KR102675264B1 - Seawater pipe leakage blocking system and method of nuclear power plant - Google Patents

Abstract

Provides a system and method for blocking seawater piping leaks in nuclear power plants. The seawater piping leak blocking system of a nuclear power plant is a seawater piping leak blocking system of a nuclear power plant, and includes a seawater piping in which a leak occurs; and a leakage response module installed in the seawater pipe to repair the leakage portion, wherein the leakage response module includes a contact pad installed to seal the leakage portion and surrounds at least a portion of the circumference of the seawater pipe. It includes a strip structure that secures the contact pad to the seawater pipe.

Description

Seawater pipe leakage blocking system and method of nuclear power plant}

The present invention relates to a seawater pipe leak blocking system and method.

Seawater piping in nuclear power plants plays an important role in supplying cooling water to remove heat from primary and secondary equipment. However, leakage of pipes due to corrosion can cause system interruption and power plant shutdown. Therefore, early response to a nuclear power plant leak is most important. However, since separate equipment for the leakage part must be manufactured, the response time is considerable, and there are problems such as increased weight and difficulty in standardizing and quantifying the applied procedures.

In addition, the separate equipment manufactured can only be applied to straight pipes or standardized shapes, so there is a problem in that it cannot be applied to branch pipes such as elbows and tees. In addition, when taking countermeasures against leaks, it is difficult to manage the structural integrity of the pipes because the speed and extent of corrosion inside the pipes cannot be confirmed.

Korean Patent No. 10-1049429

The problem to be solved by the present invention is to provide a seawater piping leak blocking system for a nuclear power plant that can be installed/removed as quickly as possible on site without stopping the power plant or system when a seawater piping leak occurs.

In addition, it is widely applicable regardless of the location and type of application, and provides a seawater piping leakage blocking system for nuclear power plants that can standardize installation procedures by overcoming the non-proceduralization/non-quantification that is problematic in existing temporary measures. will be.

In addition, it provides a seawater piping leakage blocking system for nuclear power plants that can be quantified through prior verification of pressurizing force when applied widely, regardless of the location and type of application.

In addition, the growth of corrosion damage over time can be confirmed through ultrasonic thickness measurement, providing a leakage blocking system for seawater piping in nuclear power plants that can predict the remaining life of the pipe and inspect and manage deterioration.

The problems of the present invention are not limited to the problems mentioned herein, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

A seawater piping leak blocking system for a nuclear power plant according to an aspect of the present invention for achieving the above task is a seawater piping leak blocking system for a nuclear power plant, comprising: a seawater piping in which a leak occurs; and a leakage response module installed in the seawater pipe to repair the leakage portion, wherein the leakage response module includes a contact pad installed to seal the leakage portion and surrounds at least a portion of the circumference of the seawater pipe. It includes a strip structure that secures the contact pad to the seawater pipe.

A method for blocking leakage in seawater piping of a nuclear power plant according to another aspect of the present invention to achieve the above problem includes the steps of generating a leak in the seawater piping; And a step of installing a leak response module in the seawater pipe to repair the leak, wherein the leak response module includes a contact pad installed to seal the leak, and at least a portion of the circumference of the seawater pipe. It includes a strip structure that surrounds and secures the contact pad to the seawater pipe.

In addition, the contact pad includes a first response part that is an area corresponding to the leakage part, a second response part that is provided in a rigid type in and around the first contact area, and a flexible type in the first contact area and its surroundings. and a third corresponding part, wherein at least one of the second to third corresponding parts is installed to correspond to a peripheral portion of the leakage part.

In addition, the contact pad is provided with one or more mounting grooves in which an ultrasonic probe is installed, and the seawater pipe measures thickness and pipe remaining through a monitoring means linked with the ultrasonic probe while the leakage response module is installed in the leakage portion. At least one item among life prediction and deterioration is monitored.

Additionally, the second corresponding portion and the third corresponding portion are provided so that at least some areas are alternately disposed between each other.

In addition, the leak response module further includes a fixture for fixing the strip structure wound around the seawater pipe, and the fixture includes a lower plate, an upper plate facing the lower plate, and the lower plate. A guide roller is provided on both sides and rotates in a hinged manner and guides both ends of the strip structure, and is provided on both sides of the upper plate and rotates in a hinged way, and guide rollers are provided on the upper plate to rotate in a hinged manner. It includes a binding fixture that allows both ends of the strip structure to be wound and press-fitted, and an interlocking body that interlocks the lower plate and the upper plate to enable mutual position movement, and the strip structure is configured to Pressure fixing of the contact pad is performed on the lower plate and the upper plate.

