JPH108742A - Concrete separation product collection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete separation product collection device capable of surely collecting separation products produced on the front layer with irradiation of microwaves by means of a concrete front layer separation device without spreading around the circumference and adhering to the concrete front layer separation device. SOLUTION: The separation product collection device collects separation products produced by separation when microwaves generated by a concrete front layer separation device 2 are irradiated toward the front layer H1 of a concrete body H to separate the front layer. The device is closed by covering the whole area of a concrete body with a scatter prevention cover 26, a suction device 20 for sucking the inside of the scatter prevention cover 26 is provided thereto, a collection device 18 for collecting the separation products is provided on the way to the suction device 20 and, at the same time, a scatter prevention cover 26a for covering the front layer side is formed of a transmission material for transmitting microwaves.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete for collecting exfoliated products such as debris and dust generated by exfoliation when the surface of concrete is exfoliated by microwave irradiation generated by a concrete exfoliation apparatus. The present invention relates to a separation product collecting device.

[0002]

2. Description of the Related Art For example, in the case of dismantling work of a nuclear facility, it is necessary to remove radioactive materials by unmanned work as much as possible in order to reduce radiation exposure as much as possible.

[0003] That is, concrete remains in the building after the equipment has been removed, but the concrete surface layer, which was the wall, floor, and ceiling near the equipment before dismantling, has been activated or contaminated. Yes, if the radioactivity of the concrete surface is high, it will be removed by unmanned work.

[0004] As an apparatus for removing the concrete surface layer by unattended operation, as described in Japanese Patent Application No. 7-240068 previously proposed by the present applicant, remote control is performed to the activated or contaminated concrete surface layer. There is a concrete surface peeling device that peels off the concrete surface by irradiation of microwaves generated by a gyrotron. By using this device, radiation exposure is completely prevented by unmanned work At the same time, it is possible to easily and completely peel off the concrete surface layer portion which is radiated and contaminated by microwaves having a strong irradiation density.

[0005]

FIG. 2 shows a concrete surface peeling device installed in a concrete body C after removing the equipment and the like, and the concrete surface layer removing work is performed by the concrete surface peeling device. This shows the state in which it is being performed. Concrete delamination apparatus indicated by reference numeral 2 in FIG. 2 is a device for irradiating microwaves toward the concrete body C ₁ that activation or contamination,
The equipment excluding the remote control means 4 is mounted on the mobile vehicle 6 so as to be able to run freely.

[0006] At the time of removing the concrete surface layer
Generates concrete debris and dust (peel products)
Therefore, as shown in FIG.
The suction port 20a of the suction pipe 20 is activated or contaminated.
Dyeing concrete body C ₁Near the microwave irradiation surface of
It is arranged in. As a result, near the microwave irradiation surface
Concrete debris and dust generated by the suction pipe 2
The dust is collected by the dust collecting device 18 through the “0”. Note that the symbol in FIG.
No. 21 is an exhaust duct.

However, according to the method for collecting concrete debris and dust shown in FIG. 2, the concrete debris and dust scattered to a position far from the microwave irradiation surface are removed by the suction port 20.
Therefore, the concrete surface delamination device 2 itself may be contaminated while not being sucked from the a and adhering to the reflecting mirror 10 and the gyrotron 4 of the concrete surface delamination device 2.

Therefore, as shown in FIG. 3, the entire concrete surface peeling device 2 is covered with a protective box 22, and a suction pipe 20 is connected to the suction box 22, and a dust collecting device 18 for generating a high negative pressure suction force. Protective box 2 using
A method of collecting concrete debris and dust in the area 2 is conceivable.

In the method of collecting concrete peeling pieces and dust shown in FIG. 3, only concrete peeling pieces and dust are generated only in the protection box 22 and the concrete peeling pieces and dust are surely sucked by the suction pipe 20 at a high negative pressure. To collect
The contaminated area does not expand. However, it is difficult to reliably prevent the concrete surface peeling device 2 from being contaminated by this trapping method.
Since covers the whole with a protective box 22 becomes large-sized device structure, activation or contaminated by after dismantling of the concrete body C ₁ is completed and the surface layer of the concrete body C ₂ that other activation or pollution When performing the removal work, the protection box 22 must be newly set, so that much work and labor are required for the work.

[0010] The present invention has been made in view of the above circumstances, and diffuses a peeling product generated on the surface of a concrete body by microwave irradiation by a concrete surface layer peeling device into the concrete surface layer peeling device or the inside of the concrete body. It is an object of the present invention to provide a concrete exfoliation product collection device capable of reliably collecting without removing the concrete.

