CN112908498A - Irradiation-resistant slowing shielding device and assembling method thereof - Google Patents
Irradiation-resistant slowing shielding device and assembling method thereof Download PDFInfo
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- CN112908498A CN112908498A CN202110343400.2A CN202110343400A CN112908498A CN 112908498 A CN112908498 A CN 112908498A CN 202110343400 A CN202110343400 A CN 202110343400A CN 112908498 A CN112908498 A CN 112908498A
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- box body
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 claims description 18
- 230000005855 radiation Effects 0.000 claims description 11
- 229910052790 beryllium Inorganic materials 0.000 claims description 9
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052793 cadmium Inorganic materials 0.000 claims description 9
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 9
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 8
- 239000004698 Polyethylene Substances 0.000 claims description 8
- 229910052796 boron Inorganic materials 0.000 claims description 8
- -1 polyethylene Polymers 0.000 claims description 8
- 229920000573 polyethylene Polymers 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 11
- 239000002915 spent fuel radioactive waste Substances 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C11/00—Shielding structurally associated with the reactor
- G21C11/02—Biological shielding ; Neutron or gamma shielding
- G21C11/028—Biological shielding ; Neutron or gamma shielding characterised by the form or by the material
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C11/00—Shielding structurally associated with the reactor
- G21C11/06—Reflecting shields, i.e. for minimising loss of neutrons
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C11/00—Shielding structurally associated with the reactor
- G21C11/08—Thermal shields; Thermal linings, i.e. for dissipating heat from gamma radiation which would otherwise heat an outer biological shield ; Thermal insulation
- G21C11/086—Thermal shields; Thermal linings, i.e. for dissipating heat from gamma radiation which would otherwise heat an outer biological shield ; Thermal insulation consisting of a combination of non-metallic and metallic layers, e.g. metal-sand-metal-concrete
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention discloses an irradiation-resistant slowing-down shielding device and an assembling method thereof, wherein the device comprises a shielding box body with a single-side opening and a sleeve for mounting a neutron detector, the shielding box body comprises an outer steel plate and an inner steel plate, a lead shielding layer is arranged between the outer steel plate and the inner steel plate, a shielding cover plate is arranged at the opening of the shielding box body, an opening through which the sleeve passes is formed in the shielding cover plate, the sleeve is connected with a horn-shaped interface positioned outside the shielding box body, a cubic first slowing-down body is sleeved on the sleeve positioned in the shielding box body, reflecting plates with a multilayer structure are arranged on five side surfaces of the cubic first slowing-down body, and a second slowing-down body is arranged between each reflecting plate and the inner steel plate. The device provided by the invention is reasonable in structural design, convenient to implement, capable of being effectively applied to irradiation-resistant neutron detection, used for installing a neutron detector in a high irradiation environment, capable of realizing high irradiation moderation shielding, good in use effect and convenient to popularize and use.
Description
Technical Field
The invention belongs to the technical field of nuclear radiation measurement, and particularly relates to an irradiation-resistant slowing shielding device and an assembling method thereof.
Background
The spent fuel discharged from the reactor contains unburned fissile elements such as U-235 and newly generated fissile elements such as Pu-239, U-233 and the like, and the accumulation of the fissile elements can cause critical safety accidents in the process of the post-treatment of the spent fuel. Therefore, it is necessary to monitor neutrons in a spent fuel reprocessing site to protect the environment, ensure personnel safety, and prevent the occurrence of nuclear critical safety risks.
