JPH1090464A - Accepting equipment for radioactive material container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain effective use of site, improve transportability of container and ensure container control by arranging in the reactor power plant site, the reactor building, a storage place for radioactive material containers and an isolation transportation means connecting them and transporting the container by isolating from the air. SOLUTION: An isolation transportation means L constituted over a reactor power plant K and a storage place M has a connecting transportation path 12 surrounded with isolation walls for transportation. The transportation path 12 is formed with partition in an upper trench 12A and a lower trench 12B and an open hatch is arranged in the partition wall 13 partitioning them. At a position above the transportation path 12, a delivery building 16 connecting to the upper trench is placed. Radioactive material container C of glass solid packages and spent fuel assemblies is transported in the trench 12A or trench 12B according to the radiation intensity and the like, contained in the storage place M according to the radiation level and carried outside the site through the outlet of the building 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility for receiving a radioactive material container, and more particularly, to storing a radioactive material container in a site of a nuclear power plant and carrying out the radioactive material container with an external facility. It is related to technology that facilitates entry.

[0002]

2. Description of the Related Art Japanese Utility Model Laid-Open No. 03-020000 and Japanese Utility Model Laid-open No. 03-025200 relate to a technology for storing or storing radioactive waste or spent fuel generated in a nuclear power plant or the like, or a technology for transferring the same to a target facility.
No. 03-030900, 3-12
5299, JP-A-3-273193, JP-A-6
-324199 and JP-A-8-029584 have been proposed.

In these technologies, a vitrified package (a radioactive material storage body) or a spent fuel assembly loaded in a storage container (a radioactive material storage body) is transferred from a nuclear power plant to the outside. It is carried out, stored in a storage tube in a cell room of a storage, cooled by use of natural convection or forced cooling, and the radioactive substance storage is stored and stored for a required period.

[0004]

However, in these technologies for storing and storing radioactive material containers, it is difficult to secure a new construction site for receiving equipment, a reduction in the price of uranium fuel, and an increase in plutonium. In addition to the long-term storage in consideration of the decrease in demand for fuel, the transportation between various facilities and the storage of radioactive materials based on the reprocessing of spent fuel assemblies, storage by radiation dose or geological disposal, etc. The body needs to be replaced.

[0005] The present invention has been made in view of such circumstances, and aims to achieve the following objects. 1) To make effective use of the site of the nuclear power plant. 2) To improve transportability between the reactor building and storage. 3) The radioactive material container should be manageable according to the purpose of treatment and use. 4) To improve the workability of loading and unloading the radioactive material container between the nuclear power plant and the outside. 5) Ensuring the isolation of radioactive material containers on the site of nuclear power plants.

[0006]

Means for Solving the Problems A nuclear reactor plant is provided with a nuclear reactor building and a storage for storing radioactive material storage bodies, and these are placed between the nuclear reactor building and the storage. Isolation / transportation means for connecting and transporting the radioactive substance storage body while being isolated from the atmosphere is provided. As the separation and transfer means, one having a transfer separation wall disposed between the reactor building and the storage, and a connection transfer path disposed in a state surrounded by the transfer separation wall is applied. Is done. In the connection transport path, an open / close hatch that has an upper trench and a lower trench that are arranged in a plurality in parallel and is formed at least vertically and that can connect both to a partition wall of the upper trench and the lower trench Is arranged. The upper trench is connected to a loading / unloading building, and the loading / unloading building is provided with a loading / unloading port for loading / unloading a radioactive substance storage body or the like with / from the outside. In the reactor building, a decontamination facility for decontaminating the radioactive substance storage body is arranged in a state of being connected to the separation and transportation means. A transfer truck for mounting and transporting the radioactive substance storage body is disposed in the isolated transport means, and the storage is connected to the isolated transport means and takes in the radioactive substance storage body mounted on the transfer vehicle. And a container inspection room for inspecting the soundness of the radioactive material container, and the container inspection room is connected to the cell room of the storage.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a facility for receiving a radioactive material container according to the present invention will be described below with reference to FIGS.
This will be described with reference to FIG.

1 to 3, reference numeral C denotes a radioactive substance storage body, D denotes a transport container (cask), K denotes a nuclear power plant, L denotes an isolated transportation means, and M denotes a storage.

