KR101178682B1 - Pipe inspection system and method thereof - Google Patents

Abstract

A pipe inspection system and a pipe inspection method are disclosed. According to one embodiment of the present invention, in a pipe inspection system for inspecting pipes, thickness reduction speed information and pipe operation number of years for the pipe are set using operation data, and the thickness reduction speed information and pipe A pipe thickness processor configured to generate pipe prediction thickness information by using the number of running years; And a life determination unit configured to set residual life information using the thickness reduction speed information, the pipe measurement thickness information, and the pipe prediction thickness information.

Description

PIPE INSPECTION SYSTEM AND METHOD THEREOF}

The present invention relates to a pipe inspection system, and more particularly, the present invention relates to a pipe inspection system and a pipe inspection method for checking the thickness reduction and the remaining life of the pipe included in the nuclear power plant.

Nuclear power is similar to chemical power in that it boils water to produce steam, which is then used to power turbines. However, a difference occurs in that the method of supplying the energy source for boiling water depends on the combustion reaction in the boiler in thermal power generation, but in the nuclear reactor in nuclear power generation.

Nuclear power generation can be classified into various types depending on the characteristics of the reactor. First of all, it can be divided into nuclear fission furnace by nuclear fission reaction and fusion by fusion reaction. In general, commercialized and conventional nuclear power generation refers to nuclear fission furnace, and it is still basic enough to be called dream reactor for nuclear fusion. R & D stage. Nuclear fission furnaces can be divided into high-speed propagation furnaces or thermal neutrons depending on the energy of the neutrons used in the nuclear fission reaction. Thermal neutrons can be divided into light water reactors, heavy water reactors, and graphite furnaces depending on the type of moderator for energy reduction of neutrons. Can be.

Heavy water reactors during nuclear power generation nuclear power generates electricity by heating steam with nuclear fission heat while coolant circulates through fuel channels and steam generators. Nuclear power consists of 380 nuclear fuel channels, with a header between the reactor and the steam generator. Nuclear power generation includes piping to connect each of the 380 fuel channels and the header, with 380 piping each connected to the reactor outlet and inlet.

Pipes are generally made of carbon steel, and the coolant flows at high speed and accelerates corrosion of the carbon steel, resulting in a thinner pipe. Corrosion of pipes is a very slow corrosion with a maximum speed of 0.15 mm / year or less, but there is a risk that the pipe thickness will be thinned below an allowable threshold as the plant continues to run for decades.

As a result, nuclear power plants require a high degree of reliability, and therefore, during the operation of nuclear power generation, periodic inspection of the thickness of pipes must be performed. However, in the related art, when nuclear power generation is in operation, a substance harmful to the human body is generated, and thus, the thickness of the pipe cannot be periodically measured, thereby causing a problem in that accuracy and reliability are significantly reduced.

One embodiment of the present invention is to provide a pipe inspection system and pipe inspection method that can determine the thickness reduction of the pipe connecting the nuclear fuel channel and the header of the heavy water reactor nuclear power plant.

In addition, an embodiment of the present invention is to provide a pipe inspection system and a pipe inspection method that can analyze the trend of thickness reduction for each of the plurality of pipes included in the heavy water reactor nuclear power generation.

In addition, an embodiment of the present invention to provide a pipe inspection system and pipe inspection method that can determine the remaining life for each of the plurality of pipes included in the heavy water reactor nuclear power generation.

According to one aspect of the invention, there is provided a piping inspection system for inspecting piping.

According to an embodiment of the present invention, in a pipe inspection system for inspecting pipes, thickness reduction speed information and pipe operation number of years for the pipes are set using operation data, and the thickness reduction speed information And a pipe thickness processor configured to generate pipe prediction thickness information using the pipe operation number of years. And a life determination unit configured to set residual life information using the thickness reduction speed information, pipe measurement thickness information, and pipe prediction thickness information.

The pipe thickness processor may include: an extraction unit configured to extract nuclear power generation service number information, mass flow rate information, and linear flow rate information corresponding to each of at least one pipe from the operation data; And setting the thickness deceleration speed information using the mass flow rate information and the linear flow rate information corresponding to each of the at least one pipe, and using the nuclear power generation operation train information and the thickness deceleration speed information. And a setting unit for setting information.

In this case, the setting unit selects the maximum thickness reduction speed information from the at least one thickness reduction speed information, sets the thickness reduction proportional speed information by converting the thickness reduction speed information based on the maximum thickness reduction speed information, The pipe running training information is set using the nuclear power generation running training information and the thickness reduction proportional speed information.

