Partition member, method for manufacturing a partition member, and method for designing a partition member

Abstract

The present invention provides a partition member capable of shielding radiation in a desired shape, a method for manufacturing the partition member, and a method for designing the partition member. [Solution] The radiation shielding frame 20 for shielding radiation comprises a frame 21 having the external shape of the radiation shielding frame 20 and an internal space 21s, and a fluid radiation shielding material 22 filled in the frame 21, the radiation shielding material 22 being sealed within the frame 21.

Description

Technical Field

[0001] The present disclosure relates to a partition member for a building, a method for manufacturing the partition member, and a method for designing the partition member. In particular, it relates to radiation protection furniture installed at the entrance of an X-ray examination room.

Background Art

[0002] In facilities that handle radiation (such as X-rays), like medical facilities, the structure is designed to prevent radiation from leaking to the outside. For example, shielding materials such as lead and concrete (lead plates, high-density concrete, etc.) for shielding radiation are appropriately incorporated into walls, ceilings, floors, etc. Also, furniture (doors, windows, etc.) uses special structures and materials to prevent radiation leakage. Further, due to its harmful nature, environmental impact, and difficulty in processing, there has been an increasing trend to refrain from using lead, which has been conventionally used as a radiation shielding material. Therefore, a radiation shielding door that does not use any lead and attenuates radiation leakage from the door and frame parts during normal use has been under consideration (for example, Patent Document 1). The radiation shielding door described in this Patent Document 1 has steel plates of a required thickness attached to both the front and back surfaces of a laminate formed by laminating at least two lead-free boards. And for the radiation shielding frames of at least the upper frame and the left and right vertical frame parts at the opening, steel plates of a required thickness are covered on a laminate formed by laminating at least two lead-free boards.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The technology described in Patent Document 1 can shield radiation. However, since lead-free boards are laminated, a thickness for shielding radiation is required. Also, in the case of off-the-shelf lead-free boards, the degree of freedom in shape is small. [Means for solving the problem]

[0005] A radiation shielding partition member that solves the above problems comprises a frame having the external shape of the partition member and an internal space, and a fluid radiation shielding material filled in the frame, wherein the radiation shielding material is sealed within the frame.

[0006] A method for manufacturing a partition member that shields against radiation to solve the above problems involves determining a fluid radiation shielding material according to the radiation source, filling the internal space of a frame having a thickness that allows the radiation source to be shielded by the radiation shielding material with the radiation shielding material, and then sealing the frame to manufacture a partition member in which the radiation shielding material is sealed.

[0007] A method for designing a partition member that shields against radiation to solve the above problems involves determining a fluid radiation shielding material, determining the thickness that can be shielded by the radiation shielding material according to the radiation source, and constructing a partition member that includes a frame having an internal space of at least the said thickness. [Effects of the Invention]

[0008] According to this disclosure, it is possible to provide a partition member that can shield radiation in a desired shape, a method for manufacturing the partition member, and a method for designing the partition member. [Brief explanation of the drawing]

[0009] [Figure 1] This is an explanatory diagram of a radiation shielding door in an embodiment. [Figure 2] This is a cross-sectional view of a radiation shielding door in an embodiment. [Figure 3] This is an explanatory diagram of a method for manufacturing a partition member in an embodiment, where (a) is an explanatory diagram of the preparation of the radiation shielding frame, (b) is an explanatory diagram of the filling, and (c) is an explanatory diagram of the sealing. [Modes for carrying out the invention]

[0010] Below, an embodiment illustrating a partition member, a method for manufacturing the partition member, and a method for designing the partition member will be described using Figures 1 to 3. In this embodiment, a component of a radiation room (radiation facility) will be used as the partition member. In a radiation room, for example, radiation sources for RI (radioisotope) testing can be used, such as ion sources, cyclotrons, nuclear reactions, radioactive decay, and chemical methods.