As described above, the radioactive substance storage body C is a vitrified package or a spent fuel assembly loaded in a storage container, and the transport container D is designed in consideration of heat dissipation. A structure in which a required number is housed in a sealed state and can be used for long-distance transportation between the nuclear power plant K and the outside is applied.

As shown in FIGS. 1 and 2, the nuclear power plant K includes a reactor building 1, a reactor 2, a fuel pool 3 and a cask pit 4 disposed therein, a decontamination facility 5, And a decontamination tank 6 disposed in the decontamination equipment 5, which is disclosed in
No. 029584 is also applied.

As shown in FIGS. 1 to 3, the isolated transportation means L is disposed between the nuclear power plant K and the storage M.
Is constructed together with the storage M on the premises. The isolation / transportation means L includes a transport isolation wall 11 that straddles the nuclear power plant K and the storage M to isolate a connection portion from the surrounding environment, and a state surrounded by the transport isolation wall 11. And a connection transport path 12 to be arranged.

The connection transport path 12 has at least an upper trench 12A and a lower trench 12B which are divided into a plurality of parallel states and are formed at least vertically.
An opening / closing hatch 14 is provided on a partition wall 13 that partitions the upper trench 12A and the lower trench 12B, so that the radioactive material container C and other devices can be transferred between the two.

Further, as shown in FIG. 2, the connection transfer path 12 is set so that a part thereof enters the decontamination equipment 5 and the storage M which are connected to the reactor building 1. Is set.

Further, a transport container D or a radioactive material container C is provided in the upper trench 12A and the lower trench 12B.
And a transfer carriage 15 for transporting the entire area of the connection transport path 12. The transfer cart 15 is shown in FIG.
As shown in FIG. 2, a device capable of transferring between the decontamination equipment 5, the isolation transport means L and the storage M while holding the transport container D in an upright state is applied.

On the other hand, a loading / unloading building 16 connected to the upper trench 12A is installed above the connection transport path 12. The loading / unloading building 16 has a loading / unloading chamber 17 having a work floor 17a at the same height as the ground G, and transporting the transport container D or the radioactive material storage C disposed in the loading / unloading chamber 17 to / from an external facility. Carriage entrance 18 to enter
An access port 19 opened in the work floor 17a,
The upper trench 12A is located below the access port 19 and
Opening and closing hatch 21 for enabling the transport container D or the radioactive material container C to be transferred between the container operation chamber 20 disposed at a position above the container operation chamber 20, the operation floor 20a of the container operation chamber 20, and the upper trench 12A. And a transfer work crane 22 having the carry-in / out room 17 and the container operation room 20 as working areas.

For the storage M, for example, the techniques described in Japanese Unexamined Utility Model Publication No. 3-125299 and Japanese Unexamined Patent Publication No. 3-273193 introduced in the prior art described above are applied mutatis mutandis. As shown in FIG.
Is assumed to be installed in a state of connection with the decontamination equipment 5 and the separation conveyance means L via the connection conveyance path 12 in FIG.

For this reason, in the storage M, according to the above-mentioned conventional technique, the cell chamber 31, the concrete wall 32 for isolating the cell chamber 31, and the transport for transporting the radioactive material storage C are carried out. The chamber 33, the ceiling slab 34 interposed between the cell chamber 31 and the transfer chamber 33, the storage pipe 35 for storing the radioactive substance storage body C, and the heat radiation of the storage pipe 35 by natural air cooling or forced cooling. A closing lid 37 for inserting and removing the radioactive material storage C through the cooling equipment 36 and the ceiling slab 34 is provided. In addition to these, the radioactive material storage sent to (or carried out of) the transfer chamber 33 is provided. A container inspection room 41 for inspecting the soundness of C (for example, measurement of radiation dose), an openable / closable access port 42 for connecting the connection transport path 12 and the container inspection room 41,
Handling means 43 for pulling out or storing the radioactive material storage body C between the inside of the transport container D and the like are arranged.

As shown in FIG. 3, the storage body inspection room 41 includes, as devices constituting the handling means 43,
A handling crane 43a for vertically moving and traversing the connection transport path 12 to the upper trench 12A and the lower trench 12B, and an opening for opening and closing the lid of the transport container D supported by the handling crane 43a. A mechanism 43b, a manipulator 43c attached to the opening mechanism 43b for performing various operations, a transfer crane 44 for traversely transferring the radioactive material storage C, etc., and a radioactive material storage C before and after the inspection. A temporary mounting base 45 for temporarily mounting in a state of being sorted based on a difference in amount or the like is provided. An open / close hatch 46 is provided between the transfer chamber 33 and the container inspection chamber 41 to connect them.

