JP2006207275A - Partition room for dismantlement, and dismantling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent environmental pollution by preventing dust from stirring up when cutting a facility for dismantling a nuclear power facility or the like. <P>SOLUTION: A partition room 10 for dismantling a feed water heater 2 has a partition room body 11 surrounding the feed water heater 2; a liquid spraying device 13 for a cut part of the feed water heater 2; and a container 15 for collecting sprayed water. The feed water heater 2 is cut using a hand grinder 12, for instance. The water collected by the collecting container 15 is supplied to the liquid spraying device 13 after removing foreign matters, and recycled. An upper part of a surrounding wall of the partition room body 11 is provided with an air intake port 11A, and a lower part is provided with an exhaust port 11B. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a dismantling partition chamber and a disassembling method suitable for dismantling equipment such as a nuclear power plant.

  Specifically, the present invention suppresses the rising of dust generated by the cutting of the equipment by providing the dismantling partition chamber with the liquid spraying means for spraying the liquid onto the cutting site and the liquid capturing means for collecting the sprayed liquid. In addition, liquid containing dust is collected to prevent contamination of the work environment.

  In recent years, an apparatus for suppressing generation of dust generated during dismantling work has been developed. For example, the watering device 20 for dismantling work shown in FIG. 8 is provided with a water storage tank 22, an injection pump 23, and a lifting stand 24 on a self-propelled carriage having a crawler 21, and a nozzle receiving portion 25 on the lifting stand 24. A nozzle 26 is attached to the nozzle 26, and the nozzle 26 can be horizontally rotated and tilted up and down from outside via a reduction motor (not shown) provided in the nozzle receiving portion 25 so that it can be operated from the outside. Thus, water spraying can be performed to prevent the generation of dust at the site of building demolition work (see Patent Document 1).

Japanese Utility Model Publication No. 6-31859

  By the way, according to the sprinkler for dismantling construction according to the conventional example, there are the following problems.

  (1) Sprinkling water on the building to be demolished in advance causes the building to absorb moisture and suppress the generation of dust, but does not absorb moisture even if water is sprayed in advance on equipment composed of metal or the like. For this reason, it is impossible to suppress the dust from stopping.

  (2) Since there is no means for collecting scattered water, the water is scattered in the work place after the watering.

  (3) Although the generation of dust can be suppressed, it is impossible to prevent the dust generated during dismantling from being scattered, and therefore, it cannot be used for dismantling facilities composed of harmful substances.

  The present invention has been proposed in order to solve the above-described problems of the prior art, and suppresses dust generated during dismantling of equipment composed of metal or the like, and suppresses the rising of dust. An object of the present invention is to provide a dismantling partition chamber and a disassembling method capable of collecting the liquid used for the purpose and preventing environmental pollution.

  A decomposing partition chamber according to the present invention is a decomposing partition chamber for disassembling equipment, a partition chamber body surrounding the equipment, and a cutting means for cutting the equipment surrounded by the partition chamber body. There are provided a fountain means for spraying a liquid onto a cutting site of equipment to be cut by the cutting means, and a liquid collecting means for collecting the liquid sprayed on the cutting site by the fountain means.

  According to this invention, the facility is enclosed by the partition chamber main body, and the facility is cut by the cutting means in the partition chamber main body, and the liquid is sprayed onto the cut portion by the fountain means, and the ejected liquid is captured. Collect by collecting means.

  As a result, even when dismantling equipment composed of metal, etc., it is possible to suppress the rising of dust generated at the time of cutting, and the ejected liquid can be collected. It is possible to prevent the generated dust from scattering to the outside.

  A disassembly compartment according to the present invention is a disassembly compartment for disassembling equipment, and includes an intake port at an upper portion of an enclosure surrounding the facility and an exhaust port at a lower portion.

  According to the present invention, the facility is surrounded by the surrounding wall, the intake port is provided at the upper part of the surrounding wall, and the exhaust port is provided at the lower part.

