阅读说明：本技术 一种放射性浆液倒空系统及方法 (Radioactive slurry emptying system and method ) 是由 王兴旺 刘郢 秦永泉 刘再彤 王宁 罗利杰 贡源 徐圣凯 于 2021-08-10 设计创作，主要内容包括：本发明提供一种放射性浆液倒空系统及方法,存放放射性浆液的存放贮槽位于一放化厂房内,该系统包括：潜液泵、倒空贮槽和屏蔽塞；所述倒空贮槽设于与放化厂房相邻的暂存厂房内,所述放化厂房的楼板上开设有检修孔,所述存放贮槽的倒空口延伸至检修孔内,所述屏蔽塞位于检修孔内,用于打开或关闭所述存放贮槽的倒空口,所述潜液泵位于存放贮槽中,其上连接有倒空管和电缆,所述倒空管依次穿过屏蔽塞、放化厂房的楼板,以及放化厂房和暂存厂房之间的隔墙后与倒空贮槽相连通；所述电缆先后穿过屏蔽塞和放化厂房的楼板后与供电设备电连接。本发明能够实现放射性浆液贮槽在事故以及退役等情况下的快速倒空,且满足中放废物操作要求。(The invention provides a radioactive slurry emptying system and a method, wherein a storage tank for storing radioactive slurry is positioned in a radiochemical factory building, and the system comprises: the device comprises an immersed pump, an emptying storage tank and a shielding plug; the emptying storage tank is arranged in a temporary storage workshop adjacent to the emptying workshop, an access hole is formed in a floor of the emptying workshop, an emptying port of the storage tank extends into the access hole, the shielding plug is positioned in the access hole and used for opening or closing the emptying port of the storage tank, the immersed pump is positioned in the storage tank and connected with an emptying pipe and a cable, and the emptying pipe sequentially penetrates through the shielding plug, the floor of the emptying workshop and a partition wall between the emptying workshop and the temporary storage workshop and then is communicated with the emptying storage tank; and the cable sequentially passes through the shielding plug and a floor slab of the discharge workshop and then is electrically connected with the power supply equipment. The invention can realize the quick emptying of the radioactive slurry storage tank under the conditions of accidents, retirement and the like, and meets the operation requirement of waste intermediate-level discharge.)

1. A radioactive slurry emptying system, wherein a storage tank (9) for storing radioactive slurry is located in a radiochemical factory (20), comprising: the submerged pump (12), the emptying storage tank (19) and the shielding plug (4);

the emptying storage tank (19) is arranged in a temporary storage workshop (23) adjacent to the emptying workshop (20),

an access hole (22) is formed in a floor slab (21) of the storage and chemical plant (20), an emptying port (8) of the storage tank (9) extends into the access hole (22), the shielding plug (4) is positioned in the access hole (22) and used for opening or closing the emptying port (8) of the storage tank (9),

the immersed pump (12) is positioned in the storage tank (9), an emptying pipe (7) and a cable (1) are connected to the immersed pump, and the emptying pipe (7) sequentially penetrates through the shielding plug (4), a floor (21) of the chemical plant (20) and a partition wall (24) between the chemical plant (20) and the temporary storage plant (23) and then is communicated with the emptying storage tank (19); the cable (1) sequentially penetrates through the shielding plug (4) and a floor (21) of the radiochemical factory building (20) and then is electrically connected with the power supply equipment.

2. Radioactive slurry emptying system according to claim 1, further comprising a driving device (11), said driving device (11) being provided on the floor (21) above the manhole (22),

the immersed pump (12) is further provided with a lifting rope (13), the lifting rope (13) penetrates through the shielding plug (4) and then is connected with the driving device (11), and the driving device (11) is used for retracting the lifting rope (13) so as to drive the immersed pump (12) to extend into the storage tank (9) or lift the immersed pump out of the storage tank (9).

3. Radioactive slurry emptying system according to claim 2, wherein the drive means (11) is further adapted to connect to the shield plug (4) and to drive the shield plug (4) up and down to open or close the emptying opening (8) of the storage tank (9).

