CN108648845B - Storage container for high-enriched uranium-containing detector and storage method of high-enriched uranium-containing detector - Google Patents
Storage container for high-enriched uranium-containing detector and storage method of high-enriched uranium-containing detector Download PDFInfo
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- CN108648845B CN108648845B CN201810379764.4A CN201810379764A CN108648845B CN 108648845 B CN108648845 B CN 108648845B CN 201810379764 A CN201810379764 A CN 201810379764A CN 108648845 B CN108648845 B CN 108648845B
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- China
- Prior art keywords
- detector
- box body
- storage container
- enriched uranium
- uranium
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 229910052770 Uranium Inorganic materials 0.000 title claims abstract description 40
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000004992 fission Effects 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000003749 cleanliness Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 239000000523 sample Substances 0.000 claims description 2
- 239000011824 nuclear material Substances 0.000 abstract description 15
- 239000000446 fuel Substances 0.000 abstract description 2
- 239000000306 component Substances 0.000 description 34
- 230000007774 longterm Effects 0.000 description 5
- 238000007599 discharging Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- -1 mid-range detectors Chemical compound 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F5/00—Transportable or portable shielded containers
- G21F5/015—Transportable or portable shielded containers for storing radioactive sources, e.g. source carriers for irradiation units; Radioisotope containers
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F5/00—Transportable or portable shielded containers
- G21F5/06—Details of, or accessories to, the containers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
A storage container for a detector containing high-concentration uranium and a storage method for the detector containing high-concentration uranium belong to the technical field of nuclear power plant fuel management. The storage container comprises a box body and an upper cover plate covered on the box body; the side surface of the box body is provided with an inflation inlet, an exhaust port, a pressure gauge interface and a hygrothermograph interface; a plurality of brackets are arranged in the box body and used for fixing the components of the detector after being split. The storage method of the high-enriched uranium detector is realized by adopting the storage container. The invention has simple structure, and can ensure that the high-enriched uranium nuclear material control in the detector meets the national control regulations and ensure that the detector cannot be damaged or degraded after being stored on site for a long time.
Description
Technical Field
The invention relates to the technical field of nuclear power plant fuel management, in particular to a storage container for a high-enriched uranium-containing detector and a storage method of the high-enriched uranium-containing detector.
Background
The detector (IR) containing high-concentration uranium, such as a mid-range detector, is arranged at the periphery of a reactor pressure vessel, a core component is a fission chamber, and an inner cavity is coated with a small amount of high-concentration uranium for reactor safety supervision and protection during the starting, power up and daily operation of the reactor. According to the requirements of the memorandum in the nuclear energy field signed by the two countries of China and laws and regulations such as the regulations of nuclear materials of the people's republic of China, necessary physical protection measures are adopted for the intermediate range detector containing nuclear materials, and the nuclear materials are stored according to corresponding grades.
The development and application of the novel intermediate range detector storage container containing the high-concentration uranium aims to solve the technical difficulty of storing the novel intermediate range detector containing the high-concentration uranium in a nuclear power site, meet the requirements of nuclear energy field memorandum signed by the two countries of China and legal regulations such as the national regulation of nuclear materials of the people's republic of China on nuclear materials, and is used for long-term storage of the detector.
At present, the storage of intermediate range detectors containing enriched uranium in each domestic nuclear power plant and related fields is blank, a special storage container and experience for reference are not available, and the intermediate range detectors are not managed as nuclear materials according to the classification of the physical protection level of the nuclear materials. The same type of meter or other device management has not formed a unified management standard. With the development of the nuclear power field, a plurality of units can use the intermediate range detector with high-concentration uranium later in China. If the system is used for common instrument equipment management, the system does not meet the requirements of nuclear security and nuclear material control, and is reasonably and safely controlled to meet the related regulations of nuclear security and nuclear material control. In order for the storage of spare parts IR to meet nuclear material regulatory requirements, it is ensured that long-term storage of the mid-range detector in the field does not result in damage or performance degradation.
