CN117287075A

CN117287075A - Preparation system of radioactive material

Info

Publication number: CN117287075A
Application number: CN202311219674.6A
Authority: CN
Inventors: 马敬; 陈勇; 王兴旺; 秦永泉; 牟勇胜; 董文杰; 贡源; 蔡梦琦; 宁邵辉; 吴明珍; 邓晶
Original assignee: China Nuclear Power Engineering Co Ltd
Current assignee: China Nuclear Power Engineering Co Ltd
Priority date: 2023-09-20
Filing date: 2023-09-20
Publication date: 2023-12-26

Abstract

The invention discloses a radioactive material preparation system, which comprises a container equipment chamber, a feeding pump chamber and a preparation equipment chamber, wherein the container equipment chamber is surrounded by a radiation-proof wall body, and the feeding pump chamber and the preparation equipment chamber are two independent rooms and are positioned on the side edge of the container equipment chamber; the container equipment chamber comprises a raw material feeder and a product receiver, the feeding pump chamber comprises a raw material feeding pump, the preparation equipment chamber comprises preparation equipment, the raw material feeder, the raw material feeding pump, the preparation equipment and the product receiver are communicated through a wall penetrating pipeline in sequence, the raw material feeding pump conveys raw materials in the raw material feeder to the preparation equipment for preparation, and products of the preparation equipment are conveyed to the product receiver. According to the method, the safety and convenience of maintenance are improved from the arrangement mode of the factory building and the equipment.

Description

Preparation system of radioactive material

Technical Field

The invention relates to the field of nuclear industrial production, in particular to a radioactive material preparation system.

Background

Currently, most chemical engineering operations in nuclear fuel reprocessing plants are performed under highly radioactive conditions. Therefore, in the nuclear fuel post-treatment engineering design, radioactive substances are effectively shielded, the requirement of an operation flow is met, and meanwhile, the problem that the maintenance process is safe, simple and feasible is always a major concern is considered.

For example, in nuclear fuel post-treatment engineering, pentavalent plutonium needs to be reduced to tetravalent by using tetravalent uranium, so that uranium-plutonium separation is performed, and electrolytic preparation of tetravalent uranium is a relatively simple and easy method at present. In the factory buildings of the prior art, equipment such as an electrolytic tank, a storage tank, a centrifugal pump and the like required by the preparation process are often arranged together in an equipment room. But in the production process, the failure rate of equipment such as the electric element in the electrolytic tank and the centrifugal pump is higher, and can not be directly maintained, and when overhauling, the whole equipment room and the equipment in the equipment room are required to be emptied, cleaned and decontaminated, and after decontaminated reaches a certain level, maintenance personnel can disassemble the cover plate to enter and overhaul. However, due to the difficulty in cleaning and decontaminating parts of the components, the components are difficult to clean, the radiation dose is seriously exceeded, and unnecessary health threats are caused to maintenance personnel. This arrangement of equipment has serious drawbacks in terms of operability, safety, and the like.

The prior art CN113460650A discloses an automatic feeding method of uranium converted materials, which is applied to an automatic feeding system of uranium converted materials, and comprises the following steps: assembling a sealed tank sleeve; conveying the sealed tank sleeve into a lifting elevator; lifting the sealing tank sleeve to the upper layer of the factory building; moving the sealed tank assembly to a feeding position; performing feeding operation; transferring the empty sealed can kit onto a translational conveyor; feeding a plurality of groups of sealing tank sets in sequence; transferring the sealed tank suite into a lifting elevator; the sealing tank suite is lowered to the lower layer of the factory building; conveying the sealed tank sleeve to a translation conveying device; all groups of sealed pot kits were recovered.

The prior art CN111599501A discloses a method for arranging a nuclear waste liquid system of a nuclear power plant nuclear auxiliary plant, which comprises a nuclear auxiliary plant of a nuclear island of the nuclear power plant provided with the nuclear waste liquid system, wherein the nuclear auxiliary plant comprises two underground layers and six above-ground layers. The nuclear auxiliary factory building can be divided into eight arrangement layers according to the elevation. The nuclear waste liquid in the nuclear auxiliary factory building is discharged after being treated due to different radioactive doses. The radiation subareas need to be accurately divided, and a protective layer and a protective area are arranged on the periphery of a working room in a high radiation area and are protected layer by layer so as to reduce the influence on the environment.

