JP3896538B2 - Geological disposal facility and waste disposal method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a geological disposal facility and a waste disposal method, and more particularly to a geological disposal facility and a disposal of a waste body that can stably and easily transport waste in a disposal tunnel while stably constructing an excavation section of the disposal facility. Regarding the law.
[0002]
[Prior art]
In the nuclear fuel cycle centered on nuclear power plants, in order to recycle spent fuel, spent fuel is transferred directly or via a recycle fuel storage center to a reprocessing plant, where uranium and plutonium are recovered. However, the radioactive waste that falls outside this fuel cycle is planned to be safely isolated and disposed of.
[0003]
Therefore, high-level radioactive waste is considered to be almost difficult to reuse at present, and because of its extremely long toxicity and half-life, radioactive waste is more than 10,000 years from the natural environment. It is considered to dispose of the quarantine for a long time.
[0004]
For this reason, in high-level radioactive waste storage facilities, it is decided to dispose of the waste in the geological disposal facility after storage for cooling the waste body, and the geological disposal facility is the final radioactive material that cannot be used. In order to dispose of the waste, as shown in FIG. 8, it is constructed as an underground facility having a depth of 300 m or below.
[0005]
The geological disposal facility 10 includes an underground facility section 1 and a vertical shaft 3 and an exhaust vertical shaft 4 that communicate with the ground receiving facility 2. The underground facility section 1 is composed of a plurality of disposal mine shafts 5 and a main mine shaft 6 connecting them, and the shaft 3 has a canister carry-in shaft 7, a personnel / material shaft 8, and an emergency shaft 9. .
[0006]
The geological disposal facilities are planned to be classified into two types of hard rocks and soft rocks such as sedimentary rocks, depending on the type of rock. Plane and horizontal placement methods are also used for the disposal of wastes. Are being considered, and technical studies on each facility are being conducted.
[0007]
The transportation of waste in the geological disposal facility 10 proposed so far is carried by branching the branching section between the disposal tunnel 5 and the main tunnel 6 in a skewed state as shown in the plane cross section of FIG. It is assumed that the smooth rail system is used.
[0008]
However, with respect to the shape of the branch portion 11 in the main tunnel 6 and the disposal tunnel 5, the following problems can be considered in terms of stability.
[0009]
(1) Since the branch part 11 between the tunnels has an acute angle, a thin portion is formed in the rock mass sandwiched between the two tunnels, and the rock mass is loosened, so that the stability cannot be maintained. The part which collapses and is cut off like the chain line part to be generated occurs.
(2) The cross-sectional shape of the branch portion 11 cut out of the mine shaft is larger than the single cross section of the main mine shaft 6 and the disposal mine shaft 5 as shown in FIG. 10 (a), as shown in FIG. 10 (b). A horizontally long section is generated.
(3) The stability of the main mine 6 and the disposal mine 5 having a large horizontal cross section becomes stricter than the main mine 6 and the disposal mine 5 when they are independent.
(4) The potential location of a geological disposal facility has a significant impact on the feasibility of the location conditions because the possible installation depth conditions (300m and deeper) become stricter.
(5) The loosened area of the rock around the bifurcation will be affected by the excavation of both tunnels and will appear as a larger spread than in the case of a single tunnel .
(6) The loosening region between adjacent branch portions of the main tunnel 6 and the disposal tunnel 5 becomes larger than the separation distance considering only the mechanical influence in the plurality of disposal tunnels.
[0010]
The above problems are to ensure that the shape of the branching section is as stable as possible in order to alleviate the restrictions on the candidate site for the geological disposal facility and the installation depth conditions, and for the waste that is suitable for that shape. It is necessary to use transport and disposal methods.
[0011]
[Problems to be solved by the invention]
The present invention is proposed in view of the above situation, while restricting the rock slack area without forming a thin portion at the branch between the tunnels in the geological disposal facility, the horizontal direction of the main tunnel and the disposal tunnel Disposal of geological disposal facilities and wastes that stabilize and facilitate transport in the main and disposal tunnels while preventing large cross-sections and improving the bifurcation structure of the main and disposal tunnels in the geological disposal facility Provides the law.