4. A radioactive slurry emptying system according to claim 3,

the shielding plug (4) is formed by splicing two half plug parts, through grooves are formed in the end faces, opposite to each other, of the two half plug parts, the through grooves penetrate through the upper end face and the lower end face of the half plug parts, the through grooves in the two half plug parts correspond to each other and form through holes after being spliced, and therefore an emptying pipe (7), a cable (1) and a lifting rope (13) can penetrate through the through holes;

the driving device (11) is also used for driving the two half plug parts to approach each other to split and form the shielding plug (4) or to move away from each other to allow an immersed pump (12) to pass between the two half plug parts.

5. A radioactive slurry emptying system according to claim 4,

the emptying pipe (7) comprises a pipe front section (71) and a pipe rear section (72), one end of the pipe rear section (72) is connected with the emptying storage tank (19), the other end of the pipe rear section (72) sequentially penetrates through a partition wall (24) between the chemical plant (20) and the temporary storage plant (23), a floor (21) of the chemical plant (20) extends into the access hole (22), one end of the pipe front section (71) is connected with the immersed pump (12), and the other end of the pipe front section (71) penetrates through the shielding plug (4) and then is connected with one end of the pipe rear section (72) extending into the access hole (22);

cable (1) is including line anterior segment (11) and line back end (12), the one end and the power supply unit electricity of line back end (12) link to each other, and the other end stretches into in access hole (22) after passing floor (21) of putting chemical factory building (20), the one end and the immersed pump (12) electricity of line anterior segment (11) are connected, and the other end passes behind shield stopper (4) and stretches into the one end electricity in access hole (22) with line back end (12) and is connected.

6. Radioactive slurry emptying system according to claim 4, wherein there are four through holes, three of which are provided for the emptying tube (7), the cable (1) and the lifting rope (13) to pass through, and the other is provided for the washing hose or the sampling mechanism to pass through, or is used as a viewing window.

7. Radioactive slurry emptying system according to claim 5 or 6, further comprising a cover plate (3) and a gas curtain (10),

the cover plate (3) is arranged in the detection hole and is used for opening or closing an upper end opening of the detection hole;

the gas curtain (10) is arranged on the floor (21), and the driving device (11) is positioned in the gas curtain (10).

8. The radioactive slurry emptying system according to claim 5 or 6, wherein the floor (21) is embedded with a first sleeve (25) and a second sleeve (6), the first sleeve (25) extends from the upper end face of the floor (21) to the wall of the manhole (22) for passing through the cable (1), and the second sleeve (6) extends from the lower end face of the floor (21) to the wall of the manhole (22) for passing through the emptying pipe (7).

9. Radioactive slurry emptying system according to claim 5 or 6, wherein a lining (14) is embedded in the floor (21), the lining (14) is sleeved in the lower section of the manhole (22) and is fixedly connected with the emptying port (8) of the storage tank (9).

10. A method for radioactive slurry emptying using the system according to any one of claims 5-9, comprising:

connecting a front pipe section (71) and a rear pipe section (72) on the immersed pump (12) with one end of the rear pipe section (12) extending into the access hole (22) to form a emptying pipe (7), connecting a front line section (11) and a rear line section (12) on the immersed pump (12) with one end of the rear line section (12) extending into the access hole (22) to form a cable (1), connecting a lifting rope (13) on the immersed pump (12) with a driving device (11),

the driving device (11) is connected with the shielding plug (4) and drives the shielding plug (4) to move upwards so as to open the emptying port (8) of the storage tank (9), then drives two half plug parts of the shielding plug (4) to be away from each other, then lowers the lifting rope (13) so as to drive the immersed pump (12) and the emptying pipe (7) and the cable (1) thereon to penetrate through the space between the two half plug parts of the shielding plug (4) and then extend into the storage tank (9), then drives the two half plug parts of the shielding plug (4) to be close to each other so as to be spliced to form the shielding plug (4), and finally drives the shielding plug (4) to move downwards until the emptying port (8) of the storage tank (9) is closed,

the immersed pump (12) is started to pump the radioactive slurry in the storage tank (9) into the emptying tank (19) through the emptying pipe (7),