In the above technical scheme, the arrangement of a factory building and the arrangement of equipment pipelines aiming at a radioactive material preparation system are not found, so that the safety and convenience of maintenance are improved.

In view of the above technical problems, the present invention is particularly directed.

Disclosure of Invention

The invention mainly aims to provide a radioactive material preparation system which is used for solving the problem of poor equipment maintenance safety and convenience.

In order to achieve the above object, the present invention provides a radioactive material preparation system, which comprises a container device chamber, a feeding pump chamber and a preparation device chamber, wherein the container device chamber is surrounded by a radiation-proof wall, and the feeding pump chamber and the preparation device chamber are two independent rooms and are both positioned at the side edges of the container device chamber;

the container equipment chamber comprises a raw material feeder and a product receiver, the feeding pump chamber comprises a raw material feeding pump, the preparation equipment chamber comprises preparation equipment, the raw material feeder, the raw material feeding pump, the preparation equipment and the product receiver are communicated through a wall penetrating pipeline in sequence, the raw material feeding pump conveys raw materials in the raw material feeder to the preparation equipment for preparation, and products of the preparation equipment are conveyed to the product receiver.

Further, the position of the raw material feeder in the height direction is lower than the raw material feed pump, and the position of the raw material feed pump in the height direction is lower than the preparation apparatus.

Further, the raw material feeder and the product receiver are both fixed to the radiation-proof wall of the container apparatus chamber, and the product receiver is located higher than the raw material feed pump in the height direction.

Further, the preparation device chamber is located above the feed pump chamber.

Further, the wall penetrating pipeline comprises a conveying pipeline and a sealing sleeve, the sealing sleeve is sleeved on the conveying pipeline, and the conveying pipeline passes through the radiation-proof wall body through the sealing sleeve.

Further, the sealing sleeve comprises an arc sleeve, and the conveying pipeline at the inlet of the raw material feed pump penetrates into the container equipment chamber through the arc sleeve, and the conveying pipeline at the outlet of the raw material feed pump penetrates into the container equipment chamber through the arc sleeve.

Further, valves are arranged on the conveying pipelines at the outlet and the inlet of the raw material feed pump.

Further, the sealing sleeve further comprises a straight sleeve, the conveying pipeline at the inlet of the preparation equipment penetrates into the container equipment chamber through the straight sleeve, and the conveying pipeline at the outlet of the preparation equipment penetrates into the container equipment chamber through the straight sleeve.

Further, the container equipment chamber also comprises a product feeder, the product feeder is fixed on the radiation-proof wall body through a bracket, and the product feeder is communicated with the product receiver.

Further, the feeding pump chamber also comprises a product feeding pump, and the product feeder is communicated with the product feeding pump through a through-wall pipeline.

Further, the container equipment chamber also comprises a raw material receiver, the raw material receiver is fixed on the radiation-proof wall body through a bracket, and the raw material receiver is communicated with the raw material feeder.

Furthermore, the walls of the feeding pump chamber and the preparation equipment chamber, which are far away from the container equipment chamber, are provided with protective doors.

Further, the preparation system further comprises a lifting room and a maintenance room, wherein the lifting room is positioned on the outer side of the protective door, and the maintenance room is positioned above the preparation equipment room.

Further, the container equipment chamber also comprises a pouring device.

Further, the radiation-proof wall body includes a concrete wall surrounding the container apparatus chamber and a steel plate on an inner surface of the concrete wall.

By applying the technical scheme of the invention, at least the following beneficial effects are realized:

1. the preparation system of this application divides the room with radioactive feed liquid container, feed pump and preparation equipment according to radioactivity level, equipment maintenance mode and the difference of material conveying mode to arrange, will hold the container of raw materials and product and all concentrate in the container equipment room, prevent that the higher feed liquid container of radioactivity from causing adverse effect to the maintenance of pump valve and preparation equipment, improved the convenience and the security of maintenance.

