JP2008216201A - Device and method for repairing minute defective of water tank lining material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method for repairing a minute defect capable of easily repairing a lining material lined on the inner peripheral surface of an open tank functioning as a water tank, more specifically a lining material of a fuel storage water tank in nuclear power plants by using an underwater curing adhesive agent composition which is prevented from being spattered. <P>SOLUTION: In this minute defect repairing device for repairing, underwater, the minute defect of the lining material lined on the inner peripheral surface of the tank by using the underwater curing adhesive agent composition, a metal partitioned body surrounding the periphery of the minute defect is so formed with a space formed to secure the distance corresponding to "the length of adhesion from the minute defect" necessary for repairing the minute defect with the underwater curing adhesive agent composition that the open surface of the body can be brought into contact with the wall surface of the lining material. An opening into which a filling nozzle for feeding the underwater curing adhesive agent composition is formed in the body at the gravity side upper position. The body is fitted to the periphery of the minute defect through the underwater curing adhesive agent composition fed from the opening. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lining material lined on the inner peripheral side of an open container that functions as a water tank, more specifically, a microdefect in a lining material of a fuel storage water tank in a nuclear power plant, using an underwater curable adhesive composition. The present invention relates to a micro defect repair device, a micro defect repair method, and a repair body that are repaired under water.

The fuel storage tank in the nuclear power plant is a large tank with a depth of about 12m and a width and length of 10-20m each, with the upper part located at a depth of about 8m. A fuel storage rack is arranged, and water is stored almost completely for safe storage of fuel.
Such a water tank is formed by bonding a lining material made of stainless steel or the like on the foundation surface of the concrete (lining). However, during use for many years, the lining agent that delimits the inner wall surface of the water tank is damaged. Since this may lead to further deterioration, damage, etc., repair is necessary.

However, in the case of draining and storing large tanks for repair work, in addition to the problem that it costs a lot of money, it is not safe to immerse the fuel in water like a fuel storage tank. Water tanks that are essential requirements must have preliminary facilities for temporary transfer to other water tanks.
Moreover, it is dangerous for an operator to dive for a long time in the water tank described above, and there is a problem that work in water has a longer time than work on land.

In view of such a situation, an invention for repairing the inner surface of a water tank as in Patent Document 1 has been proposed. According to patent document 1, the repair method in case an operator enters the inside of a water tank and repairs is proposed. This is for a sewage layer in a sewage treatment plant and is a method of performing local drainage in a water tank.
Specifically, the shelter is submerged in the bottom of the aquarium to be repaired in the aquarium, a water stop material is provided at the lower opening edge of the duct, and the water accumulated during the shelter subsidence is drained from the shelter, This is a method of securing an airborne area in a part of the inside.

Patent Document 2 proposes an underwater adhesive composition used for repairing the lining material in a water tank having a structure in which a lining material made of stainless steel or the like is provided on a concrete base surface.
This underwater adhesive composition is characterized by comprising a two-component underwater adhesive and a radiation-resistant additive. As the radiation-resistant additive, it is preferable to blend an aromatic amine-based additive for improving radiation resistance. Specifically, it is preferably at least one compound selected from the group consisting of modified aromatic polyamines such as diethyltoluenediamine, metaxylenediamine, and mensendiamine. In addition, a boron-based additive for improving the neutron-resistant property is also used. As the boron-based additive, at least one compound selected from the group consisting of boron carbide, boron oxide, boron nitride, boron anhydride, iron borate, orthoboric acid and metaboric acid is suitable. Furthermore, it is described that both the amine-based additive and the boron-based additive are blended.
Examples of the main component of the two-component underwater adhesive include bisphenol type epoxy resins such as bisphenol A type epoxy resins and novolac type epoxy resins. On the other hand, the curing agent is at least selected from the group consisting of amines or polyamines such as polyamide amine, modified polyamide amine, modified polyamide polyamine, modified aliphatic polyamine, modified aromatic polyamine, heterocyclic polyamine, and modified alicyclic polyamine. One curing agent is preferred. It is described that the underwater adhesive composition described in Patent Document 2 can be applied not only as a coating layer but also as an adhesive for a coating plate against a defective portion.

JP 2002-061279 A JP 2003-155466 A

However, in the invention described in Patent Document 1, in the water tank that stores sewage, chemicals, and the like, the installed shelter is contaminated, so it cannot be repaired immediately after the shelter is installed. In addition, there is a problem that the water tank must be drained locally, but an operator has to enter the tank to work. Furthermore, Patent Document 1 does not disclose the repair of minute defects, and the repair location is limited to the bottom of the water tank.
On the other hand, Patent Document 2 only discloses an underwater adhesive composition, and a specific repair method for repairing a water tank liner having a structure in which a stainless steel liner is provided on a concrete base surface is as follows. Not proposed.

