CN219349813U - Light shielding system suitable for high-energy industrial irradiation accelerator - Google Patents
Light shielding system suitable for high-energy industrial irradiation accelerator Download PDFInfo
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Abstract
The utility model belongs to shielding system, concretely relates to be applicable to high energy industry irradiation accelerator light shielding system. The light shielding system suitable for the high-energy industrial irradiation accelerator comprises a shielding body, a conveyor belt and an under-beam cooling device, wherein a cavity is formed in the shielding body and used for placing irradiated substances, the under-beam cooling device is arranged at the lowest part of the shielding body, the conveyor belt is arranged above the under-beam cooling device, and a scanning window is arranged at the center of the cavity of the shielding body. The novel remarkable effect is: this novel bottom does not design the shield body, directly falls to the ground in the use and adopts the earth shielding, greatly reduced the load of shield body.
Description
Technical Field
The utility model belongs to shielding system, concretely relates to be applicable to high energy industry irradiation accelerator light shielding system.
Background
The irradiation technology can replace the existing disinfection and sterilization technology, but in terms of public health emergency systems, the existing high-energy irradiation accelerator shielding body is loaded by hundreds of tons, and the movable and quick response problems cannot be realized. The utility model provides a light compound shielding system with solve high energy irradiation accelerator heavy load and be the fundamental problem, establish technical foundation for high energy accelerator mobilizable operation to further implement national security strategy, perfect emergent disinfection and sterilization demand in the public health emergency system of china.
The high-energy irradiation accelerator mainly utilizes the generated electron beam to act on substances for sterilization, material modification, material crosslinking and other applications, and has the advantages of low maintenance cost, high processing efficiency, strong penetrating power and cyclic irradiation on high-density and large-package products. The existing high-energy irradiation accelerators in China are built in fixed irradiation places, the shielding body of the high-energy irradiation accelerators is mainly made of reinforced concrete, the thickness of the shielding body is 1.5-2.7 m, the load reaches hundreds of tons, and accelerated mobile use cannot be achieved. Therefore, a light composite shielding system needs to be designed, and the light composite shielding system has the characteristics of good shielding effect, low load, portability and the like, and solves the problem of quick response in an emergency state.
Disclosure of Invention
The utility model provides a be applicable to high energy industry irradiation accelerator light shielding system to prior art's defect.
The novel implementation is as follows: the light shielding system suitable for the high-energy industrial irradiation accelerator comprises a shielding body, a conveyor belt and an under-beam cooling device, wherein a cavity is formed in the shielding body and used for placing irradiated substances, the under-beam cooling device is arranged at the lowest part of the shielding body, the conveyor belt is arranged above the under-beam cooling device, and a scanning window is arranged at the center of the cavity of the shielding body.
One type of lightweight shielding system suitable for use with high energy industrial irradiation accelerators as described above, wherein the shielding comprises a bottom shielding system, a sidewall shielding system, and a top shielding system.
The light shielding system suitable for the high-energy industrial irradiation accelerator comprises a water tank made of aluminum, and circulating water is arranged in the water tank.
The light shielding system suitable for the high-energy industrial irradiation accelerator is disclosed, wherein the water tank is double-layer, and each layer is arranged in a labyrinth manner; circulating water in the first layer passes through the scanning window four times; the circulating water of the second layer passes through the scanning window three times.
The light shielding system suitable for the high-energy industrial irradiation accelerator is characterized in that the thickness of an aluminum shell is not more than 1mm, the thickness of a water layer is not less than 5.2cm, and a titanium film is arranged on the surface of the water layer.
The light shielding system for the high-energy industrial irradiation accelerator is suitable for the high-energy industrial irradiation accelerator, wherein when the circulating water is sewage containing germs, if the 10MeV electron beam is used for irradiation sterilization of a water body, the thickness of the first layer of circulating water is 3.9cm.