[0011] As shown in Figure 1, a radiation shielding door 10 equipped with a handle 10H is provided at the opening of the radiation room. This radiation shielding door 10 is rotatably attached to the wall 30 by hinges 20J of a radiation shielding frame 20 (a door frame as a partition member). The radiation shielding frame 20 consists of left and right vertical frames 20L, 20R and upper and lower horizontal frames 20U, 20D.

[0012] Figure 2 is a cross-sectional view of the door edge (vertical frame 20L side) of the radiation shielding door 10 of the radiation room. In Figure 2, the upper side is the radiation room side, and the lower side is the general room side. For example, a single-leaf door can be used as the radiation shielding door 10. This radiation shielding door 10 seals the radiation room by facing the radiation shielding frame 20 (vertical frame) at the door edge.

[0013] The radiation shielding door 10 consists of a panel supported by a steel frame 13. The panel consists of a lead-free board 12 laminated onto the surface material of a steel plate 11. The lead-free board 12 is a board manufactured from a lead-free shielding material (barium, bismuth, tungsten, boron carbide, polymer resin, etc.). The shielding material is uniformly dispersed using a base material such as gypsum, epoxy resin, or polyethylene, and then molded into a sheet or board, hardened, and surface-treated. Glass fibers may be mixed in as a reinforcing material for the base material.

[0014] The radiation shielding frame 20 is a convex-shaped frame 21 (frame body) having a door stop 20a in its cross-section. The internal space 21s enclosed by this frame 21 is filled with radiation shielding material 22. For example, high-strength cold-formed steel sheet is used for the frame 21. In this embodiment, in order to shield against gamma rays and X-rays, for example, a fluid powder such as barium sulfate is used as the radiation shielding material 22.

[0015] The radiation shielding frame 20 is connected to the wall 30 of the radiation room. This wall 30 is formed from laminated lead-free boards 31 and gypsum boards 32. The gypsum boards 32 are supported by the support portion 23 of the radiation shielding frame 20.

[0016] (Design and manufacturing methods for partition materials) Next, Figure 3 will be used to explain the design and manufacturing methods of the partition material. First, a radiation shielding frame 20 is prepared, as shown in Figure 3(a). Here, the material capable of shielding radiation (e.g., steel or composite material) is determined according to the type of radiation.

[0017] Next, steel plates are processed to form a frame of the desired shape. Here, a frame 21 having the outer shape of the radiation shielding frame 20 is formed. This frame 21 has an opening 21a at the top and a bottom 21b at the bottom.

[0018] The radiation shielding material 22 to be filled into the internal space 21s of the frame 21 of the radiation shielding frame 20 is determined. Here, a fluid material is used as the radiation shielding material 22. In this case, the arrangement of the internal space 21s and the material of the radiation shielding material 22 are determined so that, with respect to the direction of irradiation from the radiation source, the thickness of the radiation shielding material 22 when it is filled into the internal space 21s is sufficient to shield the radiation irradiated from the radiation source. Furthermore, it is preferable to determine the arrangement of the internal space 21s and the material of the radiation shielding material 22 including the radiation shielding effect of the thickness of the steel frame 21.

[0019] Next, as shown in FIG. 3(b), a radiation shielding material 22 having fluidity is filled. Specifically, the radiation shielding material 22 is filled into the internal space 21s from the opening 21a of the frame 21 so that no gap occurs. Then, as shown in FIG. 3(c), the radiation shielding material 22 is encapsulated. Specifically, the radiation shielding material 22 is sealed within the frame 21 by fixing the opening 21a with a lid member 21c.

[0020] (Operation of this embodiment) Since the radiation shielding material 22 is filled in the frame 21, the transmission of radiation is suppressed.

[0021] (Effect of this embodiment) (1) In this embodiment, powder such as barium sulfate is used as the radiation shielding material 22. Since lead is not used, environmental pollution and health hazards can be suppressed.