[0011]

According to a first aspect of the present invention, there is provided a method for separating a surface of a concrete body by irradiating a microwave generated by a gyrotron of a concrete surface layer separating apparatus toward the surface of a concrete body. A concrete exfoliation product collecting device for collecting exfoliation products generated by exfoliation, wherein the concrete body is entirely covered and sealed with a shatterproof cover, and the shatterproof cover covers the inside of the shatterproof cover. A suction means for sucking is provided, and a collection means for collecting the separation product is provided in the middle of the suction means, and a part of the scattering prevention cover covering the surface layer is removed by microwave. Formed of a transmission material through which the light is transmitted.

According to a second aspect of the present invention, in the concrete exfoliation product collecting apparatus of the first aspect, the entire outer periphery of the concrete surface layer exfoliating apparatus is covered with a hermetically sealed protective cover, and the micro cover of the hermetically sealed protective cover is covered by the micro cover. The cover disposed at the position where the wave was irradiated was formed of a transparent material through which the microwave was transmitted.

Further, the invention according to claim 3 is the invention according to claim 1.
Or in the concrete separation product collecting device according to 2, wherein the permeable material is made of a plate material excellent in impact strength and heat resistance without reducing a microwave transmission amount such as an ethylene tetrafluoride resin or a polycarbonate resin. did.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The same components as those shown in FIGS. 2 and 3 are denoted by the same reference numerals, and description thereof is omitted.

FIG. 1 shows a concrete body C after removing equipment and the like in a nuclear facility. Room A inside the shielding concrete body C is a room from which equipment of a nuclear reactor has been removed. ₁ has activated or contaminated concrete portion H.

A concrete surface peeling device 2 is installed in the room A. The concrete surface peeling device 2 is connected to the gyrotron 3 for generating a high-power microwave and the microwave is connected to the gyrotron 3. A waveguide 5 made of copper or aluminum for transmission, an irradiator 8 provided at an end of the waveguide 5, and a microwave radiated from the irradiator 8 is focused to radiate contamination of the concrete portion H. A rotary reflector 10 for irradiating microwaves to the surface layer H ₁ , a cooling device 11 for cooling the gyrotron, a moving vehicle 12, and a remote controller 14. The other devices are mounted on the mobile vehicle 12.

Here, the waveguide 5 and the irradiator 8 deviate from a position having a certain angle with respect to the irradiation direction of the microwave reflected by the rotary reflecting mirror 10, that is, the irradiation path of the reflected microwave. It is installed at a position, and has a structure in which the microwave reflected by the rotary reflecting mirror 10 does not accidentally hit directly. The rotating reflector 10 has a concrete part H.
Of allowing changing the irradiation position of the microwave for the surface H ₁ (specifically by axially rotating the rotary reflecting mirror 10 in the direction of arrow R ₁ in causes brought down force in the arrow R ₂ direction.) Position changing means (Fig. (Not shown). The rotary reflecting mirror 10, and can change the irradiation area of the microwave (in particular reciprocally moved in the arrow I direction.) Area changing means (not shown) is provided for the surface H ₁ of the concrete portion H Have been.

The remote control unit 14 includes a power supply for the gyrotron 3, a position of the rotary reflecting mirror 10, a rotation angle, an elevation angle, and the moving vehicle 1.
2 is a device for remotely controlling the traveling of the vehicle. Here, the concrete portion H is covered with a scattering prevention cover 26, and the inside of the scattering prevention cover 26 communicates with a suction pipe 20 connected to the dust collecting device 18. The dust collecting device 18 includes a suction force generation unit that generates a suction force of a predetermined negative pressure, and a separation product collection unit that collects separation pieces and dust.

[0019] The scattering prevention cover 26 is a plate-like microwave transparent cover which covers the surface H ₁ radiated of or contamination of the concrete section H (transmitting material) 26a and upper edge of the microwave transmitting material 26a Scatter prevention cover 26b covering the upper part of concrete portion H while retaining
And a lower scattering prevention cover 26c that covers the lower part of the concrete portion H while locking the lower edge of the microwave transmission scattering prevention member 26a. Although not shown,
The microwave transmitting material 26a is also provided on the side of the concrete portion H.
A shatterproof cover that covers the side of the concrete section H while locking the side of the concrete section H is provided.

The upper scattering prevention cover 26b has
The suction pipe 20 connected to the dust collecting device 18 installed in the room B adjacent to the room A is connected to the lower scattering prevention cover 26.
An air supply port 26d is provided in c.