The light shielding system suitable for the high-energy industrial irradiation accelerator comprises a side wall shielding system, wherein the side wall shielding system comprises a three-level shielding body, the first-level shielding body and the second-level shielding body are formed by concentric semicircles, a local shielding body with 1/4 arc is additionally arranged outside the second-level shielding body, the three-level shielding body is formed by concentric 1/4 arc, and shielding materials on two sides of a conveying channel and at the top are aluminum, polyethylene and lead from inside to outside in sequence.
The light shielding system suitable for the high-energy industrial irradiation accelerator is characterized in that the internal clear width of the primary shielding body is 55cm, the internal clear height of the primary shielding body is 90cm, and the thickness of the side wall material from inside to outside is set as follows: the thickness of aluminum is not less than 1cm, the thickness of polyethylene is not less than 3cm, the thickness of lead is not less than 32cm,
the internal clear width of the secondary shielding body is 55cm, the internal clear height of the secondary shielding body is 60cm, and the inner side wall material is formed by setting the thickness from inside to outside as follows: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, and the thickness of lead is not less than 8cm; the thickness of the outer side wall material from inside to outside is as follows: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, and the thickness of lead is not less than 12cm;
the inside clear width of tertiary shield is 55cm, and tertiary shield clear height is 60cm, and inside wall material sets up to by inside-out thickness: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, and the thickness of lead is not less than 2cm; the thickness of the outer side wall material from inside to outside is as follows: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, and the thickness of lead is not less than 5cm.
The light shielding system suitable for the high-energy industrial irradiation accelerator comprises a top shielding system, wherein the top shielding system comprises a three-level shielding body, the first-level shielding body and the second-level shielding body are formed by concentric semicircles, a local shielding of 1/4 circular arc is additionally arranged outside the second-level shielding body, the three-level shielding body is formed by concentric 1/4 circular arc, and the top shielding material is aluminum, polyethylene and lead from inside to outside in sequence.
A lightweight shielding system suitable for high energy industrial irradiation accelerators as described above, wherein the primary shield top material is set from inside to outside thickness: the thickness of aluminum is not less than 1cm, the thickness of polyethylene is not less than 3cm, the thickness of lead is not less than 28cm,
the top material of the secondary shielding body is formed by the following thicknesses from inside to outside: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, the thickness of lead is not less than 22cm,
the thickness of the top material of the three-level shielding body is set as follows: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, and the thickness of lead is not less than 5cm.
The novel remarkable effect is: (1) This novel bottom does not design the shield body, directly falls to the ground in the use and adopts the earth shielding, greatly reduced the load of shield body.
(2) The novel shielding system for the high-energy accelerator mainly plays roles of absorbing electrons and shielding X rays through a multi-layer shielding structure. In the design process of the shielding system, firstly, the targeting material is set to be water or aluminum, so that the yield of X-rays is reduced; the side wall and the top of the shielding system are made of aluminum, polyethylene, lead, iron and other materials respectively, wherein the aluminum and the polyethylene are selected as materials for absorbing and scattering electrons on the inner side of the shielding system, the thickness of the shielding system meets the range of electrons in the corresponding materials, and the X-ray yield generated by missed and scattered electron targeting is reduced. Lead and iron are respectively selected outside the material, wherein the material lead is mainly used for shielding X rays, and the iron sheet is used for protecting the lead from being damaged. By using the combination of different materials, the shielding load of the existing 5-10 MeV accelerator can be reduced from hundreds of tons to about thirty-six tons, and the vehicle-mounted mobility of the shielding body can be realized.
(3) The novel radiation shielding device selects a plurality of material combinations to shield rays, wherein an aqueous medium is selected as a target material under a scanning window, the yield of bremsstrahlung radiation is reduced, and the earth is used as a main shielding body of a ray bundle; shielding the leakage ray beam by using a primary shielding body according to X-ray energy generated by electron beam targeting; and shielding the scattered ray beams by using a secondary shielding body and a tertiary shielding body, so that the dosage rate of the outside of the shielding body and the dosage rate of the goods in and out are reduced, and the dosage rate of the outside 30cm of the shielding body is not more than 2.5 mu Gy/h by using MCNP for analog simulation.
