CN113245327A - Decontamination method and device for radioactive storage tank - Google Patents
Decontamination method and device for radioactive storage tank Download PDFInfo
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- CN113245327A CN113245327A CN202110705861.XA CN202110705861A CN113245327A CN 113245327 A CN113245327 A CN 113245327A CN 202110705861 A CN202110705861 A CN 202110705861A CN 113245327 A CN113245327 A CN 113245327A
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- storage tank
- pressure water
- radioactive storage
- radioactive
- dirt
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- 230000002285 radioactive effect Effects 0.000 title claims abstract description 192
- 238000005202 decontamination Methods 0.000 title claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 130
- 239000007921 spray Substances 0.000 claims abstract description 47
- 230000003588 decontaminative effect Effects 0.000 claims abstract description 34
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 239000010865 sewage Substances 0.000 claims description 26
- 238000001914 filtration Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 15
- 238000005086 pumping Methods 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 7
- 238000009270 solid waste treatment Methods 0.000 claims description 5
- 230000005855 radiation Effects 0.000 claims description 4
- 239000000356 contaminant Substances 0.000 claims 1
- 238000004140 cleaning Methods 0.000 description 6
- 241000196324 Embryophyta Species 0.000 description 3
- 230000009194 climbing Effects 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 241000220317 Rosa Species 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/0856—Cleaning of water-treatment installations
Abstract
The invention discloses a decontamination method for a radioactive storage tank, which comprises the following steps: hoisting the high-pressure water spray heads of the robot and the high-pressure water unit into the radioactive storage tank through the through holes on the radioactive storage tank; the robot carries a high-pressure water spray head to move in the radioactive storage tank, and high-pressure water sprayed by the high-pressure water spray head decontaminates the interior of the radioactive storage tank; discharging the dirt generated in the decontamination process out of the radioactive storage tank. The invention also discloses a decontamination device for the radioactive storage tank. The radioactive storage tank decontamination method can clean the interior of a radioactive storage tank at a short distance without dead angles, and meets the requirement of removing dirt in the radioactive storage tank.
Description
Technical Field
The invention particularly relates to a radioactive storage tank decontamination method and a radioactive storage tank decontamination device.
Background
During decommissioning of radioactive storage tanks, the radioactive material remaining on the inner walls of the storage tanks can cause high radioactive dose levels inside the storage tanks, and therefore decontamination of the inner walls of the storage tanks is required during decommissioning of the radioactive storage tanks.
In the prior art, high-pressure water is often used for decontaminating a radioactive storage tank, but because the radioactive storage tank is large in size, a common high-pressure water tool cannot clean the radioactive storage tank in a short distance, and the aim of removing dirt blocks such as paint coats and the like in the radioactive storage tank and comprehensively decontaminating the inner wall of the radioactive storage tank is difficult to achieve.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method and a device for decontaminating a radioactive storage tank, aiming at the defects in the prior art, wherein the method can clean the interior of the radioactive storage tank in a short distance without dead angles, and can meet the requirement of removing the dirt in the radioactive storage tank.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method of decontaminating a radioactive storage tank, comprising the steps of:
hoisting the high-pressure water spray heads of the robot and the high-pressure water unit into the radioactive storage tank through the through holes on the radioactive storage tank;
the robot carries a high-pressure water spray head to move in the radioactive storage tank, and high-pressure water sprayed by the high-pressure water spray head decontaminates the interior of the radioactive storage tank;
discharging the dirt generated in the decontamination process out of the radioactive storage tank.
Preferably, the robot carries the high-pressure water nozzle to move in the radioactive storage tank, and the decontamination of the interior of the radioactive storage tank by the high-pressure water sprayed by the high-pressure water nozzle specifically comprises:
the robot carries the high-pressure water spray head to crawl from the bottom plate of the radioactive storage tank to the side wall of the radioactive storage tank and then to the top plate of the radioactive storage tank, and then the top plate, the side wall and the bottom plate of the radioactive storage tank are sequentially decontaminated by high-pressure water sprayed by the high-pressure water spray head.
Preferably, the discharging of the dirt generated in the decontamination process to the outside of the radioactive storage tank is specifically:
pumping the dirt generated in the decontamination process out of the radioactive storage tank into a filtering assembly so as to separate dirt blocks from the sewage in the dirt;
sending the separated sewage to a corresponding waste liquid treatment device for treatment according to the radioactivity of the sewage;
and sending the separated dirt blocks to a corresponding solid waste treatment device for treatment according to the radioactivity of the dirt blocks.