Therefore, there is a need to design and develop a long-term storage container for meter equipment of a medium-range detector containing high-concentration uranium, which not only can meet the conventional condition requirements of temperature and humidity, cleanliness and the like of the meter equipment storage, but also can ensure that the long-term stored IR (infrared) detector equipment cannot be damaged or has degraded performance, and can further meet the related requirements of nuclear security and nuclear material control, thereby ensuring the safety and controllability of nuclear materials and filling the blank of the domestic field.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a storage container for a detector containing high-enriched uranium, which ensures that the detector is not damaged or degraded in the long-term storage process of the detector containing high-enriched uranium on site.
The invention is realized by the following technical scheme:
The invention relates to a storage container for a detector containing high-concentration uranium, which comprises a box body and an upper cover plate covered on the box body; the side surface of the box body is provided with an inflation inlet, an exhaust port, a pressure gauge interface and a hygrothermograph interface; a plurality of brackets are arranged in the box body and used for fixing the components of the detector after being split.
Preferably, the plurality of brackets are arranged in the box body side by side, and a spacing distance which enables components of the detector fixed on the adjacent brackets not to touch each other is reserved between the adjacent brackets.
Preferably, the box body is of a cuboid structure and is used for horizontally placing the components of the detector.
Preferably, the holder is provided with an insulating pad at a portion thereof contacting the detector.
Preferably, the case has a positive pressure structure such that the dry gas is charged into the case through the charging port and maintains a positive pressure to prevent moisture from entering.
Preferably, the side covers of the box body at the air charging opening and the air discharging opening are sealed by rubber.
Preferably, a forklift hole is formed in the lower portion of the box body, and/or lifting lugs are arranged on the upper cover plate.
Preferably, the storage container for the detector containing high-concentration uranium is characterized in that universal wheels are arranged at the lower portion of the box body.
The storage method of the high-enriched uranium detector adopts the storage container for the high-enriched uranium detector for storage; the method comprises the following steps:
step one, checking the cleanliness in the box body and the integrity of the components before loading;
step two, the detector is split into a fission chamber component, a middle buffer sleeve component and a bottom component, and the components are fixed in the box body through a bracket;
step three, covering the upper cover plate on the box body and fixing the upper cover plate and the box body;
And fourthly, filling nitrogen after the storage container is assembled, installing a lock pin and sealing the storage container in lead.
Preferably, the three components of the probe split in the second step are sequentially arranged on the bracket according to the sequence of the fission chamber component, the middle buffer sleeve component and the bottom component.
Preferably, the method further comprises performing a single container transfer operation after step four: a crane or forklift is used for ensuring balance in the operation process of the detector containing high-concentration uranium.
The invention has the following beneficial effects:
The storage container for the high-enriched uranium detector and the storage method for the high-enriched uranium detector can meet the conventional condition requirements of instrument equipment such as storage humidity and cleanliness, ensure that the IR detector stored for a long time cannot be damaged or performance is reduced, and can meet the related requirements of nuclear material control, thereby ensuring the safety and controllability of nuclear materials and filling the blank of the domestic field.
Drawings
FIG. 1 is a top plan view of a tank of a storage vessel for a detector containing enriched uranium in accordance with the present invention;
FIG. 2 is a front view of a storage vessel for a enriched uranium containing detector according to the present invention;
FIG. 3a is a side view of a storage vessel for a enriched uranium containing detector according to the present invention;
FIG. 3b is another test chart of a storage vessel for a high enriched uranium containing detector according to the present invention;
Fig. 4 is a schematic diagram of the structure of an upper cover plate of a storage container for a detector containing high-enriched uranium.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1-4, a storage container for a detector containing highly enriched uranium comprises a tank body 4 and an upper cover plate 6. The upper cover plate 6 is covered on the box body 4, and the upper cover plate and the box body can be fixed together through a connecting bolt or a screw. The side surface 5 of the box body 4 is provided with an inflation inlet 7, an exhaust port 8 and a pressure gauge interface/hygrothermograph interface 10. The pressure gauge interface/hygrothermograph interface 10 is externally connected with a pressure gauge/hygrothermograph and is used for judging the pressure/temperature and humidity of the content of the container. The box body 4 is internally provided with a plurality of brackets 2, and the brackets 2 are stainless steel brackets and are used for fixing the components of the detector after being split.
