CN215466782U - Decontamination plant of spent fuel transport container - Google Patents
Decontamination plant of spent fuel transport container Download PDFInfo
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- CN215466782U CN215466782U CN202121402122.5U CN202121402122U CN215466782U CN 215466782 U CN215466782 U CN 215466782U CN 202121402122 U CN202121402122 U CN 202121402122U CN 215466782 U CN215466782 U CN 215466782U
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Abstract
The utility model relates to the technical field of radioactive waste treatment, in particular to a decontamination device for a spent fuel transport container, which comprises a cleaning pool, a barrel and a top cover, wherein the top cover seals the barrel, a high-pressure spray head and an annular water pipe are arranged in the barrel, the high-pressure spray head is communicated with the annular water pipe, the annular water pipe is connected with a driving mechanism, and the driving mechanism drives the annular water pipe to move along the length direction of the barrel. According to the utility model, the driving mechanism is arranged, and the driving mechanism can drive the annular water pipe and the spray head to move up and down in the barrel, so that full-coverage automatic washing and decontamination of the transport container are realized, the residue of radioactive substances on the surface of the container is reduced, the automation level of decontamination is improved, operators do not need to approach the container during washing and decontamination, the short-distance operation time of the operators and the transport container is shortened, and the exposure dose of the operators is reduced.
Description
Technical Field
The utility model relates to the technical field of radioactive waste treatment, in particular to a decontamination device for a spent fuel transport container.
Background
After the spent fuel transport container of the nuclear power station is filled with spent fuel, the spent fuel transport container is soaked in a boric acid solution containing radioactivity for a long time, and the outer surface of the transport container needs to be cleaned and decontaminated before outward transportation, so that radioactive impurities and boric acid crystals on the outer surface of the container are removed.
The Guangdong nuclear power group limited company of China discloses a patent of 'a cleaning platform for a spent fuel transport container' with the publication number of CN201783494U, a cleaning platform is arranged in a cleaning pool, and a normal-pressure water pipe is held by a worker on the cleaning platform to wash the wall of the container.
The Chinese nuclear power research institute discloses a patent of 'a decontamination operation platform for a spent fuel transport container' with an authorization publication number of CN208495296U, and the container wall is cleaned by adopting a limited number of fixed high-pressure water high-pressure spray heads, so that radioactive impurities and boric acid crystals on the container wall cannot be effectively cleaned in actual use, and personnel are required to wipe the container in a short distance.
In two above patents, because the transport container surface radiation level is higher, the long-time closely operation of personnel, the exposure dose is great, for the protection personnel radiation safety, it is necessary to develop a degree of automation height, wash convenient and efficient spent fuel transport container decontamination plant.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a decontamination device for a spent fuel transport container, which solves the technical problems that the existing cleaning process of the spent fuel transport container is low in automation degree, requires operators to operate in a short distance for a long time, is large in irradiated dose, and is inconvenient and unclean in cleaning.
The utility model is realized by the following technical scheme: including wasing pond, barrel, top cap, the top cap seals the barrel, be equipped with high pressure nozzle, annular water pipe in the barrel, high pressure nozzle intercommunication annular water pipe, annular water piping connection actuating mechanism, actuating mechanism drives annular water pipe follows the length direction of barrel removes.
The driving mechanism comprises a motor, a belt wheel, a belt, a lead screw and a ball sleeve, wherein the belt is connected with the motor and the belt wheel, one end of the lead screw penetrates through a fixing plate and is sleeved inside the belt wheel, one end of the lead screw, which is far away from the belt wheel, is rotatably connected with another fixing plate fixed with the cylinder body, the ball sleeve is sleeved outside the lead screw in sliding fit with the lead screw, the annular water pipe is connected with the ball sleeve, and the motor is fixed on the side wall of the cylinder body.
The technical scheme is that a guide rail is further arranged on the side wall of the barrel, a sliding block is fixed on the annular water pipe, and the sliding block is in sliding fit with the guide rail.
