Radiation-proof wall body system of X-ray electron accelerator for irradiation

Abstract

The invention provides an anti-radiation wall system of an X-ray electron accelerator for irradiation, which comprises a host room, an irradiation room, a lower channel, an upper channel, a control room, a radiation monitoring device, a feeding warehouse, a receiving warehouse and an external supply equipment area, one end of an irradiation accelerator enters the irradiation room through a horn mouth output end, and a wire harness enters the upper channel through an output end of the irradiation room; a wire harness at the other end of the irradiation accelerator in the host room is output to the lower channel through the host room, the irradiation room, the lower channel and the upper channel are all unmanned when the irradiation accelerator operates normally, and the wire harness emitted by the irradiation accelerator is effectively refracted, dispersed and isolated through the isolation main wall, the lower channel and the upper channel, so that the wire harness of the irradiation accelerator is prevented from leaking. The overall safety of the caisson channel is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building protection, and more specifically to a radiation-proof wall system of an X-ray electron accelerator for irradiation. Background Art

[0002] In recent years, the demand for irradiation of medical and health materials, medicines, various foods and condiments has increased significantly. Therefore, industrial irradiation rooms are needed for irradiation sterilization of medical and health materials, medicines, various foods and condiments.

[0003] Existing irradiation sterilization mostly uses an inner lining protective wall inside the workshop to provide radiation protection. The inner lining protective wall is mostly made of spliced ​​lead plates. The joints have seams that cannot effectively isolate the radiation source, causing damage to personnel and the environment, and it is impossible to monitor the radiation amount more efficiently.

[0004] In view of this, the present invention provides a radiation-proof wall system for an X-ray electron accelerator for irradiation, which is effectively isolated and simple in structure. Summary of the invention

[0005] The purpose of the present invention is to provide an effective isolated and simple structure radiation protection wall system for an X-ray electron accelerator for irradiation.

[0006] A radiation-proof wall system for an X-ray electron accelerator for irradiation comprises a mainframe room 1, an irradiation room 2, a lower maze 3, an upper maze 4, a control room 5, a radiation monitoring device, a feeding warehouse 6, a receiving warehouse 7, and an external supply equipment area 8, wherein the system is characterized in that an upper maze 4 and a lower maze 3 are arranged on the sides of the upper maze 4 and the control room 5 from top to bottom, an external supply equipment area 8 is arranged below the mainframe room 1, the mainframe room 1, the irradiation room 2, the lower maze 3, the upper maze 4, and the control room 5 are divided by a concrete wall 9, an irradiation accelerator 10 is arranged in the mainframe room 1, a trumpet is arranged at the output end of the irradiation accelerator 10, an isolation main wall 11 is arranged in the irradiation room 2, and the isolation main wall 11 It is used to isolate and absorb heat. One end of the irradiation accelerator 10 is output to the irradiation chamber 2 through the bell-mouth output end, and the wiring harness enters the upper maze 4 via the output end of the irradiation chamber 2. The wiring harness at the other end of the irradiation accelerator 10 in the main engine room 1 is output to the lower maze 3 through the main engine room 1. The main engine room 1, irradiation chamber 2, lower maze 3, upper maze 4, and control room 5 are all equipped with radiation monitoring devices. The radiation monitoring devices are used to monitor the radiation amounts at various points in the main engine room 1, irradiation chamber 2, lower maze 3, upper maze 4, and control room 5. The radiation monitoring devices are electrically connected to the control room 5. The control room 5 is used to control the main engine room 1 and monitor the radiation amounts in the main engine room 1, irradiation chamber 2, lower maze 3, and upper maze 4 in real time.

[0007] Furthermore, a serpentine water cooling coil 12 is provided in the isolation main wall 11 for absorbing the heat generated by the irradiation accelerator 10 and cooling the isolation main wall 11 .

[0008] Furthermore, when the monitoring data of the radiation monitoring devices in the main engine room 1, the irradiation room 2, the lower maze 3, and the upper maze 4 exceed the radiation setting value, the control room 5 sends out an alarm signal in an abnormal situation. The alarm signals include level one alarm, level two alarm, level three alarm, and level four alarm. The level one alarm is to immediately cut off the operation of the irradiation accelerator 10 in the control room 5. After the radiation monitoring devices at each radiation point detect that the radiation amount meets the standard, personnel enter the main engine room 1 to repair the irradiation accelerator 10. The level two alarm is to immediately cut off the operation of the irradiation accelerator 10 in the control room 5, increase the cold water supply and circulation of the serpentine water cooling coil 12, and operate again after the serpentine water cooling coil 12 cools to the set standard value. The level three alarm is to immediately cut off the operation of the irradiation accelerator 10 in the control room 5, and simultaneously cut off the operation of the feeding warehouse 6. The level four alarm is to immediately cut off the operation of the irradiation accelerator 10 in the control room 5, cut off the operation of the feeding warehouse 6, and at the same time announce the evacuation of personnel.