The detector is split into a plurality of components and is fixed in the box body by a plurality of brackets 2, and the detector is tightly pressed by combining an upper cover plate 6 so as to be firmly clamped and fixed. The detector can be split into 3 components, namely a fission chamber component 01, an intermediate buffer sleeve component 02 and a bottom component 03. The three components are sequentially arranged in three brackets 2 according to a fission chamber component 01, a middle buffer sleeve component 02 and a bottom component 03, and are arranged side by side. The adjacent holders 2 are spaced apart such that the components of the detector fixed to the adjacent holders 2 do not touch each other. For convenience in storage, the box body 4 is designed into a cuboid box body structure, a horizontal storage mode is adopted, the external dimensions of the box body 9 are 1800mm multiplied by 800mm multiplied by 300mm, and the self weight of the box body 9 is about 500Kg. In order to protect the detector assembly, the holder is provided with an insulating pad, preferably a rubber pad, at its part in contact with the detector.
The case 4 is designed in a positive pressure structure such that dry gas is charged into the case 4 through the charging port 7 and maintains a positive pressure to prevent moisture from entering. The side covers of the box body 4 at the air charging opening 7 and the air discharging opening 8 are sealed by rubber, so that moisture is further prevented from entering. The air charging opening 7 and the air discharging opening 8 are arranged on two opposite side surfaces 5 of the box body 4.
In order to facilitate the transfer of the storage container, in one embodiment, a forklift hole is formed in the lower portion of the box body 4, and the storage container is lifted by extending into the forklift hole by using a forklift to keep a balanced state. In another embodiment, the lifting lugs 14 are arranged on the upper cover plate 6, and when the lifting lugs 14 are required to be lifted, the lifting ring screws can be assembled together to ensure that the storage container is lifted in a balanced state. In another embodiment, the lower part of the box body 4 is provided with a universal wheel 3. When the space for crane or forklift operation is not provided, the universal wheel can be used for transferring.
When the storage containers are required to be stacked, fixing bolt adjusting feet are arranged at the lower part of the box body 4 of the storage containers, the storage containers are kept in a balanced state by adjusting the plurality of fixing bolt adjusting feet at the lower part of the box body, and the stacking layers are not easy to be too high.
Because detectors containing high enriched uranium, such as mid-range detectors, are background radiation levels, the storage containers of the present invention primarily take into account mechanical strength requirements, and do not take into account shielding design requirements.
By using the storage container, the storage method of the detector containing high-concentration uranium specifically comprises the following steps:
Step one, checking the cleanliness in the box body 4 and the integrity of the components before loading; such as visual inspection of the storage container to ensure that the storage container is clean and the associated components are intact.
Step two, the detector is split into a fission chamber component, a middle buffer sleeve component and a bottom component, and the components are fixed in a box body 4 through a bracket 2; wherein, the three components are placed on the bracket 2 in sequence of the fission chamber component, the middle buffer sleeve component and the bottom component.
Step three, the upper cover plate 6 is covered on the box body 4 and is fixed; closing the cover and tightening the connecting bolt, if a crane is needed, the lifting screw also needs to be tightened.
And step four, filling nitrogen after the storage container is assembled, installing a lock pin and sealing the storage container by lead so as to prevent the container from being opened by mistake. The locking pin is mounted on the locking pin hole 11 of the upper cover plate 6 and lead sealing is performed.
In the whole storage process, collision between the detector assembly and the storage container and between all parts of the storage container are avoided, and the container and the content are ensured to be intact.
After the storage container is loaded with the detector, the storage container may be further subjected to a transfer operation:
The storage container may be transferred using a crane or forklift: when the crane is used for hoisting, the hoisting ring screws are used simultaneously, so that the balance of the container in the hoisting process is ensured; when the forklift is used, the balance of the container is ensured, and the falling is avoided. If the operating space is inconvenient for using a crane or forklift, the container can be rotated by using the universal wheel at the bottom of the storage container. Wherein, the hoisting or transferring process only allows the operation of a single container, the load capacity of the crane/forklift does not exceed the limit value, and the load capacity of a single steel wire rope does not exceed the limit value; in addition, the lifting height of the storage container must not exceed a limit value.
