CN203192422U - Shielding casing pipe for preventing gas in air conduit from being activated by neutrons - Google Patents
Shielding casing pipe for preventing gas in air conduit from being activated by neutrons Download PDFInfo
- Publication number
- CN203192422U CN203192422U CN 201320133228 CN201320133228U CN203192422U CN 203192422 U CN203192422 U CN 203192422U CN 201320133228 CN201320133228 CN 201320133228 CN 201320133228 U CN201320133228 U CN 201320133228U CN 203192422 U CN203192422 U CN 203192422U
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- Prior art keywords
- casing pipe
- shielding casing
- circular
- shielded tube
- boracic
- Prior art date
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Abstract
The utility model relates to the technical field of nuclear radiation protection, and provides a shielding casing pipe for preventing gas in an air conduit from being activated by neutrons. The casing pipe is composed of semi-circular and high-density polyethylene boards, semi-circular and high-density boracic polyethylene boards and circular hoops. The inner layer of the shielding casing pipe is formed by splicing the semi-circular and high-density polyethylene boards, the outer layer of the shielding casing pipe is formed by splicing the semi-circular and high-density boracic polyethylene boards, the inner layer and the outer layer of the shielding casing pipe are axially spliced section by section, a stepped shape is adopted at the connector positions, and the outer layer of each section of the shielding casing pipe is fixed through the circular hoops. The shielding casing pipe is installed on the surface of the air conduit, and is simple in structure, convenient to install, strong in reliability, good in shielding effect and easy to maintain.
Description
Technical field
The utility model relates to the nuclear radiation protection technical field, is specifically related to a kind of shielded tube be used to the ventilating duct that prevents neutron activation, is used for the radiation shield of nuclear power unit reactor building ventilating duct.
Background technology
Polythene material has a wide range of applications in the radiation protection field, and it has good shield effectiveness to intermediate neutron and thermal neutron.Ventilating duct is arranged through under the situation of reactor building in nuclear power unit, for avoiding the air in the ventilating duct to be produced radgas by the activation of the neutron field in the reactor building, adopt high-density polyethylene material that pipeline is shielded, shield most intermediate neutrons and thermal neutron, it is very necessary avoiding ducted gas to be activated.
Summary of the invention
The purpose of this utility model is exactly in order to overcome above-mentioned the deficiencies in the prior art part, and a kind of shielded tube be used to the ventilating duct that prevents neutron activation is provided, and it is simple in structure, and is easy to use, good reliability, and shield effectiveness is good.
The purpose of this utility model realizes by following technical measures: a kind of shielded tube be used to the ventilating duct that prevents neutron activation, by semicircle high density polyethylene plate, semicircle high density boracic polyethylene board, circular boop is formed, the internal layer of described shielded tube is spliced by semicircle high density polyethylene plate, the skin of shielded tube is spliced by semicircle high density boracic polyethylene board, the high density polyethylene plate can be thermal neutron with the intermediate neutron slowing down, high density boracic polyethylene board can be implemented effective slowing down to thermal neutron, and the inside and outside two-layer form of splicing piecemeal that all adopts in the axial direction, interface adopts stepped appearance, the skin of every section shielded tube utilizes circular boop to fix, and can realize the shielding of long-distance pipe.
In technique scheme, the inner layer polyethylene plate of described shielded tube directly is coated on the ventilating duct surface.
In technique scheme, the thickness of described polyethylene board and boracic polyethylene board can be determined according to neutron field intensity and the energy distribution of ventilating duct environment of living in.
The utility model is installed on the ventilating duct surface, and is simple in structure, easy for installation, good reliability, and shield effectiveness is good, and is easy to safeguard.
Description of drawings
Fig. 1 is the structural representation of the utility model for the shielded tube of the ventilating duct that prevents neutron activation.
Fig. 2 is the A-A face view of Fig. 1.
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
As shown in Figure 1, 2, present embodiment provides a kind of shielded tube be used to the ventilating duct that prevents neutron activation, comprise in semicircle polyethylene board 1, semicircle boracic polyethylene board 2, circular boop 3, outer boracic polyethylene board otch 4, inner layer polyethylene plate otch 5, outer boracic polyethylene board are axially splicing mouthfuls 6, inner layer polyethylene plate axially outer splicing mouthfuls 7, outer boracic polyethylene board axially outer splicing mouthfuls 8, inner layer polyethylene plate axially in splicing mouthfuls 9.Inner layer polyethylene plate 1 directly is coated on the ventilating duct surface, adopts the form of splicing piecemeal, adjacent two sections axially outer splicing mouthfuls 7 with axially in splicing mouthfuls 9 combine closely, two polyethylene boards 1 are combined closely at otch 5 places; Outer boracic polyethylene board 2 is coated on inner layer polyethylene plate 1 surface, adopts and splices form piecemeal, adjacent two sections axially in splicing mouthfuls 6 and axial outer splicing mouthfuls 8 combine closely, two boracic polyethylene boards 2 are combined closely at otch 4 places.Fix piecemeal at outermost layer with circular boop 3 at last.
In above-described embodiment, the thickness of described polyethylene board and boracic polyethylene board can be adjusted according to neutron field intensity and the energy distribution of environment of living in.
Present embodiment can reach the shield effectiveness more than 99% for intermediate neutron.
The content that is not described in detail in this instructions belongs to the known prior art by the professional and technical personnel.
Claims (2)
1. shielded tube that is used for preventing the ventilating duct of neutron activation, it is characterized in that: formed by semicircle high density polyethylene plate, semicircle high density boracic polyethylene board, circular boop, the internal layer of described shielded tube is spliced by semicircle high density polyethylene plate, the skin of shielded tube is spliced by semicircle high density boracic polyethylene board, and the inside and outside two-layer form of splicing piecemeal that all adopts in the axial direction, interface adopts stepped appearance, and the skin of every section shielded tube utilizes circular boop to fix.
2. the shielded tube be used to the ventilating duct that prevents neutron activation according to claim 1, it is characterized in that: the inner layer polyethylene plate of described shielded tube directly is coated on the ventilating duct surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320133228 CN203192422U (en) | 2013-03-22 | 2013-03-22 | Shielding casing pipe for preventing gas in air conduit from being activated by neutrons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320133228 CN203192422U (en) | 2013-03-22 | 2013-03-22 | Shielding casing pipe for preventing gas in air conduit from being activated by neutrons |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203192422U true CN203192422U (en) | 2013-09-11 |
Family
ID=49109261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320133228 Expired - Fee Related CN203192422U (en) | 2013-03-22 | 2013-03-22 | Shielding casing pipe for preventing gas in air conduit from being activated by neutrons |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203192422U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110570962A (en) * | 2018-03-28 | 2019-12-13 | 中国船舶重工集团公司第七一九研究所 | Local shielding structure of return bend of shielding performance adjustable |
-
2013
- 2013-03-22 CN CN 201320133228 patent/CN203192422U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110570962A (en) * | 2018-03-28 | 2019-12-13 | 中国船舶重工集团公司第七一九研究所 | Local shielding structure of return bend of shielding performance adjustable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130911 |