(4) This novel design adopts two "U" types to accelerator shield, and the furthest reduces the shared effective space of shield, when increasing ray bundle scattering number of times, reduces the load of shield. After the shielding body is designed in a double U shape, the width of the shielding body is not more than 2.5m, the height of the shielding body is not more than 2m, and the requirement of road transportation on the maximum size (width is 2.5m multiplied by 4.5 m) of box transportation can be met.
(5) The utility model discloses to accelerator irradiation process radiant energy conversion to heat energy, probably lead to the fact the destruction to irradiation article and shielding body material, set up transmission system below water layer into flow system, as the cooling system of accelerator, promptly through the water flow conduction heat to realize the promotion of temperature in the limited space, under the circumstances that rivers set up 1m/s, accelerator 24h operation, the temperature rise is no more than 2 ℃.
Drawings
FIG. 1 is a schematic view of a bottom shielding material arrangement;
FIG. 2a is a schematic view of a bottom shield material circulating water layer arrangement;
FIG. 2b is a first circulating water stream layer;
FIG. 2c is a second recirculating water layer;
FIG. 3 is a cross-sectional view of an irradiation beam window shield;
FIG. 4 is a diagram of the three-stage shield distribution of the irradiation sterilization device of the novel high-energy mobile electron accelerator;
FIG. 5 is a diagram showing the sidewall shielding profile of the irradiation sterilization device of the novel high-energy mobile electron accelerator
FIG. 6 is a cross-sectional view of a primary shield
FIG. 7 is a cross-sectional view of a secondary shield
FIG. 8 is a cross-sectional view of a three-stage shield
In the figure: 1. container, 2. Irradiation sterilization zone, 3. Conveyor belt, 4. Scanning window, 5. Beam down cooling device, 6. Aluminum, 7. Circulating water layer, 8. Roller, 9. Titanium film, 10, first layer water tank, 11. Second layer water tank, 12. Overflow tank, 13. Scanning window, 14. Upper layer, 15. Water tank, 16. Water inlet, 17. Water outlet, 18. Lower layer, 19. Shielding body, 20. Irradiation box body, 20-1 electron beam
A primary shield (21);
a primary outer shield (21-1);
primary outer layer aluminum (21-1-1); primary outer layer polyethylene (21-1-2); primary outer lead (21-1-3);
a primary inner shield (21-2);
primary inner layer aluminum (21-2-1); primary inner layer polyethylene (21-2-2); primary inner lead (21-2-3);
a primary shield top cover (21-3);
primary top layer aluminum (21-3-1); primary top layer polyethylene (21-3-2); primary top lead (21-3-3); a secondary shield (22);
a secondary outer shield (22-1);
secondary outer layer aluminum (22-1-1); a secondary outer layer polyethylene (22-1-2); secondary outer lead (22-1-3);
a secondary inner shield (22-2);
secondary inner layer aluminum (22-2-1); a secondary inner layer polyethylene (22-2-2); secondary inner lead (22-2-3);
a secondary shield top cover (22-3);
secondary top layer aluminum (22-3-1); a secondary top layer polyethylene (22-3-2); secondary top lead (22-3-3); a tertiary shield (23);
a tertiary outer shield (23-1);
three-stage outer aluminum (23-1-1); tertiary outer layer polyethylene (23-1-2); tertiary outer lead (23-1-3);
a three-stage inner shield (23-2);
three-stage inner layer aluminum (23-2-1); tertiary inner layer polyethylene (23-2-2); tertiary inner lead (23-2-3);
a third shield top cover (23-3);
three-stage top aluminum (23-3-1); three-stage top layer polyethylene (23-3-2); three-level top lead (23-3-3);
Detailed Description
The present utility model will now be described in further detail with reference to the accompanying drawings, which are simplified schematic illustrations of the basic structure of the present utility model, which are merely illustrative.
