CN107346669B - A kind of flexible shielding method for high radioactivity foundation pit - Google Patents
A kind of flexible shielding method for high radioactivity foundation pit Download PDFInfo
- Publication number
- CN107346669B CN107346669B CN201710595216.0A CN201710595216A CN107346669B CN 107346669 B CN107346669 B CN 107346669B CN 201710595216 A CN201710595216 A CN 201710595216A CN 107346669 B CN107346669 B CN 107346669B
- Authority
- CN
- China
- Prior art keywords
- foundation pit
- shielding
- bag
- high radioactivity
- shield
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- G21F3/00—Shielding characterised by its physical form, e.g. granules, or shape of the material
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
-
- 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
Abstract
The invention discloses a kind of flexible shielding methods for high radioactivity foundation pit, comprising steps of size of the step 1) according to live foundation pit, one production, processing shielded layer to match；Step 2) is needing to place shielded layer above radial objects in the foundation pit shielded；Step 3) then loads shielding material, forms it into a bulk shield；Radial objects in foundation pit are shielded.It successfully solves putting property of height place temporary shield and constructs the problems such as middle personnel's exposure dosage high, time-consuming, Master Cost height, the method for the present invention is feasible, process, safe and efficient, easy to operate, save the cost, reduces secondary waste yield.It ensure that staff's operating area radioactive radiation level reaches acceptable numerical value, to smoothly complete the construction operation in the region.
Description
Technical field
The present invention relates to a kind of nuclear radiation fields, and in particular to a kind of flexible shielding method for high radioactivity foundation pit.
Background technique
In the numerous nuclear facilities in China, there are a large amount of service works and need retired facility, equipment, workshop, in operation
It needs personnel to enter inside facility in journey closely to operate.Part workshop radioactive dosage is higher, needs to carry out make-up shielding, and
Traditional shielding mode generally uses that lead brick constructs shielded layer or personnel enter in mobile shield and operate.Using lead brick structure
Shielded layer higher cost is built, constructs and still needs with personnel in demolishing process by near operation；Using personnel in mobile shield
Operation, personnel's operation are restricted, and cannot be from shielding to active area at all.
Summary of the invention
The purpose of the present invention is to be to overcome the shortage of prior art, and it is an object of the present invention to provide a kind of for high radioactivity foundation pit
Flexible shielding method temporarily shields the high radioactivity substance radioactivity of putting in foundation pit in storage high radioactivity foundation pit region job
It covers.It solves and shielded layer higher cost is constructed using lead brick, construct and still need with personnel in demolishing process by near operation；Using
Personnel shield in-vivo procedures mobile, and personnel's operation is restricted, and cannot be from all to active area progress shielding problem.
The present invention is achieved through the following technical solutions:
A kind of flexible shielding method for high radioactivity foundation pit, comprising steps of
Size of the step 1) according to live foundation pit, one production, processing shielded layer to match；
Step 2) is needing to place shielded layer above radial objects in the foundation pit shielded；
Step 3) then loads shielding material, forms it into a bulk shield；To the radial objects in foundation pit into
Row shielding.
Further, the shielded layer uses shielding bag, by into shielding bag air-blowing form shielded layer, and to shielding bag
Interior filling shielding material.
Further, the shielding bag selects internal layer rubber and the bonding of outer layer canvas to sew.
Further, the shielding material chooses 6-8 mesh model quartz sand, density 2.6t/m3, bulk density 1.6t/m3。
Further, further include that step 4) constructs shield, complete after operation is carried out in the region；Utilize industrial dust collector
Shielding material is extracted, is recycled.
Further, further include step 5), shielding bag is deflated, take out shielding bag using electric block, complete shield
Recovery operation.
Compared with prior art, the present invention having the following advantages and benefits:
The invention discloses the flexible shielding method in high radioactivity place, belongs to military nuclear installation and civilian nuclear facilities moves back
Labour and Radwastes treatment technical field.It creatively proposes to construct the present invention be directed to high radioactivity region and removes flexibility
Shield for carrying out make-up shielding, successfully solve putting property of height place temporary shield construct middle personnel's exposure dosage it is high,
The problems such as time-consuming, Master Cost height, the method for the present invention is feasible, process, safe and efficient, easy to operate, save the cost, subtracts
Few secondary waste yield.It ensure that staff's operating area radioactive radiation level reaches acceptable numerical value, thus
Smoothly complete the construction operation in the region.