[0009] In some embodiments, a cut corner 13 is provided at both ends of the main isolation wall 11 near the bell mouth to provide refraction for the radiation beam output by the irradiation accelerator 10. The cut corner 13 at the right end forms a triangular refraction area 14 with the concrete wall 9 on the right side of the irradiation chamber 2, so that the radiation beam output by the irradiation accelerator 10 is always in the triangular refraction area 14 after it hits the cut corner 13 at the right end until it attenuates and disappears.

[0010] Furthermore, the cutting angle 13 is 45°.

[0011] In some embodiments, the vertical center line of the isolation main wall 11 is located at one third of the irradiation chamber 2 from bottom to top.

[0012] In some embodiments, the concrete wall 9 at the thickness connection between the upper maze 4 and the irradiation chamber 2, and the wall connecting the upper maze 4 with the feeding warehouse 6 and the receiving warehouse 7 are provided with a retaining wall 15, which is used for secondary shielding of the beam particles and refracting them back into the upper maze 4.

[0013] In some embodiments, the upper labyrinth 4 is an L-shaped labyrinth.

[0014] In some embodiments, the retaining wall 15 is made of concrete or brick wall material, preferably concrete.

[0015] In some embodiments, the left and right ends of the main isolation wall 11 away from the irradiation accelerator 10 are further provided with protrusions 16, and the protrusions 16 are used to provide refraction parts for the beam particles.

[0016] Beneficial effects of the present invention: The present invention proposes a radiation-proof wall system for an X-ray electron accelerator for irradiation, comprising a main engine room 1, an irradiation room 2, a lower maze 3, an upper maze 4, a control room 5, a radiation monitoring device, a feeding warehouse 6, a receiving warehouse 7, and an external supply equipment area 8. One end of the irradiation accelerator 10 is output to the irradiation room 2 through a bell-mouth output end, and the wire harness enters the upper maze 4 via the output end of the irradiation room 2. The wire harness at the other end of the irradiation accelerator 10 in the main engine room 1 is output to the lower maze 3 through the main engine room 1. When the irradiation accelerator 10 is operating normally, there is no one in the irradiation room 2, the lower maze 3, and the upper maze 4. The wire harness emitted by the irradiation accelerator 10 is effectively refracted and dispersed through the isolation main wall 11, the lower maze 3, and the upper maze 4, and is effectively isolated to prevent the wire harness of the irradiation accelerator 10 from leaking, thereby improving the overall safety of the maze. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a top view schematic diagram of a radiation protection wall system of an X-ray electron accelerator for irradiation in the present application.

[0018] Figure 2 This is a top view of a partially enlarged schematic diagram of a radiation protection wall system of an X-ray electron accelerator for irradiation of the present application.

[0019] Figure 3 A schematic diagram of the beam particle scattering path of a radiation protection wall system of an X-ray electron accelerator for irradiation in the present application.

[0020] Figure 4 This is a partially enlarged schematic diagram of the beam particle scattering path of a radiation protection wall system of an X-ray electron accelerator for irradiation in the present application.

[0021] Figure 5 This is a cross-sectional view of a radiation-proof wall system of an X-ray electron accelerator for irradiation in the present application.

[0022] Description of main component symbols:

[0023] Main machine room 1, irradiation room 2, lower maze 3, upper maze 4, control room 5, feeding warehouse 6, receiving warehouse 7, external supply equipment area 8, concrete wall 9, irradiation accelerator 10, isolation main wall 11, serpentine water cooling coil 12, cut corner 13, triangular refraction area 14, retaining wall 15, and protrusion 16.

[0024] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0025] The following examples are described to assist the understanding of the present application, and the examples are not and should not be interpreted in any way as limiting the scope of protection of the present application.

[0026] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or may be integrated together (including within a single system or component).

[0027] At the same time, the connections between components or systems are not intended to be limited to direct connections, rather, the data between these components may be modified, reformatted, or otherwise changed by intermediate components. In addition, additional or fewer connections may be used. It should also be noted that the terms "coupled," "connected," or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections.

