JP6910903B2 - How to transport and store the transported goods in the turbine building - Google Patents

Description

An embodiment of the present invention relates to a method for transporting a transported material such as radioactive waste in a turbine building.

Commercial nuclear power plants that have reached the end of their operating life will be decommissioned in accordance with the provisions of the law. The decommissioning measures are expected to decontaminate the system as necessary and dismantle and remove it after a safe storage period (5 to 10 years).

In the dismantling and removal work, a large amount of waste contaminated with radioactive substances is generated. If this waste cannot be stored outside the facility subject to decommissioning, it is necessary to carry out demolition work, waste storage, etc. in parallel in the limited space inside the facility such as the reactor building and turbine building. ..

Such demolition work and waste storage are not limited to one floor, for example, in a turbine building having a plurality of floors including an operating floor, and the area of other floors such as the upper floor and the basement floor is maximized. It is required to utilize it.

In Patent Document 1, the existing tunnel (main steam tunnel) that directly connects the reactor building and the turbine building is used as a waste transport passage, and the waste generated by the decommissioning is transported to the turbine building to build the turbine. A method for dismantling a nuclear power plant that shreds and decontaminates waste indoors and stores it in a container is disclosed.

Japanese Unexamined Patent Publication No. 2010-8091

In the above prior art, it has been proposed to utilize an existing tunnel in the facility as a route for transporting radioactive waste, shred it, decontaminate it, and store it in a container inside the turbine building.

However, regarding the treatment of radioactive waste shredding, decontamination, container storage, storage, etc. in the turbine building, how to transport and move radioactive waste, equipment, people, etc. between treatment areas Not mentioned.

An embodiment of the present invention has been made to solve the above problems, and provides a transport storage method utilizing an existing structure for transporting and moving radioactive waste, materials and equipment, people, etc. in a turbine building. The purpose is to do.

In order to solve the above problems, the method of transporting and storing the transported material in the turbine building according to each embodiment is provided with a plurality of floors including an operating floor , an intermediate floor, and a basement floor in that order, and a plurality of openings, and the turbine is provided. And / or a method of transporting a transported object in a turbine building having a base base on which equipment including a generator is installed and equipment including a water recovery device installed below the equipment. A step of removing the equipment including the generator, a step of removing the equipment including the water recovery device, and a radioactive waste treatment step of decontaminating and solidifying the transported material in the radioactive waste treatment area on the intermediate floor. And the storage process in which the transported object whose radioactivity concentration has been measured is transported and stored in the storage area on the basement floor, and the space that appears after the equipment is removed is used as a transport route by the transport means between the plurality of floors. It is characterized by having a step of transporting the transported object.

According to the embodiment of the present invention, an efficient transportation and storage method utilizing the existing structure is provided for the transportation and movement of radioactive waste, materials and equipment, people, etc. in the turbine building at the time of decommissioning of the nuclear power plant. can do.

Cross-sectional view of the turbine building before the removal of various equipment. Cross-sectional view of the turbine building after the removal of various equipment. Top view of the foundation. A perspective view of the foundation. The explanatory view of the transport work in 1st Embodiment. The explanatory view of the transport work in 2nd Embodiment. (Part 1) The explanatory view of the transport work in 2nd Embodiment. (Part 2) The explanatory view of the transport work in 2nd Embodiment. (Part 3) The figure which shows the transfer processing process in 3rd Embodiment. The explanatory view of the transport work in 3rd Embodiment.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
(First Embodiment)
The method of transporting the transported object 10 in the turbine building according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 5.

[Constitution]
FIG. 1 is a cross-sectional view of the turbine building before removal of equipment including a turbine, a generator and a condenser.
The turbine building 1 is formed with a plurality of floors such as an operating floor 3, an intermediate floor 4, and a basement floor 5, for example.

On the operating floor 3, equipment including a turbine and a generator (hereinafter, also referred to as “turbine or the like”) 6 is installed via a base 7.
A condenser 9 penetrates the middle floor 4 and is installed in the basement floor 5 below the turbine and the like 6. The condenser 9 is supported by the base 7.

For example, a vertical garter 2-1 and two horizontal garter 2-2 are installed on the ceiling of the turbine building 1 in the direction perpendicular to the vertical garter 2-1. You can move guided by 2. Further, an overhead crane 11 is installed on the vertical garter 2-1 and can move on the vertical garter 2-1.

