CN107731333B - It is installed under a kind of environment for hot or the screening arrangement of maintenance - Google Patents
It is installed under a kind of environment for hot or the screening arrangement of maintenance Download PDFInfo
- Publication number
- CN107731333B CN107731333B CN201710924273.9A CN201710924273A CN107731333B CN 107731333 B CN107731333 B CN 107731333B CN 201710924273 A CN201710924273 A CN 201710924273A CN 107731333 B CN107731333 B CN 107731333B
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- CN
- China
- Prior art keywords
- abnormity
- sheet lead
- environment
- screening arrangement
- shielding sheet
- Prior art date
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Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/02—Selection of uniform shielding materials
- G21F1/08—Metals; Alloys; Cermets, i.e. sintered mixtures of ceramics and metals
- G21F1/085—Heavy metals or alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/006—Safety devices
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F3/00—Shielding characterised by its physical form, e.g. granules, or shape of the material
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Metallurgy (AREA)
- Ceramic Engineering (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present invention provides to be installed or the screening arrangement of maintenance, the screening arrangement include rotation stock, handle, abnormity shielding sheet lead under a kind of environment for hot；Notch is provided on the abnormity shielding sheet lead；Abnormity shielding sheet lead is arranged on the inside of air exhaust passage；Sheet lead center is vertical connect with abnormity shielding for the rotation stock head end, and tail end extends across air exhaust passage；It rotates stock tail end and welds handle, the notch direction of abnormity shielding sheet lead is adjusted by rotational handle；Long rod bush is also cased with outside the rotation stock；Long rod bush is supported by several cross supporting frames being arranged in air exhaust passage.After the present invention uses under the hot environment in spent fuel element shearing hot cell, shield effectiveness is significant, and gamma dose rate reduces, and the duty cycle shortens.
Description
Technical field
The present invention relates to nuclear fuels to post-process field, and in particular to installs under a kind of environment for hot or maintenance
Screening arrangement.
Background technique
Spent fuel element radioactive activity is very high and shear history in generate a large amount of radioactive substances, spent fuel element shearing
Pre- exhaust filtering system is provided in the barrier shield of hot cell.Since the filtration system leakproofness is poor, filter efficiency is low, radiation is easily caused
Property move back, cause exterior domain to pollute, cannot meet the technological requirements, therefore be improved to that a kind of leakproofness is strong, is suitable for strong radiation
Property environment and convenient for the filter replaced at a distance.Filter and wind output channel are attached using flange, two panels
Flange is respectively necessary for being welded with filter air hose, wind output channel mouth, and wind output channel mouth radioactivity is very strong, is unable to satisfy work
Industry personnel's short distance welding requirements.Therefore, it is necessary to design one kind to shield substantial radiation source and do not influence operating personnel's low coverage
Screening arrangement from welding.
Summary of the invention
The purpose of the present invention is to provide the screening arrangement installed or overhauled under a kind of environment for hot, the devices
Have the characteristics that easy to operate, shielding is strong, influence weld job.
It realizes the object of the invention technical solution: being installed under a kind of environment for hot or the screening arrangement of maintenance, it should
Screening arrangement includes rotation stock, handle, abnormity shielding sheet lead；Notch is provided on the abnormity shielding sheet lead；Abnormity shielding
Sheet lead is arranged on the inside of air exhaust passage；Sheet lead center is vertical connect with abnormity shielding for the rotation stock head end, and tail end passes through
Air exhaust passage extends；It rotates stock tail end and welds handle, the notch direction of abnormity shielding sheet lead is adjusted by rotational handle；Institute
Long rod bush is also cased with outside the rotation stock stated；Stock is supported by several cross supporting frames being arranged in air exhaust passage
Casing.
Installed under a kind of environment for hot as described above or the screening arrangement of maintenance, described in abnormity shielding
Sheet lead is overlapped by multilayer sheet lead and is fixed and obtain.
Installed under a kind of environment for hot as described above or the screening arrangement of maintenance, described in cross hang
There are two framves, and the stock casing being cased with outside two cross supporting frames and rotation stock is welded and fixed.
Installed under a kind of environment for hot as described above or the screening arrangement of maintenance, described in rotation stock
Material is carbon steel or stainless steel tube, the slightly longer than length of air exhaust passage.
Installed under a kind of environment for hot as described above or the screening arrangement of maintenance, described in abnormity shielding
Sheet lead is circle or rectangular, is provided with U-shaped or rectangular notch thereon.
Installed under a kind of environment for hot as described above or the screening arrangement of maintenance, described in rotation stock
It is connect with abnormity shielding sheet lead using ring flange is vertical, ring flange is fixed with abnormity shielding sheet lead 7 using fixing bolt.
Installed under a kind of environment for hot as described above or the screening arrangement of maintenance, described in rotation stock
Across stock cannula center, when support device is set up in inside air exhaust passage, rotation stock 4 can 360 ° be freely rotated, and begin
It is overlapped eventually with channel central axes.