In the method of repairing minute defects in the lining material lined on the inner peripheral side of the open container that functions as a water tank using an underwater curing type adhesive, there is no need for work that involves the danger of workers entering the water tank. It is required to repair underwater.
Furthermore, in more detail, in the micro defect repair method in which micro defects on the lining material of the fuel storage tank in a nuclear power plant are repaired underwater using an underwater curable adhesive, the micro defect is only in the plane portion of the tank lining material. In addition, it must be considered that a three-dimensional structure is present in the vicinity of the minute defect.
Furthermore, when the coated underwater adhesive composition floats in the water tank before uncured and is exposed to a high temperature environment such as a fuel storage tank, it is included in the epoxy resin that is the main component of the underwater adhesive composition. Chlorine (Cl) is unlikely to elute due to chemical changes, but it cannot be denied that it is not eluted at all, and the possibility of corrosion of the lining material is also possible, so repairing micro defects in the tank lining material underwater There is a need for better equipment development.
Therefore, in view of the above-mentioned problems of the prior art, the present invention is a lining material lined on the inner peripheral side of an open container that functions as a water tank, more specifically, a minute defect in the lining material of a fuel storage tank in a nuclear power plant, It is an object of the present invention to provide a micro defect repair device and repair method that can be easily repaired underwater using an underwater curable adhesive composition and that prevents the underwater curable adhesive composition from being scattered. .

The present invention achieves such an object, in a micro defect repairing apparatus for repairing micro defects of a lining material lined on the inner peripheral side of a water tank under water using an underwater curable adhesive composition,
A metal partition that surrounds the periphery of the microdefect with a space that secures a distance corresponding to the “adhesion length from the microdefect” that is necessary when repairing the microdefect with the underwater curable adhesive composition. The body is formed so that the open surface of the partitioning body can be in contact with the wall surface of the lining material, and a filling nozzle for feeding the underwater curable adhesive composition can be inserted into the position above the partitioning body in the gravity direction And the partition body is configured to tightly fill the periphery of the minute defect through the underwater curable adhesive composition fed from the opening.

ADVANTAGE OF THE INVENTION According to this invention, it is possible to repair easily the micro defect of the water tank liner material underwater using an underwater hardening type adhesive composition. That is, by forming a partition section surrounding the periphery of the minute defect, the underwater curable adhesive composition is cured in close contact with the minute defect, thereby preventing leakage.
Furthermore, since the compartment prevents scattering of the filled underwater curable adhesive composition, even when chlorine (Cl) elutes from epoxy resin or the like when exposed to high temperature, it does not float in the water and corrodes the lining material. And can be suitably applied even in a high temperature environment such as a fuel storage tank.

In addition, when there are minute defects in the tank lining material on the side surface of the tank lining material,
The partition body is a wide-area closed surface having a length in which the surface opposite to the open surface in contact with the side surface surrounds the periphery of the micro-defect, and has a length depending on the adhesion length from the micro-defect, A belt-shaped side wall is formed so as to surround a portion that contacts the lining material side surface, and an upper side is an opening into which a filling nozzle can be inserted.
Furthermore, when the micro defect of the water tank liner is on the bottom surface of the water tank liner,
The partition body surrounds a wide surrounding space having a length obtained by extending a bonding length from a micro defect located on the bottom surface, and a belt-shaped side wall surrounds a portion in contact with the bottom surface of the lining material. An opening or an open space into which a filling nozzle can be inserted is formed in the space above the bottom surface.
In this way, the shape of the repair surface where micro defects are present is different, so it is possible to easily repair even if there is a three-dimensional structure in the aquarium by selecting a partition body that matches the shape. is there.

The filling nozzle for feeding the underwater curable adhesive composition through the opening into the recessed space formed by contacting the partition with the wall surface of the lining material is inserted into the recessed space at the tip of the nozzle. The extension nozzles are connected to each other, and the extension nozzles after the resin is filled and solidified in the compartments through the extension nozzles are cut and left in the filled and solidified body.
Thereby, it becomes possible to pull up the filling nozzle from the water without spraying the water-curable adhesive composition into the water.

The filling nozzle for feeding the underwater curable adhesive composition through the opening into the recessed space formed by contacting the partition with the wall surface of the lining material is inserted into the recessed space at the tip of the nozzle. An extension nozzle is connected to the front end of the extension nozzle, and the tip of the extension nozzle is secured to a distance corresponding to the adhesion length from a minute defect located in the recess space and extends from the lower area to an arbitrary position between the partition bottom positions. It is characterized by that.
Furthermore, when the minute defect of the water tank liner is on the side surface of the water tank liner, the tip of the filling nozzle is provided in the lower region while securing the adhesion length from the minute defect.
As described above, the underwater curable adhesive composition can be tightly filled around the microdefect and can be filled and cured to repair the microdefect.