[0028] Embodiment 1:

[0029] like Figure 1 As shown, it is a top view schematic diagram of a radiation protection wall system of an X-ray electron accelerator for irradiation of the present application; Figure 2 As shown, it is a top view of a partially enlarged schematic diagram of a radiation protection wall system of an X-ray electron accelerator for irradiation of the present application; Figure 3 As shown, it is a schematic diagram of the beam particle scattering path of a radiation protection wall system of an irradiation X-ray electron accelerator of the present application; Figure 4 As shown, it is a partial enlarged schematic diagram of the beam particle scattering path of a radiation protection wall system of an irradiation X-ray electron accelerator of the present application; Figure 5 Shown is a cross-sectional view of a radiation protection wall system of an X-ray electron accelerator for irradiation of the present application.

[0030] A radiation-proof wall system for an X-ray electron accelerator for irradiation comprises a mainframe room 1, an irradiation room 2, a lower maze 3, an upper maze 4, a control room 5, a radiation monitoring device, a feeding warehouse 6, a receiving warehouse 7, and an external supply equipment area 8, wherein the system is characterized in that an upper maze 4 and a lower maze 3 are arranged on the sides of the upper maze 4 and the control room 5 from top to bottom, an external supply equipment area 8 is arranged below the mainframe room 1, the mainframe room 1, the irradiation room 2, the lower maze 3, the upper maze 4, and the control room 5 are divided by a concrete wall 9, an irradiation accelerator 10 is arranged in the mainframe room 1, a trumpet is arranged at the output end of the irradiation accelerator 10, an isolation main wall 11 is arranged in the irradiation room 2, and the isolation main wall 11 It is used to isolate and absorb heat. One end of the irradiation accelerator 10 is output to the irradiation chamber 2 through the bell-mouth output end, and the wiring harness enters the upper maze 4 via the output end of the irradiation chamber 2. The wiring harness at the other end of the irradiation accelerator 10 in the main engine room 1 is output to the lower maze 3 through the main engine room 1. The main engine room 1, irradiation chamber 2, lower maze 3, upper maze 4, and control room 5 are all equipped with radiation monitoring devices. The radiation monitoring devices are used to monitor the radiation amounts at various points in the main engine room 1, irradiation chamber 2, lower maze 3, upper maze 4, and control room 5. The radiation monitoring devices are electrically connected to the control room 5. The control room 5 is used to control the main engine room 1 and monitor the radiation amounts in the main engine room 1, irradiation chamber 2, lower maze 3, and upper maze 4 in real time.

[0031] Furthermore, a serpentine water cooling coil 12 is provided in the isolation main wall 11 for absorbing the heat generated by the irradiation accelerator 10 and cooling the isolation main wall 11 .

[0032] When the monitoring data of the radiation monitoring devices in the main engine room 1, irradiation room 2, lower maze 3, and upper maze 4 exceed the radiation set value, the control room 5 sends out an alarm signal in an abnormal situation. The alarm signals include level one alarm, level two alarm, level three alarm, and level four alarm. The level one alarm is to immediately cut off the operation of the irradiation accelerator 10 in the control room 5. After the radiation monitoring devices at each radiation point detect that the radiation amount meets the standard, personnel enter the main engine room 1 to repair the irradiation accelerator 10. The level two alarm is to immediately cut off the operation of the irradiation accelerator 10 in the control room 5, increase the cold water supply and circulation of the serpentine water cooling coil 12, and operate again after the cooling of the serpentine water cooling coil 12 reaches the set standard value. The level three alarm is to immediately cut off the operation of the irradiation accelerator 10 in the control room 5, and simultaneously cut off the operation of the feeding warehouse 6. The level four alarm is to immediately cut off the operation of the irradiation accelerator 10 in the control room 5, cut off the operation of the feeding warehouse 6, and at the same time announce the evacuation of personnel.

[0033] The left and right ends of the main isolation wall 11 near the bell mouth are each provided with a cut corner 13 to provide refraction for the radiation beam output by the irradiation accelerator 10. The cut corner 13 at the right end forms a triangular refraction area 14 with the concrete wall 9 on the right side of the irradiation chamber 2, so that the radiation beam output by the irradiation accelerator 10 is always in the triangular refraction area 14 after it hits the cut corner 13 at the right end until it attenuates and disappears.

[0034] The cutting angle 13 is 45°.

[0035] The vertical center line of the isolation main wall 11 is located at one third of the irradiation chamber 2 from bottom to top.