the driving device (11) is connected with the shielding plug (4) and drives the shielding plug (4) to move upwards so as to open the emptying port (8) of the storage tank (9), then two half plug parts of the shielding plug (4) are driven to be away from each other, then the lifting rope (13) is tightened so as to drive the immersed pump (12) to lift out from the storage tank (9) and then to pass through between the two half plug parts of the shielding plug (4), then the two half plug parts of the shielding plug (4) are driven to approach each other so as to be spliced to form the shielding plug (4), and finally the shielding plug (4) is driven to move downwards until the emptying port (8) of the storage tank (9) is closed,

the method comprises the steps of disconnecting a front pipe section (71) and a rear pipe section (72) on the immersed pump (12), disconnecting a front line section (11) and a rear line section (12) on the immersed pump (12), disconnecting a lifting rope (13) and a driving device (11) on the immersed pump (12), and finally cleaning the immersed pump (12) and storing the cleaned immersed pump in a shielding container.

Technical Field

The invention particularly relates to a radioactive slurry emptying system and a radioactive slurry emptying method.

Background

At present, most chemical operation processes of a nuclear fuel post-treatment plant are completed under a high-radioactivity condition, the radioactivity level is very high, in the operation process, active shielding of radioactive substances is required, the operation flow requirements of the radioactive substances are also required, and meanwhile, the problem that the maintenance and decommissioning process is simple and can always be a key concern in the nuclear fuel post-treatment engineering design is considered.

The mode such as air lift, steam jet pump and the RFD pump of maintenance-free is generally adopted to the feed liquid transport mode in the aftertreatment factory building, and above several kinds of material pouring modes all have certain drawback, for example can increase tail gas handling capacity, steam dilution increase waste liquid volume etc. do not have a means of empting fast at present to the well feed liquid of putting of medium-and-large-scale storage tank material pouring, especially when the storage tank appears revealing when the accident operating mode such as, need empty fast to the storage tank.

In addition, when equipment broke down and follow-up factory building retired in process of production, personnel can not directly get into the equipment room and maintain or dismantle, need empty and wash the decontamination with whole equipment room and the indoor equipment of equipment, and after the decontamination reached certain level, personnel could take apart the apron, go into to overhaul or dismantle. Because the steam jet pump is generally arranged in the large storage tank equipment for partially storing and discharging the slurry, the size of the slurry residue at the bottom of the storage tank is increased due to long-term storage, the steam jet pump is easy to block, and the steam jet pump cannot be used for emptying at the moment. Even if the steam jet pump can be used for emptying, when a large-capacity storage tank (the volume is more than 100 cubic meters) is emptied, the maximum flow rate of the steam jet pump is about 5 cubic meters per hour at present, and the maximum flow rate can be about 20 cubic meters. It is important to achieve rapid emptying of such tanks in the event of accidents, decommissioning, etc.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art, provides a radioactive slurry emptying system to realize the quick emptying of a radioactive slurry storage tank under the conditions of accidents, decommissioning and the like, and correspondingly provides a method for quickly emptying radioactive slurry by using the system.

The technical scheme adopted for solving the technical problem of the invention is as follows:

a radioactive slurry emptying system, wherein a storage tank for storing radioactive slurry is positioned in a radiochemical factory, the system comprising: the device comprises an immersed pump, an emptying storage tank and a shielding plug;

the emptying storage tank is arranged in a temporary storage workshop adjacent to the emptying workshop,

the floor of the storage and chemical plant is provided with an access hole, the emptying port of the storage tank extends into the access hole, the shielding plug is positioned in the access hole and is used for opening or closing the emptying port of the storage tank,

the immersed pump is positioned in the storage tank, and is connected with an emptying pipe and a cable, and the emptying pipe sequentially passes through the shielding plug, a floor slab of the emptying plant and a partition wall between the emptying plant and the temporary storage plant and is communicated with the emptying tank; and the cable sequentially passes through the shielding plug and a floor slab of the discharge workshop and then is electrically connected with the power supply equipment.

Optionally, the device also comprises a driving device which is arranged on the floor and is positioned above the manhole,

the immersed pump is further provided with a lifting rope, the lifting rope penetrates through the shielding plug and then is connected with a driving device, and the driving device is used for retracting the lifting rope so as to drive the immersed pump to extend into the storage tank or lift the immersed pump out of the storage tank.