In addition, when the minute defect of the water tank liner is on the bottom surface of the water tank liner, the tip of the filling nozzle or the extension nozzle is provided in contact with the minute defect.
Thereby, generation | occurrence | production of the water bubble at the time of filling with an underwater hardening type adhesive composition can be prevented, and it fills without the adhesive composition entraining a water bubble. That is, the repair of minute defects becomes stronger.

In addition, according to the invention, when the tip of the filling nozzle or the extension nozzle has an opening, the tip of the filling nozzle is provided apart from the bottom of the concave space.
Further, when the tip of the filling nozzle or extension nozzle and the bottom of the concave space are provided in contact with each other, an adhesive composition outlet opening is formed on the side surface of the tip of the filling nozzle or extension nozzle. To do.
Thus, by selecting the position and shape of the tip of the filling nozzle or extension nozzle from the shape of the repair surface where micro defects exist, the filling time can be reduced and the adhesive composition can be filled uniformly. .

Further, according to the invention, the underwater curable adhesive composition is applied to a fuel storage tank in a nuclear power plant, and is a two-component underwater curable adhesive main agent or the underwater curable adhesive main agent. It is characterized by containing a radiation-resistant additive.
Thus, by mix | blending a radiation-resistant additive, the underwater hardening type adhesive composition which can maintain the radiation-resistant characteristic after repair favorably can be provided low.

Further, as a method invention, in the micro defect repairing method for repairing micro defects of the lining material lined on the inner peripheral side of the open container functioning as a water tank under water using an underwater curable adhesive composition,
A metal partition that surrounds the periphery of the microdefect with a space that secures a distance corresponding to the “adhesion length from the microdefect” that is necessary when repairing the microdefect with the underwater curable adhesive composition. The open surface of the body is brought into contact with the wall surface of the lining material to form a recessed space between the wall surface of the lining material and the partitioning partition, and the underwater curing type is provided through an opening provided above the partitioning body in the gravity direction. The adhesive composition is fed, and the partition body is closely packed around the minute defect through the underwater curable adhesive composition fed from the opening to repair the minute defect of the lining material under water. It is characterized by.

  The filling nozzle for feeding the underwater curable adhesive composition through the opening into the recessed space formed by contacting the partition with the wall surface of the lining material is inserted into the recessed space at the tip of the nozzle. The extension nozzles are connected to each other, and the extension nozzles after the resin is filled and solidified in the compartments through the extension nozzles are cut and left in the filled and solidified body.

In addition, a filling nozzle filling nozzle for feeding the underwater curable adhesive composition into the recessed space formed by contacting the partition with the wall surface of the lining material is inserted into the recessed space at the tip of the nozzle. The extension nozzle is connected to the
The tip of the extension nozzle secures a distance corresponding to the adhesion length from the minute defect located in the recess space and extends from the lower area to an arbitrary position between the bottom positions of the partition bodies. The extension nozzle after the resin is filled and solidified in the compartment is cut and left in the filled and solidified body.

Further, when an opening is provided at the tip of the filling nozzle or the extension nozzle, the tip of the filling nozzle is provided apart from the bottom of the recess space, and the adhesive composition derived from the nozzle tip opening is the minute The concave space is filled while being laminated from below the bonding length of the defect upward.
Furthermore, when the tip of the filling nozzle or extension nozzle and the bottom of the recess space are provided in contact with each other, a side outlet opening of the adhesive composition is formed on the side surface of the tip of the filling nozzle or extension nozzle, and the side surface The recess space is filled while being laminated from the lead-out opening toward the minute defect side from the bottom of the recess space.
Thereby, the same effect as the above-described device invention can be obtained.

In addition, in the micro defect repairing device for repairing the micro defects of the lining material lined on the inner peripheral side of the water tank under water using an underwater curable adhesive composition,
A metal partition that surrounds the periphery of the microdefect with a space that secures a distance corresponding to the “adhesion length from the microdefect” that is necessary when repairing the microdefect with the underwater curable adhesive composition. The body is formed so that the open surface of the partitioning body can be in contact with the wall surface of the lining material, and a filling nozzle for feeding the underwater curable adhesive composition can be inserted into the position above the partitioning body in the gravity direction The present invention also includes a microdefect repaired body in which the partition body is closely packed around the microdefect through an underwater curable adhesive composition fed through the opening.

Further, the above-described minute defect repairing body is such that the filling nozzle for feeding the underwater curable adhesive composition from the opening into the recessed space formed by contacting the partitioning body with the lining material wall surface, An extension nozzle is connected to a portion to be inserted into the recessed space, and the extension nozzle after the resin is filled and solidified in the partition through the extension nozzle is cut and left in the filled and solidified body. And
The above-described configurations can be combined with each other without departing from the spirit of the present invention.