FIG. 2 is a cross-sectional view of the turbine building after the turbine and the like 6 and the condenser 9 have been removed (indicated by the dotted line). FIG. 3 is a plan view of the base 7 and FIG. 4 is a perspective view thereof.
The foundation base 7 is, for example, a turret-like structure having 6 pairs of legs, and is installed on the basement floor 5. The upper surface of the foundation base 7 is substantially on the same surface as the operating floor 3, and a plurality of openings 8-1 for installing the turbine and the like 6 and connecting the condenser 9 are provided. The shape of the foundation base 7 and the number of openings 8-1 are formed in 4 to 5 in a normal boiling water reactor, but can be appropriately changed according to the size of the turbine and the number of stages.

[Action]
Next, the operation of transporting radioactive waste will be described with reference to FIGS. 2 and 5.
As shown in FIG. 2, after removing the turbine and the like 6 and the condenser 9, the plurality of openings 8-1 formed in the base 7 and the empty space 8-2 after the removal of the condenser 9 Space 8 appears.

In the present embodiment, the plurality of spaces 8 extending in the vertical direction of the foundation base 7 are used as a transport path for transporting the transportable objects 10 such as waste, materials and equipment, and people in the turbine building. Since a plurality of transport paths can be secured by the plurality of spaces 8, it is possible to transport and move to each area on each floor of the turbine building in the shortest distance.

FIG. 5 uses an existing overhead crane 11 as a transport means in the space 8, and can transport the transported object 10 without newly installing a transport facility.
Since two or more overhead cranes 11 are installed in a normal turbine building, two large and small overhead cranes can be used according to the size of the object to be transported. For example, the overhead crane 11 is used to transport the transported object 10 from the operating floor 3 to the intermediate floor 4 and the basement floor 5 through the space 8. If the lift of the overhead crane 11 is insufficient, it can be transported by modifying it by interposing a long member or the like.

Further, if a transport facility such as a forklift 18 that moves horizontally in the building is installed on the intermediate floor 4 and the basement floor 5, the transport material 10 such as waste and materials and equipment can be transported on each floor of the turbine building. .. In FIG. 5, the legs of the foundation base 7 are omitted (the same applies to FIGS. 6, 7, 8 and 10).

[effect]
As described above, according to the present embodiment, the plurality of spaces 8 appearing after the turbine and the like 6 and the condenser 9 are removed can be used for the transport and movement paths of the transported objects 10 in the turbine building, and a plurality of spaces 8 can be used. Since a plurality of routes can be secured by the space 8, it is possible to transport and move to each area on each floor of the turbine building in the shortest distance.
Further, the existing overhead crane 11 can be used as the transporting means of the space 8, and the transported object 10 can be transported between the floors of the turbine building without newly installing the transport equipment.

(Second embodiment)
The method of transporting the transported object 10 in the turbine building according to the second embodiment of the present invention will be described with reference to FIGS. 6 to 8.

In normal transportation, the existing overhead crane 11 is used, but there are cases where efficient transportation cannot be achieved with the overhead crane 11 alone, or there are cases where workers are moved. In that case, a new transportation facility is installed.

In this embodiment, a transport facility is newly installed using the upper surface of the base 7 and the space 8. Other configurations are the same as in the first embodiment.
Examples of the newly installed transport equipment include equipment and materials, a crane 12 for waste (Fig. 6), an elevator 13 for workers and equipment and materials (Fig. 7), and a combined use of a crane 12 and an elevator 13 (Fig. 8). ..

The crane 12 is installed, for example, installed on the upper surface of the foundation base 7 so that the cross-sectional gate-shaped legs straddle the opening 8-1 and are fixedly installed. Regarding the elevator 13, for example, a guide rail 14 whose lower end is fixed to the basement floor 5 is supported and fixed to the foundation base 7, and the gauge of the elevator 13 is installed so as to pass through the opening 8-1.

According to the present embodiment, the newly installed crane 12 is installed on the base 7 across the opening 8-1, and the elevator 13 is installed in the opening 8-1 via the base 7. Therefore, in any of the transport facilities, the space 8 can be used as a transport path for the transport object 10 in the turbine building. In addition, the foundation work for installing the guide rail 14 and the like of the elevator 13 can be minimized.

(Third Embodiment)
A method of transporting the transported object 10 in the turbine building according to the third embodiment of the present invention will be described with reference to FIGS. 9 to 10.
In this embodiment, each floor and space 8 are used to show each process from the carry-in process to the storage process of the transported object 10.

FIG. 9 is an example of a transport processing step including steps a to d for transporting waste and the like generated at a dismantling site such as inside a nuclear reactor building.
The waste is cut and stored at the dismantling site and then transferred to the turbine building. After that, it is temporarily stored in the turbine building after being treated for waste such as decontamination and solidification, and inspected for waste such as measurement of radioactivity concentration.