In addition, the linkage body includes a bar-shaped guide portion that passes through the upper plate and is installed on the lower plate, and is installed on the lower plate through the upper plate and is connected to the upper plate and the lower plate. It includes a fastening part installed by a screw coupling method, wherein the upper plate is connected to the upper part from the lower plate based on the forward or reverse rotation of the fastening part in a state in which both ends of the strip structure are press-fitted to the binding fixture. It flows downward to strengthen the press-fitted state, or flows downward to release the press-bonded state.

A seawater piping leak blocking system and method according to another aspect of the present invention for achieving the above task is a seawater piping leak blocking monitoring method of a nuclear power plant, which includes the steps of generating a leak in the seawater piping; And a step of installing a leak response module in the seawater pipe to repair the leak, wherein the step of repairing the leak is where the contact pad of the leak response module is located on the leak. A step in which the strip structure of the leakage response module is installed to surround the seawater pipe to include the contact pad, and a step in which both ends of the strip structure are interlocked with the fixture of the leakage response module, and the strip A step in which both ends of the structure are first tightened by a manual method in the fixture, a step in which both ends of the strip structure are secondarily tightened in the fixture by a first tightening means, and both ends of the strip structure are tightened in a manual manner. It includes the stage of final fixation from stagnation to the second and third tightening operations using the second tightening means.

According to the seawater pipe leakage blocking system and method of the present invention as described above, one or more of the following effects are achieved.

The present invention can provide a seawater piping leak blocking system for a nuclear power plant that can be installed/removed as quickly as possible on site without stopping the power plant or system when a seawater piping leak occurs.

In addition, we will provide a seawater piping leakage blocking system for nuclear power plants that can be broadly applied regardless of the location and type of application, and can standardize installation procedures by overcoming the non-proceduralization/non-quantification that is problematic in existing temporary measures. You can.

In addition, it is possible to provide a seawater piping leakage blocking system for nuclear power plants that can be quantified through prior verification of pressurizing force when applied widely regardless of the location and type of application.

In addition, the growth of corrosion damage over time can be confirmed through ultrasonic thickness measurement, providing a leakage blocking system for seawater piping in nuclear power plants that can predict the remaining life of the pipe and inspect and manage deterioration.

Figure 1 is a diagram showing the configuration of a seawater piping leakage blocking system for a nuclear power plant according to an embodiment of the present invention.
Figures 2 and 3 are diagrams showing the contact pad according to Figure 1.
Figure 4 is a diagram showing the installation state of the leakage response module according to Figure 1.
Figure 5 is a diagram showing the installation state of the contact pad according to Figure 1.
Figure 6 is a diagram showing a monitoring state through the leakage response module according to Figure 1.
FIG. 7 is a diagram illustrating a configuration for monitoring according to FIG. 6.
Figures 8 to 11 are diagrams showing the configuration according to Figure 1.
Figure 12 is a flow chart sequentially showing a method for blocking seawater pipe leakage in a nuclear power plant according to an embodiment of the present invention.
FIG. 13 is a diagram showing the configuration according to FIG. 12.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely intended to ensure that the disclosure of the present invention is complete and to provide common knowledge in the technical field to which the present invention pertains. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Referring to Figure 1, the seawater piping leak blocking system of a nuclear power plant (hereinafter referred to as the "leakage blocking system 100") according to an embodiment of the present invention includes a seawater piping 10 and a leak response module 110. do. The leak response module 110 includes a contact pad 111, a strip structure 112, and a fixture 113. (see Figure 6)

Here, the contact pad 111 includes a first corresponding part 1111, a second corresponding part 1112, and a third corresponding part 1113. The fixture 113 includes a lower plate 1131, an upper plate 1132, a guide roller 1131a, a binding fixture 1132a, and linkages 1141 and 1142. (See Figures 2 to 4 and Figure 8)

The linked bodies 1141 and 1142 include a guide bar 1141 and a fastening portion 1142. The seawater pipe 10 of the leakage blocking system 100 may have a leakage portion 15. The leakage response module 110 is installed in the seawater pipe 10 to repair the leakage part 15. (See Figure 1)