As described above, in the present invention, it is possible to easily repair minute defects of the lining material lined on the inner peripheral side of the water tank underwater using an underwater curable adhesive composition. That is, by forming a partition section surrounding the periphery of the minute defect, the underwater curable adhesive composition is cured in close contact with the minute defect, thereby preventing leakage. Moreover, since the said division body prevents scattering of the filled underwater curable adhesive composition, corrosion of a lining material can be prevented and it can be applied suitably also in a high temperature environment like a fuel storage water tank.
Furthermore, since the shape of the repair surface in which a micro defect exists is different, it can be easily repaired even if it has a three-dimensional structure in a water tank by selecting the division body according to the shape.
Furthermore, the filling time can be reduced by selecting the position and shape of the tip of the filling nozzle or the extension nozzle from the shape of the repair surface where the minute defect exists. And generation | occurrence | production of a water bubble can be prevented when filling an underwater curable adhesive composition, and it can carry out without involving a water bubble in filling of an adhesive composition.
In addition, the extension nozzle connected to the filling nozzle is cut after the underwater curable adhesive composition is cured, so that the filling nozzle can be lifted from the water without being sprayed into the water. is there.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.
FIG. 1 is a schematic view of a minute defect repairing apparatus according to a first embodiment of the present invention, FIG. 2 is a diagram for explaining a partition section body and an extension nozzle according to the first embodiment of the present invention, and FIG. 4 is a schematic view of a defect repairing device, FIG. 4 is a perspective view showing a partition section body and an extension nozzle of Example 2 of the present invention, and FIG. 5 shows a lead-out opening of an underwater curable adhesive composition provided on the side surface of the extension nozzle. FIG. 6, FIG. 6 is a sectional side view of the partition section in Example 3 of the present invention, FIG. 7 is a diagram showing the cutting timing of the extension nozzle, and FIG. It is a figure.

In the examples of the present invention, the underwater curable adhesive composition is not limited as long as it is cured in water and does not contradict the purpose of the present invention. However, considering that it is used in, for example, the fuel storage tank described above, the underwater curable adhesive composition is prepared by adding a radiation-resistant additive to the underwater curable adhesive main agent or the underwater curable adhesive main agent. It is preferable to become.
As the radiation-resistant additive, an aromatic amine-based additive for improving radiation durability is blended, and from the group consisting of modified aromatic polyamines such as diethyltoluenediamine, metaxylenediamine, and mensendiamine. It is preferred that it is at least one selected compound. Specific examples include Ecure Z (manufactured by Yuka Shell Epoxy Co., Ltd.), sunmide TX983 or M1800 (manufactured by Sanwa Chemical Co., Ltd.), and the like.
In addition, a boron-based additive for improving the neutron-resistant property is also used. As the boron-based additive, at least one compound selected from the group consisting of boron carbide, boron oxide, boron nitride, boron anhydride, iron borate, orthoboric acid and metaboric acid is suitable.
Furthermore, the present embodiment includes blending both the amine-based additive and the boron-based additive. The radiation-resistant additive is preferably blended in each of the main component and the curing agent of the two-component underwater adhesive composition.

  Examples of the main component of the two-component underwater adhesive composition include bisphenol type epoxy resins such as bisphenol A type epoxy resins and novolak type epoxy resins. On the other hand, the curing agent is at least selected from the group consisting of amines or polyamines such as polyamide amine, modified polyamide amine, modified polyamide polyamine, modified aliphatic polyamine, modified aromatic polyamine, heterocyclic polyamine, and modified alicyclic polyamine. One curing agent is preferred.

  That is, as the reaction curable resin, an epoxy resin is used, and a resin using the curing agent as described above is suitable. Furthermore, bisphenol A type glycidyl ether (manufactured by Yuka Shell Epoxy Co., Ltd .: Epicoat # 828) is used as the main agent, and a modified polyamine (manufactured by Asahi Denka Kogyo Co., Ltd .: Adeka Hardener EH265-4) At least one of polyamide polyamine (manufactured by Three Bond Co., Ltd .: Three Longi W805), modified aliphatic polyamine (manufactured by Fuji Kasei Kogyo Co., Ltd .: Fuji Cure F5405), modified polyamide polyamine (manufactured by Daito Sangyo Co., Ltd .: Daito Cider HR787), and the like. What is used is preferred.

It is also possible to use Daito Cider HR (Daito Sangyo), Three Bond W805 (Three Bond), Permaster WE300 (manufactured by China Paint Co., Ltd.), etc., which are commercially available by combining the main agent and the curing agent in advance. Here, Permaster WE300 was used in the following examples.
Moreover, in the present Example, the stainless steel lining material was used on the concrete basic surface of the fuel storage water tank as the lining material on the inner peripheral side of the water tank, and minute defects of this stainless steel lining material were carried out.