A shielding bag is packed into hole, the air-blowing into shielding bag makes it form air bag in hole, then filling quartz
Sand forms it into a bulk shield, shields to radioactive waste, and the radiation level of near coal-mine surrounding is less than mesh after shielding
Scale value.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is a kind of structural schematic diagram that the shielding bag for foundation pit radioactivity flexible shielding is put of the present invention；
Label and corresponding parts title in attached drawing:
1- foundation pit, 2- shielded layer, 3- shielding material, 4- inflatable bag body, 5- load shielding material mouth, 6- inflating port, and 7- is received
Hold together bracing wire, 8- foundation pit and bag body closed loop.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment
As shown in Figure 1, a kind of flexible shielding method for high radioactivity foundation pit of the present invention, comprising steps of
Size of the step 1) according to live foundation pit 1, one production, processing shielding bag to match；Shielding bag selects internal layer
Rubber and the bonding of outer layer canvas sew.
Step 2) is needing to place shielding bag above radial objects in the foundation pit 1 shielded；Shielding material 3 chooses 6-8 mesh
Model quartz sand, density 2.6t/m3, bulk density 1.6t/m3。
Step 3) then loads shielding material 3 into shielding bag, forms it into a bulk shield；To in foundation pit 1
Radial objects are shielded.When near coal-mine center radioactive dosage is less than 100 μ Sv/h, reach the accumulation screen of shielding material 3
Cover thickness.
Step 4) constructs shield, completes after operation is carried out in the region；Shielding material 3 is carried out using industrial dust collector
It extracts, recycling.
Step 5) deflates shielding bag, takes out shielding bag using electric block, completes shield recovery operation.
Shielding bag in embodiment includes inflatable bag body 4, and for containing shielding material 3, inflatable bag body 4 is inflatable bag body 4
Square body hollow structure, inflatable bag body 4 are sewed using hose lining and the bonding of outer cortex canvas, and top surface is set on inflatable bag body 4
There is filling shielding material mouth 5, contains shielding material 3 into inflatable bag body 4 by loading shielding material mouth 5.Load shielding material
5 sides of mouth are connected with inflating port 6, are inflated by inflating port 6 to inflatable bag body 4.The inflatable bag body left side, the right side and bottom surface are equipped with
More gathering bracing wires 7.More gathering bracing wires 7 also are provided on face, back and bottom surface before inflatable bag body.The upper top of inflatable bag body 4
Face edge ring is arranged with foundation pit and bag body closed loop 8.Foundation pit and bag body closed loop 8 are also bonded using hose lining and outer cortex canvas
It sews.
Specific implementation step:
(1) selecting the bonding of hose lining outer cortex canvas to be sewn into shielding bag 1, (canvas layer and rubber layer are by irradiation test
Afterwards, two kinds of material appearances, colors do not change, and material tensile strength does not change.Canvas layer and rubber layer are anti-tie, anti-
Run-down effect, sealing performance are all relatively better by verifying.It is leaked simultaneously in view of waste is possible to stab bag body, the bag of selection
Body material has certain self-repair function after poking, such as MIS sizing material).
(2) it by the quartz sand of 5 kinds of different models of investigation, and by shield effectiveness verification test and SHIELDING CALCULATION, selectes
6-8 mesh quartz sand is as shielding material 3.By outdoor verification test, measures industrial dust collector and extract 6-8 mesh model quartz sand
150 kilograms need 4 minutes, and industrial dust collector weight set is 150 kilograms, shut down after overweight, need to pour out quartz sand in bucket
Restarting is extracted afterwards.Industrial dust collector continuous operation 2 hours without failure.
(3) staff dressed protection tool by shielding bag rule it is folded neat after, near coal-mine fill in hole by existing
It is interior, shielding bag inflating port is stayed in outside hole, by pressing empty machine to be inflated shielding bag.After bag to be shielded is inflated, it will shield
Bag air inlet is fixed on guide cylinder, is put near coal-mine by guide cylinder and is fixed, and filling quartz sand, whole operation process are ready for
It is middle closely near coal-mine with the air inlet of air purification small car, extract the aerosol being discharged in hole.
(4) funnel is installed on small rail car in advance, then by small rail car be moved in put hole side and go out funnel
Mouth is aligned with guide cylinder import, is adjusted angle, is fixed funnel.Outdoor ready quartz sand is passed through on small rail car
Funnel be transported in put hole near coal-mine, to small rail car be moved in put hole side, funnel exit is aligned with to guide cylinder import
Afterwards, flashboard is opened, quartz sand flows into hole in free falling body state.Near coal-mine dosage is detected when filling quartz sand, when
Near coal-mine center dosage finally forms a shielded layer less than 100 μ Sv/h above waste.