Optionally, the driving device is further used for being connected with the shielding plug and driving the shielding plug to move up and down so as to open or close the emptying port of the storage tank.

Optionally, the shielding plug is formed by splicing two half plug portions, through grooves are formed in the end faces, opposite to each other, of the two half plug portions, the through grooves penetrate through the upper end face and the lower end face of the half plug portions, the through grooves in the two half plug portions correspond to each other and form through holes after being spliced, so that empty pipes, cables and lifting ropes can penetrate through the through holes;

the drive means is also adapted to drive the two half plug portions towards each other to split the shield plug or away from each other for passage of an immersed pump therebetween.

Optionally, the emptying pipe comprises a pipe front section and a pipe rear section, one end of the pipe rear section is connected with the emptying storage tank, the other end of the pipe rear section successively passes through a partition wall between the emptying factory building and the temporary storage factory building and extends into the manhole after passing through a floor slab of the emptying factory building, one end of the pipe front section is connected with the immersed pump, and the other end of the pipe rear section extends into the manhole after passing through the shielding plug;

the cable comprises a front line section and a rear line section, one end of the rear line section is electrically connected with the power supply equipment, the other end of the rear line section penetrates through a floor slab of the radiochemical factory building and then extends into the access hole, one end of the front line section is electrically connected with the immersed pump, and the other end of the front line section penetrates through the shielding plug and then is electrically connected with one end of the rear line section extending into the access hole.

Optionally, the through holes are provided with four, three of the through holes are respectively used for the empty pipe, the cable and the lifting rope to pass through, and the other one is used for the washing hose or the sampling mechanism to pass through, or used as an observation window.

Optionally, a cover plate and a gas curtain are also included,

the cover plate is arranged in the detection hole and used for opening or closing an upper end opening of the detection hole;

the gas curtain is arranged on the floor slab, and the driving device is positioned in the gas curtain.

Optionally, a first sleeve and a second sleeve are pre-buried in the floor slab, the first sleeve extends from the upper end face of the floor slab to the hole wall of the manhole and is used for a cable to pass through, and the second sleeve extends from the lower end face of the floor slab to the hole wall of the manhole and is used for an emptying pipe to pass through.

Optionally, a bushing is embedded in the floor slab, and the bushing is sleeved in the lower section of the manhole and fixedly connected with an emptying port of the storage tank.

The invention also provides a method for emptying radioactive slurry by using the system, which comprises the following steps:

connecting the front pipe section and the rear pipe section of the immersed pump with each other to form an emptying pipe, connecting the front line section and the rear line section of the immersed pump with each other to form a cable, connecting the lifting rope on the immersed pump with the driving device,

the driving device is connected with the shielding plug and drives the shielding plug to move upwards so as to open the emptying port of the storage tank, then drives the two half plug parts of the shielding plug to be away from each other, then lowers the lifting rope so as to drive the immersed pump and the emptying pipe and the cable on the immersed pump to penetrate through the two half plug parts of the shielding plug and extend into the storage tank, then drives the two half plug parts of the shielding plug to be close to each other so as to form the shielding plug in a splicing manner, and finally drives the shielding plug to move downwards until the emptying port of the storage tank is closed,

starting the immersed pump to pump the radioactive slurry in the storage tank into the emptying storage tank through the emptying pipe,

the driving device is connected with the shielding plug and drives the shielding plug to move upwards so as to open the emptying port of the storage tank, then the two half plug parts of the shielding plug are driven to be away from each other, then the lifting rope is tightened so as to drive the immersed pump to be lifted out of the storage tank and then to pass through the space between the two half plug parts of the shielding plug, then the two half plug parts of the shielding plug are driven to approach each other so as to be spliced to form the shielding plug, and finally the shielding plug is driven to move downwards until the emptying port of the storage tank is closed,

the front pipe section and the rear pipe section on the immersed pump are disconnected, the front line section and the rear line section on the immersed pump are disconnected, the lifting rope on the immersed pump is disconnected with the driving device, and finally the immersed pump is cleaned and stored in a shielding container.