[0036] The concrete wall 9 at the thickness connection between the upper maze 4 and the irradiation chamber 2 and the wall connecting the upper maze 4 with the feeding warehouse 6 and the receiving warehouse 7 are all provided with retaining walls 15, which are used for secondary shielding of the beam particles and refracting them back into the upper maze 4.

[0037] The upper maze 4 is an L-shaped maze.

[0038] The retaining wall 15 is made of concrete or brick wall material, preferably concrete.

[0039] The left and right ends of the main isolation wall 11 away from the irradiation accelerator 10 are also provided with protrusions 16, and the protrusions 16 are used to provide refraction parts for the beam particles.

[0040] Table 1 below shows the detection of radiation points in this application:

[0041]

[0042] Among them, the radiation monitoring devices at both ends of the irradiation accelerator 10 are the first-level alarm points, the isolation main wall 11 near the bell mouth is the second-level alarm point, the inner wall of the main engine room 1 and B1, B6, and B7 corresponding to the irradiation room are the third-level alarm points, and B3 of the receiving warehouse 7 and C3 and B2 of the control room are the fourth-level alarm points.

[0043] The control room receives the data from the radiation monitoring devices at each point and performs the first-level

[0044] In the irradiation room 2, the electron beam at the output end of the irradiation accelerator 10 faces north and hits the tantalum target in the scanning window to generate high-energy X-rays. Therefore, the radiation impact of the shield on the north side of the irradiation room 2 mainly considers the X-rays along the incident direction of the electron beam (0°), and the other directions consider the X-rays at 90° to the incident direction of the electron beam. Since the bottom of the irradiation room 2 is a soil layer and there are no buildings, no analysis and prediction are made.

[0045] The dose outside the shielding wall can be predicted using the following formula:

[0046]

[0047] Where:

[0048] Where: HM—dose equivalent rate around the reference point, μSv / h;

[0049] BX—X-ray shielding transmittance; T—residence factor;

[0050] d—the distance between the X-ray source and the reference point, m;

[0051] D10—absorbed dose rate at a standard reference point 1m away from the X-ray radiation source, Gy / h. D10=60.QIfe……(11-2)

[0052] Where: Q—X-ray emission rate, Gy·m2·mA-1·min-1; I—electron beam intensity, mA;

[0053] fe—X-ray emissivity correction factor

[0054] B x =10 一n ……(11-3)

[0055]

[0056] Where: S—shielding body thickness, cm;

[0057] T1—the first tenth value layer towards the radiation source in the shielding thickness, cm; Te—the equilibrium tenth value layer, which is approximately a constant, cm;

[0058] n—is the number of tenth value layers.

[0059] Table 2 below is a list of calculated parameters for the shielding body of irradiation chamber 2:

[0060]

[0061]

[0062] Table 3 below shows the calculation results of the radiation level around the irradiation room 1:

[0063] Table 4 below shows the calculation results of the radiation level around the irradiation room 2:

[0064]

[0065]

[0066] It can be obtained from Tables 3 and 4 that the maximum radiation dose rate at the accessible area outside the shielding wall of irradiation room 2 is 0.068μSv / h, and the radiation dose equivalent rate at 30cm from the top is 0.322μSv / h, which meets the dose limit requirement of the reference standard "Radiation Safety and Protection of Electron Accelerator Irradiation Device" (HJ979-2018) that "the dose equivalent rate around the area 30cm from the outer surface of the shielding area accessible to personnel outside the electron accelerator irradiation device shall not exceed 2.5μSv / h".

[0067] Although the present application has disclosed multiple aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art, and several modifications and improvements may be made without departing from the concept of the present application, all of which belong to the protection scope of the present application. The multiple aspects and embodiments disclosed in the present application are only for illustration and are not intended to limit the present application. The actual protection scope of the present application shall be subject to the claims.