At the position of a spent fuel post-treatment process tank body, the gamma dose rate can reach 192Gy/h at most, meanwhile, a large amount of decay heat can be released when radioactive elements decay, the environment condition for neutron detection is severe, at present, in order to prevent the radiation range from expanding, the spent fuel post-treatment process tank body is usually sealed in a shielding chamber formed by shielding walls, a slowing shielding body is arranged on the process tank body in advance, and scattered neutrons and gamma background are shielded to be within the acceptable range of a detector through the slowing shielding body.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an irradiation-resistant moderation shielding device and an assembling method thereof aiming at the defects in the prior art, the device is reasonable in structural design and convenient to realize, can be effectively applied to irradiation-resistant neutron detection, is used for installing a neutron detector in a high irradiation environment, realizes moderation shielding on high irradiation, and is good in using effect and convenient to popularize and use.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides an irradiation-resistant slowing-down shield assembly, includes single face open-ended shielding box and is used for installing neutron detector's sleeve pipe, the shielding box includes outer steel sheet and inlayer steel sheet, be provided with lead shielding layer between outer steel sheet and the inlayer steel sheet, the opening part of shielding box is provided with the shielding apron, be provided with the trompil that supplies the sleeve pipe to pass on the shielding apron, sheathed tube one end is passed the trompil and is stretched into in the shielding box, the sheathed tube other end is connected with and is located the outer tubaeform interface of shielding box, is located the cover is equipped with the first slowing-down body of cubic on the sleeve pipe in the shielding box, cubic all be provided with multilayer structure's reflecting plate on five sides of the first slowing-down body, every it slows-down the body all to be provided with the second between reflecting plate and.
In the irradiation-resistant slowing-down shielding device, the shielding box body is in a cubic shape.
In the irradiation-resistant slowing-down shielding device, the first slowing-down body is made of polyethylene.
In the irradiation-resistant slowing-down shielding device, the reflecting plates form a cube with an opening on one side.
In the irradiation-resistant slowing-down shielding device, the plurality of second slowing-down bodies form a cube with an opening on one side, and the first slowing-down bodies are attached to the inner steel plate at the opening.
In the irradiation-resistant slowing shielding device, the reflecting plate comprises a plurality of layers of metals, and the plurality of layers of metals comprise a first beryllium copper layer, a beryllium layer, a cadmium layer and a second beryllium copper layer which are arranged in a layered mode from the first slowing body to the second slowing body.
According to the irradiation-resistant slowing shielding device, the first beryllium copper layer is a beryllium copper plate with the thickness of 1mm, the beryllium layer is a beryllium plate with the thickness of 1mm, the cadmium layer is a cadmium plate with the thickness of 2mm, and the second beryllium copper layer is a beryllium copper plate with the thickness of 1 mm.
In the irradiation-resistant slowing-down shielding device, the second slowing-down body is made of boron-containing polyethylene with the boron-containing mass fraction of 10%.
The invention also discloses an assembly method of the irradiation-resistant slowing shielding device, which is assembled into the device and comprises the following steps:
firstly, closely attaching scattered reflecting plates to five side surfaces of a cube-shaped first slowing-down body to form a cube with an opening on one side;
secondly, correspondingly and tightly attaching the dispersed second moderators to the reflecting plate to form a cube with an opening on one side;
step three, the assembled first slowing-down body, the reflecting plate and the second slowing-down body are arranged in a shielding box body;
fourthly, mounting the shielding cover plate at the opening of the shielding box body through screws;
step five, inserting the sleeve connected with the horn-shaped interface into the shielding box body through the opening on the shielding cover plate;
and step six, welding and fixing the joint of the sleeve and the shielding cover plate.
Compared with the prior art, the invention has the following advantages:
1. the device of the invention has reasonable structural design and convenient realization.
2. The shielding box body consists of an outer steel plate and an inner steel plate, and lead is filled in the shielding box body to form a lead shielding layer, so that external gamma rays can be effectively shielded, and the influence of the external gamma rays on a neutron detector is inhibited.
3. The invention designs the first moderator made of high-density polyethylene, which can moderate fast neutrons into thermal neutrons, which are reflected by the reflecting plate and collected to the neutron detector, and the neutron detector realizes counting measurement of neutrons.
4. The reflecting plate made of the multilayer metal materials can reflect neutron rays on the outer side surface and collect neutron rays on the detection surface, and the detection efficiency of neutron counting on the detection surface can be effectively improved.
5. The second moderator made of the boron-containing polyethylene can effectively shield neutron rays on the outer side and inhibit the influence of the neutron rays on the neutron detector on the outer side.
6. The irradiation-resistant slowing shielding structure is formed by assembling and splicing, so that the production cost is effectively reduced.