  As a result, the air flow in the dismantling partition chamber flows from the top to the bottom, and it is possible to prevent the dust from rising when the equipment is dismantled.

  The facility dismantling method according to the present invention includes a step of surrounding the facility, a step of cutting the facility and spraying a liquid onto the cutting site, and a step of collecting the liquid.

  According to this invention, generation | occurrence | production of dust can be suppressed when it cut | disconnects an installation, and it can prevent that generated dust disperses outside. In addition, since the ejected liquid is collected, contamination of the work environment can be prevented.

  Further, the disassembly compartment according to the present invention is a disassembly compartment for disassembling equipment, and is cut by a partition body surrounding the equipment and having an exhaust port provided with a filter, and a cutting means. And a fountain means for spraying a liquid onto a cutting site of the equipment.

  According to this invention, since the spark generated when the facility is cut can be extinguished by the liquid, it is possible to prevent an accident such as the spark being sucked into the filter provided in the exhaust port and igniting.

  According to the disassembling partition chamber according to the present invention, the spraying means for spraying the liquid onto the cutting site and the liquid collecting means for collecting the ejected liquid are provided. With this configuration, it is possible to suppress the rising of the dust generated when the equipment is cut off by jetting the liquid, and it is possible to collect the liquid containing the dust. Therefore, contamination of the work environment can be prevented.

  According to the dismantling partition chamber according to the present invention, the intake port is provided in the upper part of the surrounding wall surrounding the facility, and the exhaust port is provided in the lower part. With this configuration, an air flow from the upper side to the lower side is generated in the dismantling partition chamber, so that the rising of dust generated when the facility is cut can be suppressed.

  According to the decomposing partition chamber according to the present invention, the partition chamber body surrounding the facility has an exhaust port provided with a filter, and includes a squirting means for spraying liquid onto the cutting site of the facility to be cut by the cutting unit. It is. With this configuration, sparks generated when the equipment is cut off can be digested with liquid, and accidents such as sparks being sucked into a filter provided at the exhaust port can be prevented.

  According to the disassembling method for disassembling the equipment according to the present invention, the method includes a step of surrounding the equipment, a step of cutting the equipment and spraying a liquid onto the cutting site, and a step of collecting the liquid. . With this configuration, environmental pollution can be prevented when dismantling the equipment.

  The dismantling partition chamber and the disassembling method according to the embodiment of the present invention are described above with reference to the drawings.

FIG. 1 is a perspective view showing a configuration example of a decomposing partition chamber 10 according to the present invention.
The disassembly compartment 10 according to the present invention includes a fountain device 13 that sprays water in a mist form (hereinafter referred to as spray), a fountain part support 14 that movably supports the fountain device 13, A collecting container 15 that collects water sprayed from the liquid device 13, and foreign matter is removed from the water collected in the collecting container 15, and the water from which the foreign matter has been removed is sent to the fountain device 13. And a circulation device 16.

  The facility 1 is a feed water heater or the like used in a nuclear power plant. Here, the feed water heater is a water heater that is used to improve the thermal efficiency when water obtained after electricity is cooled by the condenser is returned to the reactor again to produce high-temperature and high-pressure steam. It is a device that warms water with a U-shaped tube heat exchanger on the way back from the water vessel to the reactor. The optimal size, structure, and material of this device are selected according to the conditions of use of each nuclear power plant. In this embodiment, the total length is about 12 m and the diameter is about 1.6 m. It is.

  FIG. 2 shows a perspective view of a configuration example of the feed water heater 2. As shown in the figure, the feed water heater 2 includes a body 3, a feed water inlet 4, a feed water outlet 5, a steam inlet 6, a narrow tube 7, a drain cooling zone 8, a drain outlet 9, and the like. In order to treat these as low-level radioactive waste, it is necessary to cut them finely so that they can be put into drums.