The utility model relates to a light combined material shielding system suitable for high energy accelerator, this shielding system combines with current accelerator, can realize the target of on-vehicle accelerator removal, has realized commercialization in view of high energy accelerator, therefore the inside accelerator part's of shielding system design is not in this novel scope.
The utility model relates to a be applicable to high energy accelerator light combined material shielding system, including bottom shielding system, lateral wall shielding system and top shielding system. The whole arrangement mode of the shielding system and the accelerator in the container is arranged according to an upper area and a lower area, namely the upper layer is used for arranging accelerator components, and the lower layer is used for arranging the accelerator shielding system. The present utility model is described only with respect to an accelerator shielding system in a lower portion of a container:
1) Bottom shielding system
The bottom shielding system is mainly used for shielding the main ray beam direction of the industrial irradiation accelerator. The novel accelerator and shielding body based container are placed in the container, the container is placed on the ground, and the ground is utilized for shielding. Therefore, the bottom shielding material is mainly used for reducing the yield of the bremsstrahlung X-rays caused by accelerator targeting, and lays a foundation for reducing the thickness of the side wall and the top shielding material. The bottom shielding material is provided with low mass number substances (water and aluminum) as target materials to reduce the yield of bremsstrahlung radiation, wherein the aluminum is used as a wrapping layer of circulating water which is used as a main material for electron beam targeting and can be used as a cooling medium in the irradiation process and a transfer medium for reducing heat energy in the irradiation process. Meanwhile, in order to prevent the electron beam from directly irradiating the rollers of the transport rail (the rollers are generally made of iron, and the yield of bremsstrahlung radiation is higher than that of water and aluminum due to the direct irradiation of the electron beam), the interval between the rollers under the scanning window is required to be larger than the width of the scanning window.
In order to further realize the utility model, cooling device comprises aluminum hull and water, and aluminum hull thickness is not more than 1mm, and the thickness of water layer is not less than 5.2cm.
In order to further realize the utility model, cooling device is located the below that transports the passageway gyro wheel, for avoiding spilling over of hydrologic cycle process, keeps apart with the titanium membrane.
In order to further realize the utility model, if the water circulation medium is replaced by the sewage containing germs, the disinfection and sterilization work of the water body can be realized. The optimal thickness of the water body based on 10MeV electron beam irradiation disinfection and sterilization should be controlled to be about 3.9cm, so that the accelerator scanning window sewer circulation system is arranged into two layers, wherein the thickness of the first layer is not more than 3.9cm.
In order to further realize the utility model, roller spacing is greater than the width of scanning window under the scanning window, and the width of scanning window is 3cm, and the interval of beam transport system gyro wheel is not less than 6cm.
2) Sidewall shielding system
The accelerator scan window is a source of radiation source term for accelerator operation, and thus the shielding system is concerned with a range of shielding including external shielding of the accelerator scan window and shielding of the cargo conveyance path. The cargo transportation channel shielding adopts a double U-shaped shielding body, and is divided into three-level shielding bodies according to the scattering energy of ray beams, wherein the first-level shielding body and the second-level shielding body are composed of concentric semicircles, and the three-level shielding bodies are composed of concentric 1/4 circular arcs. The shielding materials at the two sides and the top of the conveying channel are aluminum, polyethylene and lead in sequence from inside to outside. The shielding structure is schematically shown in fig. 1.
In order to further realize the utility model, the inside clear width of one-level shielding body is 55cm, the inside clear height of one-level shielding body is 90cm, and the lateral wall material sets up to by inside to outside thickness: the thickness of aluminum is not less than 1cm, the thickness of polyethylene is not less than 3cm, and the thickness of lead is not less than 32cm.