[0012]
[Means for Solving the Problems]
In the geological disposal facility according to the present invention, a waste body is held in a rectangular block, and the waste body held in the block is transported to a disposal tunnel branched from a main tunnel and placed at a predetermined position. A geological disposal facility, wherein the sealing body includes auxiliary support devices protruding from both ends in the longitudinal direction and equipped with tires on the lower surfaces of the respective protrusions, and the disposal tunnel is branched in a direction perpendicular to the main tunnel, and is intended to convey a state where the longitudinal direction of the sealed body is placed blockade body disposal tunnel transport vehicle with auxiliary support device in a manner crossing the tunnel axis disposal tunnel, further assist in the lining portion of the disposal tunnel An overhang portion is formed at a portion corresponding to the tire of the support device, and the tire of the auxiliary support device travels on the upper surface of the overhang portion when the blockade is transported by the disposal mine transport vehicle.
[0013]
This makes it possible to reduce the cross-section of the main tunnel and the disposal tunnel as much as possible, thereby reducing the rock loosening and damage area around the bifurcation by excavating the bifurcation, as well as the separation distance of the disposal tunnel and the area where waste is placed in the disposal tunnel Since the distance from the main tunnel can be reduced and the fixed installation area can be increased, efficient disposal can be performed.
[0014]
The disposal method of waste according to the present invention includes a main tunnel and a disposal tunnel branched in a direction perpendicular to the main tunnel, and the waste is retained in a rectangular block, and the predetermined disposal of the disposal tunnel is performed. A waste disposal method in which a blocking body is placed in a position in which the longitudinal direction is perpendicular to the shaft axis of the disposal tunnel, and the main tunnel extends to a transport carriage that moves along the extension direction of the main tunnel. Placing the disposal mine transport vehicle in a manner that proceeds in a direction orthogonal to the direction, and placing the sealing body on the disposal mine transport vehicle in a manner in which the longitudinal direction extends along the extending direction of the main mine shaft And a step of transporting the sealed body in the main tunnel through the transport carriage in a mode in which the longitudinal direction of the sealed body is along the traveling direction, and the disposal tunnel transport vehicle is lowered from the transport truck at a position corresponding to the predetermined disposal tunnel, through the formulation minute tunnel transport vehicle Characterized in that it comprises the step of conveying the chain body to a predetermined position of the disposal tunnel.
[0015]
Thereby, it becomes possible to make the branch part of a main tunnel and a disposal tunnel into a right angle. In addition, by branching the main tunnel and the disposal tunnel, the installation work in multiple disposal tunnels is possible, enabling efficient operation and operation. It is advantageous to use machinery, and the stability of the disposal mine and the entire disposal facility are reduced, so that the rock body that is the target of the disposal facility is reduced, and the economic efficiency is improved by expanding suitable land and reducing construction costs. ing.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
The geological disposal facility according to the present invention is a geological disposal facility in which waste is transported to a disposal tunnel branched from a main tunnel and placed at a predetermined position. The disposal tunnel is branched at a right angle from the main tunnel, and a lining portion of the disposal tunnel is formed. The auxiliary support part that supports the load of the waste body is constructed, and the distance between the disposal tunnels is reduced by reducing the loosening and damage area of the surrounding rock mass by excavating the branching section while minimizing the cross section of the main tunnel and the disposal tunnel. In addition, the placement start area of waste in the disposal tunnel is shortened from the main tunnel to increase the placement area.
[0017]
Hereinafter, embodiments of a geological disposal facility according to the present invention will be described in detail with reference to the drawings. In order to facilitate understanding, the same parts as those in the related art are denoted by the same reference numerals.
[0018]
FIG. 1 is a cross section of a main mine shaft and a disposal mine shaft in a geological disposal facility according to the present invention, and is a cross-sectional view taken along arrows (b)-(b) of a cross-sectional view (a) and a cross-sectional view (a). (B).
[0019]
The main mine shaft 12 and the disposal mine shaft 13 in this embodiment are branched at a right angle at the branch portion 14 as shown in FIG. As a result, the looseness in the rock around the branching portion 14 is limited to the minimum range and area, and both the mine shafts are constructed in a solid state that maintains stability.