Preferably, before the robot and the high-pressure water spray head are hoisted into the radioactive storage tank through the through hole on the radioactive storage tank, the method further comprises the following steps:
covering a gas curtain on the through hole of the radioactive storage tank for conveying gas into the radioactive storage tank;
and the number of the first and second groups,
and the radioactive storage tank is provided with an exhaust unit for pumping the gas in the radioactive storage tank, filtering and discharging the gas.
Preferably, before the robot and the high-pressure water spray head are hoisted into the radioactive storage tank through the through hole on the radioactive storage tank, the method further comprises the following steps: and a lifting unit is arranged near the through holes of the lifting robot and the high-pressure water spray head and is arranged in the gas curtain.
The invention also provides a decontamination device for the radioactive storage tank, which comprises a high-pressure water unit and a robot,
the high-pressure water unit comprises a high-pressure water spray head, and the high-pressure water spray head is used for providing high-pressure water;
the robot is used for driving the high-pressure water spray head to move in the radioactive storage tank, and high-pressure water sprayed by the high-pressure water spray head decontaminates the interior of the radioactive storage tank.
Preferably, the radioactive reservoir decontamination apparatus further comprises a soil discharge unit, the soil discharge unit comprising a filter assembly and a soil pump,
the dirt pump is arranged in the radioactive storage tank and used for pumping dirt generated in the decontamination process into the filtering assembly;
the filtering component is arranged outside the radioactive storage tank and is used for separating dirt blocks in the dirt from the sewage.
Preferably, the filter assembly comprises a filter box, a dose rate monitor meter and a differential pressure meter,
the filter tank is connected with the sewage pump and is used for separating sewage blocks from sewage in the sewage;
the differential pressure meter is arranged in the filter tank and is used for measuring the pressure difference of a filter in the filter tank;
the dosage rate monitoring instrument is arranged in the filter box and used for measuring the dosage rate of dirt in the filter box.
Preferably, the radioactive storage tank decontamination device further comprises an air inlet unit, an air outlet unit and an air curtain,
the gas tent is covered on a through hole of a radioactive storage tank for lifting the high-pressure water spray head and the robot and is used for shielding radiation in the radioactive storage tank;
the air inlet unit comprises an air source and an air source pipe, one end of the air source pipe is connected with the air source, and the other end of the air source pipe extends into the air tent and is used for introducing air into the radioactive storage tank;
the exhaust unit is arranged outside the radioactive storage tank and is used for pumping the gas introduced into the radioactive storage tank, filtering the gas and then discharging the filtered gas.
Preferably, the radioactive storage tank decontamination plant further comprises a lifting unit, wherein the lifting unit comprises an electric hoist, and the electric hoist is used for lifting the robot, the high-pressure water spray head and the through hole plug for plugging the through hole.
According to the decontamination method for the radioactive storage tank, the robot and the high-pressure water nozzle are placed in the radioactive storage tank, so that the robot can move in the radioactive storage tank by carrying the high-pressure water nozzle, high-pressure water sprayed from the high-pressure water nozzle can clean the interior of the radioactive storage tank in a short distance, the cleaning efficiency is high, and no dead angle exists.
The radioactive storage tank decontamination device can directly clean the interior of the radioactive storage tank and remove dirt in the radioactive storage tank, and is simple in structure and convenient to operate.
Drawings
Fig. 1 is a schematic structural view of a radioactive storage tank decontamination apparatus in an embodiment of the present invention.
In the figure: 1-a robot; 2-a through hole plug; 3-a filter box; 4-air tent; 5-electric hoist.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of the present invention.
The invention provides a decontamination method for a radioactive storage tank, which comprises the following steps:
hoisting the high-pressure water spray heads of the robot and the high-pressure water unit into the radioactive storage tank through the through holes on the radioactive storage tank;
the robot carries a high-pressure water spray head to move in the radioactive storage tank, and high-pressure water sprayed by the high-pressure water spray head decontaminates the interior of the radioactive storage tank;
discharging the dirt generated in the decontamination process out of the radioactive storage tank.
The invention also provides a decontamination device for the radioactive storage tank, which comprises a high-pressure water unit and a robot,
the high-pressure water unit comprises a high-pressure water spray head, and the high-pressure water spray head is used for providing high-pressure water;
the robot is used for driving the high-pressure water spray head to move in the radioactive storage tank, and high-pressure water sprayed by the high-pressure water spray head decontaminates the interior of the radioactive storage tank.