FIG. 8 shows the relationship between the reaction rate (curing speed) at ambient temperature and the viscosity of the underwater curable adhesive composition used in this example.
The underwater curable adhesive composition has a low viscosity at a high temperature but a high curing rate. Therefore, the filling speed is increased. On the other hand, at low temperatures, the viscosity is high but the curing rate is slow. Therefore, the filling speed is reduced.
Therefore, it is necessary to select the optimal filling condition by adjusting the liquid feeding speed of the adhesive composition and the output of the motor of the micro defect repairing device according to the environmental temperature. In this example, the preferred environmental temperature was 10 to 45 ° C. This environmental temperature is a temperature determined in consideration of the components of the adhesive composition not denatured and the motor load.

First, with reference to FIGS. 1 and 2, Example 1 in the case where the minute defect is on the side surface of the water lining material will be described. FIG. 1A is a schematic view of a filling nozzle, and FIG. 1B is a schematic view of a partition section formed on the side surface of the lining material.
As shown in FIG. 1, the filling nozzle 5 is provided with a main agent cartridge 16 for filling the main agent 10 of the underwater curable adhesive composition and a hardener cartridge 17 for filling the hardener 11. In the main agent cartridge 16, the main agent hose 12 is connected to a pipe joint 30 a connected thereto, and the other end side of the main agent hose 12 is connected to one inlet side of the bifurcated pipe joint 30.
Similarly, the hardener cartridge 17 has a hardener hose 13 connected to a pipe joint 30b connected thereto, and the other end of the hardener hose 13 is connected to the other inlet side of the bifurcated pipe joint 30. is doing. This bifurcated pipe joint 30 joins flow paths in two directions in one direction.

The main agent 10 and the hardener 11 filled in the main agent cartridge 16 and the hardener cartridge 17 are pumped by the motor 15 and mixed by the mixing nozzle 14 connected to the bifurcated pipe joint 30 to be an underwater curable adhesive. It becomes a composition. Here, the ratio of the main agent 10 and the curing agent 11 was 1: 1.
The filling nozzle 5 is inserted into a metal partitioning partition 3 formed so as to surround the minute defect 1 of the lining material 2 lined on the inner peripheral side of the water tank. Then, the underwater curable adhesive composition 6 is fed into the partition 3 through the extension nozzle 4 connected to the tip of the filling nozzle 5 and is filled and cured to repair the minute defect 1.

  Although not shown, in the above-described minute defect repairing apparatus, the partition section 3 is formed using a robot arm while being monitored by a CCD camera. Further, while the filling nozzle 5 is monitored with a CCD camera, the filling nozzle 5 may be moved in the X-axis, Y-axis, and Z-axis directions and appropriately positioned with respect to the minute defect 1 to monitor the filling state.

Here, the tip positions of the partition section 3 and the extension nozzle 4 in the first embodiment will be described with reference to FIG. The partition section 3 needs to be formed with a distance corresponding to the “adhesion length from the minute defect” necessary for repairing the minute defect 1 with the underwater curable adhesive composition. This “adhesion length from a minute defect” is defined as D. In this embodiment, the adhesion length D from a minute defect is approximately 4 cm when the environmental temperature is 10 to 45 ° C.
As shown in FIG. 2A, the partition 3 has a length in which the surface opposite to the open surface that contacts the side surface surrounds the periphery of the microdefect 1 and the adhesive length D is suspended from the microdefect. A wide-area closed surface, and a band-shaped side wall is formed around the wide-area closed surface so as to surround the side surface of the lining material, and the upper side is formed to be an opening into which the filling nozzle 5 can be inserted The

Further, as shown in FIG. 2 (b), the tip of the extension nozzle 4 is inserted into the concave space of the partition partition body 3 to secure the adhesion length D ′ from the minute defect and from the lower area thereof. It extends to an arbitrary position between the bottoms of the partition sections 3. When the distal end portion of the extension nozzle 4 is provided apart from the bottom portion of the partition section 3, D> D ′. Further, the tip portion of the extension nozzle 4 may be provided in contact with the bottom portion of the partition section 3. At this time, D = D ′.
Although not shown, the position of the filling nozzle 5 is preferably the same as the position of the extension nozzle 4.

Next, with reference to FIG. 3 and FIG. 4, Example 2 in the case where the minute defect is on the bottom surface of the aquarium liner is described. FIG. 3 is a schematic view of the micro defect repairing apparatus when the micro defect is on the bottom surface.
The filling nozzle 5 is provided separately with a main agent cartridge 16 for filling the main agent 10 of the underwater curable adhesive composition and a hardener cartridge 17 for filling the hardener 11. A CCD camera 18 connected to the CCD camera cable 20 is also fixed to the filling nozzle 5 by a fixing support 19. In the main agent cartridge 16, the main agent hose 12 is connected to a pipe joint 30 a connected thereto, and the other end side of the main agent hose 12 is connected to one inlet side of the bifurcated pipe joint 30.
Similarly, the hardener cartridge 17 has a hardener hose 13 connected to a pipe joint 30b connected thereto, and the other end of the hardener hose 13 is connected to the other inlet side of the bifurcated pipe joint 30. is doing. This bifurcated pipe joint 30 joins flow paths in two directions in one direction.