2. According to the preparation system, through designing the radiation-proof wall body around the container equipment chamber and the sealed wall bushing is adopted for communication between the container equipment chamber and the feeding pump chamber and the preparation equipment chamber, the effective isolation between the container equipment chamber with higher radioactivity level and other workshops is ensured.

3. The preparation system of this application is through the high low arrangement mode of design raw materials feeder, raw materials feed pump and preparation equipment to design pipeline and arc sleeve's structure, the back is stopped to the feed liquid, has the radioactivity feed liquid of pipeline and pump the inside can flow back into the feed liquid container automatically, thereby reduces the stay of radioactivity feed liquid in pipeline and equipment, reduces the influence of radioactivity feed liquid to maintainer.

4. The preparation system of this application is fixed various feed liquor containers on container equipment room wall body through adopting the support, conveniently carries out the height configuration to different containers, also is convenient for wear the arrangement of wall pipeline, and container equipment room adopts the fall material mode of exempting from to maintain, has both reduced cost of maintenance, has reduced personnel again and has shone time.

5. The preparation system of this application sets up the guard gate through feeding pump room and preparation equipment room wall to and set up handling room and maintenance room, further improved the security and the efficiency of maintenance.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 illustrates a vertical cross-section of a manufacturing system of one embodiment;

FIG. 2 shows a cross-sectional view in the direction A-A in FIG. 1;

fig. 3 shows a sectional view in the direction B-B in fig. 1.

Wherein the above figures include the following reference numerals:

1. a container apparatus chamber; 2. a feed pump chamber; 3. preparing an equipment room; 4. a raw material feed pump; 5. a preparation device; 6. a raw material feeder; 7. a product receiver; 8. a delivery conduit; 9. an arc sleeve; 10. a straight sleeve; 11. a valve; 12. a product feeder; 13. a product feed pump; 14. a raw material receiver; 15. a bracket; 16. a protective door; 17. a lifting room; 18. an overhaul room; 19. a concrete wall; 20. and (3) a steel plate.

Detailed Description

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.

The invention is described in further detail below in connection with specific examples which are not to be construed as limiting the scope of the invention as claimed. The term "comprising" when used indicates the presence of a feature, but does not preclude the presence or addition of one or more other features; the positional or positional relationship indicated by the terms "transverse", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., are based on the positional or positional relationship shown in the drawings, are for convenience of description only, and are not indicative or implying that the apparatus or element in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention; furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description, unless clearly indicated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

Examples:

the invention provides a radioactive material preparation system, which mainly improves the maintenance safety and convenience in terms of the arrangement mode of plants and equipment. In this embodiment, a preparation system of uranium with tetravalent nature is taken as an example, and a technical scheme of the preparation system is described. In other embodiments, the preparation system may be used for preparing other radioactive materials, and those skilled in the art may adapt the preparation system according to the preparation flow characteristics of various radioactive materials, which are all within the scope of the present application.

As shown in fig. 1, the preparation system is provided in a factory building structure including a container apparatus chamber 1, a supply pump chamber 2, and a preparation apparatus chamber 3. The container apparatus chamber 1 is surrounded by a radiation-proof wall, and the supply pump chamber 2 and the preparation apparatus chamber 3 are two independent rooms, and are located on the side of the container apparatus chamber 1. Preferably, both the feed pump chamber 2 and the preparation device chamber 3 are also surrounded by radiation-protective walls.

The container device room 1 comprises a raw material feeder 6 and a product receiver 7, the feeding pump room 2 comprises a raw material feeding pump 4, the preparation device room 3 comprises a preparation device 5, the raw material feeder 6, the raw material feeding pump 4, the preparation device 5 and the product receiver 7 are communicated through a wall penetrating pipeline in sequence, the raw material feeding pump 4 conveys raw materials in the raw material feeder 6 to the preparation device 5 for preparation, and products of the preparation device 5 are conveyed to the product receiver 7.