Example 1:
the embodiment discloses a radioactive storage tank decontamination method, which comprises the following steps:
first, the robot 1 and the high pressure water jet of the high pressure water unit are hoisted into the radioactive storage tank through the through hole on the radioactive storage tank.
Then, the robot 1 moves inside the radioactive storage tank with the high-pressure water jet, and the inside of the radioactive storage tank is decontaminated by the high-pressure water jetted by the high-pressure water jet.
Specifically, the robot 1 carries the high-pressure water spray head to crawl from the bottom plate of the radioactive storage tank to the side wall of the radioactive storage tank and then to the top plate of the radioactive storage tank, and then the high-pressure water sprayed by the high-pressure water spray head is used for sequentially decontaminating the top plate, the side wall and the bottom plate of the radioactive storage tank.
In this embodiment, robot 1 is including climbing wall subassembly and decontamination subassembly, and wherein, decontamination subassembly sets up on climbing the wall subassembly for centre gripping water under high pressure shower nozzle, the washing of the radioactive storage tank of spun water under high pressure in the water under high pressure shower nozzle of being convenient for, climbing wall subassembly then is used for driving decontamination subassembly and water under high pressure shower nozzle and removes in the radioactive storage tank, and the decontamination is washd to each position of radioactive storage tank inner wall that makes water under high pressure in the water under high pressure shower nozzle can be closely.
Finally, the dirt produced during decontamination is discharged outside the radioactive storage tank.
Specifically, the dirt generated in the decontamination process is pumped out of the filtering assembly outside the radioactive storage tank so as to separate dirt blocks from the sewage in the dirt.
Wherein, the separated sewage is sent to a corresponding waste liquid treatment device for treatment according to the radioactivity.
And sending the separated dirt blocks to a corresponding solid waste treatment device for treatment according to the radioactivity of the dirt blocks.
In this embodiment, before the robot 1 and the high-pressure water nozzle are hoisted into the radioactive storage tank through the through hole on the radioactive storage tank, the method further includes:
the through hole of the radioactive storage tank is covered with a gas curtain 4 for conveying gas into the radioactive storage tank.
In this embodiment, before the robot 1 and the high-pressure water nozzle are hoisted into the radioactive storage tank through the through hole on the radioactive storage tank, the method further includes:
and the radioactive storage tank is provided with an exhaust unit for pumping the gas in the radioactive storage tank, filtering and discharging the gas.
The gas enters the radioactive storage tank from the gas curtain 4 and is discharged from the exhaust unit, so that the unidirectional flow of the gas in the radioactive storage tank is ensured, and the radioactive gas in the radioactive storage tank is prevented from overflowing from a through hole on the storage tank.
Wherein, the gas is normally naturally and unidirectionally fed from the outside of the gas net 4.
In this embodiment, before the robot 1 and the high-pressure water nozzle are hoisted into the radioactive storage tank through the through hole on the radioactive storage tank, the method further includes: and hoisting units are arranged near the hoisting robot 1 and the through holes of the high-pressure water spray heads and are arranged in the gas curtain 4. Wherein, the handling unit is used for handling robot 1, high pressure water shower and is used for blockking up the through-hole stopper 2 of through-hole, wherein, when not carrying out the washing operation of radioactive storage tank, blocks up through-hole stopper 2 on the through-hole, shields radioactive radiation in the radioactive storage tank. When the radioactive reservoir is cleaned, the through-hole plug 2 may be placed elsewhere on top of the radioactive reservoir.
Specifically, the radioactive decontamination method in this example includes:
1. preparation stage before decontamination:
an air curtain 4 is covered above the through hole of the radioactive storage tank and is used for communicating the air inlet unit and the air outlet unit with the radioactive storage tank.
And then, installing a lifting unit and a high-pressure water pipe in the gas curtain 4, wherein two ends of the high-pressure water pipe are respectively connected with a high-pressure water source and a high-pressure water spray head, and the high-pressure water source is arranged outside the gas curtain 4.
Next, the robot 1 and the high-pressure water jet are placed in the radioactive storage tank by the lifting unit.
In this embodiment, the through hole is usually an outer manhole or a manhole with a relatively large diameter, so that the robot 1 and the high pressure water jet can enter the radioactive storage tank.
Preferably, the diameter of the outer manhole or other manway will be enlarged to facilitate entry of the robot 1 into the radioactive reservoir.