The main agent 10 and the hardener 11 filled in the main agent cartridge 16 and the hardener cartridge 17 are pumped by the motor 15 and mixed by the mixing nozzle 14 connected to the bifurcated pipe joint 30 to be an underwater curable adhesive. It becomes a composition. Here, the ratio of the main agent 10 and the curing agent 11 was 1: 1.
The filling nozzle 5 is inserted into a metal partitioning partition 3 formed so as to surround the minute defect 1 of the lining material 2 lined on the inner peripheral side of the water tank. At this time, while being monitored by the CCD camera 18, the filling nozzle is moved in the X-axis, Y-axis, and Z-axis directions and is appropriately positioned with respect to the minute defect 1. Thereafter, the underwater curable adhesive composition 6 is fed into the partition wall 3 formed on the bottom surface through the extension nozzle 4 connected to the tip of the filling nozzle 5, filled and cured, and the micro defect 1 is formed. Repair.
Although not shown, as in the first embodiment, the partition section 3 is formed using a robot arm while monitoring with a CCD camera.

  Here, the tip positions of the partition section 3 and the extension nozzle 4 in the second embodiment will be described with reference to FIG. When the minute defect is on the bottom surface of the lining material 2, the partitioning partition 3 surrounds the periphery of the wide enclosed space having a length obtained by extending the adhesion length D from the minute defect located on the bottom surface. A band-shaped side wall is formed surrounding the bottom surface of the material 2 so as to be an opening or an open space into which the filling nozzle 5 can be inserted in the space above the bottom surface.

  When the minute defect 1 of the lining material 2 is on the bottom surface of the water tank lining material, the tip of the filling nozzle 5 or the extension nozzle 4 is provided in contact with the minute defect 1. By bringing the tip of the filling nozzle 5 or the extension nozzle 4 into contact with the bottom surface, entrainment of water bubbles can be prevented.

The means for providing the tip of the extension nozzle 4 in contact with the bottom of the partitioning partition 3 as described above is to prevent entrainment of water bubbles when the underwater curable adhesive composition is filled in the partitioning partition 3. Is a useful tool.
However, since the outlet port for the underwater curable adhesive composition is actually provided at the end face of the tip, it must be filled several centimeters away from the bottom surface, which may cause water bubbles to be involved. Also, the filling time becomes longer.

Therefore, when the tip of the extension nozzle 4 is provided in contact with the bottom of the partition 3, an outlet opening for the underwater curable adhesive composition is formed on the side of the tip of the extension nozzle 4 as shown in FIG. did. The lead-out opening shown in FIG. 5 can be freely formed without departing from the spirit of the present invention.
As shown in FIG. 5, the extension nozzle 4 can be inserted up to the bottom of the partition section 3 by providing a lead-out opening on the side surface of the tip. Moreover, entrainment of water bubbles can be prevented, and the filling time can be shortened.

Next, Example 3 in the case where the minute defect is in the overhang portion of the water lining material will be described with reference to FIG. FIG. 6 shows an example of a side cross-sectional view of the partition section in the overhang portion on the side surface of the water lining material. FIG. 6A shows the partitioning partition 3 when the overhanging portion has the microdefect 1, and FIG. 6B shows the partitioning partitioning body when the microdefect 1 is under the thickness portion of the overhanging portion. 3 is shown.
As shown in FIG. 6A, when the minute defect 1 is in the overhang portion of the lining material 2, the height B of the partition section 3 must exceed the valley portion A of the overhang portion. That is, the partition body 3 needs to have a height that satisfies B> A.
Further, as shown in FIG. 6B, when the minute defect 1 is below the thickness portion of the overhang portion of the lining material 2, the portion including the minute defect 1 is included and the valley portion of the overhang portion is exceeded. The partition section 3 must have a height that satisfies B> C.
Although not shown in the drawings, as described in any of the examples, the partition member 3 must be formed with a space for securing the adhesion length D from the minute defect in all directions. Moreover, the tip part of the filling nozzle 5 or the extension nozzle 4 at this time secures the adhesion length D from the minute defect as in the first and second embodiments, and the bottom of the partitioning partition 3 from the lower area. They may be provided apart from each other, or may be provided in contact with the bottom of the partition section 3.

Finally, the pulling means for the filling nozzle 5 will be described with reference to FIG. The micro defect repairing apparatus in the present invention feeds the underwater curable adhesive composition for a while with back pressure even after the motor is stopped after filling the underwater curable adhesive composition 6. If the filling nozzle 5 is pulled up at this stage, the uncured adhesive composition will be scattered in the water. In order to prevent this, the cutting of the extension nozzle 4 as shown in FIG. 7 was devised.
After the underwater curable adhesive composition 6 is filled into the partition 3, the adhesive composition is left until the adhesive composition is cured (FIG. 7A). After the underwater curable adhesive composition 6 is cured, the extension nozzle 4 connected to the filling nozzle 5 is cut by a robot (FIG. 7B). After cutting off the extension nozzle 4, the filling nozzle 5 is pulled up from the partition section 3 (FIG. 7 (c)).