The thickness processor may generate average proportional speed information by calculating an average of the at least one thickness reduction proportional speed information, and generates the average proportional speed information by using the average proportional speed information, the pipe operation number of years, and the initial pipe thickness information. The apparatus further includes a predictor configured to set pipe prediction thickness information.

The thickness processor may generate a standard deviation value by calculating a standard deviation using an error between the pipe prediction thickness information corresponding to each of the at least one pipe and the pipe measurement thickness information. The calculation unit may further include a calculation unit configured to calculate a standard deviation value for the thickness reduction speed information corresponding to the pipe to generate the reduction speed standard deviation value.

The life determining unit sets the remaining life information using the thickness reduction speed information, the pipe measurement thickness information, and the pipe allowable thickness information included in the operation data.

The life determination unit generates pipe setting thickness information using the pipe measurement thickness information and the thickness standard deviation value, and uses the thickness reduction speed information, the pipe setting thickness information, and the pipe allowable thickness information. Set the remaining life information.

The life determination unit may generate deceleration setting speed information using the thickness reduction speed information and the deceleration speed standard deviation value, and use the deceleration setting speed information, the pipe setting thickness information, and the pipe allowable thickness information. The remaining life information is set.

And, according to one aspect of the invention, there is provided a pipe inspection method for the pipe inspection system to inspect the pipe.

According to an embodiment of the present invention, a pipe inspection method for inspecting a pipe by a pipe inspection system, comprising: (a) receiving operation data and measurement data; (b) setting thickness reduction speed information and pipe running number information for the pipe using the operation data; (c) generating pipe prediction thickness information using the thickness reduction speed information and the pipe operation years information; And (d) setting residual life information using the thickness reduction speed information, pipe measurement thickness information included in the measurement data, and pipe prediction thickness information.

The step (b) may include extracting nuclear power generation service number information, mass flow rate information and linear flow rate information corresponding to each of at least one pipe from the operation data; Setting the thickness reduction speed information by using the mass flow rate information and the linear flow rate information corresponding to each of the at least one pipe; And setting the pipe running training information by using the nuclear power generation running training information and the thickness reduction speed information.

In addition, the step (b) may include selecting the highest thickness reduction speed information from the at least one thickness reduction speed information; Setting thickness reduction proportional speed information by converting the thickness reduction speed information based on the maximum thickness reduction speed information; And setting the pipe running training information by using the nuclear power generation running training information and the thickness reduction proportional speed information.

Here, the setting of the pipe operation training information using the nuclear power generation operation training information and the thickness reduction proportional speed information may be performed by multiplying the nuclear power generation operation training information and the thickness reduction proportional speed information to perform the pipe operation training. This is a step of setting information.

The step (c) may include extracting pipe initial thickness information from the operation data; Generating average proportional speed information by calculating an average of the thickness reduction proportional speed information corresponding to each of the at least one pipe; And setting the pipe prediction thickness information by using the average proportional speed information, the pipe running years information, and the pipe initial thickness information.

On the other hand, step (d) comprises the steps of: calculating a standard deviation using the pipe prediction thickness information and the pipe measurement thickness information corresponding to each of the at least one pipe to generate a thickness standard deviation value; And generating a deceleration speed standard deviation value by calculating a standard deviation of the thickness deceleration speed information for the at least one pipe.

The step (d) may include extracting pipe allowable thickness information from the operation data; And setting the remaining life information by using the average proportional speed information, the pipe measurement thickness information, the pipe initial thickness information, and the pipe allowable thickness information.

The step (d) may include generating pipe setting thickness information using the pipe measurement thickness information and the predicted thickness standard deviation value; And setting residual life information using the average proportional speed information, the pipe setting thickness information, the pipe initial thickness information, and the pipe allowable thickness information.

On the other hand, step (d) comprises the steps of: generating deceleration setting speed information using the average proportional speed information and the deceleration speed standard deviation value; And setting the remaining life information using the deceleration setting speed information, the pipe setting thickness information, the pipe initial thickness information, and the pipe allowable thickness information.

Pipe inspection system and pipe inspection method according to an embodiment of the present invention can determine the thickness reduction of the pipe connecting the nuclear fuel channel and the header of the nuclear power plant.

In addition, the pipe inspection system and the pipe inspection method according to an embodiment of the present invention can analyze the trend of the thickness reduction for each of the plurality of pipes included in the heavy water reactor nuclear power plant can prevent the failure of the pipe.

