CN214752976U - Transfer container in spent fuel plant - Google Patents
Transfer container in spent fuel plant Download PDFInfo
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- CN214752976U CN214752976U CN202022448505.8U CN202022448505U CN214752976U CN 214752976 U CN214752976 U CN 214752976U CN 202022448505 U CN202022448505 U CN 202022448505U CN 214752976 U CN214752976 U CN 214752976U
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Abstract
The utility model belongs to the technical field of the radioactive substance stores, concretely relates to container is transported in spent fuel factory, including barrel (1) that is equipped with neutron shielding layer, detachable top cap (2) and detachable bottom (5), barrel (1) is by urceolus (10) and nestification urceolus (10) inside be used for holding inner tube (12) of the seal pot that is equipped with spent fuel assembly and constitute. Adopt the utility model provides an adversion container in spent fuel factory can shield the ray that the spent fuel subassembly produced effectively and prevent that the ray straight line from leaking, provides interim protection for operating personnel in the container transportation to guarantee that can be fine improves the radiating efficiency to the heat dissipation of seal pot, provides sufficient structural support and potential harm protection for seal pot and spent fuel subassembly simultaneously.
Description
Technical Field
The utility model belongs to the technical field of radioactive substance stores, concretely relates to inward transfer container of spent fuel factory.
Background
Due to the storage capacity of the spent fuel pool of the nuclear power plant, after the nuclear power plant operates for a period of time, the spent fuel assemblies must be transported from the spent fuel pool.
In recent years, due to the difficulty in transporting spent fuel out, the storage capacity of spent fuel in a spent fuel pool of a nuclear power plant which has been operated for years in China is close to or reaches a storage limit value. In order to ensure the normal operation of the nuclear power station, the spent fuel must be transported from a spent fuel pool of the nuclear power station to a middle off-reactor storage site for storage. If the spent fuel in the pool can not be transported out in time, the nuclear power station is in danger of shutdown.
The spent fuel transfer container is one of the key devices in the middle reactor storage system, and is used for transferring the sealed tank filled with the spent fuel assemblies from a spent fuel pool to a storage module of a reactor storage site for storage. The transfer container provides shielding and prevents potential hazards during the sealing operation and transfer of the sealed can. The transportation process must ensure the safety of transportation, ensure the goods package is intact under the normal condition, and also ensure that radioactive substances are not leaked under the condition of possible accidents. At present, no such container for in-plant transportation exists in China.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects existing in the prior art, the utility model aims at providing a spent fuel factory internal transfer container which has good shielding property, fire resistance, impact resistance and easy processing.
In order to achieve the above purpose, the utility model discloses a technical scheme is an adversion container of spent fuel factory, wherein, including the barrel that is equipped with neutron shielding layer, detachable top cap and detachable bottom, the barrel comprises urceolus and nestification the inside inner tube that is used for holding the seal pot that is equipped with spent fuel assembly of urceolus.
Further, the surface of urceolus is equipped with circumference neutron shielding layer, still including setting up top flange on the barrel open-top and setting up are in bottom flange on the barrel bottom opening.
Further, still including setting up the guide rail of inner tube internal surface, the guide rail is used for installing the seal pot, the quantity of guide rail is 1 or many.
Furthermore, a gamma shielding layer is arranged between the outer cylinder and the inner cylinder, and the gamma shielding layer is made of lead.
The circumferential neutron shielding layer is arranged in a cavity between the outer barrel and the steel shell; and a plurality of radiating fins are uniformly arranged in the cavity between the outer barrel and the steel shell.
Further, the top cover consists of a cover body and a cover plate covering the upper surface of the cover body, the cover body is connected with the top flange, and a top neutron shielding layer is arranged in a cavity between the cover body and the cover plate; the top cover is connected with the top flange through bolts.
Further, the combination part of the cover body and the top flange adopts a concave-convex structure capable of preventing ray from leaking linearly; the edge of the lower surface of the cover body is also uniformly provided with a plurality of grooves for ventilation in the inner cylinder.