Claims

1. A radiation-proof wall system for an X-ray electron accelerator for irradiation, comprising a main engine room (1), an irradiation room (2), a lower maze (3), an upper maze (4), a control room (5), a radiation monitoring device, a material delivery warehouse (6), a material receiving warehouse (7), and an external supply equipment area (8), characterized in that: An upper maze (4) and a lower maze (3) are provided on the sides of the upper maze (4) and the control room (5) from top to bottom. An external supply equipment area (8) is provided below the main engine room (1). The main engine room (1), the irradiation room (2), the lower maze (3), the upper maze (4), and the control room (5) are divided by a concrete wall (9). An irradiation accelerator (10) is provided in the main engine room (1). A bell mouth is provided at the output end of the irradiation accelerator (10). An isolation main wall (11) is provided in the irradiation room (2). The isolation main wall (11) is used to isolate and absorb heat. One end of the irradiation accelerator (10) is connected to the irradiation room (2) through the bell mouth output end. The wiring harness is connected to the irradiation room (2) via the irradiation room ( 2) The output end enters the upper maze (4), and the other end of the irradiation accelerator (10) in the main engine room (1) is output to the lower maze (3) through the main engine room (1). The main engine room (1), the irradiation room (2), the lower maze (3), the upper maze (4), and the control room (5) are all provided with radiation monitoring devices. The radiation monitoring devices are used to monitor the radiation amount at each point in the main engine room (1), the irradiation room (2), the lower maze (3), the upper maze (4), and the control room (5). The radiation monitoring devices are electrically connected to the control room (5). The control room (5) is used to control the main engine room (1) and monitor the radiation amount in the main engine room (1), the irradiation room (2), the lower maze (3), and the upper maze (4) in real time.

2. The radiation-proof wall system for an X-ray electron accelerator for irradiation according to claim 1, characterized in that: A serpentine water cooling coil (12) is provided in the isolation main wall (11) for absorbing heat generated by the irradiation accelerator (10) and cooling the isolation main wall (11).

3. The radiation-proof wall system of an X-ray electron accelerator for irradiation according to claim 1, characterized in that: When the monitoring data of the radiation monitoring devices in the main engine room (1), the irradiation room (2), the lower maze (3) and the upper maze (4) exceed the radiation setting value, the control room (5) sends out an alarm signal in an abnormal situation. The alarm signals include a first-level alarm, a second-level alarm, a third-level alarm and a fourth-level alarm. The first-level alarm means that the operation of the irradiation accelerator (10) in the control room (5) is immediately cut off. After the radiation monitoring devices at each radiation point detect that the radiation amount reaches the standard, personnel enter the main engine room (1) to repair the irradiation accelerator (10). The second-level alarm means that the operation of the irradiation accelerator (10) in the control room (5) is immediately cut off, the cold water supply and circulation of the serpentine water cooling coil (12) are increased, and the serpentine water cooling coil (12) is cooled to reach the set standard value before operation. The third-level alarm means that the operation of the irradiation accelerator (10) in the control room (5) is immediately cut off, and the operation of the feeding warehouse (6) is simultaneously cut off. The fourth-level alarm means that the operation of the irradiation accelerator (10) in the control room (5) is immediately cut off, the operation of the feeding warehouse (6) is cut off, and the personnel are informed to evacuate at the same time.

4. The radiation-proof wall system for an X-ray electron accelerator for irradiation according to claim 1, characterized in that: The left and right ends of the isolation main wall (11) close to the bell mouth are each provided with a cut corner (13) to provide refraction for the radiation beam output by the irradiation accelerator (10). The cut corner (13) at the right end and the right concrete wall (9) of the irradiation chamber (2) form a triangular refraction area (14), so that the radiation beam output by the irradiation accelerator (10) is always in the triangular refraction area (14) after it hits the cut corner (13) at the right end until it attenuates and disappears.

5. The radiation-proof wall system for an X-ray electron accelerator for irradiation according to claim 1, characterized in that: The cutting angle (13) is 45°.

6. The radiation-proof wall system of an X-ray electron accelerator for irradiation according to claim 1, characterized in that: The vertical center line of the isolation main wall (11) is located at one third of the irradiation room (2) from bottom to top.

7. The radiation-proof wall system for an X-ray electron accelerator for irradiation according to claim 1, characterized in that: The concrete wall (9) at the thickness connection between the upper maze (4) and the irradiation chamber (2), and the wall connecting the upper maze (4) with the feeding warehouse (6) and the receiving warehouse (7) are all provided with retaining walls (15), and the retaining walls (15) are used for secondary shielding of the beam particles and refracting them back into the upper maze (4).

8. The radiation-proof wall system for an X-ray electron accelerator for irradiation according to claim 1, characterized in that: The upper maze (4) is an L-shaped maze.

9. The radiation-proof wall system of an X-ray electron accelerator for irradiation according to claim 1, characterized in that: The retaining wall (15) is made of one of concrete and brick wall materials.

10. The radiation-proof wall system of an X-ray electron accelerator for irradiation according to claim 1, characterized in that: The left and right ends of the isolation main wall (11) away from the irradiation accelerator (10) are also provided with protrusions (16), and the protrusions (16) are used to provide refraction parts for beam particles.

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