[0020]
The main tunnel 12 and the disposal tunnel 13 are arranged with roadbed concrete 15 'and 15 in each tunnel as shown in FIG. 1 (b), so that the transport carriage in the main tunnel 12 and the disposal in the disposal tunnel 13 are disposed. Smooth movement of mine transport vehicles.
[0021]
Therefore, the positional relationship between the upper surface position of the roadbed concrete 15 ′ where the rails are installed and the roadbed concrete 15 for tires is different in shape, and the disposal mine transport vehicle in which the waste body is arranged as described later is used. The inclined surface 16 is configured by making the position of the roadbed concrete 15 higher than the upper surface of the roadbed concrete 15 ′ so that a smooth transition can be made in the direction of the disposal mine 13 as it is from the transport carriage.
[0022]
FIG. 2 is a cross-sectional view of the disposal tunnel in the present embodiment as viewed in the direction of arrows (2)-(2) in FIG.
[0023]
As shown in the figure, the disposal tunnel 13 in the present embodiment is composed of the roadbed concrete 15 and the lining 21 installed on the bottom surface as described above, and the overhanging portions 22 are provided on both sides of the lining 21. Is forming.
[0024]
The upper surface 23 of the overhanging portion 22 is formed as a road surface that facilitates traveling of the tire, or is formed as a roadbed for installing rails that facilitate the traveling of steel wheels. This makes it possible to support the load of the waste body in an auxiliary manner.
[0025]
As described above, the geological disposal facility according to the present invention branches the main mine shaft 12 and the disposal mine shaft 13 at a right angle at the branching portion 14 so that the cross section of the main mine shaft and the disposal mine shaft can be removed without a horizontally long section. While minimizing as much as possible, the rocks around the rock mass and the damaged area are reduced by excavating the bifurcation to improve the stability and facilitate the establishment of the site conditions.
[0026]
Furthermore, it is possible to reduce the distance between the disposal tunnels and the distance from the main tunnel in the waste placement start area in the disposal tunnel, and it is possible to increase the placement area, so efficient disposal is possible. It can be done.
Next, the disposal method of the waste body by this invention is demonstrated.
[0027]
In the above-mentioned geological disposal facility, the waste disposal method according to the present invention is arranged such that the waste is disposed in the disposal tunnel transport vehicle in a direction perpendicular to the traveling direction, and the disposal tunnel transport vehicle is parallel to the traveling direction of the main tunnel transport carriage. Is transported in the main tunnel, and when it reaches the predetermined disposal mine, the disposal mine transporter is moved in a direction perpendicular to the traveling direction and lowered into the disposal mine. The transport vehicle is transported into a disposal mine shaft, the waste body is lowered and placed at a predetermined disposal position, and the waste body is equipped with an auxiliary load supporting tool in its longitudinal direction.
[0028]
Below, the embodiment of the disposal method of the waste body by this invention is described in detail based on drawing.
[0029]
FIGS. 3 to 5 show an embodiment in which waste is transported in the main tunnel and the disposal tunnel, and FIG. 3 is a transport form diagram (a) of the waste in the main tunnel and the waste is transferred into the disposal tunnel. It is shown in the transport form diagram (b).
[0030]
As shown in FIG. 3A, the blocking body 33 is arranged in a direction perpendicular to the traveling direction of the disposal mine transport vehicle 17 in the disposal mine channel 13 with respect to the disposal mine transport vehicle 17. The disposal mine transport vehicle 17 is placed on the transport carriage 18 of the main mine shaft 12, and the sealed body 33 at that time is parallel to the direction in which the transport trolley 18 travels in the main mine shaft 12. Is arranged.
[0031]
Therefore, the transport of the sealing body 33 in the main mine shaft 12 can be performed smoothly without causing any obstacles to the periphery by keeping the longitudinal direction of the sealing body 33 along the traveling direction. I have to.