2. A decontamination stage:
in the decontamination stage, the robot 1 carries a high-pressure water spray head to decontaminate the inner wall of the radioactive storage tank.
Specifically, the robot 1 crawls from the bottom plate of the radioactive storage tank to the side wall, then crawls from the side wall to the top plate, and then decontaminates the top plate, the side wall and the bottom plate of the radioactive storage tank.
In this embodiment, during decontamination, negative pressure is required to be maintained in the radioactive storage tank to prevent radioactive gas in the radioactive storage tank from being directly released into the gas curtain 4 or out of the radioactive storage tank without treatment. Wherein the pressure in the radioactive storage tank is-500 to-100 Pa (gauge pressure).
In this embodiment, the negative pressure state in the radioactive storage tank is ensured by using the air exhaust unit to exhaust air.
3. A waste treatment stage:
the dirt produced during the decontamination phase is discharged outside the radioactive storage tank.
The radioactive storage tank is externally provided with a filtering assembly which is connected with the output end of the sewage pump and used for separating a dirty block in sewage from sewage, wherein the dirty block (including rust, asphalt paint skin and the like which are washed off on the inner wall of the radioactive storage tank) is intercepted in the filtering assembly by the filtering assembly, when the dirty block in the filtering assembly is collected to a certain amount, the dirty block is conveyed to a corresponding solid waste treatment device for treatment according to the radioactivity of the dirty block, and the separated sewage is conveyed to a corresponding waste liquid treatment device for treatment according to the radioactivity of the dirty block after collection, sampling and analysis.
Preferably, the filtering assembly is a pipeline filter, a differential pressure meter and a dose rate detecting instrument are arranged in the pipeline filter, and when the reading of the differential pressure meter or the dose rate detecting instrument reaches a set value, a filter element in the pipeline filter is replaced.
Wherein, the replaced filter element is placed on the liquid receiving disc for more than 1 day for fully draining the free water in the filter element.
In this embodiment, send into the collecting vessel in to filtering component for place the filter core after the dripdrying, and according to the dose rate instrumentation to the testing result of filter core, send the filter core to corresponding solid useless processing apparatus and handle. Wherein, the collecting barrel adopts the collecting barrel with the capacity of 200L.
According to the decontamination method for the radioactive storage tank, the robot 1 carries the high-pressure water spray head to move in the radioactive storage tank, so that the high-pressure water sprayed out of the high-pressure water spray head can clean the interior of the radioactive storage tank in a short distance, the cleaning efficiency is high, and no dead angle exists.
Example 2:
the embodiment discloses a decontamination device for a radioactive storage tank, which comprises a high-pressure water unit and a robot 1, wherein the high-pressure water unit comprises a high-pressure water spray head, the high-pressure water spray head is used for providing high-pressure water, and the high-pressure water can be directly used for cleaning and decontaminating the radioactive storage tank.
The robot 1 is used for driving the high-pressure water spray head to move in the radioactive storage tank, and high-pressure water sprayed by the high-pressure water spray head decontaminates the interior of the radioactive storage tank.
The radioactive storage tank decontamination device in the embodiment carries the high-pressure water nozzle to move in the radioactive storage tank through the robot 1, so that the high-pressure water sprayed out of the high-pressure water nozzle can be used for cleaning the radioactive storage tank in a short distance, the cleaning effect is better, and no dead angle is left in the cleaning process.
In this embodiment, the radioactive storage tank decontamination device further comprises a dirt discharge unit, wherein the dirt discharge unit comprises a filter assembly and a dirt pump, and the dirt pump is arranged in the radioactive storage tank and used for pumping dirt generated in the decontamination process into the filter assembly.
The filtering component is arranged outside the radioactive storage tank and is used for separating dirt blocks in the dirt from the sewage.
In this embodiment, the filter assembly is a duct filter.
In this embodiment, filtering component includes rose box 3, dose rate monitor meter and differential pressure meter, and wherein, rose box 3 is connected with the filth pump for dirty piece and the sewage separation in the filth.
The differential pressure gauge is arranged in the filter tank 3 and is used for measuring the pressure difference of the filter in the filter tank 3. When the measured pressure difference reaches a set value, the filter element of the pipe filter needs to be replaced.
The dosage rate monitoring instrument is arranged in the filter box 3 and used for measuring the dosage rate of dirt in the filter box 3. In this embodiment, the quantity of dose rate monitoring instrument is a plurality of, and a plurality of dose rate monitoring instruments are used for carrying out the dose rate monitoring to the waste liquid pipeline in the pipe filter in the filtering component, the filter core of dismantling, the pipe filter respectively.