In order to further realize the utility model, the inside clear width of secondary shield is 55cm, the inside clear height of secondary shield is 60cm, and inside wall material sets up to by inside-out thickness: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, and the thickness of lead is not less than 8cm; the thickness of the outer side wall material from inside to outside is as follows: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, the thickness of lead is not less than 12cm, and the added local shielding material is set as follows: the thickness of the lead is not less than 16cm;
in order to further realize the utility model, the inside clear width of tertiary shield body is 55cm, tertiary shield body clear height is 60cm, and inside wall material sets up to by inside-out thickness: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, and the thickness of lead is not less than 2cm; the thickness of the outer side wall material from inside to outside is as follows: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, and the thickness of lead is not less than 5cm.
3) Top shielding system
According to the double U-shaped shielding bodies of the side walls, the top shielding system is divided into three-level shielding bodies according to the scattering energy of the ray beams, wherein the first-level shielding body and the second-level shielding body are composed of concentric semicircles, and the three-level shielding bodies are composed of concentric 1/4 circular arcs. The top shielding material is sequentially aluminum, polyethylene and lead from inside to outside.
In order to further realize the utility model, the first-level shielding body top material sets up to from inside to outside thickness: the thickness of aluminum is not less than 1cm, the thickness of polyethylene is not less than 3cm, and the thickness of lead is not less than 28cm.
In order to further realize the utility model, second grade shield body top material is from inside to outside set up thickness and is: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, and the thickness of lead is not less than 22cm.
To further realize the utility model, tertiary shield top material sets up to from inside to outside thickness: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, and the thickness of lead is not less than 5cm.
Examples
The novel irradiation sterilization shielding structure of the mobile electron accelerator comprises a shielding body, a conveyor belt and a beam cooling device, wherein the shielding body is as shown in fig. 5-8, and the beam cooling device comprises the following components:
the irradiation sterilization area is located inside the container, and the irradiation sterilization area comprises: the device comprises a first-stage shielding body, a second-stage shielding body, a third-stage shielding body, a conveyor belt, a scanning box and an under-beam cooling device.
The primary shield includes: a primary inner shield, a primary outer shield, and a primary top shield. The primary inboard shield includes: primary inner layer aluminum, primary inner layer polyethylene and primary inner layer lead. The primary outside shield includes: primary outer aluminum, primary outer polyethylene, and primary outer lead. The primary topside shield includes: primary top aluminum, primary top polyethylene, primary top lead.
The internal clear width of the primary shielding body is 55cm, and the internal clear height of the primary shielding body is 90cm. The thickness of the primary inner layer aluminum, the primary outer layer aluminum and the primary top layer aluminum is not less than 1cm; the thickness of the first-stage inner polyethylene, the first-stage outer polyethylene and the first-stage top polyethylene is not less than 3cm; the thicknesses of the primary inner lead and the primary outer lead are not less than 32cm, and the primary top lead is not less than 28cm.
The secondary shield includes: the shielding device comprises a secondary inner shielding body, a secondary outer shielding body, an additionally arranged side wall local shielding body and a secondary top shielding body. The secondary inside shield includes: secondary inner layer aluminum, secondary inner layer polyethylene and secondary inner layer lead. The secondary outboard shield includes: the secondary outer layer aluminum, the secondary outer layer polyethylene and the secondary outer layer lead are additionally provided with partial shielding of lead. The secondary topside shield includes: secondary top aluminum, secondary top polyethylene, secondary top lead.
The internal clear width of the secondary shielding body is 55cm, and the internal clear height of the secondary shielding body is 60cm. The thickness of the secondary inner layer aluminum, the secondary outer layer aluminum and the secondary top layer aluminum is not less than 1mm; the thickness of the secondary inner layer polyethylene, the secondary outer layer polyethylene and the secondary top layer polyethylene is not less than 4mm; the thickness of the secondary inner layer lead is not less than 8cm, the thickness of the secondary outer layer lead is not less than 12cm, the thickness of the added local shielding is not less than 16cm, and the thickness of the secondary top layer lead is not less than 22cm.