And, the pipe inspection system and pipe inspection method according to an embodiment of the present invention can determine the remaining life and inspection cycle for each of the plurality of pipes can improve the reliability of the facility.

1 is a block diagram showing a pipe inspection system according to an embodiment of the present invention.
Figure 2 is a block diagram showing in detail the pipe thickness processing unit of the pipe inspection system according to an embodiment of the present invention.
3 is a flow chart briefly showing a pipe inspection method according to an embodiment of the present invention.
4 and 5 is a flow chart showing in detail the pipe inspection method according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating a relationship between piping operation number information and piping measurement thickness information according to an exemplary embodiment of the present invention. FIG.
7 is a diagram for explaining setting of remaining life information according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Hereinafter, an embodiment of a pipe inspection system and a pipe inspection method according to the present invention will be described in detail with reference to the accompanying drawings. In the following description with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals. Duplicate description thereof will be omitted.

The pipe inspection system according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

1 is a block diagram showing a pipe inspection system according to an embodiment of the present invention.

Referring to FIG. 1, the pipe inspection system 100 includes an input unit 150, a communication unit 170, a pipe thickness processing unit 200, and a life determination unit 310 to predict the thickness of a pipe and predict the remaining life of the pipe. And a display unit 330 and a storage unit 350. In this case, the pipe may be a pipe connecting the nuclear fuel channel and the header of the nuclear power plant, also referred to as a feeder (feeder).

The input unit 150 receives driving data from a user. In this case, when the user displays a user interface (UI) for requesting driving data on the display unit 330, the user may input driving data through the input unit 150. Here, the operation data includes nuclear power generation service information indicating the number of years of operation of nuclear power generation, pipe identification information, pipe installation position, pipe nominal size, and mass flow rate information for each of at least one pipe included in the nuclear power plant. At least one of linear flow velocity information, pipe allowable thickness information, and pipe initial thickness information. At this time, the pipe identification information is information that can identify the pipe, such as the identification name and identification number of the pipe, pipe allowable thickness information indicates the minimum thickness of the pipe when the pipe is no longer available, pipe initial thickness information is It is the thickness of the pipes before running nuclear power generation (ie, the thickness of the pipes with the factory manufactured). The mass flow rate information indicates the mass flow rate of the coolant flowing through the pipe, and the linear flow rate information indicates the linear flow rate of the coolant flowing through the pipe.

In addition, the input unit 150 may receive data necessary for inspecting the pipe. Such an input unit 150 is a user interface for receiving various data from a user, and the implementation thereof is not particularly limited. For example, the input unit 150 may be any means for receiving data such as a keyboard, a touch-pad, a mouse, and a key-pad.

The communication unit 170 is connected to a measuring device for measuring the thickness of the pipe. The communication unit 170 receives measurement data from a measurement device (not shown) using a wireless communication method or a wired communication method. In this case, the measurement data includes pipe measurement thickness information matching the pipe identification information for each of the at least one pipe included in the nuclear power plant. Here, pipe | tube measurement thickness information shows the value which measured the thickness of the pipe | tube during atomic power generation. In this case, the pipe measurement thickness information may indicate the minimum thickness of the pipe.

Herein, the driving data input from the user through the input unit 150 has been described as an example. However, the present invention is not limited thereto. Driving data may be provided. In addition, receiving measurement data through the measurement device is not limited, for example, and may receive measurement data from an external storage device through the communication unit 170.

The pipe thickness processor 200 sets the thickness reduction speed information and the pipe operation number of years using the operation data. That is, the pipe thickness processing unit 200 sets the thickness reduction speed information using the mass flow rate information and the linear flow rate information included in the operation data, and uses the nuclear power generation operation training information and the thickness reduction speed information included in the operation data. Set piping operation number information. Here, the pipe running number information indicates the number of years that the pipe has been operated substantially in accordance with the thickness reduction speed information. The pipe thickness processor 200 generates pipe prediction thickness information by using the thickness reduction speed information and the pipe operation number of years. Here, the pipe prediction thickness information is a value predicted and displayed based on the thickness deceleration speed information and the pipe running service information. Such a pipe thickness processing unit 200 will be described in more detail with reference to FIG. 2.