Furthermore, a through hole communicated with the inside of the inner cylinder is formed in the center of the bottom flange, and uniform fan-shaped bosses are arranged on the upper surface of the bottom flange around the through hole and used for water drainage operation inside the inner cylinder; the lower surface of the bottom flange is provided with an annular cavity, and a bottom neutron shielding layer is arranged in the annular cavity.
Further, the bottom cover is detachably arranged on the through hole, sealing is achieved between the bottom cover and the through hole through a sealing ring, and the bottom cover is connected with the bottom flange through a bolt.
Further, still including setting up lift trunnion and the support trunnion on the barrel, the lift trunnion is close to the top of barrel, the support trunnion is close to the bottom of barrel.
The utility model has the advantages as follows:
1. the internal transfer container of the spent fuel plant is of a stainless steel cylinder structure, and provides enough structural support and potential hazard protection for a sealed tank and a spent fuel assembly which need to be transferred in the internal transfer container;
2. the gamma shielding layer 11 is made of lead materials, and can effectively shield rays generated by the spent fuel assembly; the radiating fins 19 and the neutron shielding material are arranged in the circumferential neutron shielding layer 9, so that neutrons can be effectively shielded, the radiating area of the outer wall of the container is increased, the radiating efficiency is improved, and a buffering effect is provided for impact under the accident condition of the container;
3. the top cover 2 is in concave-convex fit with the top flange 8 of the cylinder body 1, so that the installation and the operation are convenient, and the linear leakage of rays generated by a spent fuel assembly can be effectively prevented; the groove 18 at the bottom of the top cover 2 (namely the edge of the lower surface of the cover body 6) enables the inside of the container to keep ventilation with the outside environment air, so that the container achieves the heat dissipation effect through air convection; the top neutron shielding layer 7 in the top cover 2 can effectively shield top neutron radiation, and the top neutron shielding layer 7 can be manufactured by a filling method due to the cavity-wrapping structure adopted in the top cover 2, so that the processing is easy;
4. the guide rails 13 are arranged in the inner barrel 12, so that the stability of the sealed tank in pushing or pulling out from the transfer container is improved, and additional support is provided for the sealed tank in the inner barrel 12 in case of an accident;
5. a circular through hole 20 is designed in the center of the bottom flange 15 and is used as an inlet when the sealing tank is pushed into or pulled out of the storage module by a hydraulic cylinder; the through hole 20 is provided with a bottom cover 5, and the through hole 20 is sealed by the bottom cover 5 and an O-shaped sealing ring matched with the bottom cover 5 during underwater charging;
drawings
FIG. 1 is a schematic view of an internal spent fuel plant transport container according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of an internal spent fuel plant transport container according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of the top cover 2 according to an embodiment of the present invention;
fig. 4 is a schematic view of the cap body 6 according to the embodiment of the present invention;
FIG. 5 is a schematic view of a spent fuel plant transport container according to an embodiment of the present invention (showing cooling fins 19);
in the figure: 1-cylinder, 2-top cover, 3-lifting trunnion, 4-supporting trunnion, 5-bottom cover, 6-cover body, 7-top neutron shielding layer, 8-top flange, 9-circumferential neutron shielding layer, 10-outer cylinder, 11-gamma shielding layer, 12-inner cylinder, 13-guide rail, 14-bottom neutron shielding layer, 15-bottom flange, 16-steel shell, 17-cover plate, 18-groove, 19-radiating fin and 20-through hole.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in fig. 1, the container for transferring in the spent fuel plant comprises a cylinder body 1 provided with a neutron shielding layer, a detachable top cover 2 and a detachable bottom cover 5.
As shown in fig. 2, the barrel 1 is composed of an outer barrel 10 and an inner barrel 12 nested inside the outer barrel 10, the inner barrel 12 is used for containing a sealed tank filled with spent fuel components, a circumferential neutron shielding layer 9 is arranged on the outer surface of the outer barrel 10, and the barrel further comprises a top flange 8 arranged on the top opening of the barrel 1 and a bottom flange 15 arranged on the bottom opening of the barrel 1.