[0032]
Thus, the transport carriage 18 is pulled by the waste transport locomotive 19 and moves on the rail 20 in the main tunnel 12, and the disposal tunnel transport vehicle 17 corresponds to the disposal tunnel 17 as shown in FIG. 3 (b). For each disposal tunnel 13, it is lowered into the disposal tunnel only by translating in the direction perpendicular to the traveling direction.
[0033]
Thereby, the disposal work of the waste body in each disposal mine channel 13 can be performed independently irrespective of other disposal work, and the work efficiency is improved.
[0034]
FIG. 4 is a transport configuration diagram of waste bodies in the main tunnel and the disposal tunnel in the direction of arrows (4)-(4) in FIG.
[0035]
Since the disposal mine transport vehicle 17 in which the waste body in the present embodiment is disposed has the traveling direction in the same direction as the formation direction of the disposal mine tunnel 13, it is shifted from the transport carriage 18 in the main tunnel 12 in the lateral direction. As such, it is easily transported into the disposal tunnel 13.
[0036]
That is, since the height position of the transport carriage 18 matches the position of the raised roadbed concrete 15, the disposal tunnel transport vehicle can smoothly move from the transport carriage to the disposal tunnel 13 as it is by parallel movement. It is easily conveyed to the position of the roadbed concrete 15 via the inclined surface 16 .
[0037]
The remaining disposal tunnel transport vehicle 17 is placed on the transport carriage 18 in the main tunnel 12, and the blocking body 33 is parallel to the direction in which the transport carriage 18 travels in the main tunnel 12. Therefore, as shown in the figure, the disposal mine transport vehicle 17 is arranged in a direction orthogonal to the traveling direction.
[0038]
Further, in the present embodiment, as described with reference to FIG. 2, the overhang portions 22 are formed on both sides of the lining 21 constituting the disposal mine 13, and the upper surface 23 facilitates running of the tire. Since it is formed as a road surface, the overhanging portion 22 makes it possible to support the load of the waste body in an auxiliary manner.
[0039]
As shown in FIG. 5, the sealing body 33 at this time is reinforced by being integrated with an auxiliary support device 24 made of truss, and the auxiliary support device 24 has tires 25 at both ends of the auxiliary support device 24. Is supported by the upper surface 23 of the overhanging portion 22.
[0040]
Therefore, the load of the sealing body 33 is shared by the disposal mine transport vehicle 17 equipped with the tire 26 and the auxiliary support device 24 equipped with the tire 25, and the roadbed concrete having a strength corresponding to each. By constructing 15 and the overhanging portion 22, it is possible to reduce the overall cost.
[0041]
Disposal of waste in the present embodiment is performed by the following steps.
FIG. 6 is a cross-sectional view (a) showing an embodiment of a disposal tunnel when a geological disposal facility according to the present invention is applied to a soft rock formation, and an embodiment (b) of a sealed body filled with a waste body 32 . is there.
[0042]
The disposal tunnel 13 in the present embodiment has a bottom portion 30 formed in an arc shape with a predetermined radius, and its side portion 31 is also formed in an arc shape having a radius different from that of the bottom portion 30. An overhang portion 22 is formed on the upper surface 23 of the road surface as a road surface that facilitates running of the tire.
[0043]
As a result, since the disposal tunnel 13 has a larger cross section than the conventional horizontal installation method, disposal of the waste in the disposal tunnel 13 allows space and use of a large machine. The operation is facilitated by facilitating operability when placing the sealed body filled with the waste body.
[0044]
The sealing body 33 filled with the waste body 32 has a waste body 32 and a buffer material 37 for stably holding the waste body 32 in a rectangular steel container 36 in advance, as will be described in detail in a partial sectional view (b). As a result, the waste body 32 is placed in a predetermined position in the disposal tunnel 13 together with the auxiliary support device 24 and is surely buried and disposed.
[0045]
As a disposal form, it is arranged horizontally in the cushioning material 34 filled in the disposal mine 13, but the direction of the transverse is different from the conventional lateral placement method and intersects the shaft of the mine shaft. Arranged.