In this way, by leaving the extension nozzle 4 in the filled solidified body in which the partition section 3 is filled and solidified with the underwater curable adhesive composition 6, the uncured underwater curable adhesive composition 6 is submerged in the water. The filling nozzle 5 can be pulled up without being sprayed.
Although not shown in the drawings, in the case where the scattering of the underwater curable adhesive composition 6 is allowed to some extent in the partition 3, before the underwater curable adhesive composition 6 is cured after filling the partition 3 with resin. The underwater curable adhesive composition 6 corresponding to the extension volume of the extension nozzle 4 is filled without any defects by pulling out the filling nozzle 5 while feeding the extension nozzle 4 while feeding the underwater curable adhesive composition 6 to the surface. The nozzle 5 may be pulled up.

  By the above-mentioned means, it is possible to prevent the underwater curable adhesive composition 6 from being scattered in the water tank. Further, in the present invention, a flexible polymer material is applied to the portion of the partition member 3 that contacts the lining material 2 to prevent leakage of the adhesive composition from the gap between the partition member 3 and the lining material 2. May be.

  By using the micro defect repairing apparatus in the present embodiment, it is possible to easily repair micro defects in the lining material lined on the inner peripheral side of the water tank underwater using an underwater curable adhesive composition. Become. Moreover, since the partition division body in a present Example can be installed according to the shape of a defective part vicinity also in the water tank which has the three-dimensional structure in the tank, the lining welding part SCC ( (Stress corrosion cracks) It can also be suitably used for emergency repair in water when microleakage associated with damage is observed.

It is the schematic of the micro defect repair apparatus in Example 1. FIG. It is a figure explaining the partition division body and extension nozzle of Example 1. FIG. It is the schematic of the micro defect repair apparatus in Example 2. FIG. It is a perspective view which shows the partition division body of Example 2, and an extension nozzle. It is a sectional side view of the partition division body in Example 3. It is a figure which shows the derivation | leading-out opening of the underwater hardening type adhesive composition provided in the extended nozzle front end side surface. It is a figure which shows the cutting timing of an extension nozzle. It is the figure which showed the relationship between the reaction rate in the ambient temperature (curing speed) and viscosity of an underwater hardening type adhesive composition.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Minute defect 2 Lining material 3 Partition division body 4 Extension nozzle 5 Filling nozzle 15 Motor 18 CCD camera D Bonding length from a minute defect

Claims (17)