In the facility for receiving a radioactive material container configured as described above, the loading / unloading of the radioactive material container C as described below depends on the type of the radioactive material container C and the purpose of processing. Is performed.

[Storage of Spent Fuel] When the radioactive material container C stored in the fuel pool 3 is carried into the cell chamber 31, the spent fuel X in the fuel pool 3 is stored in the cask pit 4. For example, in a state of being housed in the transport container D, it is transferred to the decontamination tank 6 of the decontamination equipment 5 to perform necessary decontamination,
2, since the spent fuel X has a high radiation dose in the normal case, it is mounted on the transfer carriage 15 of the lower trench 12B via the opening / closing hatch 14 and the lower part of the storage body inspection room 41 in the storage M To the position, the upper opening of the transport container D is opened by the operation of the opening mechanism 43b in the handling means 43, and the radioactive material container C is suspended and extracted by the transfer crane 44. Carry in.

Then, the radioactive substance container C is inspected for radiation dose and the like to confirm the presence / absence of abnormality, soundness, etc., and if necessary, selected and the like, sorted into the temporary mounting stand 45, etc. Of the radioactive material container C to be placed and stored in the storage chamber M of the storage M via the opening / closing hatch 46, stored in the storage pipe 35, and closed by the closing lid 37. Is performed. In the radioactive substance container C, management such as setting a storage position according to the magnitude of the radiation dose is performed.

[Storage of Vitrified Material] When a radioactive substance storage C having a relatively small radiation dose, for example, a radioactive substance storage C such as a vitrified substance carried into the loading / unloading building 16 is carried into the cell chamber 31. The transport container D loaded into the loading / unloading chamber 17 is connected to the connection transport path 12 via the access port 19 and the opening / closing hatch 21 by the operation of the transfer work crane 22.
Is suspended in the upper trench 12A, and is mounted on the transfer carriage 15 and transferred to a lower position of the storage body inspection room 41 in the storage M. Thereafter, as in the above-described case, the radioactive substance container C is suspended from the transport container D by the handling means 43 and the transfer crane 44, and is taken out.
1 and storage according to the radiation dose level is performed.

[Transportation of Radioactive Material Container] The radioactive material container C of, for example, spent fuel X stored in the storage M
Is transported out of the premises of the nuclear power plant K, the radioactive material container C is transferred to the transfer chamber 33 and the open / close hatch 46.
Are transferred to the container inspection room 41 via the cradle, and the radiation dose is measured as necessary. Those with a high radiation dose are in the lower trench 12B, and those with a low radiation dose are in the upper trench 12A. , And transfer trolley 1
While being sealed in the transport container D prepared in 5,
Transfer to just below the open / close hatch 21 of the loading / unloading building 16,
After being hung by the transfer work crane 22 to the carry-in / out room 17 to be placed in a horizontal state, it is temporarily stored on the work floor 17 a via the access port 19. The transport container D in the temporarily stored state is transported to a reprocessing facility or the like outside the premises of the nuclear power plant K via the loading / unloading port 18 by a transport trailer (transport truck) or the like. In addition, even when the radioactive substance storage container C is carried out, it is desirable to use the lower trench 12B for those having a high radiation dose and the upper trench 12A for those having a low radiation dose.

As described above, when the radioactive substance storage body C is stored in the storage tube 35 of the cell chamber 31 or when it is taken out, it is determined whether the radioactive substance storage body is a spent fuel or a vitrified body according to the radiation dose level. Of the upper trench 12 in the connection transport path 12 in accordance with the
A and the lower trench 12B can be used simultaneously in parallel, and can be selectively used. Note that the open / close hatch 14, the open / close hatch 21, the access port 42, and the like provided in the connection transport path 12, the nuclear power plant K, and the storage M are opened to store radioactive materials in the vertical direction. The setting is made so that the body C and the transport container D can be transported, and by keeping the body C and the transport container D closed, contamination by radioactive substances with a high radiation dose can be suppressed.