[0046]
Therefore, since the arrangement interval of the sealing body 33 is performed in a higher density state than the arrangement interval of the conventional horizontal placement method, it can be arranged at a narrower interval than the case of the vertical placement method, and is discarded. The disposal density of the body can be greatly increased.
[0047]
As described above, the sealing body 33 is held in the buffer material 34 filling the disposal tunnel 13, but the arrangement first buffers the range constituting the pedestal 35 below the sealing body 33. The position where the sealing body 33 is disposed by being filled with the material 34 is stably secured.
[0048]
Next, by continuously filling the upper portion of the arranged sealing body 33 and the position of the sealing body arranged next at a predetermined interval with the buffer material 34, one sealing body 33 is fixed. This is the standard form of work.
[0049]
FIG. 7 shows a specific process of placing the sealed body, and the placing of the sealed body 33 is reliably performed by placing the sealed body 33 carried on the pedestal 35.
[0050]
After the blockade 33 is placed, the space from the upper part of the blockage 33 to the position of the blockage indicated by the imaginary line scheduled to be placed at a predetermined interval is filled with the buffer material 38, whereby the blockage 33 Complete the work process of burying.
[0051]
Such a filling operation of the buffer material 38 can also be performed quickly because there is no fear of moving by the buffer material 38 because the rectangular steel container 36 is placed on the flat base 35. ,
The subsequent operations for continuously embedding the blockade 33 are continuously performed by repeating the above steps, and the blockage disposal operation in one disposal tunnel is completed.
[0052]
As described above, since the construction method of the geological disposal facility according to the present invention is configured as described in detail in the above embodiment, it becomes possible to make the main tunnel and the branch portion of the disposal tunnel perpendicular to each other, By splitting the main tunnel and disposal tunnel delivery methods, it is possible to perform installation work in multiple disposal tunnels, enabling efficient operation and operation. It is advantageous to use, and the stability of the disposal mine and the entire disposal facility are reduced, so that the rock body that is the target of the disposal facility is reduced, and the economic efficiency is improved by expanding the suitable land and reducing the construction cost. .
[0053]
As described above, the present invention has been described in detail based on the embodiment. However, the geological disposal facility and the disposal method of the waste body according to the present invention are not limited to the above embodiment, and the geological disposal facility is constructed. It is possible that various changes can be made by applying what is already known at the time of filing, as long as it does not depart from the gist of the present invention, regarding the type of strata to be formed, specific forms of disposal tunnels and main tunnels, etc. Of course.
[0054]
【The invention's effect】
The geological disposal facility according to the present invention is a geological disposal facility in which waste is transported to a disposal tunnel branched from a main tunnel and placed at a predetermined position, and the waste is transported and placed at a right angle from the main tunnel. Since the disposal mine has an auxiliary support part that supports the load of waste on the lining part, it is considered that the transportation roadbed of the disposal mine is different from the height of the transportation roadbed of the main mineway The following effects are achieved.
[0055]
(1) The cross section of the main tunnel and the disposal tunnel can be made as small as possible.
(2) It is possible to reduce the rock looseness and damage area around the bifurcation by excavating the bifurcation.
(3) The distance between the disposal tunnels and the distance from the main tunnel in the waste placement start area in the disposal tunnel can be reduced.
(4) Efficient disposal is possible because a large fixed area can be taken.
[0056]
Further, according to the waste disposal method of the present invention, in the above-mentioned geological disposal facility, the waste is disposed on the disposal tunnel transport vehicle in a direction orthogonal to the traveling direction, and the disposal tunnel transport vehicle is disposed on the main carriage transport cart in the traveling direction. Mounted in parallel direction and transported in the main tunnel, when it reaches the predetermined disposal tunnel, the disposal tunnel transporter is lowered to the disposal tunnel side, and the waste is transported to the predetermined disposal position using the disposal tunnel transporter The waste body is equipped with a load supporting support in the longitudinal direction, and the following effects are produced.
[0057]
(1) It becomes possible to make the branch of the main tunnel and the disposal tunnel perpendicular.
(2) Efficient operation and operation will be possible by branching the method of carrying in the main and disposal tunnels and allowing the waste to be placed in multiple disposal tunnels.
