein: The special-shaped shielding brick located at the top layer of the shielding body for nuclear radiation environment has no double-cross groove (1) on its upper end face.

7. A shield for a nuclear radiation environment according to claim 6, characterized in that: The special-shaped shielding brick located at the bottom layer of the shielding body for nuclear radiation environment has no double-cross boss (2) on its lower end face.

8. A shield for a nuclear radiation environment according to claim 1, wherein: The special-shaped shielding brick is made of lead, cast iron, carbon steel, boron-containing polyethylene or lead-boron polyethylene.

Images