Further, the driving mechanism and the guide rail are symmetrically arranged in two groups.
The annular water pipe is communicated with a booster air pump and a booster water pump which are arranged outside the cleaning pool.
The further scheme is that a radioactive contamination level measuring instrument is further arranged inside the cylinder body, and a telescopic measuring probe is arranged on the measuring instrument.
The further proposal is that a transportation container support is also arranged in the cylinder body and is fixed on the cleaning pool.
The washing device is characterized in that a water retaining ring is sleeved outside the barrel and fixed on the washing pool, and a floor drain is further arranged in the washing pool.
The washing tank is internally provided with a washing tank, and the washing tank is internally provided with a washing tank.
Further, the supporting platform is divided into two layers.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
(1) according to the utility model, by arranging the barrel, the annular water pipe, the high-pressure spray head and the driving mechanism, the driving mechanism can drive the annular water pipe and the spray head to move up and down in the barrel, so that full-coverage automatic washing and decontamination of the transport container are realized, the radioactive substance residues on the surface of the container are reduced, the automation level of decontamination is improved, operators do not need to approach during washing and decontamination, the short-distance operation time of the operators and the transport container is reduced, and the exposure dose of the operators is reduced.
(2) Through setting up the booster pump, can wash the back again and sweep the container surface with compressed air, reduced the residual water on container surface, avoid container handling in-process water to drip and cause ground pollution.
(3) Through setting up radioactive contamination level measurement appearance, the last measuring apparatu up-and-down motion of sweeping the completion, measures the radioactivity level on container surface, according to the testing result, decides whether to continue to wash or stop washing, improves degree of automation, has reduced personnel and transport container operating time closely, has reduced the operation personnel dose of being irradiated. The operation platform can be used for the up-and-down operation of the working personnel.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principles of the utility model.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a top view of the internal structure of the cartridge of the present invention.
Fig. 3 is an enlarged view of the driving mechanism of the present invention.
In the drawings: 1 cleaning pool, 2 cylinder bodies, 3 top covers, 4 high-pressure nozzles, 5 annular water pipes, 6 driving mechanisms, 601 motors, 602 belt wheels, 603 belts, 604 lead screws, 605 ball sleeves, 606 fixing plates, 7 guide rails, 8 sliding blocks, 9 booster pumps, 10 booster pumps, 11 measuring instruments, 12 transport container supports, 13 water retaining rings, 14 working platforms, 141 supporting frames, 142 supporting tables, 143 elevator and 15 floor drains.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
the utility model provides a decontamination plant of spent fuel transportation container, is including wasing pond 1, barrel 2, top cap 3, washs pond 1 and is factory building fixed facilities, for concrete structure, and the steel clad can be laid on the surface, and top cap 3 seals barrel 2, and top cap 3 and barrel 2 are for can open-close type, and what specific open-close type structure cooperation adopted is the structure commonly used among the prior art, does not detailed herein again. Still be equipped with annular water pipe 5, high pressure nozzle 4 in the barrel 2, annular water pipe 5 locates inside the barrel 2, and encircles the inside wall setting of barrel 2. The high-pressure spray heads 4 are fixed on the annular water pipe 5 and communicated with the annular water pipe 5, a plurality of high-pressure spray heads 4 distributed along the periphery of the annular water pipe 5 in an annular array are arranged on the annular water pipe 5, and each high-pressure spray head 4 faces the direction of the transport container.
The annular water pipe 5 is connected with a driving mechanism 6, and the driving mechanism 6 drives the annular water pipe 5 to move along the length direction of the barrel 2. The driving mechanism 6 comprises a motor 601, a belt wheel 602, a belt 603, a lead screw 604 and a ball sleeve 605, wherein the belt 603 is respectively connected with the motor 601 and the belt wheel 602, one end of the lead screw 604 penetrates through one fixing plate 606 and is sleeved inside the belt wheel 602, the other end of the lead screw 604 is rotatably connected with the other fixing plate 606, and the lead screw 604 and the two fixing plates 606 are in a rotating connection relationship. Two fixed plates 606 are fixed on the side wall of the cylinder 2, a ball sleeve 605 in sliding fit with the lead screw 604 is sleeved outside the lead screw 604, the annular water pipe 5 is fixedly connected with the ball sleeve 605, the motor 601 and the belt wheel 602 are fixed on the side wall of the cylinder 2, and one end of the lead screw 604 far away from the belt wheel 602 is fixed on the cylinder 2 through a connecting block. The motor 601 is connected with an external power supply.