In the invention, when a large storage tank for containing medium-sized slurry in an equipment room needs to be overhauled or retired, the shielding plug of the emptying port at the top of the storage tank can be opened, the large storage tank is connected with the emptying storage tank in an adjacent factory building in advance, an immersed pump electrically connected with power supply equipment is placed at the bottom of the storage tank through the emptying port, and after the immersed pump supplies power, the slurry in the storage tank can be pumped into the emptying storage tank in the adjacent equipment room, so that the large storage tank for containing medium-sized slurry is quickly emptied under the conditions of accidents, retirement and the like, and the tail gas treatment amount and the waste liquid amount are greatly reduced while the emptying efficiency is improved.

Drawings

Fig. 1 is a schematic structural view of a radioactive slurry emptying system provided in embodiment 1 of the present invention when not in use;

fig. 2 is a schematic structural diagram of a radioactive slurry emptying system provided in embodiment 1 of the present invention in use;

FIG. 3 is a schematic structural diagram of a shield plug interface;

fig. 4 is a schematic cross-sectional view of the shield plug.

In the figure: 1. a cable; 2. a cable bushing; 3. a cover plate; 4. a plug; 5. a cable joint; 6. a second sleeve; 7. emptying the pipe; 8. emptying the opening; 9. a storage tank; 10. a gas tent; 11. a drive device; 12. an immersed pump; 13. a lifting hinge; 14. a bushing; 15. flushing the sampling hole; 16. a cable hole; 17. a hinge hole; 18. a waste liquid hole; 19. emptying the storage tank; 20. placing a chemical plant; 21. a floor slab; 22. an access hole; 23. temporarily storing the plant; 24. a partition wall; 25. a first sleeve; 26. a negative pressure and air exchange device; 27. and (5) steel cladding.

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.

In the description of the present invention, it should be noted that the indication of orientation or positional relationship, such as "on" or the like, is based on the orientation or positional relationship shown in the drawings, and is only for convenience and simplicity of description, and does not indicate or imply that the device or element referred to must be provided with a specific orientation, constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected," "disposed," "mounted," "fixed," and the like are to be construed broadly, e.g., as being fixedly or removably connected, or integrally connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.

A radioactive slurry emptying system, wherein a storage tank for storing radioactive slurry is positioned in a radiochemical factory, the system comprising: the device comprises an immersed pump, an emptying storage tank and a shielding plug;

the emptying storage tank is arranged in a temporary storage workshop adjacent to the emptying workshop,

the floor of the storage and chemical plant is provided with an access hole, the emptying port of the storage tank extends into the access hole, the shielding plug is positioned in the access hole and is used for opening or closing the emptying port of the storage tank,

the immersed pump is positioned in the storage tank, and is connected with an emptying pipe and a cable, and the emptying pipe sequentially passes through the shielding plug, a floor slab of the emptying plant and a partition wall between the emptying plant and the temporary storage plant and is communicated with the emptying tank; and the cable sequentially passes through the shielding plug and a floor slab of the discharge workshop and then is electrically connected with the power supply equipment.

The invention also provides a method for emptying radioactive slurry by using the system, which comprises the following steps:

connecting the front pipe section and the rear pipe section of the immersed pump with each other to form an emptying pipe, connecting the front line section and the rear line section of the immersed pump with each other to form a cable, connecting the lifting rope on the immersed pump with the driving device,

the driving device is connected with the shielding plug and drives the shielding plug to move upwards so as to open the emptying port of the storage tank, then drives the two half plug parts of the shielding plug to be away from each other, then lowers the lifting rope so as to drive the immersed pump and the emptying pipe and the cable on the immersed pump to penetrate through the two half plug parts of the shielding plug and extend into the storage tank, then drives the two half plug parts of the shielding plug to be close to each other so as to form the shielding plug in a splicing manner, and finally drives the shielding plug to move downwards until the emptying port of the storage tank is closed,

starting the immersed pump to pump the radioactive slurry in the storage tank into the emptying storage tank through the emptying pipe,