The tertiary shield includes: three-level inboard shield, three-level outboard shield, and three-level topside shield. The tertiary inboard shield includes: three-level inner aluminum, three-level inner polyethylene and three-level inner lead. The tertiary outside shield includes: three-stage outer layer aluminum, three-stage outer layer polyethylene and three-stage outer layer lead. The tertiary topside shield includes: three-level top aluminum, three-level top polyethylene and three-level top lead.
The internal clear width of the three-stage shielding body is 55cm, and the clear height of the three-stage shielding body is 60cm. The thickness of the three-level inner layer aluminum, the three-level outer layer aluminum and the three-level top layer aluminum is not less than 1mm; the thickness of the tertiary inner layer polyethylene, the tertiary outer layer polyethylene and the tertiary top layer polyethylene is not less than 4mm; the thickness of the three-stage inner layer lead is not less than 2cm, the thickness of the three-stage outer layer lead is not less than 5cm, and the thickness of the three-stage top layer lead is not less than 5cm.
The beam cooling device consists of an aluminum shell and water, wherein the thickness of the aluminum shell is not more than 1mm, and the thickness of a water layer is not less than 5.2cm. In order to further realize the utility model, cooling device is located the below that transports passageway gyro wheel conveyer belt, for avoiding spilling over of hydrologic cycle process, keeps apart with the titanium membrane.
The interval between the lower rollers of the scanning window is larger than the width of the scanning window, the width of the scanning window is 3cm, and the interval between the rollers of the conveyor belt is not smaller than 6cm. Ensuring that the electron beam does not strike the conveyor belt directly.
The conveyer belt is located the shield body inside, is not less than 6cm from ground.
In addition to the several supplementary notes,
1. accelerator energy and power
According to the accelerator classification, the accelerator with the electron energy of 5-10 MeV is divided into high-energy accelerators, and the accelerator is a 10MeV electron linear accelerator with the maximum energy as an example, so that the accelerator is suitable for all types of electron linear accelerators with the electron energy of 5-10 MeV and the power of 5-20 kW.
2. Under-window material for accelerator scanning
The beam outlet width of the accelerator scanning window is 3-5 cm, the roller under the beam is arranged at 6-10 cm, the electron beam can directly irradiate into a water tank under the roller, the thickness of the water tank is not less than 5cm, the range of the maximum energy of 10MeV electrons is met, the generation of the bremsstrahlung X-rays can be effectively reduced by using a water layer as an electron beam targeting material, and other targets with low mass numbers (Z < 20) are all selected in the range of protective rights.
3. Light composite shielding material
The light composite shielding material combination is designed according to a light-weight-first-heavy-material combination, wherein the bremsstrahlung generated by missed and scattered electron targeting is reduced by using a low-mass-number material, and electrons are absorbed by using an aluminum material, and the light-weight material thickness combination meets the range of the maximum electron energy; the high-quality number material is used for shielding X-rays, so that the dosage rate generated by transmitting the X-rays is ensured to meet the requirement of 2.5 mu Gy/h. Any combination of shielding materials and related material alternatives are within the scope of the present utility model.
4. Appearance of shielding material
For effectively reducing the load of shielding material, this novel adopts two "U" types to the design of accelerator labyrinth, and every bend all adopts circular-arc can furthest's reduce shielding material's use amount, and any portable shielding system labyrinth design adopts two U type modes all to be in this protection authority scope.
Claims (10)
1. A lightweight shielding system suitable for high energy industrial irradiation accelerators, characterized by: the device comprises a shielding body, a conveyor belt and a beam lower cooling device, wherein a cavity is formed in the shielding body and used for placing irradiated substances, the beam lower cooling device is arranged at the lowest part of the shielding body, the conveyor belt is arranged above the beam lower cooling device, and a scanning window is arranged at the center of the cavity of the shielding body.
2. A lightweight shielding system for a high energy industrial irradiation accelerator as defined in claim 1, wherein: the shield includes a bottom shield system, a sidewall shield system, and a top shield system.