Still be equipped with guide rail 7 on the lateral wall of barrel 2, guide rail 7 sets up along the length direction of barrel 2 is vertical, is fixed with slider 8 on the annular water pipe 5, slider 8 and guide rail 7 sliding fit. In order to sufficiently support the annular water pipe 5, two driving mechanisms 6 are symmetrically arranged with respect to the guide rail, and each driving mechanism 6 is arranged with respect to the guide rail at intervals, but more driving mechanisms, such as three driving mechanisms, four driving mechanisms, etc., may be arranged as required.
Example 2:
on the basis of embodiment 1, the further scheme is that the annular water pipe 5 is communicated with a pressurizing air pump 9 and a pressurizing water pump 10 which are arranged outside the cleaning pool 1, the pressurizing water pump 10 provides power to inject water into the annular water pipe 5, and the pressurizing air pump 9 can inject high-pressure gas into the annular water pipe 5 and spray the high-pressure gas into the transportation container through the high-pressure spray head 4. The booster water pump 10 and the booster air pump 9 are commercially available and are known in the art and will not be described in detail here.
The annular water pipe 5 is provided with a radioactive contamination level measuring instrument 11, the measuring instrument 11 is provided with a telescopic measuring probe, the measuring probe is hidden inside the measuring instrument 11 and sealed when cleaning is carried out, and after cleaning is completed, the measuring probe extends out to the outer surface of the transport container to carry out radioactive contamination measurement. The measuring instrument 11 is commercially available, and its specific structure, operation principle, and matching manner of the telescopic probe and the measuring instrument 11 are known technologies, and will not be described in detail herein.
Still be equipped with transportation container support 12 in the barrel 2, transportation container support 12 symmetry sets up two, and all fixes on wasing pond 1.
The outside cover of barrel 2 is equipped with water retaining ring 13, and water retaining ring 13 is fixed on wasing pond 1, avoids wasing water and flows wantonly, washs the bottom in pond 1 and still is equipped with floor drain 15.
The cleaning pool 1 is also internally fixed with an operation platform 14, the operation platform 14 is composed of a support frame 141, support platforms 142 and a ladder 143, the ladder 143 is used as an upper channel and a lower channel for workers, each support platform 142 is arranged outside the cylinder 2 in a surrounding way, and the support platforms 142 are divided into two layers. The worker may perform corresponding operations on the work platform 14 as desired. The specific structures and connection ways of the support frame 141, the support base 142 and the people ladder 143 are conventional in the art, and will not be described in detail.
When the device is used, a transport container is hoisted into the cylinder body 2 of the spent fuel transport container decontamination device, is located on the transport container support 12, and is covered with the top cover 3. Then starting the motor 601, wherein the motor 601 drives the belt wheel 602 to rotate by the belt 603, the belt wheel 602 drives the screw rod 604 to rotate, so that the ball sleeve 605 sleeved outside the screw rod 604 moves up and down along the screw rod 604 to drive the annular water pipe 5 and the spray head to move up and down along the guide rail 7, and after high-pressure water is introduced into the annular water pipe 5, full-coverage high-pressure washing of the transport container can be realized; after the flushing is finished, high-pressure air is introduced into the annular water pipe 5 to blow and sweep the residual water on the surface of the container up and down. And finally, the driving mechanism 6 drives the annular water pipe 5 and the measuring instrument 11 to move up and down, the surface shooting level of the transport container is measured, and whether to continue cleaning or stop cleaning is determined according to the detection result. And simultaneously the cleaning sewage flows out through the floor drain 15.