In addition, the contact pad 111 of the leakage response module 110 is installed to seal the leakage portion 15. The strip structure 112 of the leakage response module 110 is installed to surround at least a portion of the circumference of the seawater pipe 10. (See Figures 2 to 5)

The leakage response module 110 fixes the contact pad 111 to the seawater pipe 10. The first corresponding portion 1111 of the contact pad 111 corresponds to an area corresponding to the leakage portion 15. The second corresponding portion 1112 of the contact pad 111 is provided in a rigid type around the first corresponding portion 1111. (See Figures 4 and 5)

The third corresponding part 1113 of the contact pad 111 is provided in a flexible type around the first corresponding part 1111. At least one of the second response portion 1112 to the third response portion 1113 is installed to correspond to the peripheral portion of the leakage portion 15. (See Figures 4 and 5)

The contact pad 111 of the leakage response module 110 is provided with one or more mounting grooves 1111a in which the ultrasonic transducer 122 is installed. The seawater pipe 10 is monitored by installing the leak response module 110 in the leak part 15. (See Figures 2 to 3 and Figure 6)

Meanwhile, the seawater pipe 10 measures at least one of thickness measurement, pipe remaining life prediction, and deterioration through a monitoring means 121 linked to the ultrasonic transducer 122 with the leakage response module 110 installed. Items are monitored. (See Figures 5 to 7)

The second corresponding portion 1112 and the third corresponding portion 1113 of the contact pad 111 are provided so that at least some areas are alternately arranged with each other. The fixture 113 of the leak response module 110 fixes the strip structure 112. (See Figures 2 to 3 and Figure 6)

The fixture 113 of the leak response module 110 is for fixing the strip structure 112 installed in the seawater pipe 10. The fixture 113 has a structure including a plate structure. (See Figures 4, 8 and 9)

The fixture 113 of the leak response module 110 is provided with the lower plate 1131 and the upper plate 1132 facing each other. The upper plate 1132 of the fixture 113 faces the lower plate 1131 upwardly. (See Figures 8 and 9)

In addition, the guide rollers 1131a of the fixture 113 are provided on both sides of the lower plate 1131 and rotate in a hinged manner. The guide roller 1131a guides both ends of the strip structure 112 based on this axis rotation. (See Figures 4, 8 and 9)

The binding fixture 1132a of the fixture 113 is provided on both sides of the upper plate 1132 and rotates in a hinged manner such as a wedge shape. Both ends of the strip structure 112 via the guide rollers 1131a and 1131a are respectively wound and press-fitted to the binding fixture 1132a. (See Figures 4, 8 and 9)

The interlocking bodies 1141 and 1142 of the fixture 113 interlock the lower plate 1131 and the upper plate 1132 to enable mutual position movement. The strip structure 112 presses and fixes the contact pad 111 on the lower plate 1131 and the upper plate 1132 via the interlocking bodies 1141 and 1142. (See Figures 4, 8 and 9)

The guide bar 1141 of the linkages 1141 and 1142 passes through the upper plate 1132 and is installed on the lower plate 1131. The fastening portions 1142 of the linkages 1141 and 1142 are provided to move the upper plate 1132 up and down in a forward or reverse rotation on the lower plate 1131. (See Figures 4, 8 and 9)

Meanwhile, the upper plate 1132 is provided so that both ends of the strip structure 112 are press-fitted to the binding fixture 1132a. The upper plate 1132 strengthens or releases the state in which it is press-fitted to the binding fixture 1132a. (See Figures 4, 8 and 9)

The upper plate 1132 moves the upper plate 1132 upward from the lower plate 1131 based on the forward or reverse rotation of the fastening part 1142 to strengthen the press-fitted state, or Flow downward to release the press-fitted state. (See Figures 4, 8 and 9)

Referring to FIG. 12, the seawater piping leak blocking method of a nuclear power plant (hereinafter referred to as the "leakage blocking method 100") according to an embodiment of the present invention is a seawater piping leak blocking method of a nuclear power plant, and the seawater piping 10 ) A leakage part 15 is generated.

A leakage response module 110 is installed in the seawater pipe 10 to repair the leakage part 15. As described above, the leak response module 110 includes the above-described contact pad 111 and the strip structure 112.

In addition, the leak blocking method 100 according to another embodiment of the present invention is a seawater piping leak blocking method of a nuclear power plant, and a leak 15 is generated in the seawater piping 10.