The sealing device also comprises guide rails 13 arranged on the inner surface of the inner cylinder 12, the guide rails 13 are used for installing the sealing tanks, and the number of the guide rails 13 is 1 or more.
A gamma shield layer 11 is provided between the outer cylinder 10 and the inner cylinder 12, the outer cylinder 10 and the inner cylinder 12 are made of stainless steel, and the gamma shield layer 11 is made of lead, and lead is filled between the outer cylinder 10 and the inner cylinder 12.
The neutron shielding device is characterized by further comprising a steel shell 16 arranged on the outer side of the outer cylinder 10, wherein the circumferential neutron shielding layer 9 is arranged in a cavity between the outer cylinder 10 and the steel shell 16 and is formed by pouring neutron shielding materials into the cavity; a plurality of radiating fins 19 (as shown in fig. 5) are uniformly arranged in the cavity between the outer cylinder 10 and the steel shell 16, and the outer cylinder 10 and the radiating fins 19 are fixedly connected by welding.
As shown in fig. 3, the top cap 2 is composed of a cap body 6 and a cover plate 17 covering the upper surface of the cap body 6, the cap body 6 is connected with a top flange 8, a top neutron shielding layer 7 is arranged in a cavity between the cap body 6 and the cover plate 17, and the cavity is filled with neutron shielding material; the top cover 2 is connected to the top flange 8 by bolts.
The joint part of the cover body 6 and the top flange 8 adopts a concave-convex structure which can prevent the linear leakage of rays; as shown in fig. 4, a plurality of grooves 18 are uniformly formed on the edge of the lower surface of the cap body 6 for ventilation of the inside of the inner cylinder 12.
A through hole 20 communicated with the inside of the inner cylinder 12 is formed in the center of the bottom flange 15, and uniform fan-shaped bosses are arranged on the upper surface of the bottom flange 15 around the through hole 20 and used for water drainage operation inside the inner cylinder 12; an annular cavity is formed in the lower surface of the bottom flange 15, a bottom neutron shielding layer 14 is arranged in the annular cavity, and the annular cavity is filled with neutron shielding materials.
The bottom cover 5 is detachably arranged on the through hole 20, the bottom cover 5 is made of stainless steel, sealing is achieved between the bottom cover 5 and the through hole 20 through a sealing ring, and the bottom cover 5 is connected with the bottom flange 15 through bolts. The through hole 20 serves as an inlet for the hydraulic cylinder to push the seal can into or out of the storage module, and is sealed with the bottom cover 5 during charging.
Still including setting up lifting trunnion 3 and the support trunnion 4 on barrel 1, lifting trunnion 3 is close to the top of barrel 1, and support trunnion 4 is close to the bottom of barrel 1.
The manufacturing steps of the transfer container in the spent fuel plant provided by the utility model are as follows:
firstly, the inner cylinder 12 and the bottom flange 15, and the outer cylinder 10 and the bottom flange 15 are respectively welded to form an inner cavity. And vertically placing the container, pouring lead into the cavity from the position of the top flange 8 to form a gamma shielding layer 11, and welding the top flange 8 after filling the gamma shielding layer with lead. The fan-shaped boss (neutron shielding lower end plate) and the bottom flange 15 are welded. The radiating fins 19 are welded with the outer cylinder 10, and then the steel shell 16 is welded on the radiating fins to form a cavity. The container is vertically placed, and neutron shielding materials are filled into the cavity.
The utility model provides a practical application of transport container in spent fuel factory as follows:
in operation, the bottom of the container is sealed by the bottom cover 5 and the matched O-shaped sealing ring. The transfer container with the sealed tank is lifted by the lifting trunnion 3 and placed under water, a spent fuel assembly is loaded, the transfer container is lifted out of the water, and the sealed tank and other parts of the transfer container are installed after the outer surface of the container is washed. After the detection is qualified, the lifting lug 4 is utilized to hoist the transportation vehicle, and the transportation vehicle is fixedly transported through the lifting lug shaft 3 and the supporting lug shaft 4. During storage, the top cover 2 and the bottom cover 5 are detached, and the sealed tank is pushed into the storage module by a hydraulic rod through the round hole 20 at the bottom of the container for storage.