The life determination unit 310 sets residual life information using the thickness reduction speed information, the pipe measurement thickness information, and the pipe prediction thickness information. In detail, the life determination unit 310 generates pipe setting thickness information by using pipe measurement thickness information and a standard thickness deviation value. The life determination unit 310 generates pipe setting thickness information using the pipe measurement thickness information and the thickness standard deviation value. The life determination unit 310 generates the deceleration setting speed information by using the thickness deceleration speed information and the deceleration speed standard deviation value. The life determination unit 310 sets the remaining life information using the deceleration setting speed information, the pipe setting thickness information, and the pipe allowable thickness information. In this case, the remaining life information indicates the number of years that the pipe can be used.

The display unit 330 may display a process and a result performed by the input unit 150, the communication unit 170, the pipe thickness processing unit 200, the life determination unit 310, and the storage unit 350. For example, the display unit 330 may display driving data received through the input unit 150 and measurement data received through the communication unit 170. The display unit 330 may display a process and a result of setting the thickness reduction speed information, the pipe running number information, and the pipe prediction thickness information in the pipe thickness processor 200. The display unit 330 may display a process and a result of generating the pipe setting thickness information and the deceleration setting speed information by the life determination unit 310. The display unit 330 may display a process and a result of setting the remaining life information in the life determination unit 310.

The display unit 330 may display an error occurrence item when an error occurs in the communication unit 170, the pipe thickness processing unit 200, the life determination unit 310, and the storage unit 350. Accordingly, the user may check the error occurrences displayed through the display unit 330 and replace the error occurrence.

In this case, the display unit 330 may include a cathode ray tube, a liquid crystal display (LCD), an organic light emitting display (OLED), an electrophoretic display (EPD), and a plasma display panel (Plasma). It may be a display device for displaying a display panel (PDP) or the like, or may be a computer including a display device. In addition, the display unit 330 may be integrated with the input unit 150 that receives data from a user using a touch screen.

The storage unit 350 estimates the thickness of the pipe and stores data necessary or generated in order to determine the remaining life. That is, the storage 350 stores data necessary and generated data by the input unit 150, the communication unit 170, the pipe thickness processing unit 200, and the life determination unit 310. For example, the storage 350 may store driving data received through the input unit 150 and measurement data received through the communication unit 170. The storage 350 may store the thickness reduction speed information, the pipe running number information, and the pipe prediction thickness information set by the pipe thickness processor 200. The storage unit 350 may store the pipe setting thickness information and the deceleration setting speed information generated by the life determination unit 310. The storage unit 350 may store the remaining life information set by the life determination unit 310.

The storage unit 350 provides necessary data according to a request of the input unit 150, the communication unit 170, the pipe thickness processing unit 200, the life determination unit 310, and the display unit 330. The storage unit 350 may be formed of an integrated memory or divided into a plurality of memories. For example, the storage 350 may include a read only memory (ROM), a random access memory (RAM), a flash memory, or the like.

Figure 2 is a block diagram showing in detail the pipe thickness processing unit of the pipe inspection system according to an embodiment of the present invention.

Referring to FIG. 2, the pipe thickness processor 200 includes an extractor 220, a setter 240, a predictor 260, and a calculator 280.

The extraction unit 220 extracts data necessary for estimating the thickness of the pipe from the operation data. In other words, the extraction unit 220 extracts the nuclear power generation operation training information from the operation data received through the input unit 150. The extraction unit 220 extracts pipe identification information, mass flow rate information, linear flow rate information, pipe process size, pipe initial thickness information, and pipe allowable thickness information from the operation data. At this time, the extraction unit 220 extracts mass flow rate information, linear flow rate information, piping process size, piping initial thickness information, and pipe allowable thickness information for each of the plurality of pipes included in the nuclear power plant from the operation data. For example, if the nuclear power plant includes 380 piping, the extraction unit 220, the mass flow rate information, linear flow rate information, piping process size, piping initial thickness information and piping allowance for each of the 380 piping in the operation data Thickness information can be extracted.

In addition, the extraction unit 220 extracts pipe identification information and pipe measurement thickness information regarding each of the plurality of pipes from the measurement data received through the communication unit 170 from the measurement device.

The setting unit 240 sets the thickness deceleration speed information by using the mass flow rate information and the linear flow rate information, and sets the pipe operation training year information by using the nuclear power plant running training information and the thickness deceleration speed information. Specifically, the setting unit 240 sets the thickness reduction speed information by using the mass flow rate information and the linear flow rate information for each of the plurality of pipes. The setting unit 240 selects a pipe having the same pipe pupil size from the plurality of pipe pupil sizes to set a pipe group. For example, since the pupil size of the pipe located adjacent to the reactor outlet where the corrosion of the pipe is much corroded is 2 inches and 2.5 inches, the setting unit 240 is a pipe group having a pipe pupil size of 2 inches and a pipe group having 2.5 inches. Can be set.