[0025]

According to the facility for receiving a radioactive substance container according to the present invention, the following effects can be obtained. (1) Reactor building,
By arranging the storage and the isolated transportation means for connecting them, it is possible to easily secure the construction site such as the storage and to effectively use the site of the nuclear power plant. (2) By arranging the separation and transportation means isolated from the atmosphere between the reactor building and the storage, the transportability of the radioactive substance storage body can be improved. (3) The connection transport path has an upper trench and a lower trench which are vertically formed, and a plurality of these trenches are arranged in parallel so that they are divided according to the radiation dose level of the radioactive substance container. Transport, and the transport path can be specified to prevent diffusion of radioactive material. (4) By providing an isolated transporting means for connecting these between the reactor building and the storage, the radioactive material storage body can be easily managed according to the processing purpose and use. (5) The transport path of the isolated transport means is connected to the loading / unloading building, and the loading / unloading building is provided with a loading / unloading entrance, thereby improving the loading / unloading workability of the radioactive material storage body between the nuclear power plant and the outside. Can be improved. (6) By connecting the isolated transportation means and the cell room of the storage via the storage body inspection room, the management of the radioactive material storage body can be ensured, and the soundness of the entire facility can be improved.

[Brief description of the drawings]

FIG. 1 is a partially omitted perspective view showing an embodiment of a receiving facility for a radioactive substance storage body according to the present invention.

FIG. 2 is a front sectional view showing a model of an embodiment of a receiving facility of a radioactive substance storage body according to the present invention.

FIG. 3 is a perspective view in which a part of a connection state of a separated transporting unit and a storage in FIG. 1 is omitted.

[Explanation of symbols]

 X Spent fuel C Radioactive material container D Transport container (cask) K Nuclear power plant L Isolation / transportation means M Storage room G Above ground 1 Reactor building 2 Reactor 3 Fuel pool 4 Cask pit 5 Decontamination facility 6 Decontamination tank 11 Transport isolation wall 12 Connection transport path 12A Upper trench 12B Lower trench 13 Partition wall 14 Opening / closing hatch 15 Transfer trolley 16 Carrying in / out building 17 Carrying in / out room 17a Work floor 18 Carrying in / out 19 Access opening 20 Container operating room 20a Operation floor 21 Opening / closing hatch 22 Transfer work crane 31 Cell room 32 Concrete wall 33 Transfer room 34 Ceiling slab 35 Storage pipe 36 Cooling equipment 37 Closure lid 41 Storage body inspection room 42 Access port 43 Handling means 43a Handling crane 43b Opening mechanism 43c Manipulator 44 Transfer tool Lane 45 Temporary stand 46 Opening / closing hatch

Claims (7)

[Claims] Claims: 1. In a site of a nuclear power plant (K),
A state in which a reactor building (1) and a storage (M) for storing a radioactive material storage body (C) are arranged, and these are connected between the reactor building and the storage to be isolated from the atmosphere A receiving means for receiving the radioactive material container, wherein an isolating transport means (L) for transferring the radioactive material container is provided in the apparatus. 2. An isolation transportation means (L) surrounded by a transportation isolation wall (11) disposed between the reactor building (1) and a storage (M), and the transportation isolation wall. 2. A facility for receiving a radioactive substance container according to claim 1, further comprising a connection transport path arranged in a state. 3. The receiving of the radioactive substance container according to claim 2, wherein the connection transport path (12) has at least an upper trench (12A) and a lower trench (12B) partitioned vertically. Facility. 4. The radioactive substance storage according to claim 3, wherein an opening / closing hatch (14) for connecting the upper trench (12A) and the lower trench (12B) is provided on a partition wall. Body receiving equipment. 5. An upper / lower trench (12A) is connected to a loading / unloading building (16), and a loading / unloading port (18) for loading / unloading the radioactive material container (C) or the like with the loading / unloading building. ) Is arranged.
Receiving facility for the radioactive material container described in the above. 6. The storage (M) is provided with a handling means (43) connected to the isolated transport means (L) and for picking up the radioactive material container (C). A facility for receiving a radioactive substance container according to 1, 2, 3, 4 or 5. 7. A storage body inspection room (41) for checking the soundness of a radioactive substance storage body (C) in a storage (M).
And the container inspection room is connected to the cell room (31) of the storage.
Or a facility for receiving a radioactive substance container according to 6.