  Usually, if a large-sized band saw is used as a cutting tool, generation of metal powder can be suppressed as compared with the case of cutting with a grinder or the like, and efficient cutting becomes possible. However, in the feed water heater 2, only the side where the narrow tube 7 is provided with the feed water inlet 4 and the feed water outlet 5 in the body 3 is fixed, the other end is not fixed, and the saw blade of the large band saw is about 2 mm thick. Before the thin tube 7 is cut, the thin tube 7 is bent from the fixed portion. If the operation continues in such a state, the saw blade may be damaged, and it is not preferable to cut the feed water heater 2 with a large band saw.

  Therefore, as shown in FIG. 1, the thin tube 7 is cut into a predetermined length of waste material 7A shown in FIG. 3 by a handy type cutting device 12 such as a hand grinder, and this waste material 7A is shown in FIG. 4 (A). Bundled with a band, as shown in FIG. 4 (B), the waste material 7A is densely packed without gaps into a block-like waste material block 7B, which can be treated as low-level radioactive waste with a band saw (not shown) or the like. Disconnect.

  Dust is generated when cutting with a handy-type cutting device 12 such as a hand grinder. However, there is a possibility that it has radioactivity, and if this dust is discharged to the outside, it becomes an environmental problem. Therefore, the dust is prevented from being released to the outside by working in the disassembly compartment 10.

  The compartment main body 11 surrounding the equipment 1 is configured by a prefabricated member that can be assembled and disassembled so that it can be used even when the equipment 1 is difficult to move, and can be deformed according to the size of the equipment 1. The In addition, it is necessary to have a sealing property so that dust generated when cutting is not scattered outside.

  As shown in FIG. 5, in the compartment body 11, a worker who wears a dust mask performs a cutting operation. In order to ventilate the compartment body 11, an air inlet 11 </ b> A and an exhaust outlet 11 </ b> B having a fan are used. Is provided.

  The air inlet 11A is above the surrounding wall 11C constituting the partition chamber body 11 behind the worker, and the exhaust port 11B is below the surrounding wall 11D of the front partition chamber body 11 on which the worker works. When the fan of the exhaust port 11B is operated, the airflow in the partition chamber main body 11 flows from above the worker to below the cutting site due to the position where the intake port 11A and the exhaust port 11B are attached. It is possible to suppress dust from rising toward the worker. This method is suitable for a cutting method in which water cannot be used, such as plasma fusing, and can prevent an improvement in worker's health and hygiene and deterioration in work efficiency.

  The cutting device 12 for cutting the facility 1 is installed so as to be freely movable in the dismantling partition chamber 10 so that all parts of the facility 1 installed in the partition chamber body 11 can be cut. Specifically, the cutting device 12 is a hand grinder, a gas fusing machine, or the like, and the partition chamber main body 11 is laid so as to be assembled and disassembled by simple equipment such as a prefab. A device that can be easily stored, such as a cord reel or a hose reel, is used so that it can be moved and disassembled.

  By using a hand grinder or the like for the cutting device 12, the cutting site can be narrowed, and the thin tube 7 of the feed water heater 2 can be easily cut. Therefore, the cutting device 12 is suitable for cutting the thin tube 7 of the feed water heater 2.

  In the vicinity of the part of the cutting device 12 that cuts the equipment 1, a fountain device 13 that sprays water on the part is movably installed in accordance with the movement of the cutting part, and sprays water at the time of cutting. Generation of dust can be suppressed. For this reason, the cutting device 12 is required to have waterproof performance.

  As shown in FIG. 6, the fountain device 13 includes a liquid ejecting unit 13A at the tip, and a remote operation unit 13B at a position remote from the liquid ejecting unit 13A via a pipe or the like. The remote operation unit 13B is connected to a liquid supply means (circulation device 16 described later in this embodiment) via a hose 13C, and water is supplied from the liquid supply means to the fountain device 13, and the remote operation shown in FIG. By pulling the trigger-shaped grip of the operation unit 13B, water can be sprayed from the liquid ejecting unit 13A. It should be noted that although water is ejected from the liquid ejecting unit 13A by pulling the trigger-shaped grip of the remote control unit 13B, a push button or the like may be used, or a remote control or the like may be used so that one person can work.