A leakage response module 110 is installed in the seawater pipe 10 to repair the leakage part 15. For this repair, the contact pad 111 of the leakage response module 110 is located at the leakage portion 15.

As described above, the strip structure 112 of the leak response module 110 is installed to at least partially surround the seawater pipe 10 to include the contact pad 111. Both ends of the fixture 113 of the leakage response module 110 are interlocked with the strip structure 112.

The contact pad 111 has an opening 111H1 formed at the top. In addition, a first polygonal receiving space 111H2 larger than the opening 111H1 is formed inside. The opening 111H1 and the first polygonal receiving space 111H2 are installed to correspond to the leakage portion 15. Through this, the contact pad 111 can increase adhesion and sealing force to the leakage portion 15. (see Figure 10)

In addition, it is possible to form a second polygonal receiving space 111H3 directly at the top of the contact pad 111 without an opening 111H1. An O-ring 111R may be installed in the second polygonal receiving space. To this end, the second polygonal receiving space can be formed in a shape corresponding to the O-ring (111R). (see Figure 11)

Meanwhile, both ends of the strip structure 112 described above are pulled from the fixture 113 and a tightening operation is performed. Both ends of the strip structure 112 are subjected to a secondary tightening operation from the fixture 113 to the first tightening means 1143. Both ends of the strip structure 112 are fixed by a third tightening operation from the fixture 113 to the second tightening means 1144. (see Figure 13)

Although embodiments of the present invention have been described with reference to the above and the attached drawings, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. You will understand that it exists. Therefore, the embodiments described herein should be understood in all respects as illustrative and not restrictive.

10: Seawater pipe 15: Leakage part
110: Leakage response module 111: Contact pad
1111: First response unit 1112: Second response unit
1113: Third response unit 112: Strip structure
113: Fixture 120: Support pillar parts
121: Monitoring means 122: Ultrasonic probe

Claims (8)

As a method of blocking leakage in seawater piping of a nuclear power plant,
A step in which a leak occurs in a seawater pipe; and
It includes the step of installing a leak response module in the seawater pipe to repair the leak,
The leak response module is,
It includes a contact pad installed to seal the leakage portion, and a strip structure that surrounds at least a portion of the circumference of the seawater pipe and secures the contact pad to the seawater pipe,
The leakage response module further includes a fixture for fixing the strip structure installed in the seawater pipe,
The fixture is,
lower plate,
an upper plate facing the lower plate,
Guide rollers provided on both sides of the lower plate, rotated in a hinged manner, and guide both ends of the strip structure, respectively;
Binding fixtures provided on both sides of the upper plate to rotate in a hinged manner, and for winding and press-fitting both ends of the strip structure via the guide roller, respectively;
It includes an interlocking body that interlocks the lower plate and the upper plate to enable mutual position movement,
The strip structure is,
A method for blocking seawater pipe leakage in a nuclear power plant, wherein pressure fixation of the contact pad is performed on the lower plate and the upper plate via the interlocking body. According to paragraph 1,
The contact pad is,
A first response portion, which is an area corresponding to the leakage portion,
A second response part provided in a rigid type around the first response part, and
It includes a third response part provided in a flexible type around the first response part,
A method for blocking seawater piping leakage in a nuclear power plant, wherein at least one of the second to third response parts is installed to correspond to a peripheral area of the leakage part. According to paragraph 2,
The contact pad is provided with one or more mounting grooves in which an ultrasonic transducer is installed,
The seawater piping is,
A seawater pipe leak blocking method for a nuclear power plant in which at least one item of thickness measurement, pipe remaining life prediction, and deterioration is monitored through a monitoring means linked with the ultrasonic probe while the leak response module is installed in the leakage part. . According to paragraph 2,
A method for blocking seawater piping leakage in a nuclear power plant, wherein the second response unit and the third response unit are provided so that at least some areas are alternately arranged between each other. delete According to paragraph 1,
The linked body is,
A guide bar installed on the lower plate via the upper plate,
It is installed on the lower plate via the upper plate,
It includes a stud-type fastening part for moving the upper plate up and down in a forward or reverse rotation on the lower plate,
The upper plate is,
In a state where both ends of the strip structure are press-fitted to the binding fixture,
Based on the forward or reverse rotation of the fastening unit, the upper plate flows upward from the lower plate to strengthen the press-fitted state, or flows downward to release the press-fitted state, nuclear power How to block leakage in seawater piping of a power plant. delete delete