After the storage container is loaded with the detector, stacking operation can be further performed on the storage container: the storage containers are stacked and the storage containers are stably placed through adjusting the fixing stud adjusting pins; the stacking level of the container must not exceed the limit layer number; the containers are stacked with care to prevent instability.
When the detector needs to be unloaded, the storage container needs to be opened first:
1) Before the storage container is opened, the storage container should be visually inspected, so that the whole integrity of the storage container is ensured to be good, and the lock pin lead seal is ensured to be good;
2) Opening the inflation inlet 7, and loosening and removing the flange connecting bolts and the lifting ring bolts;
3) Lifting and translating the upper cover plate 6;
4) The whole process should avoid collision and ensure the integrity of the storage container and the contents.
Secondly, the detector is taken out of the storage container:
1) The bracket fixing bolts are loosened, and the detector component is not fixed in the box body 4 through the bracket 2;
2) Sequentially taking out the detector assemblies;
3) The container is reset.
In addition, maintenance of the storage container of the present invention is also required.
1) The appearance of the storage container is visually checked at regular intervals every month, so that the special label is ensured to be intact and clear, and the lead seal is ensured to be intact;
2) Periodically inspecting the barometer of the storage container every month, and if the barometer is abnormal, checking the barometer, replacing a sealing gasket or replacing an inflation valve;
3) The pressure gauge used for the sealing inspection and gas replacement of the storage container is in the verification validity period;
4) After each opening and assembling operation of the storage container, it should be checked whether the connection bolt and the eye bolt are damaged and the damaged parts should be replaced.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.
Claims (5)
1. The storage container for the detector containing the high-concentration uranium is characterized by comprising a box body and an upper cover plate covered on the box body; the side surface of the box body is provided with an inflation inlet, an exhaust port, a pressure gauge interface and a hygrothermograph interface; three brackets are arranged in the box body and used for fixing the split components of the detector; the three brackets are arranged in the box body side by side, and a fission chamber assembly, a middle buffer sleeve assembly and a bottom assembly which are separated from each other by the detectors are sequentially arranged, and a spacing distance which enables the assemblies of the detectors fixed on the adjacent brackets not to touch each other is reserved between the adjacent brackets; the support is provided with an insulating liner at the part of the support, which is contacted with the detector; the box body is of a cuboid structure and is used for horizontally placing a component of the detector; the box body is of a positive pressure structure, so that dry gas is filled into the box body through the charging port and positive pressure is maintained to prevent moisture from entering.
2. A storage container for a detector containing enriched uranium as claimed in claim 1, wherein the lower portion of the tank is provided with forklift apertures and/or the upper cover plate is provided with lifting lugs.
3. A storage container for a high enriched uranium containing probe as claimed in claim 1 wherein the lower portion of the tank is provided with universal wheels.
4. A method for storing a high enriched uranium detector, characterized in that a storage container for a high enriched uranium detector according to any of claims 1 to 3 is used for storing; the method comprises the following steps:
step one, checking the cleanliness in the box body and the integrity of the components before loading;
step two, the detector is split into a fission chamber component, a middle buffer sleeve component and a bottom component, and the components are fixed in the box body through a bracket;
step three, covering the upper cover plate on the box body and fixing the upper cover plate and the box body;
And fourthly, filling nitrogen after the storage container is assembled, installing a lock pin and sealing the storage container in lead.
5. The method of claim 4, further comprising performing a single vessel transfer operation after step four: a crane or forklift is used for ensuring balance in the operation process of the detector containing high-concentration uranium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810379764.4A CN108648845B (en) | 2018-04-25 | 2018-04-25 | Storage container for high-enriched uranium-containing detector and storage method of high-enriched uranium-containing detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810379764.4A CN108648845B (en) | 2018-04-25 | 2018-04-25 | Storage container for high-enriched uranium-containing detector and storage method of high-enriched uranium-containing detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108648845A CN108648845A (en) | 2018-10-12 |
| CN108648845B true CN108648845B (en) | 2024-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810379764.4A Active CN108648845B (en) | 2018-04-25 | 2018-04-25 | Storage container for high-enriched uranium-containing detector and storage method of high-enriched uranium-containing detector |
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| Publication number | Publication date |
|---|---|
| CN108648845A (en) | 2018-10-12 |
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