When the dosage rate monitoring instrument measures that the dosage rate of the dirty blocks in the filter box 3 reaches a set value, the filter element of the pipeline filter needs to be replaced.
In addition, the corresponding solid waste treatment device and the corresponding waste liquid treatment device can be selected according to the dosage rate of the sewage blocks and the sewage water measured by the dosage rate monitoring instrument.
In this embodiment, the filter element has a filter mesh diameter of not more than 100 um.
Optionally, a tray is arranged at the lower end of the pipeline filter, and the replaced filter element is placed in the tray for draining.
In this embodiment, the decontamination device for the radioactive storage tank further comprises an air inlet unit, an air outlet unit and an air curtain 4, wherein the air curtain 4 is covered on a through hole of the radioactive storage tank for lifting the high-pressure water nozzle and the robot 1, and is used for shielding radiation in the radioactive storage tank. In this embodiment, the gas curtain 4 is an assembled gas curtain, and is reused after being simply decontaminated.
In this embodiment, the gas inlet unit includes a gas source and a gas source pipe, one end of the gas source pipe is connected with the gas source, and the other end of the gas source pipe extends into the gas tent 4 and is used for introducing gas into the radioactive storage tank.
The exhaust unit is arranged outside the radioactive storage tank and is used for pumping the gas introduced into the radioactive storage tank, filtering the gas and then discharging the filtered gas.
Wherein, the exhaust unit can be realized by utilizing the original exhaust device in the radioactive storage tank.
In addition, other channels such as an inner manhole, a washing hole, an inspection hole and the like of the radioactive storage tank can be used as the connecting channel of the air exhaust unit by the air exhaust unit, so that the air exhaust strength in the radioactive storage tank is enhanced.
In this embodiment, the high pressure water unit includes a high pressure water source and a high pressure water pipe, the high pressure water source is disposed outside the gas curtain 4, and both ends of the high pressure water pipe are respectively connected with the high pressure water source and the high pressure water nozzle for delivering high pressure water into the high pressure water nozzle. In the embodiment, the water outlet pressure of the high-pressure water source can be adjusted, wherein the highest water pressure can reach 300Mpa, and the maximum flow can reach 50L/min.
In this embodiment, radioactive storage tank decontamination plant still includes the handling unit, and the handling unit includes electric block 5, and electric block 5 is used for handling robot 1, high-pressure water shower nozzle and is used for blockking up the through-hole stopper 2 of through-hole.
In this embodiment, radioactive storage tank decontamination plant can directly wash radioactive storage tank inside, clears away the inside filth of radioactive storage tank, and simple structure, convenient operation.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A method of decontaminating a radioactive storage tank, comprising the steps of:
hoisting the high-pressure water spray heads of the robot and the high-pressure water unit into the radioactive storage tank through the through holes on the radioactive storage tank;
the robot carries a high-pressure water spray head to move in the radioactive storage tank, and high-pressure water sprayed by the high-pressure water spray head decontaminates the interior of the radioactive storage tank;
discharging the dirt generated in the decontamination process out of the radioactive storage tank.
2. The method of decontaminating a radioactive storage tank according to claim 1,
the robot carries the high-pressure water shower nozzle to move in the radioactivity basin to through the inside decontamination of high-pressure water that the high-pressure water shower nozzle spun to radioactivity basin specifically is:
the robot carries the high-pressure water spray head to crawl from the bottom plate of the radioactive storage tank to the side wall of the radioactive storage tank and then to the top plate of the radioactive storage tank, and then the top plate, the side wall and the bottom plate of the radioactive storage tank are sequentially decontaminated by high-pressure water sprayed by the high-pressure water spray head.
3. The method for decontaminating a radioactive storage tank according to claim 1, wherein discharging the contaminants generated during decontamination outside the radioactive storage tank is specifically:
pumping the dirt generated in the decontamination process out of the radioactive storage tank into a filtering assembly so as to separate dirt blocks from the sewage in the dirt;
sending the separated sewage to a corresponding waste liquid treatment device for treatment according to the radioactivity of the sewage;
and sending the separated dirt blocks to a corresponding solid waste treatment device for treatment according to the radioactivity of the dirt blocks.