Then, the aforementioned microwave transmitting cover 2
As a specific material of 8a, a plate material made of tetrafluoroethylene resin (for example, trade name "Teflon" manufactured by DuPont, USA) or a plate material made of polycarbonate resin (for example, trade name "Macrolon" of Bayer, West Germany) ) Is used, which does not reduce the amount of microwave transmission and has excellent properties such as impact strength and heat resistance.

On the other hand, the entire outer periphery of the concrete surface peeling device 2 excluding the remote control unit 14 is covered with a box-shaped hermetic protective cover 30 and a cover for covering the direction of microwave irradiation by the rotary reflector 10. Is provided with a microwave transmitting cover (transmitting material) 32 having the same properties as the microwave transmitting cover 28 described above.
Thus, the entire outer periphery of the concrete surface layer peeling device 2 is covered by the hermetic protective cover 30 and the microwave transmitting cover 32.

Next, cover the concrete portion H by scattering prevention cover 26 is peeled off the surface H ₁ by a concrete delamination apparatus 2 while covering the concrete delamination apparatus 2 by sealing the protective cover 30 and the microwave transmitting cover 32 The method will be described first.
8 is started, and the mobile vehicle 12 is moved to the surface layer H of the concrete body H by remote operation of the remote control device 14.
Move to near ₁ , gyrotron 3, rotating mirror 1
0 like is opposed to the surface H _1. And the remote control device 1
After changing the position and the area of the rotary reflecting mirror 10 by 4, the gyrotron 6 generates a microwave, transmits the microwave to the irradiator 8 through the waveguide 5, and transmits the microwave irradiated from the irradiator 8. and focusing the waves rotary reflecting mirror 10 is radiated toward the surface H ₁ of the concrete part H.

At this time, the irradiated microwave is applied to the microwave transmitting cover 32 of the hermetic protective cover 30 and the microwave transmitting cover 26 a constituting the scattering prevention cover 26.
Both transmitted through and continue to heat the surface H ₁ that activation or contamination of the concrete bodies H. Then, the surface H ₁ that is heated, rapid increase in the internal pressure water in the concrete is rapidly vaporized and expanded, gradually peeled off due the occurrence of strain stress due to thermal expansion.

The exfoliated particles and dust generated by the exfoliation of the surface layer H ₁ of the concrete body H are prevented from scattering by the scattering prevention cover 26.
It is sucked from the suction pipe 20 communicating with the inside, and collected by the dust collecting device 18.

Therefore, according to the above-described embodiment,
Concrete bodies H, together are isolated covered by the scattering prevention cover 26 is disposed a microwave transmitting cover 26a to the surface H ₁ side from the A chamber, scattering prevention cover 26
The internal is in communication with the suction pipe 20 connected to the dust collecting device 18, when the microwave generated by the concrete delamination device 2 by transmitting microwave transmitting cover 26a continue to irradiate the surface H _1, the surface layer Peeling pieces and dust inside the scattering prevention cover 26 caused by the peeling of H ₁ (peeling products)
Are sequentially sucked from the suction pipe 20. This makes it possible to reliably collect the generated debris and dust without scattering them into the room A, thereby preventing the contamination area from expanding.

[0027] In the present embodiment, since the sealed covers only concrete bodies H around the surface H ₁ that activation or contaminated with scattering prevention cover 26, a large apparatus shown in FIG. 3 Structure The time and labor required for the stripping operation can be greatly reduced as compared with the conventional apparatus.

Further, since the concrete surface peeling device 2 is entirely covered with the hermetically sealed protective cover 30 and the microwave transmitting cover 32, even if the peeled pieces or dust are scattered in the room A, the concrete surface peeling device 2 is removed. It is possible to prevent the separation pieces and dust from adhering to the components of the device 2 and to reliably prevent malfunction of the device 2 and radiation contamination of the device 2 itself.

Furthermore, the microwave transmitting cover 26a that covers the surface H ₁ of the concrete body H, the rotary reflector 1
Since the microwave transmission cover 32 covering the irradiation direction of the microwave of 0 is made of a plate material such as tetrafluoroethylene resin or polycarbonate resin, the microwave transmission cover 32 is irradiated from the rotary reflecting mirror 10 of the concrete surface layer peeling device 2. without reducing the amount of transmitted microwaves can be efficiently carried out the peeling of the surface layer H _1.