7. The invention can be effectively applied to irradiation-resistant neutron detection, is used for installing a neutron detector in a high irradiation environment, realizes the moderated shielding of high irradiation, has good use effect and is convenient to popularize and use.
In conclusion, the device provided by the invention is reasonable in structural design, convenient to implement, capable of being effectively applied to irradiation-resistant neutron detection, used for installing a neutron detector in a high irradiation environment to realize moderation shielding of high irradiation, good in use effect and convenient to popularize and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a schematic diagram of a first moderator of the present invention;
FIG. 4 is a flow chart of an assembly method of the present invention;
FIG. 5 is a schematic view showing an assembly effect of a first moderator and a reflector plate according to the present invention;
FIG. 6 is a schematic view showing an assembly effect of a first moderator, a reflective plate, and a second moderator according to the present invention;
FIG. 7 is a schematic view showing an assembly effect of a first moderator, a reflection plate, a second moderator, and a shield case according to the present invention;
fig. 8 is a schematic view of the overall assembly effect of the present invention.
Description of reference numerals:
1-a neutron detector; 2, sleeving a pipe; 3, an outer steel plate;
4-inner layer steel plate; 5-lead shielding layer; 6, a shielding cover plate;
7, opening a hole; 8-horn interface; 9 — a first moderator;
10-a reflector plate; 11 — second moderator.
Detailed Description
As shown in fig. 1 to 3, the irradiation-resistant moderating shielding device of the invention comprises a shielding box body with a single-side opening and a sleeve 2 for installing a neutron detector 1, the shielding box body comprises an outer layer steel plate 3 and an inner layer steel plate 4, a lead shielding layer 5 is arranged between the outer layer steel plate 3 and the inner layer steel plate 4, a shielding cover plate 6 is arranged at the opening of the shielding box body, an opening 7 for the sleeve 2 to pass through is arranged on the shielding cover plate 6, the one end of sleeve pipe 2 is passed trompil 7 and is stretched into in the shielded cell, the other end of sleeve pipe 2 is connected with and is located the outer tubaeform interface 8 of shielded cell, is located the cover is equipped with the first slowing down body 9 of cubic on the sleeve pipe 2 in the shielded cell, cubic all be provided with multilayer structure's reflecting plate 10 on five sides of the first slowing down body 9, every all be provided with the second and slow down body 11 between reflecting plate 10 and the inlayer steel sheet 4.
During specific implementation, the shielding box body is composed of an outer steel plate 3 and an inner steel plate 4, lead is filled in the shielding box body, a lead shielding layer 5 is formed, external gamma rays can be effectively shielded, and the influence of the external gamma rays on the neutron detector 1 is inhibited.
In this embodiment, the shielding box has a cubic shape.
In this embodiment, the first moderator 9 is made of polyethylene.
During the concrete implementation, through the first slowing-down body 9 of high density polyethylene material, can slow down fast neutron into thermal neutron, collect neutron detector 1 after reflecting through reflecting plate 10, realize the count measurement to the neutron by neutron detector 1.
In this embodiment, a plurality of the reflective plates 10 form a cube with an opening on one side.
In this embodiment, the plurality of second moderators 11 form a cube with an opening on one side, and the first moderators 9 are closely attached to the inner steel plate 4 at the opening.
In this embodiment, the reflective plate 10 includes a plurality of layers of metals, and the plurality of layers of metals include a first beryllium copper layer, a beryllium layer, a cadmium layer, and a second beryllium copper layer, which are layered in a direction from the first moderator 9 to the second moderator 11.
In this embodiment, the first beryllium copper layer is a beryllium copper plate with a thickness of 1mm, the beryllium layer is a beryllium plate with a thickness of 1mm, the cadmium layer is a cadmium plate with a thickness of 2mm, and the second beryllium copper layer is a beryllium copper plate with a thickness of 1 mm.
During the concrete implementation, through the reflecting plate 10 of multilayer metal material, lateral surface neutron ray can be reflected, detection face neutron ray is collected, the detection efficiency of detection face neutron count can effectively be improved.
In this embodiment, the second moderator 11 is made of boron-containing polyethylene with a boron-containing mass fraction of 10%.