the driving device is connected with the shielding plug and drives the shielding plug to move upwards so as to open the emptying port of the storage tank, then the two half plug parts of the shielding plug are driven to be away from each other, then the lifting rope is tightened so as to drive the immersed pump to be lifted out of the storage tank and then to pass through the space between the two half plug parts of the shielding plug, then the two half plug parts of the shielding plug are driven to approach each other so as to be spliced to form the shielding plug, and finally the shielding plug is driven to move downwards until the emptying port of the storage tank is closed,

the front pipe section and the rear pipe section on the immersed pump are disconnected, the front line section and the rear line section on the immersed pump are disconnected, the lifting rope on the immersed pump is disconnected with the driving device, and finally the immersed pump is cleaned and stored in a shielding container.

Example 1:

as shown in fig. 1 and 2, the present embodiment provides a radioactive slurry emptying system, in which a storage tank 9 for storing radioactive slurry is located in a discharge factory 20, the emptying system comprising: the immersed pump 12, the emptying storage tank 19 and the shielding plug 4;

the emptying storage tank 19 is arranged in a temporary storage factory 23 adjacent to the emptying factory 20,

an access hole 22 is arranged on a floor 21 of the storage factory building 20, an emptying port 8 of the storage tank 9 extends into the access hole 22, the shielding plug 4 is positioned in the access hole 22 and is used for opening or closing the emptying port 8 of the storage tank 9,

the immersed pump 12 is positioned in the storage tank 9, a emptying pipe 7 and a cable 1 are connected to the immersed pump, and the emptying pipe 7 is communicated with the emptying tank 19 after sequentially passing through the shielding plug 4, a floor 21 of the emptying plant 20 and a partition wall 24 between the emptying plant 20 and the temporary storage plant 23; the cable 1 passes through the shielding plug 4 and the floor 21 of the discharge factory building 20 in sequence and then is electrically connected with the power supply equipment.

From this, when the large-scale storage tank 9 of putting thick liquid in holding in the equipment room needs overhaul or retire, can open the emptying mouth shield plug 4 at storage tank top, will link to each other with the emptying storage tank 19 in the adjacent factory building in advance, and put into the storage tank bottom through emptying mouth 8 with the immersed pump 12 that the power supply unit electricity is even, after the immersed pump 12 supplies power, can be with the thick liquid suction in the storage tank in the emptying storage tank 19 in the adjacent equipment room, thereby realize the quick emptying under the circumstances such as accident and retirement of the large-scale storage tank of putting thick liquid in this kind, when improving emptying efficiency, tail gas treatment capacity, waste liquid volume greatly reduced.

In the embodiment, the device further comprises a driving device 11, the driving device 11 is arranged on the floor slab 21 and is positioned above the access hole 22,

the immersed pump 12 is also provided with a lifting rope 13, the lifting rope 13 passes through the shielding plug 4 and then is connected with the driving device 11, and the driving device 11 is used for retracting and releasing the lifting rope 13 so as to drive the immersed pump 12 to extend into the storage tank 9 or lift the immersed pump 12 out of the storage tank 9.

By additionally arranging the driving device 11, the automatic lifting of the immersed pump 12 is realized, so that the immersed pump 12 automatically extends into the storage tank 9 or is automatically lifted out of the storage tank 9, and the radioactive irradiation of radioactive substances in the storage tank 9 on operators due to the shielding plug 4 opening during the preparation period before emptying can be reduced.

In this embodiment, the driving device 11 is also used to connect with the shield plug 4 and drive the shield plug 4 to move up and down to open or close the emptying port 8 of the storage tank 9.

Therefore, radioactive irradiation to operators caused by radioactive substance diffusion in the storage tank 9 during opening or lowering of the shield plug 4 can be reduced.

The integrated driving device 11 of the hoisting mechanism and the lifting manipulator can be adopted, the hoisting mechanism is used for realizing automatic lifting or submerged pump 12 placement, and the lifting manipulator is used for realizing grabbing and lifting of the shielding plug 4.