The setting unit 240 selects the maximum thickness reduction speed information from the plurality of thickness reduction speed information for each pipe group, converts the thickness reduction speed information corresponding to the pipe included in the pipe group based on the maximum thickness reduction speed information, and the thickness. Deceleration Proportional speed information is set. The setting unit 240 sets the pipe running training information by using the thickness reduction proportional speed information and the nuclear power plant running training information.

The predictor 260 sets pipe prediction thickness information by using pipe operation number information. In other words, the predictor 260 generates average proportional speed information by calculating an average of the plurality of thickness reduction proportional speed information. The prediction unit 260 sets pipe prediction thickness information by using the average proportional speed information, pipe operation number information set by the setting unit 240, and pipe initial thickness information extracted by the extraction unit 220.

The calculation unit 280 generates a thickness standard deviation value for the pipe prediction thickness information and the pipe measurement thickness information, and generates a deceleration speed standard deviation value for the thickness reduction speed information. In detail, the calculator 280 generates an error between pipe prediction thickness information and pipe measurement thickness information corresponding to pipe identification information with respect to each of the pipes. The calculation unit 280 calculates a standard deviation with respect to the generated error to generate a thickness standard deviation value. The calculation unit 280 calculates standard deviations for the plurality of thickness reduction speed information to generate a reduction speed standard deviation value.

A method for inspecting a pipe according to an embodiment of the present invention will be described with reference to FIGS. 3 to 7.

3 is a flow chart briefly showing a pipe inspection method according to an embodiment of the present invention.

Referring to FIG. 3, the pipe inspection system 100 receives operation data and measurement data (S320). That is, the pipe inspection system 100 receives operation data from the user through the input unit 150 and receives measurement data from the measurement device through the communication unit 170.

The pipe inspection system 100 sets thickness reduction speed information and pipe operation number of years information (S340). That is, the pipe inspection system 100 sets the thickness reduction speed information by using the mass flow rate information and the linear flow rate information included in the operation data. The pipe inspection system 100 sets pipe operation number information using the nuclear power generation operation number information included in the thickness reduction speed information and the operation data.

The pipe inspection system 100 generates pipe prediction thickness information (S360). In other words, the pipe inspection system 100 generates pipe prediction thickness information by using the thickness reduction speed information and the pipe operation number of years. Here, the pipe prediction thickness information indicates the thickness of the pipe which predicts that the pipe thickness becomes thin as the nuclear power generation operates.

Pipe inspection system 100 sets the remaining life information (S380). That is, the pipe inspection system 100 sets residual life information by using pipe measurement thickness information, pipe prediction thickness information, thickness reduction speed information, pipe initial thickness information, and pipe allowable thickness information.

4 and 5 is a flow chart showing in detail the pipe inspection method according to an embodiment of the present invention.

4 and 5, the pipe inspection system 100 receives operation data and measurement data (S411). Specifically, the input unit 150 of the pipe inspection system 100 receives the operation data from the user. At this time, the operation data is necessary data for estimating the thickness of the pipe and predicting the remaining life of the pipe, the nuclear power generation service information, pipe identification information for each of the plurality of pipes, pipe installation location, pipe nominal size, mass flow rate information, It may include at least one of linear flow rate information, pipe allowable thickness information, and pipe initial thickness information.

The communication unit 170 receives measurement data from the measurement device. Here, the measuring device is a device for measuring the thickness of the pipe during the operation of nuclear power generation, measuring the thickness of the pipe to generate pipe measurement thickness information. The measuring device generates measurement data by matching pipe measurement thickness information with pipe identification information.

The pipe inspection system 100 extracts nuclear power plant running water information, mass flow rate information, and linear flow rate information from the operation data (S413). That is, the extraction unit 220 of the pipe inspection system 100 extracts nuclear power generation operation training information indicating the number of years the nuclear power plant has operated from the operation data received through the input unit 150. The extractor 220 extracts pipe identification information, mass flow rate information, linear flow rate information, and pipe pupil size corresponding to each of the plurality of pipes included in the nuclear power plant from the operation data.