In specific implementation, the second moderator 11 made of boron-containing polyethylene can effectively shield the neutron rays on the outer side and inhibit the influence of the neutron rays on the neutron detector 1 on the outer side.
As shown in fig. 4, the assembling method of the radiation-resistant slowing-down shielding device of the invention comprises the following steps:
firstly, clinging scattered reflecting plates 10 to five side surfaces of a cube-shaped first slowing-down body 9 to form a cube with an opening on one side;
in specific implementation, as shown in fig. 5, the first slowing-down body 9 is provided with a through hole for the casing 2 to pass through, the through hole is close to one side (an opening of the cube is formed by the reflecting plates 10) of the first slowing-down body 9 where the reflecting plates 10 are not arranged, five reflecting plates 10 are provided, and the two reflecting plates 10 are also provided with through holes for the casing 2 to pass through, so that the through holes are kept corresponding during assembly.
Secondly, correspondingly and tightly attaching the dispersed second moderators 11 to the reflecting plate 10 to form a cube with an opening on one side;
in specific implementation, as shown in fig. 6, the second moderator 11 includes five splice assemblies, wherein two of the splice assemblies are also provided with through holes for the sleeves 2 to pass through, and the through holes are kept corresponding during assembly.
Step three, the assembled first moderator 9, the reflecting plate 10 and the second moderator 11 are put into a shielding box body;
step four, mounting the shielding cover plate 6 at the opening of the shielding box body through a screw, and the effect is shown in fig. 7;
step five, the sleeve 2 connected with the horn-shaped interface 8 penetrates through the opening 7 on the shielding cover plate 6 and is inserted into the shielding box body, and the effect is shown in fig. 8;
and step six, welding and fixing the joint of the sleeve 2 and the shielding cover plate 6.
When the device is used, the outer steel plate 3 is welded on the support, the support is installed on the process tank body, one side (the opening of the assembled cube) of the first moderating body 9 and the inner steel plate 4 is close to the process tank body, scattered neutrons and a gamma background are shielded within an acceptable range of the neutron detector 1 through the effects of the lead shielding layer 5, the first moderating body 9, the reflecting plate 10 and the second moderating body 11, and moderating shielding of a high irradiation environment is achieved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (9)
1. An irradiation-resistant moderation shielding device is characterized in that: the neutron detector comprises a shielding box body with an opening on one side and a sleeve (2) used for installing a neutron detector (1), wherein the shielding box body comprises an outer steel plate (3) and an inner steel plate (4), a lead shielding layer (5) is arranged between the outer steel plate (3) and the inner steel plate (4), a shielding cover plate (6) is arranged at an opening of the shielding box body, a hole (7) for the sleeve (2) to pass through is formed in the shielding cover plate (6), one end of the sleeve (2) passes through the hole (7) and stretches into the shielding box body, a horn-shaped interface (8) positioned outside the shielding box body is connected to the other end of the sleeve (2), a cube-shaped first slowing body (9) is sleeved on the sleeve (2) in the shielding box body, and a reflecting plate (10) with a multilayer structure is arranged on five sides of the first slowing body (9), and a second slowing-down body (11) is arranged between each reflecting plate (10) and the inner steel plate (4).
2. A radiation-resistant moderating shield as claimed in claim 1, wherein: the shielding box body is in a cubic shape.
3. A radiation-resistant moderating shield as claimed in claim 1, wherein: the first moderator (9) is made of polyethylene.
4. A radiation-resistant moderating shield as claimed in claim 1, wherein: a plurality of the reflecting plates (10) form a cube with an opening on one side.
5. A radiation-resistant moderating shield as claimed in claim 1, wherein: the second moderators (11) form a cube with an opening on one side, and the first moderators (9) are attached to the inner steel plate (4) at the opening.
6. A radiation-resistant moderating shield as claimed in claim 1, wherein: the reflecting plate (10) comprises a plurality of layers of metal, and the plurality of layers of metal comprise a first beryllium copper layer, a beryllium layer, a cadmium layer and a second beryllium copper layer which are arranged in a layered mode from the first slowing body (9) to the second slowing body (11).