In the present embodiment, the first and second electrodes are,

the shielding plug 4 is formed by splicing two half plug parts, through grooves are formed in the end faces, opposite to each other, of the two half plug parts, the through grooves penetrate through the upper end face and the lower end face of the half plug parts, the through grooves in the two half plug parts correspond to each other and form through holes after being spliced, and therefore the emptying pipe 7, the cable 1 and the lifting rope 13 can penetrate through the through holes;

the drive means 11 is also used to drive the two half-plug portions towards each other to split the shield plug 4 or away from each other for the submersible pump 12 to pass between them.

The telescopic function of the lifting manipulator relative to the driving device body can be given by the telescopic cylinder, so that the two half plug parts are close to or far away from each other.

Therefore, before the shielding plug 4 is opened, after an operator finishes the connection between the driving device 11 and the immersed pump 12, the previous preparation work of taking out the shielding plug 4, taking out and opening the shielding plug 4, putting down the immersed pump 12, closing the shielding plug 4 and closing the emptying port 8 by the shielding plug 4 can be automatically finished through the driving device 11, at the moment, the storage tank 9 is in a shielding state, the immersed pump 12 does not have the condition that radioactive rays penetrate through a floor slab and aerosol diffuses during the work, after the immersed pump 12 pumps radioactive slurry in the storage tank 9 into the emptying tank 19, the later work of taking out the shielding plug 4, opening the shielding plug 4, pulling out the immersed pump 12, closing the shielding plug 4 and closing the emptying port 8 by the shielding plug 4 can be automatically finished through the driving device 11, so that the automatic operation of the opening process and the operation after the opening of the shielding plug 4 can be realized, and the personnel can be prevented from being in close contact with radioactive waste liquid, therefore, the radioactive irradiation of the radioactive substance in the storage tank 9 to the operator can be reduced to the maximum extent, and the requirements of the operation process of the radioactive substance are met.

Can adopt steel bushing to add the bilayer structure of inside packing and the same concrete of floor material at shield stopper 4, can adjust according to the use occasion of difference, adopt the concrete to fill both can guarantee the shielding effect, can also reduce cost.

In the present embodiment, the first and second electrodes are,

the emptying pipe 7 comprises a pipe front section 71 and a pipe rear section 72, one end of the pipe rear section 72 is connected with the emptying storage tank 19, the other end of the pipe rear section 72 successively passes through a partition wall 24 between the chemical plant 20 and the temporary storage plant 23 and a floor slab 21 of the chemical plant 20 and then extends into the access hole 22, one end of the pipe front section 71 is connected with the immersed pump 12, and the other end of the pipe rear section 72 extends into the access hole 22 after passing through the shielding plug 4;

cable 1 includes line anterior segment 11 and line back end 12, and the one end of line back end 12 links to each other with the power supply unit electricity, and in the other end stretched into access hole 22 after passing floor 21 of putting chemical factory building 20, the one end and the immersed pump 12 electricity of line anterior segment 11 were connected, and the other end passes behind the shield stopper 4 and stretches into the one end electricity in the access hole 22 with line back end 12 and is connected.

When the emptying system is not used, the cable joint 5 of the rear line section 12 and the interface of the rear pipe section 72 are both left on the hole wall of the manhole, so that the emptying system is convenient to install with the immersed pump 12.

In this embodiment, four through holes are provided, three of which are respectively used for the emptying tube 7, the cable 1 and the lifting rope 13 to pass through, respectively are a waste liquid hole 18, a cable hole 16 and a hinge hole 17, and the other is a flushing sampling hole 15 used for a washing hose or a sampling detection mechanism to pass through, or used as an observation window.

In the embodiment, the gas curtain also comprises a cover plate 3 and a gas curtain 10,

the cover plate 3 is arranged in the detection hole and is used for opening or closing an upper end opening of the detection hole;

the air curtain 10 is arranged on the floor 21, and the driving device 11 is positioned in the air curtain 10.

Depending on the radioactivity level, the cover plate 3 may be filled with concrete or other shielding material of different materials.

When the emptying system is not used, the double-layer shielding structure consisting of the equipment chamber cover plate 3 and the emptying port shielding plug 4 is adopted, when the emptying system is used, the double-layer shielding structure consisting of the air curtain 10 and the emptying port shielding plug 4 is adopted, the air curtain 10 is connected with the negative pressure and the air exchange device, and the radioactive rays can be effectively prevented from penetrating out of the floor slab and being diffused by aerosol.