(3) From the spatial margin of the disposal tunnel, operability when placing using a large machine is advantageous.
(4) Reduce the scope of the rock mass that is the target of the disposal facility by reducing the stability of the disposal tunnel and the entire disposal facility.
(5) Improve economic efficiency by expanding suitable land for geological disposal facilities and reducing construction costs.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view (a) of a main shaft and a disposal shaft of a geological disposal facility according to the present invention, and an elevational view (b) taken along arrows (b)-(b).
[Fig. 2] Fig. 1 (a) is a sectional view of the disposal tunnel as viewed from (2)-(2) in Fig. 1 (a). Fig. 3 is a transport state diagram of a waste body showing a waste disposal method according to the present invention. Figure 3 (b) (4)-(4) View of transporting waste in main and disposal tunnels as viewed from (4) to (4) [Figure 5] Waste transporting state in disposal tunnel showing waste disposal method according to the present invention FIG. 6 is a diagram of an embodiment of a disposal tunnel (a) and a diagram of an embodiment of a sealed body filled with waste (b).
[Fig. 7] Specific embodiment diagram of waste disposal according to the present invention [Fig. 8] Outline diagram of general geological disposal facility [Fig. 9] Plan sectional view of main tunnel and disposal tunnel in conventional geological disposal facility [Figure 10] Elevated cross-sectional view of main and disposal tunnels in a conventional geological disposal facility [Explanation of symbols]
1 underground facilities, 2 ground receiving facilities, 3 shafts, 4 disposal shafts,
5 disposal tunnels, 6 main tunnels, 7 canister carry-in shafts,
8 personnel / material shafts, 9 emergency shafts, 10 geological disposal facilities,
11 branches, 12 main tunnels, 13 disposal tunnels,
14 bifurcations, 15, 15 'roadbed concrete, 16 inclined surfaces,
17 disposal tunnel transport vehicle, 18 transport cart, 19 waste transport locomotive,
20 rails, 21 lining, 22 overhang, 23 top surface,
24 auxiliary support equipment, 25, 26 tires, 30 bottom part, 31 side part,
32 waste bodies, 33 sealed bodies, 34 cushioning materials, 35 pedestals,
36 steel containers, 38 cushioning materials,

Claims (2)

It is a geological disposal facility that holds waste in the rectangular block and transports the waste held in the block to a disposal tunnel branched from a main tunnel and places it in a predetermined position.
The blockade includes an auxiliary support device that protrudes from both ends in the longitudinal direction and that is equipped with a tire on each protruding lower surface,
The disposal tunnel branches from the main gallery perpendicularly, and the longitudinal direction of the sealed body is conveyed in a state of mounting the sealed body in the disposal tunnel transport vehicle with auxiliary support device in a manner crossing the tunnel axis disposal tunnel Is,
Further, an overhang portion is formed in a portion corresponding to the tire of the auxiliary support device in the lining portion of the disposal tunnel, and the tire of the auxiliary support device is caused to travel on the upper surface of the overhang portion when the sealed body is transported by the disposal tunnel transport vehicle. A geological disposal facility characterized by that. The main tunnel and a disposal tunnel branched from the main tunnel in a direction perpendicular to the main tunnel, with the waste retained inside the rectangular block , the block is placed in a predetermined position in the disposal tunnel, and the longitudinal direction of the disposal tunnel is It is a disposal method of waste that is placed in a mode perpendicular to the shaft of the tunnel ,
The disposal mine transport vehicle is placed on the transport carriage moving along the extending direction of the main mine shaft in a manner that proceeds in a direction orthogonal to the extending direction of the main mine shaft, and with respect to the extending direction of the main mine shaft. And placing the sealed body on the disposal mine transport vehicle in a manner along the longitudinal direction,
A step of transporting the sealed body in the main tunnel through the transport carriage in a mode in which the longitudinal direction of the sealed body is along the traveling direction;
Removing the disposal mine transport vehicle from the transport carriage at a position corresponding to the predetermined disposal tunnel, and transporting the sealed body to the predetermined position of the disposal tunnel via the disposal tunnel transport vehicle. Disposal law.

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