Installed under a kind of environment for hot as described above or the screening arrangement of maintenance, described in abnormity shielding
Sheet lead is overlapped fixation by the multilayer sheet lead of 3mm thickness, and sheet lead thickness and the superposition number of plies need to be carried out according to actual radiation data
It calculates.
Effect of the invention is that: it is installed under a kind of environment for hot of the present invention or the shielding of maintenance dress
It sets, after using under the hot environment in spent fuel element shearing hot cell, shield effectiveness is significant, and gamma dose rate is from 10mSv/h
It is reduced to 0.6mSv/h, into welding personnel single highest 80 μm of Sv/h of radioactive dose of hot cell operation, the duty cycle is welded by 3
Work foreshortens to and only completed whole welding, installation exercise with 3 days for industry 11 months.
1 operating personnel's radioactive dose table of table
| Operating personnel | Into number | Single highest radioactive dose/μ Sv |
| A | 8 | 79 |
| B | 7 | 68 |
| C | 10 | 80 |
Detailed description of the invention
Fig. 1 is the screening arrangement structural representation installed or overhauled under a kind of environment for hot of the present invention
Figure；
Fig. 2 is a kind of lead screen schematic diagram of a layer structure belonging to the present invention.
In figure: 1- air exhaust passage；2- long rod bush；3- cross supporting frame；4- rotates stock；5- handle；6- notch；7- is different
Shape shields sheet lead；8- fixing bolt；9- ring flange.
Specific embodiment
In the following with reference to the drawings and specific embodiments to of the present invention a kind of for installing or examining under hot environment
The screening arrangement repaired is further described.
Solid gamma dose rate reaches 10mSv/h at spent fuel element shearing hot cell walkthrough wind filter wind output channel mouth, radiates
Property it is very strong, operation is unable to reach personal single radioactive dose no more than 500 μ Sv/d at this, is monthly no more than the radiation of 1mSv
Requirement of shelter.To reduce welding personnel radioactive dose, wind output channel mouth radioactive substance need to effectively be shielded, it is ensured that operation
The radioactivity of personnel is by according to level-controlled.Screening arrangement need to be easily installed, dismantle, shield effectiveness is strong and does not influence weld job.
As shown in Figure 1 to Figure 2, the present invention provides installs or the screening arrangement of maintenance under a kind of environment for hot,
The screening arrangement includes rotation stock 4, handle 5, abnormity shielding sheet lead 7 etc..
U-shaped notch 6 is provided on the circle abnormity shielding sheet lead 7；Air exhaust passage 1 is provided with outside abnormity shielding sheet lead 7.
The abnormity shielding sheet lead 7 is overlapped by multilayer sheet lead and is fixed and obtain, such as: abnormity shielding sheet lead 7 is by the 7 of 3mm thickness
Layer sheet lead is overlapped fixation.
7 center of sheet lead is vertical connect with abnormity shielding for 4 head end of rotation stock, and tail end passes through the extension of air exhaust passage 1
Out；It rotates 4 tail end of stock and welds handle 5, adjust the direction of the notch 6 of abnormity shielding sheet lead 7, by rotational handle 5 convenient for screen
Weld job is carried out while covering source item.
4 outside of rotation stock is also cased with long rod bush 2；Pass through 2 cross hang being arranged in air exhaust passage 1
Frame 3 supports long rod bush 2.The long rod bush 2 being cased with outside two cross supporting frames 3 and rotation stock 4 is welded and fixed.Two cross-shapeds
3 size of space of support is determined by the length and diameter of air exhaust passage 1.Cross supporting frame 3 passes through stock clamping device for its long distance
From in feeding air exhaust passage 1.
4 material of rotation stock is carbon steel or stainless steel tube, the slightly longer than length of air exhaust passage 1.
The rotation stock 4 is connect with abnormity shielding sheet lead 7 using ring flange 9 is vertical, ring flange 9 and abnormity shielding lead
Skin 7 is fixed using fixing bolt 8.
The rotation stock 4 passes through long 2 center of rod bush, when support device is set up in inside air exhaust passage, rotation
Stock 4 can 360 ° be freely rotated, and be overlapped always with channel central axes.
The present invention shields gamma activity source item using sheet lead.Lead screen layer uses the multilayer abnormity screen with U-shaped mouth 6
The superposition of sheet lead 7 is covered, multilayer abnormity shields 7 area of sheet lead and need to be adapted with installing or overhauling position size, crosses conference and block welding
Position, it is on the contrary then shielding properties can be reduced.
Abnormity shielding sheet lead is generally circular can also to make squarely or other shapes as needed, and radius is according to shielding source
Size can be adjusted, and be provided with U-shaped can also be fabricated to round, rectangular or other shapes notch thereon as needed.