Preferably, the container apparatus chamber 1 further includes a source material receiver 14 therein. The raw material feeder 6, the product receiver 7 and the raw material receiver 14 are all fixed on the radiation-proof wall body by a bracket 15, and the raw material receiver 14 is communicated with the raw material feeder 6.

As shown in fig. 3, the container apparatus chamber 1 preferably further includes a product feeder 12, the product feeder 12 being secured to the radiation-resistant wall by a bracket 15, the product feeder 12 being in communication with the product receiver 7.

In addition, the feeding pump chamber 2 also comprises a product feeding pump 13, and the product feeder 12 is communicated with the product feeding pump 13 through a wall-penetrating pipeline.

In the present embodiment, the container apparatus chamber 1 mainly accommodates various material liquid containers of the preparation system, including containers of raw materials and containers of products. Preferably, in this embodiment, the containers are all tanks, which are also referred to as "tanks", "storage tanks" or the like, and refer to devices for storing various liquid raw materials, semi-finished products or finished products. Due to the wide variety of storage media and the variety of storage conditions, there are different types of storage tanks. In this embodiment, the raw material feeder 6, the product receiver 7, the product feeder 12, and the raw material receiver 14 are all storage tanks. The containment device chamber 1 may also be referred to as a "sump device chamber".

The pump valve in the feed pump chamber 2 belongs to a movable part, has higher failure rate, needs personnel to directly maintain, is singly arranged between equipment, has only a pipeline inside, has no storage tank, has low source item, does not need emptying and cleaning, and is convenient to maintain.

The preparation system of this application divides the room with radioactive feed liquid container, feed pump and preparation equipment according to radioactivity level, equipment maintenance mode and the difference of material conveying mode to arrange, will hold the container of raw materials and product and all concentrate in the container equipment room, prevent that the higher feed liquid container of radioactivity from causing adverse effect to the maintenance of pump valve and preparation equipment, improved the convenience and the security of maintenance.

In the system for preparing tetravalent uranium in this embodiment, tetravalent uranium is prepared by electrolyzing an electrolyte, raw materials are the electrolyte, the preparation device 5 is an electrolytic tank, tetravalent uranium generated by electrolysis of the raw material electrolyte through the electrolytic tank flows out from an overflow port at the upper part of the electrolytic tank, enters a product receiver 7 of a container device chamber 1 through a wall-penetrating pipeline, is then conveyed to a product feeder 12, is used as a reducing agent after being seasoned, and is then conveyed to a corresponding room by a product feed pump 13 in a feed pump chamber 2.

In the present application, the position of the raw material feeder 6 in the height direction is lower than the raw material feed pump 4, the position of the raw material feed pump 4 in the height direction is lower than the preparation apparatus 5, and the position of the product receiver 7 in the height direction is higher than the raw material feed pump 4. The preparation system of this application is fixed various feed liquor containers on container equipment room wall body through adopting the support, conveniently carries out the height configuration to different containers, also is convenient for wear the arrangement of wall pipeline.

Preferably, as shown in fig. 1, the preparation device chamber 3 is disposed above the feed pump chamber 2. After the feed liquid stops conveying, the radioactive feed liquid in the pipeline and the pump can automatically flow back to the feed liquid container, so that the retention of the radioactive feed liquid in the pipeline and the equipment is reduced, and the influence of the radioactive feed liquid on maintenance personnel is reduced.

The wall penetrating pipeline comprises a conveying pipeline 8 and a sealing sleeve, the sealing sleeve is sleeved on the conveying pipeline 8, and the conveying pipeline 8 passes through the radiation-proof wall body through the sealing sleeve. According to the preparation system, through designing the radiation-proof wall body around the container equipment chamber and the sealed wall bushing is adopted for communication between the container equipment chamber and the feeding pump chamber and the preparation equipment chamber, the effective isolation between the container equipment chamber with higher radioactivity level and other workshops is ensured.

