JP4110088B2 - Radioactive material container transport equipment and storage system thereof - Google Patents

Description

  The present invention relates to transportation of spent fuel storage containers generated mainly from nuclear power plants, and radioactive material storage container transport equipment and storage systems related to the storage facilities thereof.

  The fuel used for a certain period in the core of the nuclear power generation facility is taken out of the core and temporarily stored in a spent fuel pool or the like. The fuel for which the predetermined cooling period has ended is finally transported to a reprocessing plant, where it is reprocessed and uranium and plutonium are taken out as recycled resources and reused.

  Currently, spent fuel generated at nuclear power plants is increasing along with power generation demand, so even if the reprocessing plant is in operation, the spent fuel generated in the country will exceed the processing capacity at the reprocessing plant, It needs to be properly managed and stored in the period until reprocessing.

  There are dry storage systems such as dry cask storage, vault storage, silo storage, concrete cask storage, and water pool wet storage systems as methods of management and storage inside or outside the nuclear power plant site. In view of cost and long-term stable storage, dry storage is attracting attention. Among dry storage systems, the cask storage system currently in practical use is a method of storing spent fuel in a dry cask that is a radioactive substance storage container. The facility for managing and storing the dry cask containing the spent fuel maintains the cooling performance of the dry cask, maintains the shielding performance of the direct line from the dry cask and the skyshine, and is sufficient to maintain these performances. Structural strength is required.

  Therefore, in the cask storage facility of Patent Document 1, a cooling air supply port and an exhaust port are provided in the lower side wall of the building for storing the cask and the overhead crane for carrying the cask, and the cooling air flow path is configured. is doing.

  In Patent Document 2 and Patent Document 3, a bridge-type transport crane is installed in the upper part of the building in which the cask is stored, and an air supply port for cooling the heat generated by the cask stored in the building is provided on the side of the building. A cooling air flow path is configured by providing a structure in which an exhaust port is provided on the side of the building or in the center.

  The facility for storing other radioactive substance storage containers uses a facility that blows out air from the building floor of the facility storing the radioactive substance storage containers and transports the same principle as the air pallet transport system. An example of reducing incidental equipment costs is shown in Patent Document 4.

  Patent Document 5 discloses a storage container storage system in which a metal cask or a concrete cask is transported in a storage facility by a self-propelled container transport device in which a power source and an air compressor are integrated using an air pallet. .

JP-A-9-26497 JP 2000-180586 A Japanese Patent Laid-Open No. 9-1113679 JP 2001-289996 A JP 2002-148386 A

  In the conventional radioactive substance storage container storage facilities of Patent Documents 1 to 4, when a crane for transporting cask is installed in a building, the building is enlarged to store the crane for transport, and the ceiling is formed on the side wall of the building. Since it is necessary to support the load of the crane and the lifted cask, and the structure becomes complicated due to earthquake resistance considerations, it is difficult to reduce the construction work.

  In addition, when a bridge type transport crane is installed at the top of the building where the cask is stored, the building can be downsized and the structure can be simplified, but when carrying the cask into the building, The shielding lid provided on the upper part of the building will be opened and inserted from the upper part, which will invade the storage part such as rain and snow, and it has a great influence on the stored cask, and it is necessary to take countermeasures. In addition, it is necessary to support the bridge-type transport crane and the lifted cask on the building ceiling or the side wall of the building, and the structure becomes complicated due to earthquake resistance considerations, so it is difficult to reduce the construction work.

  In any case where the cask is transported by an overhead crane or a bridge crane, the height of the crane rail is limited by the height required for unloading from the trailer that transported the cask. It is difficult to keep the height low.

  Further, in a system in which a metal cask or a concrete cask is transported in a storage facility by a container transport device in which a power source and an air compressor are integrated using an air pallet disclosed in Patent Document 5, the size of the entire system is made compact. However, when moving several hundred meters, the entire system becomes large, and it is difficult to make the area for transporting the storage facility sufficiently compact. When an intermediate storage facility for radioactive substance storage containers was added, the movement between buildings had to be once loaded on a trailer. For this reason, a reception building was necessary for the expanded building.

  Similarly, in the case of an on-site storage facility, it was necessary to once load and transport a trailer. For this reason, the storage building required a reception facility.

  An object of the present invention is to provide a radioactive substance storage container transport facility and a storage system for the radioactive substance storage container that can be made compact, thereby reducing the storage area, and reducing the area required for transport and making it compact. It is to provide.