The above embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The decontamination device for the spent fuel transport container comprises a cleaning pool (1), a cylinder body (2) and a top cover (3), wherein the top cover (3) seals the cylinder body (2), and is characterized in that: be equipped with high pressure nozzle (4), annular water pipe (5) in barrel (2), high pressure nozzle (4) intercommunication annular water pipe (5), actuating mechanism (6) are connected in annular water pipe (5), actuating mechanism (6) drive annular water pipe (5) are followed the length direction of barrel (2) removes.
2. The decontamination device for a spent fuel transport container according to claim 1, wherein: the driving mechanism (6) comprises a motor (601), a belt wheel (602), a belt (603), a lead screw (604) and a ball sleeve (605), the belt (603) is connected with the motor (601) and the belt wheel (602), one end of the lead screw (604) penetrates through a fixing plate (606) and is sleeved inside the belt wheel (602), one end of the lead screw (604), far away from the belt wheel (602), is rotatably connected with another fixing plate (606) fixed with the barrel body (2), the ball sleeve (605) in sliding fit with the lead screw (604) is sleeved outside the lead screw (604), the annular water pipe (5) is connected with the ball sleeve (605), and the motor (601) is fixed on the side wall of the barrel body (2).
3. The decontamination device for a spent fuel transport container according to claim 1, wherein: still be equipped with guide rail (7) on the lateral wall of barrel (2), be fixed with slider (8) on annular water pipe (5), slider (8) with guide rail (7) sliding fit.
4. The decontamination device for a spent fuel transport container according to claim 3, wherein: the driving mechanisms (6) and the guide rails (7) are symmetrically arranged in two groups.
5. The decontamination device for a spent fuel transport container according to claim 1, wherein: the annular water pipe (5) is communicated with a booster air pump (9) and a booster water pump (10) which are arranged outside the cleaning pool (1).
6. The decontamination device for a spent fuel transport container according to claim 1, wherein: the annular water pipe (5) is further provided with a radioactive pollution level measuring instrument (11), and the measuring instrument (11) is provided with a telescopic measuring probe.
7. The decontamination device for a spent fuel transport container according to claim 1, wherein: still be equipped with transport container support (12) in barrel (2), transport container support (12) are fixed on wasing pond (1).
8. The decontamination device for a spent fuel transport container according to claim 1, wherein: the water-retaining ring (13) is sleeved outside the barrel (2), the water-retaining ring (13) is fixed on the cleaning pool (1), and a floor drain (15) is further arranged in the cleaning pool (1).
9. The decontamination device for a spent fuel transport container according to claim 1, wherein: an operation platform (14) is further fixed in the cleaning pool (1), the operation platform (14) is composed of a support frame (141), support platforms (142) and a ladder (143), and the support platforms (142) are arranged outside the barrel body (2) in a surrounding mode.
10. The decontamination device for a spent fuel transport container according to claim 9, wherein: the support table (142) is divided into two layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121402122.5U CN215466782U (en) | 2021-06-23 | 2021-06-23 | Decontamination plant of spent fuel transport container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121402122.5U CN215466782U (en) | 2021-06-23 | 2021-06-23 | Decontamination plant of spent fuel transport container |
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| Publication Number | Publication Date |
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| CN215466782U true CN215466782U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121402122.5U Active CN215466782U (en) | 2021-06-23 | 2021-06-23 | Decontamination plant of spent fuel transport container |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115889374A (en) * | 2022-12-01 | 2023-04-04 | 中核环保产业有限公司 | Special equipment for wiping and decontaminating surface of spent fuel dry-method storage container |
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2021
- 2021-06-23 CN CN202121402122.5U patent/CN215466782U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115889374A (en) * | 2022-12-01 | 2023-04-04 | 中核环保产业有限公司 | Special equipment for wiping and decontaminating surface of spent fuel dry-method storage container |
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