Specifically, the sealing sleeve comprises an arc sleeve 9, and a conveying pipeline 8 at the inlet of the raw material feed pump 4 penetrates into the container equipment chamber 1 through the arc sleeve 9, and a conveying pipeline 8 at the outlet of the raw material feed pump 4 penetrates into the container equipment chamber 1 through the arc sleeve 9.

The preparation system of this application is through the high low arrangement mode of design raw materials feeder, raw materials feed pump and preparation equipment to design pipeline and arc sleeve's structure, the back is stopped to the feed liquid, has the radioactivity feed liquid of pipeline and pump the inside can flow back into the feed liquid container automatically, thereby reduces the stay of radioactivity feed liquid in pipeline and equipment, reduces the influence of radioactivity feed liquid to maintainer.

In addition, the valve 11 and the bypass are arranged on the conveying pipeline 8 at the outlet and the inlet of the raw material feeding pump 4, so that the raw material feeding pump 4 and the material liquid in the conveying pipeline 8 can be conveniently operated and overhauled.

The sealing sleeve further comprises a straight sleeve 10, through which straight sleeve 10 the transport pipe 8 at the inlet of the preparation device 5 penetrates into the container device chamber 1, and through which straight sleeve 10 the transport pipe 8 at the outlet of the preparation device 5 penetrates into the container device chamber 1.

In other embodiments, preferably, the sealing sleeves at the inlet and outlet of the preparation device 5 may also use arcuate sleeves 9 to facilitate automatic return of the radioactive feed liquid in the tubing to the feed liquid container, thereby reducing the retention of the radioactive feed liquid in the tubing and the device.

As shown in fig. 2 to 3, the wall of the supply pump chamber 2 and the preparation apparatus chamber 3 on the side remote from the container apparatus chamber 1 is provided with a protective door 16. Referring to fig. 1-3, the preparation system further comprises a lifting room 17 and an overhaul room 18, wherein the lifting room 17 is located on the outer side of the protective door 16, and the overhaul room 18 is located above the preparation equipment room 3.

In the present application, the container apparatus chamber 1, the supply pump chamber 2 and the preparation apparatus chamber 3 are provided with cleaning and decontamination apparatuses, and when personnel need to enter into these plants for maintenance, cleaning and decontamination treatment is required to be performed on the inside of the plants in advance by using the cleaning and decontamination apparatuses.

Thus, when the electrical components in the electrolytic cell need to be maintained, the personnel after cleaning and decontamination can enter the room through the protective door 16 of the preparation equipment room 3 for direct maintenance, or the cover plate of the preparation equipment room 3 is opened, and the electrolytic cell is lifted out for maintenance by the crane of the maintenance room 18.

When the feed pump valve needs to be repaired, personnel can enter the room through the protective door 16 of the feed pump chamber 2 to directly repair or hoist the feed pump out of the repair room 18 through the hoist room 17 to repair. The preparation system of this application sets up the guard gate through feeding pump room and preparation equipment room wall to and set up handling room and maintenance room, further improved the security and the efficiency of maintenance.

Preferably, the container device chamber 1 also comprises a pouring device. The various storage tanks in the container equipment room adopt a maintenance-free dumping mode, so that the maintenance cost is reduced, and the irradiation time of personnel is reduced.

Preferably, the radiation-proof wall body includes a concrete wall 19 and a steel plate 20, the concrete wall 19 surrounding the container apparatus chamber 1, the steel plate 20 being located on an inner surface of the concrete wall 19. The steel plate 20 can not only play a role in sealing, but also prevent concrete from being polluted by radioactive feed liquid, and is convenient for cleaning, decontaminating and overhauling the internal equipment and pipelines of the container equipment room 1.

The preparation system of the application not only reduces the irradiation dose received in the inspection process, but also optimizes the arrangement scheme of the pipeline, and is convenient for the pipeline dismantling in the retired process.