3. A lightweight shielding system for a high energy industrial irradiation accelerator as defined in claim 2, wherein: the bottom shielding system comprises a water tank made of aluminum, and circulating water is arranged in the water tank.
4. A lightweight shielding system for a high energy industrial irradiation accelerator as defined in claim 3, wherein: the water tank is double-layered, and each layer is arranged in a labyrinth manner; circulating water in the first layer passes through the scanning window four times; the circulating water of the second layer passes through the scanning window three times.
5. A lightweight shielding system for a high energy industrial irradiation accelerator as defined in claim 4, wherein: the thickness of the aluminum shell is not more than 1mm, the thickness of the water layer is not less than 5.2cm, and a titanium film is arranged on the surface of the water layer.
6. A lightweight shielding system for a high energy industrial irradiation accelerator as defined in claim 5, wherein: when the circulating water is the sewage containing germs, if the 10MeV electron beam is used for irradiating the sterilized water body, the thickness of the first layer of circulating water is 3.9cm.
7. A lightweight shielding system for a high energy industrial irradiation accelerator as defined in claim 2, wherein: the side wall shielding system comprises a three-level shielding body, wherein the first-level shielding body and the second-level shielding body are formed by concentric semicircles, a local shielding body with 1/4 arc is additionally arranged outside the second-level shielding body, the three-level shielding body is formed by concentric 1/4 arc, and shielding materials on two sides and the top of the conveying channel are aluminum, polyethylene and lead from inside to outside in sequence.
8. A lightweight shielding system for a high energy industrial irradiation accelerator as defined in claim 7, wherein: the inside clear width of the first-level shielding body is 55cm, the inside clear height of the first-level shielding body is 90cm, and the side wall materials are set as from inside to outside: the thickness of aluminum is not less than 1cm, the thickness of polyethylene is not less than 2cm, the thickness of lead is not less than 32cm,
the internal clear width of the secondary shielding body is 55cm, the internal clear height of the secondary shielding body is 60cm, and the inner side wall material is formed by setting the thickness from inside to outside as follows: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, and the thickness of lead is not less than 8cm; the thickness of the outer side wall material from inside to outside is as follows: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, and the thickness of lead is not less than 12cm; the added local shielding material is set as follows: the thickness of the lead is not less than 16cm,
the inside clear width of tertiary shield is 55cm, and tertiary shield clear height is 60cm, and inside wall material sets up to by inside-out thickness: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, and the thickness of lead is not less than 2cm; the thickness of the outer side wall material from inside to outside is as follows: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, and the thickness of lead is not less than 5cm.
9. A lightweight shielding system for a high energy industrial irradiation accelerator as defined in claim 2, wherein: the top shielding system comprises a three-level shielding body, wherein the first-level shielding body and the second-level shielding body are formed by concentric semicircles, a local shielding body with 1/4 arc is additionally arranged outside the second-level shielding body, the three-level shielding body is formed by concentric 1/4 arc, and the top shielding material is sequentially aluminum, polyethylene and lead from inside to outside.
10. A lightweight shielding system for a high energy industrial irradiation accelerator as defined in claim 9, wherein: the top material of the primary shielding body is formed by the following steps of: the thickness of aluminum is not less than 1cm, the thickness of polyethylene is not less than 3cm, the thickness of lead is not less than 28cm,
the top material of the secondary shielding body is formed by the following thicknesses from inside to outside: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, the thickness of lead is not less than 22cm,
the thickness of the top material of the three-level shielding body is set as follows: the thickness of aluminum is not less than 1mm, the thickness of polyethylene is not less than 4mm, and the thickness of lead is not less than 5cm.
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| CN202222941832.6U CN219349813U (en) | 2022-11-04 | 2022-11-04 | Light shielding system suitable for high-energy industrial irradiation accelerator |
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| CN202222941832.6U CN219349813U (en) | 2022-11-04 | 2022-11-04 | Light shielding system suitable for high-energy industrial irradiation accelerator |
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