  Above the worker, as shown in FIGS. 1 and 5, a rail 14 </ b> A of the ejection unit support 14 is installed by a support column 14 </ b> B. A sliding device 14C is movably mounted on the rail 14A, and a suspension member 14D that holds the fountain device 13 is fixed to the lower portion of the sliding device 14C. Here, since the rail 14 </ b> A is installed along the facility 1, the fountain apparatus 13 can be moved along the facility 1. Note that the rail 14A is made of H steel or the like, grease such as molybdenum is applied to a portion that contacts the sliding device 14C, and a bearing or a sliding plate or the like is applied to a portion that contacts the rail 14A of the sliding device 14C. Therefore, the fountain device 13 can be moved smoothly.

  In the above description, water is supplied to the fountain apparatus 13 via the hose 13C. However, a means for supplying water to the injection unit support 14 is provided so that supply can be performed from the suspension member 14D. May be.

  The collection container 15 is installed at the lower part of the equipment 1 as shown in FIG. 1 and collects the water sprayed from the fountain apparatus 13 as shown in FIG. 5, and the container body as shown in FIG. 15A, a waterproof sheet 15B, and a protective member 15C.

  The container body 15A is made of wood, metal, or the like so that it can be easily formed so as to be wider than the projected bottom shape of the equipment 1 so that sprayed water does not spill. The waterproof sheet 15B is a member that covers the container main body 15A so that liquid does not leak from the container main body 15A. The protective member 15C is formed of a tin plate or the like, and is a member that protects the container body 15A and the waterproof sheet 15B from being damaged by the weight of the equipment 1 or sparks generated during cutting, and the like. Placed on.

  In addition, since the collection container 15 should just collect the water sprayed on the cutting | disconnection site | part, you may make it a small container which can be moved and installed only in the part to which water falls. Moreover, you may integrally mold with a sheet metal, resin, etc. In this case, the waterproof sheet 15B and the protection member 15C become unnecessary.

  The circulation device 16 is provided in the vicinity of the collection container 15 and communicates with the collection container 15 so that the water collected in the collection container 15 can be sent out. This is a filtration device that sends water to the fountain device 13 that is communicated via the hose 13C after being removed in step S1. Here, in the case of a small container in which the collection container 15 is movable, the collection container 15 may be communicated with the circulation device 16 via a hose or the like so that the collection container 15 can be moved. You may pour.

  Next, a disassembly method using the disassembly compartment 10 of the present embodiment configured as described above will be described.

  First, the compartment main body 11 is installed so as to surround the facility 1. In addition, you may carry in the installation 1 in the partition main body 11 installed. The collection container 15 is installed in the lower part of the facility 1, and the ejection unit support 14 is installed along the facility 1. The fountain device 13 is attached to the ejection unit support 14, and is connected via the fountain device 13, the circulation device 16, and the hose 13C.

  The liquid ejecting unit 13A of the cutting device 12 and the fountain device 13 is moved to the part of the facility 1 to be cut. As shown in FIG. 5, the remote control unit 13 </ b> B is operated to spray the water from the liquid ejecting unit 13 </ b> A toward the site where the facility 1 is cut, and the cutting device 12 cuts the facility 1. The jetted water is collected by the collection container 15. Here, since the collection container 15 is produced wider than the projected bottom shape of the facility 1, water can be collected without leakage. Foreign matter is removed from the water collected in the collection container 15 by the circulation device 16 and sent to the fountain device 13.

  According to the disassembling partition chamber and the disassembling method according to this embodiment, it is possible to suppress the rising of dust generated during cutting by the water sprayed from the liquid ejecting unit 13A. Moreover, since the spark generated at the time of cutting can be extinguished with water, it is possible to prevent accidents such as sparks being sucked into a filter or the like provided in the exhaust port 11B.

  Moreover, since the water can be collected by the collection container 15 without leakage, the work environment is not contaminated. Moreover, since water containing foreign substances is recycled without being discarded, contamination of the external environment can be prevented. In addition, although the filter is provided in the exhaust port 11B so that dust is not directly discharged | emitted outside, since dust is suppressed, the replacement period of a filter can be extended.