[0030] Furthermore, since the plate material such as tetrafluoroethylene resin or polycarbonate resin has excellent properties in impact strength and heat resistance, the microwave transmitting cover 26a also the surface H ₁ has not been heated heat The microwave transmitting covers 26a and 32 do not deteriorate even if the peeled pieces collide with each other, and thus can sufficiently function as a scattering prevention cover and a sealing protection cover.

The suction pipe 20 of the present embodiment corresponds to the suction means of the first aspect, and the dust collecting device 18 corresponds to the first aspect.
It corresponds to the collecting means described.

[0032]

As described above, according to the first aspect of the present invention,
The concrete exfoliation product collecting device described above covers the entire surface of the concrete body from which the surface layer is exfoliated with a scattering prevention cover, and is provided with suction means for sucking the inside of the scattering prevention cover. Since a collecting means for collecting the separation products is provided and a part of the scattering prevention cover covering the surface layer is formed of a transparent material through which microwaves can pass, the microwave generated by the concrete surface layer separation device is used. Enables the surface layer to be irradiated and heated through the transmission material. And the separation product inside the scattering prevention cover generated by the separation of the surface layer is collected by the collection means via the suction means, so that the diffusion of the separation product into the concrete body can be prevented. . And adhesion of the peeling product to the concrete surface layer peeling device can also be prevented. In particular, when exfoliating the surface layer of the activated or contaminated concrete body, the activated or contaminated exfoliated product can be reliably collected.

Here, even if a very small amount of exfoliated product is scattered inside the concrete body, in the concrete exfoliated product collecting device according to the second aspect, the entire outer periphery of the concrete surface exfoliation device is covered with a sealed protective cover. Because of the covering, the adhesion of the peeling product to the concrete surface layer peeling device is reliably prevented, and the malfunction or the like of the concrete surface layer peeling device can be eliminated. As described above, when the surface layer of the radiation-contaminated concrete body is peeled, the contamination of the concrete surface layer peeling device can be reliably prevented.

Further, since the cover of the hermetic protective cover, which is provided at the position where the microwaves are irradiated, is made of a transparent material through which the microwaves can pass, the microwaves generated by the concrete surface peeling device can be reliably applied to the surface layer. Can be irradiated.

Further, according to the concrete exfoliation product collecting apparatus according to the third aspect, the transmitting material does not reduce the transmission amount of microwaves such as ethylene tetrafluoride resin or polycarbonate resin, and has an impact strength and heat resistance. As a result, the microwave transmitted through the transmitting material is irradiated to the surface layer at a high irradiation density, and the surface layer can be reliably separated. The permeable material as the shatterproof cover covering the concrete body surface layer is not thermally affected by the heated surface layer, and does not deteriorate even if the peeling product collides. Function.

[Brief description of the drawings]

FIG. 1 is a diagram showing a concrete surface layer peeling operation provided with a concrete peeling product collecting device of the present invention.

FIG. 2 is a view showing a conventional concrete surface layer peeling operation.

FIG. 3 is a diagram showing another conventional concrete surface separation operation.

[Explanation of symbols]

2 Concrete surface layer peeling device 3 Gyrotron 18 Dust collector (collecting means) 20 Suction pipe (suction means) 26 Shatterproof cover 26a, 32 Microwave transmitting cover (transmitting material) 30 Sealing protective cover H Concrete body H ₁ Surface layer

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Tadanori Tsukamoto 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation

Claims (3)

[Claims] 1. A concrete exfoliating device that irradiates a microwave generated by a gyrotron of a concrete surface exfoliating apparatus toward a surface layer of a concrete body to exfoliate the surface layer, and collects exfoliation products generated by the exfoliation. A product collection device, wherein the concrete body is entirely covered and sealed with a shatterproof cover, and the shatterproof cover is provided with suction means for sucking the inside of the shatterproof cover. Concrete, wherein a collecting means for collecting the exfoliated product is disposed, and a part of the scattering prevention cover covering the surface layer side is formed of a transmitting material through which microwaves pass. Exfoliation product collection device. 2. The entire outer periphery of the concrete surface peeling device is covered with a hermetic protective cover, and a cover disposed on the hermetic protective cover at a position irradiated with the microwave is made of a transparent material through which microwaves pass. The concrete separation product collection device according to claim 1, characterized in that: 3. The transmission material according to claim 1, wherein the transmission material is made of a plate material such as an ethylene tetrafluoride resin or a polycarbonate resin having excellent impact strength and heat resistance without reducing a microwave transmission amount. 3. The device for collecting concrete exfoliated products according to 1 or 2.