(5) it after completing construction operation, is extracted inner shield quartz sand is cheated to transferring barrel with industrial dust collector, passes through rail
Road trolley transports road designated position, and detects to quartz sand radiation level, provides according to testing result according to waste management
It is handled.
(6) after quartz sand extraction finishes, continue to take away air in shielding bag using industrial dust collector, it first will shielding
The rope made of hemp inside bag is promoted, and is then lifted out the rope made of hemp outside shielding bag, is gradually collapsed with rope, and shielding bag is allowed to be about to certainly as far as possible
Bottom package, up promotes all ropes finally by electric block, and shielding bag is proposed to cheat.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (6)
1. a kind of flexible shielding method for high radioactivity foundation pit, which is characterized in that comprising steps of
Size of the step 1) according to live foundation pit (1), one production, processing shielded layer (2) to match；
Step 2) places shielded layer (2) above foundation pit (1) the interior radial objects for needing to shield；
Step 3) then loads shielding material (3), forms it into a bulk shield；To the radial objects in foundation pit (1)
It is shielded；
The shielded layer (2) uses shielding bag, by air-blowing formation shielded layer (2) into shielding bag, and loads into shielding bag
Shielding material (3).
2. a kind of flexible shielding method for high radioactivity foundation pit according to claim 1, it is characterised in that: the screen
Covering bag selects internal layer rubber and the bonding of outer layer canvas to sew.
3. a kind of flexible shielding method for high radioactivity foundation pit according to claim 1, it is characterised in that: the screen
It covers material (3) and chooses 6-8 mesh model quartz sand, density 2.6t/m3, bulk density 1.6t/m3。
4. a kind of flexible shielding method for high radioactivity foundation pit according to claim 3, it is characterised in that: when near coal-mine
When center radioactive dosage is less than 100 μ Sv/h, reach shielding material (3) accumulation shielding thickness.
5. a kind of flexible shielding method for high radioactivity foundation pit according to claim 1, it is characterised in that: further include
Step 4) constructs shield, completes after operation is carried out in the region；Shielding material (3) is extracted using industrial dust collector,
Recycling.
6. a kind of flexible shielding method for high radioactivity foundation pit according to claim 5, it is characterised in that: further include
Step 5) deflates shielding bag, takes out shielding bag using electric block, completes shield recovery operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710595216.0A CN107346669B (en) | 2017-07-20 | 2017-07-20 | A kind of flexible shielding method for high radioactivity foundation pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710595216.0A CN107346669B (en) | 2017-07-20 | 2017-07-20 | A kind of flexible shielding method for high radioactivity foundation pit |
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| Publication Number | Publication Date |
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| CN107346669A CN107346669A (en) | 2017-11-14 |
| CN107346669B true CN107346669B (en) | 2019-06-14 |
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| CN201710595216.0A Active CN107346669B (en) | 2017-07-20 | 2017-07-20 | A kind of flexible shielding method for high radioactivity foundation pit |
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| CN107331424B (en) * | 2017-07-21 | 2019-06-14 | 中国核动力研究设计院 | A kind of reactor cavity water filling cooling system and its operating method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204966066U (en) * | 2015-06-24 | 2016-01-13 | 深圳中广核工程设计有限公司 | Flat technological wastes material interim storage cask of medium radioactive water |
| JP5882045B2 (en) * | 2011-12-21 | 2016-03-09 | 株式会社サンメック | Radiation shielding bag |
| CN105976882A (en) * | 2016-05-31 | 2016-09-28 | 中国科学院高能物理研究所 | Nuclear radiation shielding device and method |
| CN206134271U (en) * | 2016-09-27 | 2017-04-26 | 江苏中海华核电材料科技有限公司 | Spentnuclear fuel dry -type container with polyethylene post |
-
2017
- 2017-07-20 CN CN201710595216.0A patent/CN107346669B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5882045B2 (en) * | 2011-12-21 | 2016-03-09 | 株式会社サンメック | Radiation shielding bag |
| CN204966066U (en) * | 2015-06-24 | 2016-01-13 | 深圳中广核工程设计有限公司 | Flat technological wastes material interim storage cask of medium radioactive water |
| CN105976882A (en) * | 2016-05-31 | 2016-09-28 | 中国科学院高能物理研究所 | Nuclear radiation shielding device and method |
| CN206134271U (en) * | 2016-09-27 | 2017-04-26 | 江苏中海华核电材料科技有限公司 | Spentnuclear fuel dry -type container with polyethylene post |
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| CN107346669A (en) | 2017-11-14 |
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