  In order to achieve the above object, the present invention provides an air pallet for reducing the coefficient of friction of a radioactive substance storage container and a radioactive substance storage container transport facility comprising a drive device for moving the radioactive substance storage container. The compressed air supply means is provided with compressed air supply means for supplying compressed air, and the compressed air supply means supplies compressed air using liquid air so that the radioactive substance storage container can be conveyed independently. .

  The compressed air supply means of the present invention is characterized in that a power source is used for a vaporizer that generates compressed air from liquid air.

  In order to achieve the above object, the present invention relates to an air pallet and a drive in a radioactive material storage container transport facility provided with an air pallet for reducing the friction coefficient of the radioactive material storage container and a drive device for moving the radioactive material storage container. The apparatus is provided with compressed air supply source means for supplying compressed air to the apparatus, and the compressed air supply means supplies compressed air using a compressed air cylinder so that the radioactive substance storage container can be conveyed independently. Is.

  According to the present invention, the transport device for the radioactive substance storage container can be made compact, thereby reducing the area required for transport, and the storage area of the self-propelled transport vehicle, transport equipment, and radioactive material. A storage container storage facility and a storage system thereof can be provided.

The present embodiment will be described with reference to FIGS . FIG. 1 shows an example of the radioactive substance storage container transport facility of the present invention.

  As shown in FIG. 1, the radioactive substance storage container transport facility of the present invention has an air pallet 3 inserted into a lower part of a storage stand 2 to which the radioactive substance storage container 1 is fixed, and a storage stand 2 to which the radioactive substance storage container 1 is fixed. Is a facility for transporting.

  In the radioactive substance storage container transport facility of the present invention, liquid air guided from the liquid air cylinder 6 is vaporized by the vaporizer 4 and supplied to the air pallet 3 as compressed air.

  In the air pallet 3, compressed air is blown out from below and an air film is formed between the air pallet 3 and the friction coefficient is reduced. Depending on the state of the floor surface, about 1 / The load required for movement from 1000 to 1/100 can be reduced. Thereby, even if the radioactive substance storage container 1 has a large weight exceeding 100 t, it can be transported by equipment having a small driving force. Furthermore, compared with the overhead crane which is the conventional conveyance equipment, it has a low lift and can eliminate the influence of dropping.

  The vaporizer 4 converts liquid air sent from the liquid air cylinder 6 into compressed air by a power source supplied from a heater power source 5.

  FIG. 2 shows details of the vaporizer 4.

  Liquid air from the liquid air cylinder 6 is supplied through a valve 46 provided in the vaporizer 4, and this valve 46 prevents the air generated in the vaporizer 4 from flowing back to the liquid air cylinder 6, and only liquid air is supplied. The gas is supplied from the liquid air cylinder 6 to the vaporizer.

  The liquid air supplied from the valve 46 is dropped into the evaporator 44 heated by the heater 42, and vaporized air is generated. The power supplied from the heater power source 5 is used as the power source of the heater 42.

  The compressed air from the vaporizer 4 is supplied to the air pallet 3 via a valve 34 that adjusts the air amount, and the radioactive substance storage of the present invention is provided via the valve 32 that adjusts the air amount in addition to the air pallet 3. It is also supplied to a drive device 8 that drives the drive wheels 7 of the container transport facility. The driving device 8 has a configuration that generates a driving force by an air motor.

  The air pallet 3 is connected to the driving device 8 by an air pallet joint portion 9, and the air pallet that is lifted by the supply of compressed air is not restricted in movement in the vertical direction by the air pallet joint portion 9, but in the horizontal direction. The movement is regulated, and the driving force is transmitted to the air pallet 3 without generating unnecessary stress on the driving device 8.

  The radioactive substance storage container transport facility according to the present invention has a completely self-propelled configuration in which the radioactive substance storage container 1 is transported together with the storage rack 2 after the radioactive substance storage container 1 is fixed to the storage rack 2.

  FIG. 3 shows the application of the radioactive substance storage container transport facility of the present invention in the case of a metal cask storage facility.

  The metal cask 14 which is a radioactive substance storage container is fixed to the storage stand 2 and is transported in the metal cask storage facility 10 in this state. The metal cask storage facility expansion part 11 constructed adjacent to the metal cask storage facility 10 is connected by an inter-building transport passage 12. An air pallet transfer system 13 which is a radioactive substance storage container transfer facility of the present invention is configured to transfer a metal cask from the metal cask storage facility 10 to the metal cask storage facility expansion portion 11 via the inter-building transfer passage 12. .