The device of the present invention is not limited to the specific embodiments described in the embodiments, and those skilled in the art can obtain other embodiments according to the technical solution of the present invention, which also belongs to the technical innovation scope of the present invention.
Claims (7)
1. An internal transfer container of spent fuel plant is characterized in that: the device comprises a cylinder body (1) provided with a neutron shielding layer, a detachable top cover (2) and a detachable bottom cover (5), wherein the cylinder body (1) consists of an outer cylinder (10) and an inner cylinder (12) which is nested in the outer cylinder (10) and used for containing a sealed tank filled with a spent fuel component;
the outer surface of the outer cylinder (10) is provided with a circumferential neutron shielding layer (9), and the outer cylinder further comprises a top flange (8) arranged on the top opening of the cylinder body (1) and a bottom flange (15) arranged on the bottom opening of the cylinder body (1);
a gamma shielding layer (11) is arranged between the outer cylinder (10) and the inner cylinder (12), and the gamma shielding layer (11) is made of lead;
the device also comprises a steel shell (16) arranged on the outer side of the outer cylinder (10), and the circumferential neutron shielding layer (9) is arranged in a cavity between the outer cylinder (10) and the steel shell (16); a plurality of radiating fins (19) are uniformly arranged in the cavity between the outer cylinder (10) and the steel shell (16).
2. The in-plant transport container of spent fuel according to claim 1, wherein: still including setting up guide rail (13) at inner tube (12) internal surface, guide rail (13) are used for the installation the seal pot, the quantity of guide rail (13) is 1 or many.
3. The in-plant transport container of spent fuel according to claim 2, wherein: the top cover (2) is composed of a cover body (6) and a cover plate (17) covering the upper surface of the cover body (6), the cover body (6) is connected with the top flange (8), and a top neutron shielding layer (7) is arranged in a cavity between the cover body (6) and the cover plate (17); the top cover (2) is connected with the top flange (8) through bolts.
4. The spent fuel plant shipping container of claim 3, wherein: the joint part of the cover body (6) and the top flange (8) adopts a concave-convex structure capable of preventing ray from leaking linearly; the edge of the lower surface of the cover body (6) is also uniformly provided with a plurality of grooves (18) for ventilation in the inner cylinder (12).
5. The in-plant transport container of spent fuel according to claim 4, wherein: a through hole (20) communicated with the inside of the inner cylinder (12) is formed in the center of the bottom flange (15), and uniform fan-shaped bosses are arranged on the upper surface of the bottom flange (15) around the through hole (20) and used for water drainage operation inside the inner cylinder (12); an annular cavity is arranged on the lower surface of the bottom flange (15), and a bottom neutron shielding layer (14) is arranged in the annular cavity.
6. The in-plant transport container of spent fuel according to claim 5, wherein: the bottom cover (5) is detachably arranged on the through hole (20), sealing is achieved between the bottom cover (5) and the through hole (20) through a sealing ring, and the bottom cover (5) is connected with the bottom flange (15) through bolts.
7. The in-plant transport container of spent fuel according to claim 6, wherein: still including setting up lifting trunnion (3) and support trunnion (4) on barrel (1), lifting trunnion (3) are close to the top of barrel (1), support trunnion (4) are close to the bottom of barrel (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022448505.8U CN214752976U (en) | 2020-10-29 | 2020-10-29 | Transfer container in spent fuel plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022448505.8U CN214752976U (en) | 2020-10-29 | 2020-10-29 | Transfer container in spent fuel plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214752976U true CN214752976U (en) | 2021-11-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022448505.8U Active CN214752976U (en) | 2020-10-29 | 2020-10-29 | Transfer container in spent fuel plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214752976U (en) |
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2020
- 2020-10-29 CN CN202022448505.8U patent/CN214752976U/en active Active
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