  In addition, although the fountain apparatus 13 sprayed water, you may spray a cutting oil etc. and you may make it spray in a shower form not only by spraying but by the form of a cutting site | part.

  As described above, the disassembly compartment and the disassembly method of the present invention have been described in detail. However, the present invention is not limited to the above-described embodiments, and various improvements and modifications may be made without departing from the spirit of the present invention. Of course.

  Since this invention can suppress the rising of dust by spraying water at the time of cutting, it is very suitable to be applied to a dismantling partition for nuclear power generation facilities.

It is a perspective view which shows the structural example of the partition chamber 10 for dismantling of this invention. It is a perspective view which shows the structural example of the feed water heater. It is the schematic which shows the structural example of 7 A of waste materials. The structural example of the waste material block 7B is shown, (A) is a front view, (B) is a side view. It is sectional drawing which shows the structural example of the partition chamber 10 for dismantling of this invention. It is a front view which shows the structural example of the fountain apparatus 13 of this invention. It is sectional drawing which shows the structural example of the collection container 15 of this invention. It is a side view which shows the structural example of the conventional dismantling construction watering apparatus 20. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Equipment, 2 ... Feed water heater, 7 ... Narrow tube, 10 ... Disassembly compartment, 11 ... Divider body, 11A ... Intake port, 11B ... Exhaust port , 12 ... Cutting device (tool such as a hand grinder or gas fusing machine), 13 ... Jet device, 13A ... Liquid jetting unit, 13B ... Remote control unit, 14 ... Supporting jetting unit Body, 14A ... rail, 14B ... support column, 14C ... sliding device, 14D ... suspension member, 15 ... collection container, 15A ... container body, 15B ... Waterproof sheet, 15C ... protective member, 16 ... circulating device

Claims (8)

A demolition compartment for dismantling equipment,
A compartment body surrounding the facility;
Fountain means for spraying liquid onto the cutting site of the equipment to be cut by the cutting means;
A decomposing partition chamber comprising: liquid collecting means for collecting liquid sprayed to a cutting site by the fountain means. 2. The dismantling partition chamber according to claim 1, further comprising a circulation unit that removes foreign matter from the liquid collected by the liquid collecting unit and sends the liquid from which the foreign matter has been removed to the jetting unit. The fountain means is
A liquid ejecting section for ejecting liquid;
A remote operation unit capable of remotely operating the liquid ejection of the liquid ejection unit,
The liquid ejecting unit is attached to an ejecting unit support that movably supports the liquid ejecting unit,
After moving the liquid ejecting unit using the ejecting unit support in the vicinity of a site where equipment is cut by the cutting means,
The dismantling partition chamber according to claim 1, wherein the facility is cut while ejecting liquid from the liquid ejecting section by the remote operation section. The liquid collecting means is a container wider than the projected bottom shape of the equipment,
A liquid collection body made of metal or wood;
A waterproof sheet for preventing liquid from leaking from the liquid collecting body;
A protective member for protecting the liquid collecting body and the waterproof sheet;
The decomposing partition chamber according to claim 1, wherein the waterproof sheet and the protective member are laminated on the liquid collecting body. A demolition compartment for dismantling equipment,
A decomposing partition chamber comprising an intake port at an upper part of a surrounding wall surrounding the facility and an exhaust port at a lower part. A demolition compartment for dismantling equipment,
A compartment body surrounding the equipment and having an exhaust port provided with a filter;
A decomposing partition chamber, comprising: fountain means for spraying liquid onto a cutting site of the equipment to be cut by the cutting means. The compartment main body further has an air inlet,
The decomposing partition chamber according to claim 6, wherein the intake port is provided in an upper portion of the partition chamber body, and the exhaust port is provided in a lower portion. A dismantling method for dismantling equipment,
Surrounding the equipment;
Spraying a liquid on the cutting site when cutting the equipment;
And a step of collecting the liquid.

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