  In the past, when the metal cask storage facility 10 was added, it was necessary to move the building between the buildings once by loading it on a trailer, so that the metal cask storage facility extension part 11 also needed a receiving building.

  However, in the configuration of the radioactive substance storage container transport facility according to the present invention, since the radioactive substance storage container transport facility is completely self-propelled, an additional building is not required for the additional building. In addition, handling equipment such as overhead cranes that handle metal cask can be reduced and simplified.

  FIG. 4 shows an example of application in the configuration of a storage facility in which a vault storage facility 15 is adjacently constructed adjacent to the metal cask storage facility 10 and connected by an inter-building transport passage 12. The metal cask 14 received at the metal cask storage facility is transported from the metal cask storage facility 10 to the vault storage facility 15 via the inter-building transport passage 12 by the air pallet transport system 13. The canister 16 accommodated in the metal cask is taken out from the metal cask inside the vault storage facility, and is transported to a predetermined place and stored.

  As described above, by carrying the air pallet carrying system 13 of the present invention between the storage facilities having different storage methods, no additional building is required in the added building. In addition, handling equipment such as overhead cranes that handle metal cask can be reduced and simplified.

  Furthermore, as shown in FIG. 5, when the power plant building 17 and the radioactive substance storage container storage facility 18 are constructed adjacent to each other and the buildings are connected by the inter-building transport passage 12, the power plant building 17 is tailored. By transporting the metal cask 14 which is a radioactive substance storage container via the inter-building transfer passage 12, all handling equipment such as an overhead crane necessary for receiving the metal cask of the radioactive substance storage container storage facility 18 can be deleted. Here, the metal cask 14 is all transported by the air pallet transport system 13.

  With the building configuration of the radioactive material storage container storage facility adopting the air pallet transfer system 13 which is the radioactive material storage container transfer facility as described above, the building ceiling height is reduced as compared with the method using the conventional overhead crane. At the same time, since the load for transporting the radioactive substance storage container is supported only by the floor surface, the building structure can be simplified, and the construction work and cost of the facility can be greatly reduced. In addition, the area required for transportation can be reduced, and the storage facility can be made compact.

  Moreover, since liquid air is used as a power source, even when the metal cask is moved by the air pallet transport system 13, only the vaporized air is discharged to the outside, so that the temperature in the storage facility is not increased. As a result, the storage facility is usually provided with a temperature monitoring monitor for monitoring the state of the metal cask. However, according to the present invention, the metal cask can be moved without disturbing the measurement of the temperature monitoring monitor. .

  Furthermore, in the present invention, when vaporized air is produced from the liquid air cylinder, the liquid air is converted into gas by the vaporizer, so that the temperature from the liquid air cylinder to the vaporizer can be stabilized constantly. Yes. Thereby, since the temperature of the liquid air cylinder part becomes constant, the cylinder can be easily converted and replenished, and maintenance can be easily performed even when the air pallet transport system is used for a long time.

  FIG. 6 is a view showing another structure of the radioactive substance storage container transport facility of the present invention.

  As shown in FIG. 6, in the embodiment of the present invention, in the radioactive substance storage container transport facility, compressed air is supplied from the compressed air cylinder 22 to the air pallet 3.

  In the air pallet 3, compressed air is blown out from below and an air film is formed between the air pallet 3 and the friction coefficient is reduced. Depending on the state of the floor surface, about 1 / The load required for movement from 1000 to 1/100 can be reduced. Thereby, even if the radioactive substance storage container 1 has a large weight exceeding 100 t, it can be transported by equipment having a small driving force. Furthermore, compared with the overhead crane which is the conventional conveyance equipment, it has a low lift and can eliminate the influence of dropping.

  The compressed air supplied from the compressed air cylinder 22 is supplied not only to the air pallet 3 but also to a driving device 8 that drives the driving wheel 7 of the radioactive substance storage container transport facility of the present invention. The driving device 8 has a configuration that generates a driving force by an air motor.

  The air pallet 3 is connected to the driving device 8 by an air pallet joint portion 9, and the air pallet that is lifted by the supply of compressed air is not restricted in movement in the vertical direction by the air pallet joint portion 9, but in the horizontal direction. The movement is regulated, and the driving force is transmitted to the air pallet 3 without generating unnecessary stress on the driving device 8.