In summary, from the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A radioactive material preparation system, characterized in that: the device comprises a container device chamber (1), a feeding pump chamber (2) and a preparation device chamber (3), wherein the container device chamber (1) is surrounded by a radiation-proof wall body, and the feeding pump chamber (2) and the preparation device chamber (3) are two independent rooms and are positioned at the side edge of the container device chamber (1);

the container equipment room (1) comprises a raw material feeder (6) and a product receiver (7), the material feeder pump (4) is arranged in the feeding pump room (2), the preparation equipment room (3) comprises a preparation equipment (5), the raw material feeder (6) is communicated with the preparation equipment (5) and the product receiver (7) sequentially through a wall penetrating pipeline, the raw material feeder pump (4) conveys raw materials in the raw material feeder (6) to the preparation equipment (5) for preparation, and products of the preparation equipment (5) are conveyed to the product receiver (7).

2. The manufacturing system of claim 1, wherein: the raw material feeder (6) is located lower than the raw material feed pump (4) in the height direction, and the raw material feed pump (4) is located lower than the preparation apparatus (5) in the height direction.

3. The manufacturing system of claim 2, wherein: the raw material feeder (6) and the product receiver (7) are both fixed on the radiation-proof wall of the container equipment chamber (1), and the position of the product receiver (7) in the height direction is higher than that of the raw material feeding pump (4).

4. A preparation system according to claim 3, characterized in that: the preparation equipment chamber (3) is positioned above the feeding pump chamber (2).

5. The manufacturing system of any one of claims 2-4, wherein: the wall penetrating pipeline comprises a conveying pipeline (8) and a sealing sleeve, the sealing sleeve is sleeved on the conveying pipeline (8), and the conveying pipeline (8) passes through the radiation-proof wall body through the sealing sleeve.

6. The manufacturing system of claim 5, wherein: the sealing sleeve comprises an arc sleeve (9), the conveying pipeline (8) at the inlet of the raw material feed pump (4) penetrates into the container equipment chamber (1) through the arc sleeve (9), and the conveying pipeline (8) at the outlet of the raw material feed pump (4) penetrates into the container equipment chamber (1) through the arc sleeve (9).

7. The manufacturing system of claim 6, wherein: valves (11) are arranged on the conveying pipelines (8) at the outlet and the inlet of the raw material feeding pump (4).

8. The manufacturing system of claim 6, wherein: the sealing sleeve further comprises a straight sleeve (10), the conveying pipeline (8) at the inlet of the preparation device (5) penetrates into the container device chamber (1) through the straight sleeve (10), and the conveying pipeline (8) at the outlet of the preparation device (5) penetrates into the container device chamber (1) through the straight sleeve (10).

9. The manufacturing system of claim 5, wherein: the container equipment room (1) also comprises a product feeder (12), the product feeder (12) is fixed on the radiation-proof wall body through a bracket (15), and the product feeder (12) is communicated with the product receiver (7).

10. The manufacturing system of claim 9, wherein: the feeding pump chamber (2) also comprises a product feeding pump (13), and the product feeder (12) is communicated with the product feeding pump (13) through the through-wall pipeline.

11. The manufacturing system of claim 9, wherein: the container equipment room (1) further comprises a raw material receiver (14), the raw material receiver (14) is fixed on the radiation-proof wall body through the support (15), and the raw material receiver (14) is communicated with the raw material feeder (6).

12. The manufacturing system of claim 5, wherein: the wall of the side, far away from the container equipment chamber (1), of the material supply pump chamber (2) and the preparation equipment chamber (3) is provided with a protective door (16).

13. The manufacturing system of claim 12, wherein: the preparation system further comprises a lifting room (17) and an overhaul room (18), wherein the lifting room (17) is located on the outer side of the protective door (16), and the overhaul room (18) is located above the preparation equipment room (3).

14. The manufacturing system of claim 1, wherein: the container equipment chamber (1) also comprises a pouring device.

15. The manufacturing system of claim 1, wherein: the radiation-proof wall body comprises a concrete wall (19) and a steel plate (20), wherein the concrete wall (19) surrounds the container equipment chamber (1), and the steel plate (20) is positioned on the inner surface of the concrete wall (19).