4. The method of decontaminating a radioactive storage tank according to claim 1,
before the robot and the high-pressure water spray head are hoisted into the radioactive storage tank through the through hole on the radioactive storage tank, the method further comprises the following steps:
covering a gas curtain on the through hole of the radioactive storage tank for conveying gas into the radioactive storage tank;
and the number of the first and second groups,
and the radioactive storage tank is provided with an exhaust unit for pumping the gas in the radioactive storage tank, filtering and discharging the gas.
5. The method for decontaminating a radioactive storage tank, according to claim 4, further comprising, prior to hoisting the robot and the high pressure water jet into the radioactive storage tank through the through hole in the radioactive storage tank: and a lifting unit is arranged near the through holes of the lifting robot and the high-pressure water spray head and is arranged in the gas curtain.
6. A decontamination device for a radioactive storage tank is characterized by comprising a high-pressure water unit and a robot,
the high-pressure water unit comprises a high-pressure water spray head, and the high-pressure water spray head is used for providing high-pressure water;
the robot is used for driving the high-pressure water spray head to move in the radioactive storage tank, and high-pressure water sprayed by the high-pressure water spray head decontaminates the interior of the radioactive storage tank.
7. The radioactive tank decontamination device, according to claim 6, further comprising a dirt discharge unit, said dirt discharge unit comprising a filter assembly and a dirt pump,
the dirt pump is arranged in the radioactive storage tank and used for pumping dirt generated in the decontamination process into the filtering assembly;
the filtering component is arranged outside the radioactive storage tank and is used for separating dirt blocks in the dirt from the sewage.
8. A radioactive tank decontamination device according to claim 7, wherein said filter assembly comprises a filter box, a dose rate monitor meter and a differential pressure meter,
the filter tank is connected with the sewage pump and is used for separating sewage blocks from sewage in the sewage;
the differential pressure meter is arranged in the filter tank and is used for measuring the pressure difference of a filter in the filter tank;
the dosage rate monitoring instrument is arranged in the filter box and used for measuring the dosage rate of dirt in the filter box.
9. The radioactive tank decontamination device, according to claim 6, further comprising an air intake unit, an air exhaust unit and an air curtain,
the gas tent is covered on a through hole of a radioactive storage tank for lifting the high-pressure water spray head and the robot and is used for shielding radiation in the radioactive storage tank;
the air inlet unit comprises an air source and an air source pipe, one end of the air source pipe is connected with the air source, and the other end of the air source pipe extends into the air tent and is used for introducing air into the radioactive storage tank;
the exhaust unit is arranged outside the radioactive storage tank and is used for pumping the gas introduced into the radioactive storage tank, filtering the gas and then discharging the filtered gas.
10. The radioactive storage tank decontamination device according to any one of claims 6 to 9, further comprising a lifting unit including an electric hoist for lifting the robot, the high pressure water jet and a through-hole plug for plugging the through-hole.
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| CN202110705861.XA CN113245327A (en) | 2021-06-24 | 2021-06-24 | Decontamination method and device for radioactive storage tank |
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| US4817653A (en) * | 1988-01-22 | 1989-04-04 | Serv-Tech, Inc. | Tank cleaning, water washing robot |
| CN101402078A (en) * | 2008-11-07 | 2009-04-08 | 合肥通用机械研究院 | Complete equipment and process for derusting of ultra-high pressure water fluid jet wall-climb |
| CN102764750A (en) * | 2012-08-12 | 2012-11-07 | 周利坤 | Oil tank cleaning robot |
| CN104575649A (en) * | 2014-12-11 | 2015-04-29 | 中国核电工程有限公司 | Device for preventing radioactive combustible aerosol from overflowing |
| CN105215029A (en) * | 2015-11-17 | 2016-01-06 | 北京石油化工学院 | A kind of oil storage tank robot cleaning system and method |
| JP2018066625A (en) * | 2016-10-19 | 2018-04-26 | 株式会社東京エネシス | Device and method for cleaning radioactive contaminated material storage tank |
| CN108655135A (en) * | 2018-07-02 | 2018-10-16 | 洛阳圣瑞智能机器人有限公司 | Ship, petrochemical industry storage tank wall surface climb wall rust removing robot work system |
| CN111710456A (en) * | 2020-05-12 | 2020-09-25 | 中国核电工程有限公司 | Bottom mud withdrawing method and system for radioactive waste liquid storage tank |
| CN212143791U (en) * | 2020-05-14 | 2020-12-15 | 东北石油大学 | Storage tank wall cleaning robot |
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