The waste inspection facility 17 for inspecting waste, the waste treatment facility 16 for processing, the equipment for storage, etc. are inspected and treated by the existing overhead crane 11 or the like via the space 8 before the step a. It is carried to each floor of storage.

Hereinafter, the transport operation for transporting the transported material 10 such as waste based on the transport processing step including the steps a to d will be described with reference to FIG.
First, in step a, the transported material 10 such as waste dismantled, cut, and stored in the reactor building is carried into the operating floor 3 from the carry-in entrance 15 of the turbine building (T / B).

After that, in step b, the transported object 10 is vertically transported to the intermediate floor 4 by the newly installed crane 12 using the upper surface of the foundation base 7 using the space 8, and is treated by the waste treatment facility 16 installed in the intermediate floor 4. Is done.

After that, in step c, the processed material 10 is vertically transported to the basement floor 5 using the space 8 by the elevator 13 newly installed using the upper surface of the foundation base 7, and the waste installed in the basement floor 5 is used. The inspection equipment 17 measures the radioactivity concentration and the like.

Finally, in step d, the transported object 10 whose radioactivity concentration has been measured is horizontally transported and stored in the storage area installed in the basement floor 5.
When the transported object 10 is vertically transported, the existing overhead crane 11 can be used in combination, and when the transported object 10 is horizontally transported, a conveyor, a forklift 18, or the like is used. Further, in the step a, the transported object 10 is carried into the operating floor 3, but the carry-in floor may be another floor.

As described above, according to the present embodiment, when each floor is used as an area such as a waste treatment area, a waste inspection area, and a waste storage area, the space 8 is one of the routes for carrying in and out of the transported material 10. Can be used as.

Further, the basement floor 5 in which a large device such as a condenser 9 is installed has a large floor load and can secure a sufficient storage capacity, so that it can be used as a storage area. Further, by installing the waste treatment equipment 16 on the intermediate floor 4 and the waste inspection equipment 17 on the basement floor 5, the transportation route of the transported material 10 is not complicated, and the waste transportation processing process is surely and efficiently performed. Can be executed as a target.

Further, since there are a plurality of spaces 8, it is possible to easily secure an efficient transportation route to each area even if the required area usage and space are changed at each stage of decommissioning.

Although some embodiments and modifications of the present invention have been described above, these embodiments and the like are presented as examples and are not intended to limit the scope of the invention. These novel embodiments and the like can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

1 ... Turbine building, 2-1 ... Vertical garter, 2-2 ... Horizontal garter, 3 ... Operating floor, 4 ... Intermediate floor, 5 ... Basement floor, 6 ... Turbine and / or generator (turbine, etc.), 7 ... Foundation Table, 8 ... Space, 8-1 ... Opening, 8-2 ... Empty space, 9 ... Condenser, 10 ... Transport, 11 ... Existing overhead crane, 12 ... New crane, 13 ... New elevator, 14 ... Guide Rail, 15 ... Carry-in entrance, 16 ... Waste treatment equipment, 17 ... Waste inspection equipment, 18 ... Fork lift

Claims (4)

A plurality of floors including an operating floor , an intermediate floor, and a basement floor in that order , a base base on which a plurality of openings are provided and equipment including a turbine and / or a generator is installed, and a base base installed below the equipment. It is a method of transporting a transported object in a turbine building having equipment including a condenser.
The step of removing the equipment including the turbine and / or the generator, the step of removing the equipment including the water recovery device, and the decontamination and solidification treatment of the transported material in the radioactive waste treatment area on the intermediate floor. The plurality of floors have a radioactive waste treatment step, a storage step in which the transported material whose radioactivity concentration has been measured is transported to a storage area on the basement floor and stored, and a space appearing after the equipment is removed as a transport route. A method for transporting and storing a transported object in a turbine building, which comprises a step of transporting the transported object between the vehicles by a transporting means. The method for transporting and storing transported goods in a turbine building according to claim 1, wherein the transported material is radioactive waste, equipment for inspecting, processing or storing the radioactive waste, or personnel. The method for transporting and storing a transported object in a turbine building according to claim 1 or 2, wherein the transporting means is any one or more of an existing crane in the turbine building, a crane newly installed in the opening, and an elevator. A step of transporting equipment for inspecting, processing, or storing the transported object to any of the plurality of floors via the space, a step of transporting the transported object to the operating floor, and the transported object. 1. The method for transporting and storing the transported material in the turbine building described in the above.

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