  With such a configuration, the air pallet transfer system 13 can be simplified in configuration as shown in other embodiments. However, depending on the capacity of the compressed air cylinder 22, there may be a case where the transport distance cannot be obtained as compared with other embodiments. For this reason, when making a conveyance distance long, it is necessary to enlarge an apparatus.

  In the radioactive substance storage container transport facility of the present invention, a completely self-propelled configuration in which the radioactive substance storage container 1 is transported together with the storage rack 2 after the radioactive substance storage container 1 is fixed to the storage rack 2 can be realized.

  Note that such a radioactive substance storage container transport facility of the present invention can also be applied as an air pallet transport system in the above-described embodiments of FIGS.

  3 to 5 also reduce the building ceiling height compared to the conventional method using an overhead crane due to the building configuration of the radioactive substance storage container storage facility employing the air pallet transfer system 13. At the same time, since the load for transporting the radioactive substance storage container is supported only by the floor surface, the building structure can be simplified, and the construction work and cost of the facility can be greatly reduced. In addition, the area required for transportation can be reduced, and the storage facility can be made compact.

  Further, by carrying the air pallet carrying system of the present invention between storage facilities having different storage methods, the additional building does not need a receiving building. In addition, handling equipment such as overhead cranes that handle metal cask can be reduced and simplified.

The figure which shows the Example of the radioactive substance storage container conveyance equipment of this invention. The figure which shows the example of application of the Example of the radioactive substance storage container conveyance equipment of this invention. The figure which shows another example of application of the Example of the radioactive substance storage container conveyance equipment of this invention. The figure which shows another example of application of the Example of the radioactive substance storage container conveyance equipment of this invention. The figure which shows another example of application of the Example of the radioactive substance storage container conveyance equipment of this invention. The figure which shows another Example of the radioactive substance storage container conveyance equipment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Radioactive material storage container, 2 ... Storage stand, 3 ... Air pallet, 4 ... Vaporizer, 5 ... Heater power supply, 6 ... Liquid air cylinder, 7 ... Drive wheel, 8 ... Drive device, 9 ... Air pallet joint part, DESCRIPTION OF SYMBOLS 10 ... Metal cask storage facility, 11 ... Metal cask storage facility expansion part, 12 ... Inter-building conveyance passage, 13 ... Air pallet conveyance system, 14 ... Metal cask, 15 ... Vault storage facility, 16 ... Canister, 17 ... Power plant building , 18 ... radioactive substance container storage facilities, 2 2 ... compressed air cylinder.

Claims (6)

An air pallet that reduces the coefficient of friction of the radioactive material storage container;
In the radioactive substance storage container transport facility provided with a drive device for moving the radioactive substance storage container,
Comprising compressed air supply means for supplying compressed air to the air pallet and the driving device;
In order to enable the radioactive substance storage container to be conveyed independently, the compressed air supply means supplies compressed air using liquid air. In claim 1,
A radioactive substance storage container transport facility, wherein the compressed air supply means uses a power source for a vaporizer that generates compressed air from liquid air. An air pallet that reduces the coefficient of friction of the radioactive material storage container;
In the radioactive substance storage container transport facility provided with a drive device for moving the radioactive substance storage container,
Comprising compressed air supply means for supplying compressed air to the air pallet and the driving device;
In order to enable conveying the radioactive substance container independently, the radioactive substance container carrying facility and supplying the compressed air by using only compressed air cylinder as the compressed air source means. In claims 1 and 3,
By means of an air pallet transport system that can transport radioactive material storage containers independently with compressed air supply means, via a transport passage between buildings connecting the radioactive material storage container storage facility and the additional radioactive material storage container storage facility A radioactive substance storage container transport facility characterized by transporting a radioactive substance storage container. In claim 4,
The radioactive substance storage container storage system, wherein the existing radioactive substance storage container storage facility is a metal cask type, and the added radioactive substance storage container storage facility is a vault storage type. In Claim 1, 3, the radioactive substance storage container provided with the compressed air supply means can be conveyed independently.
An efficient air pallet transfer system connects the power plant building and the radioactive material storage container storage facility.
Self-propelled, characterized in that it transports radioactive material containers through the inter-building transport path
Type radioactive material container transport equipment.

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