In the micro defect repair device that repairs micro defects of the lining material lined on the inner peripheral side of the water tank underwater using an underwater curing type adhesive,
A metal partition that surrounds the periphery of the microdefect with a space that secures a distance corresponding to the “adhesion length from the microdefect” that is necessary when repairing the microdefect with the underwater curable adhesive composition. The body is formed so that the open surface of the partitioning body can be in contact with the wall surface of the lining material, and a filling nozzle for feeding the underwater curable adhesive composition can be inserted into the position above the partitioning body in the gravity direction An apparatus for repairing a micro defect, wherein the partition body is configured to tightly fill around the micro defect through an underwater curable adhesive composition fed from the opening. When there are minute defects in the tank lining material on the side of the tank lining material,
The partition body is a wide-area closed surface having a length in which the surface opposite to the open surface in contact with the side surface surrounds the periphery of the micro-defect, and has a length depending on the adhesion length from the micro-defect, 2. The minute defect repairing apparatus according to claim 1, wherein a belt-like side wall is formed so as to surround the side surface of the lining material, and the upper side is an opening into which a filling nozzle can be inserted. When the minute defect of the tank lining material is on the bottom surface of the tank lining material,
The partition body surrounds a wide surrounding space having a length obtained by extending a bonding length from a micro defect located on the bottom surface, and a belt-shaped side wall surrounds a portion in contact with the bottom surface of the lining material. The minute defect repairing device according to claim 1, wherein the device is formed as an opening or an open space into which a filling nozzle can be inserted in a space above the bottom surface.   The filling nozzle for feeding the underwater curable adhesive composition into the recessed space formed by contacting the partition with the wall surface of the lining material extends from the opening to the portion inserted into the recessed space at the tip of the nozzle. The nozzle is connected, and the extension nozzle after the resin is filled and solidified in the compartment through the extension nozzle is cut and left in the solidified body. Small defect repair device. The filling nozzle for feeding the underwater curable adhesive composition into the recessed space formed by contacting the partition with the wall surface of the lining material extends from the opening to the portion inserted into the recessed space at the tip of the nozzle. The nozzles are connected,
The tip of the extension nozzle is secured to a distance corresponding to the adhesion length from a minute defect located in the recess space, and extends from the lower area to an arbitrary position between the partition bottom positions. The minute defect repairing device according to claim 1, 2, 3, or 4.   The tip of the filling nozzle is provided in a lower region while ensuring a bonding length from the micro defect when a micro defect of the water tank liner is on a side surface of the water tank liner. Micro defect repair equipment.   4. The micro defect repair according to claim 3, wherein when the micro defect of the water tank liner is on the bottom surface of the water tank liner, the tip of the filling nozzle or the extension nozzle is provided in contact with the micro defect. apparatus.   7. The micro of any one of claims 1 to 6, wherein when the opening of the filling nozzle or the extension nozzle has an opening, the tip of the filling nozzle is provided apart from the bottom of the recess space. Defect repair device.   When the tip of the filling nozzle or extension nozzle and the bottom of the recessed space are provided in contact with each other, an adhesive composition outlet opening is formed on the side surface of the tip of the filling nozzle or extension nozzle. Item 7. The minute defect repairing device according to any one of Items 1 to 6.   The underwater curable adhesive composition is applied to a fuel storage tank in a nuclear power plant, and a two-component underwater curable adhesive main agent or the underwater curable adhesive main agent is mixed with a radiation-resistant additive. The micro defect repairing device according to any one of claims 1 to 9, wherein In the micro defect repair method of repairing underwater using a submersible adhesive, the microdefect of the lining material lined on the inner peripheral side of the open container that functions as a water tank,
A metal partition that surrounds the periphery of the microdefect with a space that secures a distance corresponding to the “adhesion length from the microdefect” that is necessary when repairing the microdefect with the underwater curable adhesive composition. The open surface of the body is brought into contact with the wall surface of the lining material to form a recessed space between the wall surface of the lining material and the partitioning partition, and the underwater curing type is provided through an opening provided above the partitioning body in the gravity direction. The adhesive composition is fed, and the partition body is closely packed around the minute defect through the underwater curable adhesive composition fed from the opening to repair the minute defect of the lining material under water. A micro defect repair method characterized by   The filling nozzle for feeding the underwater curable adhesive composition into the recessed space formed by contacting the partition with the wall surface of the lining material extends from the opening to the portion inserted into the recessed space at the tip of the nozzle. 12. The method for repairing a micro defect according to claim 11, wherein the nozzle is connected, and the extension nozzle after the resin is filled and solidified in the compartment through the extension nozzle is cut and left in the filling and solidification body. . The filling nozzle for feeding the underwater curable adhesive composition into the recessed space formed by contacting the partition with the wall surface of the lining material extends from the opening to the portion inserted into the recessed space at the tip of the nozzle. The nozzles are connected,
The tip of the extension nozzle secures a distance corresponding to the adhesion length from the minute defect located in the recess space and extends from the lower area to an arbitrary position between the bottom positions of the partition bodies. 13. The micro defect repairing method according to claim 11 or 12, wherein the extension nozzle after the resin is filled and solidified in the partition is cut and left in the filled solidified body.   When the tip of the filling nozzle or the extension nozzle has an opening, the tip of the filling nozzle is provided apart from the bottom of the concave space, and the adhesive composition derived from the nozzle tip opening is free of the micro defect. The method for repairing microdefects according to any one of claims 11 to 13, wherein the concave space is filled while being laminated from the lower side to the upper side of the bonding length.   When the tip of the filling nozzle or extension nozzle and the bottom of the recess space are provided in contact with each other, a side outlet opening for the adhesive composition is formed on the side of the tip of the filling nozzle or extension nozzle, 14. The micro defect repair method according to claim 11, wherein the recess space is filled while being laminated from the bottom of the recess space toward the micro defect side. In the micro defect repairing device that repairs micro defects of the lining material lined on the inner peripheral side of the water tank under water using an underwater curable adhesive composition,
A metal partition that surrounds the periphery of the microdefect with a space that secures a distance corresponding to the “adhesion length from the microdefect” that is necessary when repairing the microdefect with the underwater curable adhesive composition. The body is formed so that the open surface of the partitioning body can be in contact with the wall surface of the lining material, and a filling nozzle for feeding the underwater curable adhesive composition can be inserted into the position above the partitioning body in the gravity direction A microdefect repaired body in which the partition body is closely packed around the microdefect through an underwater curable adhesive composition fed through the opening.   The filling nozzle for feeding the underwater curable adhesive composition into the recessed space formed by contacting the partition with the wall surface of the lining material extends from the opening to the portion inserted into the recessed space at the tip of the nozzle. 17. The repair of a minute defect according to claim 16, wherein the nozzle is connected, and the extension nozzle after the resin is filled and solidified in the compartment through the extension nozzle is cut and left in the filling and solidification body. body.

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