After the cover plate of the equipment chamber is opened, the maintenance environment still meets the requirement of maintenance dosage.

In this embodiment, the floor slab 21 is embedded with the first sleeve 25 and the second sleeve 6, the first sleeve 25 extends from the upper end face of the floor slab 21 to the hole wall of the manhole 22 for the cable 1 to pass through, and the second sleeve 6 extends from the lower end face of the floor slab 21 to the hole wall of the manhole 22 for the hollow pipe 7 to pass through.

The cable 1 passes through the pre-buried arc first sleeve pipe 25 in the floor and links to each other with power supply unit, and the pipe of empting 7 passes through the pre-buried arc second sleeve pipe 6 in the floor and links to each other with the storage tank of empting 19 in the adjacent factory building, can further prevent that radioactive ray from wearing out the floor to and the aerosol diffusion.

In this embodiment, the floor 21 is embedded with a bushing 14, and the bushing 14 is sleeved in the lower section of the manhole 22 and is fixedly connected with the emptying port 8 of the storage tank 9.

The bush 14 is coaxial with the emptying port 8 of the storage tank 9 and has the same inner diameter, and the bush and the emptying port are connected through welding, so that the immersed pump 12 can conveniently enter the storage tank.

The bush 14 and the steel clad surface 27 in the equipment room are made of the same material and are connected in a welding mode, sealing materials are filled between the shielding plug 4 and the bush 14, and the sealing materials are compressed to ensure that the atmosphere in the equipment room does not leak.

Example 2:

this example provides a method for radioactive slurry emptying using the system of example 1, comprising:

the cover plate 2 is opened, the driving device 11 and the air curtain 10 are fixed above the shielding plug 4,

connecting the front pipe section 71 and the rear pipe section 72 of the immersed pump 12 with the end extending into the access hole 22 to form an emptying pipe 7, connecting the front line section 11 and the rear line section 12 of the immersed pump 12 with the end extending into the access hole 22 to form a cable 1, connecting the lifting rope 13 on the immersed pump 12 with the driving device 11,

the driving device 11 is firstly connected with the shielding plug 4 and drives the shielding plug 4 to move upwards so as to open the emptying port 8 of the storage tank 9, then drives the two half plug parts of the shielding plug 4 to be away from each other, then lowers the lifting rope 13 so as to drive the immersed pump 12 and the emptying pipe 7 and the cable 1 thereon to penetrate between the two half plug parts of the shielding plug 4 and then extend into the storage tank 9, then drives the two half plug parts of the shielding plug 4 to be close to each other so as to be spliced to form the shielding plug 4, and finally drives the shielding plug 4 to move downwards until the emptying port 8 of the storage tank 9 is closed,

the immersed pump 12 is turned on to draw the radioactive slurry in the storage tank 9 into the emptying tank 19 through the emptying pipe 7,

the driving device 11 is connected with the shield plug 4 and drives the shield plug 4 to move upwards so as to open the emptying port 8 of the storage tank 9, then drives the two half plug parts of the shield plug 4 to be away from each other, then tightens up the lifting rope 13 so as to drive the immersed pump 12 to pass through between the two half plug parts of the shield plug 4 after being lifted out of the storage tank 9, then drives the two half plug parts of the shield plug 4 to be close to each other so as to be spliced to form the shield plug 4, and finally drives the shield plug 4 to move downwards until the emptying port 8 of the storage tank 9 is closed,

the front pipe section 71 and the rear pipe section 72 on the immersed pump 12 are disconnected, the front line section 11 and the rear line section 12 on the immersed pump 12 are disconnected, the lifting rope 13 on the immersed pump 12 is disconnected with the driving device 11, and finally the immersed pump 12 is cleaned and stored in a shielding container.

In this embodiment, when the immersed pump 12 is lifted out from the storage tank 9 to the emptying port, the washing hose enters the storage tank 9 through the washing sampling hole on the shielding plug 4 to perform the preliminary cleaning of the immersed pump 12, so as to reduce the irradiation of the radioactive waste liquid on the outer surface of the immersed pump 12 to the operator.

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.