7. A radiation-resistant moderating shield as claimed in claim 6, wherein: the first beryllium copper layer is a beryllium copper plate with the thickness of 1mm, the beryllium layer is a beryllium plate with the thickness of 1mm, the cadmium layer is a cadmium plate with the thickness of 2mm, and the second beryllium copper layer is a beryllium copper plate with the thickness of 1 mm.
8. A radiation-resistant moderating shield as claimed in claim 1, wherein: the second moderator (11) is made of boron-containing polyethylene with the boron-containing mass fraction of 10%.
9. A method of assembling a radiation-resistant, moderated, shielding apparatus, as claimed in claims 1-8, said method comprising the steps of:
firstly, scattering reflecting plates (10) are closely attached to five side surfaces of a cube-shaped first slowing-down body (9) to form a cube with an opening on one side;
secondly, the scattered second moderators (11) are correspondingly attached to the reflecting plate (10) to form a cube with an opening on one side;
step three, the assembled first slowing-down body (9), the reflecting plate (10) and the second slowing-down body (11) are arranged in a shielding box body;
fourthly, mounting the shielding cover plate (6) at the opening of the shielding box body through screws;
step five, the sleeve (2) connected with the horn-shaped interface (8) penetrates through the opening (7) on the shielding cover plate (6) and is inserted into the shielding box body;
and sixthly, welding and fixing the joint of the sleeve (2) and the shielding cover plate (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110343400.2A CN112908498B (en) | 2021-03-30 | 2021-03-30 | Irradiation-resistant slowing shielding device and assembling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110343400.2A CN112908498B (en) | 2021-03-30 | 2021-03-30 | Irradiation-resistant slowing shielding device and assembling method thereof |
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| CN112908498A true CN112908498A (en) | 2021-06-04 |
| CN112908498B CN112908498B (en) | 2022-03-29 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0267994A (en) * | 1988-09-02 | 1990-03-07 | Toshiba Corp | Shielding body for radiation measurement |
| CN101335061A (en) * | 2008-08-06 | 2008-12-31 | 中国原子能科学研究院 | Fuel Damage Delayed Neutron Detection Device |
| CN107966727A (en) * | 2017-11-27 | 2018-04-27 | 中核控制系统工程有限公司 | A kind of neutron composite detecting device |
| CN210606655U (en) * | 2019-06-17 | 2020-05-22 | 陕西卫峰核电子有限公司 | Containment high-range area radiation monitoring device |
| CN112130193A (en) * | 2020-08-20 | 2020-12-25 | 中国原子能科学研究院 | Moderating body device |
-
2021
- 2021-03-30 CN CN202110343400.2A patent/CN112908498B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0267994A (en) * | 1988-09-02 | 1990-03-07 | Toshiba Corp | Shielding body for radiation measurement |
| CN101335061A (en) * | 2008-08-06 | 2008-12-31 | 中国原子能科学研究院 | Fuel Damage Delayed Neutron Detection Device |
| CN107966727A (en) * | 2017-11-27 | 2018-04-27 | 中核控制系统工程有限公司 | A kind of neutron composite detecting device |
| CN210606655U (en) * | 2019-06-17 | 2020-05-22 | 陕西卫峰核电子有限公司 | Containment high-range area radiation monitoring device |
| CN112130193A (en) * | 2020-08-20 | 2020-12-25 | 中国原子能科学研究院 | Moderating body device |
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| CN112908498B (en) | 2022-03-29 |
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Effective date of registration: 20230331 Address after: 710000 Building 3, Phase 2, Xianyuan, No. 15 Shanglinyuan 1st Road, High tech Zone, Xi'an City, Shaanxi Province Patentee after: SHAANXI WEIFENG NUCLEAR INSTRUMENT Inc. Patentee after: CHINA NUCLEAR POWER ENGINEERING Co.,Ltd. Address before: 710118 building B7, military civilian integration industrial park, 176 Biyuan 2nd Road, high tech Zone, Xi'an City, Shaanxi Province Patentee before: SHAANXI WEIFENG NUCLEAR INSTRUMENT Inc. |