Claims (7)
1. the screening arrangement installed or overhauled under a kind of environment for hot, it is characterised in that: the screening arrangement includes turning
Dynamic stock (4), handle (5), abnormity shielding sheet lead (7)；
Notch (6) are provided in abnormity shielding sheet lead (7)；Abnormity shielding sheet lead (7) is arranged on the inside of air exhaust passage；
Sheet lead (7) center is vertical connect with abnormity shielding for rotation stock (4) head end, and tail end passes through air exhaust passage (1) and prolongs
It stretches out；Stock (4) tail end welding handle (5) is rotated, notch (6) side of abnormity shielding sheet lead (7) is adjusted by rotational handle (5)
To；
Long rod bush (2) are also cased with outside the rotation stock (4)；By be arranged in air exhaust passage (1) several ten
Word support frame (3) supports long rod bush (2).
2. the screening arrangement installed or overhauled under a kind of environment for hot according to claim 1, feature exist
It is overlapped in: described abnormity shielding sheet lead (7) by multilayer sheet lead and fixes and obtain.
3. the screening arrangement installed or overhauled under a kind of environment for hot according to claim 1, feature exist
In: there are two the cross supporting frames (3), the long rod bush being cased with outside two cross supporting frames (3) and rotation stock (4)
(2) it is welded and fixed.
4. the screening arrangement installed or overhauled under a kind of environment for hot according to claim 1, feature exist
In: rotation stock (4) material is carbon steel or stainless steel tube, the slightly longer than length of air exhaust passage (1).
5. the screening arrangement installed or overhauled under a kind of environment for hot according to claim 1, feature exist
Be in: described abnormity shielding sheet lead (7) it is round or rectangular, be provided with U-shaped or rectangular notch thereon.
6. the screening arrangement installed or overhauled under a kind of environment for hot according to claim 1, feature exist
In: the rotation stock (4) is connect with abnormity shielding sheet lead (7) using ring flange (9) are vertical, and ring flange (9) and abnormity shield
Sheet lead (7) are covered to be fixed using fixing bolt (8).
7. the screening arrangement installed or overhauled under a kind of environment for hot according to claim 1, feature exist
In: the rotation stock (4) passes through long rod bush (2) center, when support device is set up in inside air exhaust passage, rotation length
Bar (4) can 360 ° be freely rotated, and be overlapped always with channel central axes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710924273.9A CN107731333B (en) | 2017-09-30 | 2017-09-30 | It is installed under a kind of environment for hot or the screening arrangement of maintenance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710924273.9A CN107731333B (en) | 2017-09-30 | 2017-09-30 | It is installed under a kind of environment for hot or the screening arrangement of maintenance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107731333A CN107731333A (en) | 2018-02-23 |
| CN107731333B true CN107731333B (en) | 2019-08-13 |
Family
ID=61209718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710924273.9A Active CN107731333B (en) | 2017-09-30 | 2017-09-30 | It is installed under a kind of environment for hot or the screening arrangement of maintenance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107731333B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108320825A (en) * | 2017-12-21 | 2018-07-24 | 中核四0四有限公司 | A kind of screening arrangement for installation and repairing under hot environment |
| CN117086526A (en) * | 2023-10-12 | 2023-11-21 | 中国核电工程有限公司 | Welding device for radiation environment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201792264U (en) * | 2010-08-05 | 2011-04-13 | 浙江皇冠电动工具制造有限公司 | Explosion-proof protecting cover of angular polishing machine |
| CN102872658A (en) * | 2012-09-05 | 2013-01-16 | 中国核电工程有限公司 | Exhaust pre-filter device changed outside hot cell |
| CN202762235U (en) * | 2012-07-16 | 2013-03-06 | 中国核电工程有限公司 | Exhaust pre-filtering device for hot cell |
| CN205765633U (en) * | 2016-06-01 | 2016-12-07 | 江西隆祥钢结构工程有限公司 | A kind of steel structure material polishing machine easy to use |
| CN206464883U (en) * | 2017-01-25 | 2017-09-05 | 常州轻工职业技术学院 | The contractile Digit Control Machine Tool of cutter |
-
2017
- 2017-09-30 CN CN201710924273.9A patent/CN107731333B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201792264U (en) * | 2010-08-05 | 2011-04-13 | 浙江皇冠电动工具制造有限公司 | Explosion-proof protecting cover of angular polishing machine |
| CN202762235U (en) * | 2012-07-16 | 2013-03-06 | 中国核电工程有限公司 | Exhaust pre-filtering device for hot cell |
| CN102872658A (en) * | 2012-09-05 | 2013-01-16 | 中国核电工程有限公司 | Exhaust pre-filter device changed outside hot cell |
| CN205765633U (en) * | 2016-06-01 | 2016-12-07 | 江西隆祥钢结构工程有限公司 | A kind of steel structure material polishing machine easy to use |
| CN206464883U (en) * | 2017-01-25 | 2017-09-05 | 常州轻工职业技术学院 | The contractile Digit Control Machine Tool of cutter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107731333A (en) | 2018-02-23 |
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