[0022] (2) In this embodiment, the frame 21 has an internal space 21s. By filling the radiation shielding material 22 into the internal space 21s, a radiation shielding member can be formed. (3) In this embodiment, the radiation shielding material 22 is filled in the frame 21. Thereby, radiation can be shielded. Different from lead-free boards of off-the-shelf products, by configuring the frame 21 in an arbitrary shape, a radiation shielding member of an arbitrary shape can be manufactured. For example, it is suitable for a furniture frame having a complicated shape. Also, by using the radiation shielding material 22 having fluidity, the internal space 21s of the frame 21 can be evenly filled. Since the radiation shielding material 22 does not require a base material for forming a shape by forming, atoms for shielding radiation can be densely filled. Therefore, the thickness required for shielding radiation can be reduced.

[0023] (4) In this embodiment, barium sulfate is used as the radiation shielding material 22. Since barium sulfate is an X-ray contrast agent in gastrointestinal imaging examinations, it is safe because it does not affect health.

[0024] This embodiment can be implemented with the following modifications. This embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically. • In the above embodiment, it was used in the radiation shielding frame 20, but it is not limited to building components as long as it is a partitioning member for shielding radiation. For example, it may be used in walls, ceilings, floors, furniture, partitions (simple type, movable type, panel type, screen type, etc.), partitions, outlet boxes, etc. In the above embodiment, a powder such as barium sulfate is used as the radiation shielding material 22. However, it is not limited to barium sulfate as long as it is a fluid material that can be filled into the frame. The radiation shielding material 22 should be determined according to the type of radiation that needs to be shielded. For example, for shielding neutron radiation, powders such as boric acid or boron carbide, which are boron compounds, polyethylene powder, graphite powder, water, and other liquids can be used.

[0025] In the above embodiment, a high-strength cold-formed steel sheet was used for the frame 21, but any material that can enclose the radiation shielding material 22 and maintain its shape is acceptable. In the above embodiment, the radiation shielding material 22 is filled into the internal space through the opening 21a of the frame 21. In this case, the frame 21 may be vibrated while filling the space using a vibrator or the like.

[0026] Next, the technical concepts that can be understood from the above embodiments and alternative examples are described below. (a) The partition member according to claim 1, characterized in that the frame is a wall material. (b) The partition member has an opening for filling with the radiation shielding material, The partition member according to claim 1, characterized in that it has a lid portion for sealing the radiation shielding material by closing the opening.

[0027] (c) The partition member according to claim 1, characterized in that the frame has an internal space of a thickness that can shield radiation when filled with radiation shielding material. [Explanation of symbols]

[0028] 10...Radiation shielding door, 11...Steel plate, 12...Lead-free board, 20...Radiation shielding frame, 20L, 20R...Vertical frame, 20U, 20D...Horizontal frame, 21...Frame, 21s...Interior space, 22...Radiation shielding material, 30...Wall, 31...Lead-free board, 32...Gypsum board.

Claims

1. A partition member for shielding against radiation, A frame having the external shape of the partition member and an internal space, The frame comprises a fluid radiation shielding material filled within the frame, The partition member is characterized in that the radiation shielding material is enclosed within the frame.

2. The partition member according to claim 1, characterized in that the radiation shielding material is barium sulfate.

3. The partition member according to claim 1 or 2, characterized in that the frame is a building component.

4. A method for manufacturing a partition member that shields against radiation, Depending on the radiation source, a fluid radiation shielding material is determined. The radiation shielding material is filled into the internal space of the frame, which has a thickness that allows it to shield the radiation source. A manufacturing method characterized by manufacturing a partition member in which the radiation shielding material is sealed by sealing the frame.

5. A method for designing a partition member that shields against radiation, Depending on the radiation source, a fluid radiation shielding material is determined. Depending on the radiation from the radiation source, the thickness that can be shielded by the radiation shielding material is determined. A design method characterized by constructing a partition member that includes a frame having an internal space of at least the aforementioned thickness.

Images