The pipe inspection system 100 sets thickness reduction speed information using the operation data (S415). In other words, the setting unit 240 of the pipe inspection system 100 sets the thickness reduction speed information using the mass flow rate information and the linear flow rate information for each of the plurality of pipes. That is, the setting unit 240 multiplies the mass flow rate information and the linear flow rate information for each of the plurality of pipes to set the thickness reduction speed information. The setting unit 240 may define the thickness reduction speed information as shown in [Equation 1].

[Equation 1]

D = Q * V

Where D is thickness deceleration velocity information, Q is mass flow velocity information, and V is linear flow velocity information. At this time, the setting unit 240 substitutes the mass flow rate information extracted by the extracting unit 220 to Q of Equation 1, and substitutes the linear flow rate information extracted by the extracting unit 220 into V, thereby reducing the thickness deceleration rate D. You can set the information.

The pipe inspection system 100 selects the highest thickness reduction speed information among the thickness reduction speed information (S417). In detail, the setting unit 240 of the pipe inspection system 100 selects a pipe having the same pipe pupil size from a pipe pupil size for a plurality of pipes to set a pipe group. The setting unit 240 selects the pipe deceleration speed having the largest thickness deceleration speed information from the pipe deceleration speed corresponding to the plurality of pipe pupil sizes for each pipe group and sets the pipe deceleration speed as the maximum pipe deceleration speed.

The pipe inspection system 100 sets thickness reduction proportional speed information using the maximum thickness reduction speed information and the thickness reduction speed information (S419). In other words, the setting unit 240 of the pipe inspection system 100 converts the plurality of thickness reduction speed information included in the pipe group based on the maximum thickness reduction speed information corresponding to each of the plurality of pipe groups, thereby reducing the thickness reduction proportional speed. Set the information. That is, the setting unit 240 may define the thickness reduction proportional speed information as shown in [Equation 2].

&Quot; (2) "

B: 1 = D: P

Here, B is the maximum thickness reduction speed information, x is the thickness reduction speed information, P is the thickness reduction proportional speed information. Accordingly, the setting unit 240 may set the thickness reduction proportional speed information of P by substituting the set maximum pipe deceleration speed into B of [Equation 2] and substituting thickness deceleration speed information into D.

The pipe inspection system 100 sets pipe operation training information using the nuclear power generation operation training information (S421). Specifically, the setting unit 240 of the pipe inspection system 100 sets the pipe operation training information using the thickness reduction speed information and the nuclear power generation operation training information. That is, the setting unit 240 multiplies the thickness reduction speed information and the nuclear power plant running service information to set the pipe running train information. The setting unit 240 may define the pipe operation training information as shown in [Equation 3].

&Quot; (3) "

S = E * P

Here, S is pipe operation training information, E is nuclear power operation training information, and P is thickness reduction proportional speed information. Therefore, the setting unit 240 substitutes the nuclear power generation operation training information extracted from the operation data into E of [Equation 3], and substitutes the thickness reduction proportional speed information set in P to supply pipe operation training information corresponding to S. Can be set.

The pipe inspection system 100 extracts pipe initial thickness information from the operation data (S423). That is, the extraction unit 220 of the pipe inspection system 100 extracts pipe initial thickness information corresponding to a plurality of pipes in order to predict the pipe thickness from the operation data.

The pipe inspection system 100 sets pipe prediction thickness information by using pipe operation number information and pipe initial thickness information (S425). In detail, the predicting unit 260 of the pipe inspection system 100 generates average proportional speed information by calculating an average of the thickness reduction proportional speed information of the number of drums. The prediction unit 260 sets pipe prediction thickness information by using average proportional speed information, pipe running number information, and pipe initial thickness information. That is, the prediction unit 260 may define the pipe prediction thickness information as shown in [Equation 4].

&Quot; (4) "

y = a * x + b

Here, y is pipe prediction thickness information, a is average proportional speed information, x is pipe running years information, and b is pipe initial thickness information. Therefore, the predicting unit 260 substitutes the average proportional speed information into a of Equation 4, substitutes piping operation number information set by the setting unit 240 into x, and extracts 220 into b. The pipe prediction thickness information corresponding to y may be set by substituting the extracted pipe initial thickness information.

The reason why the pipe prediction thickness information can be defined using Equation 4 is that the predictor 260 can perform linear regression analysis of the pipe measurement thickness information and the pipe operation number of years. For example, the predictor 260 may display pipe measurement thickness information of a pipe group that is 2.5 inches as shown by reference numeral 115 of FIG. 6. At this time, the X-axis is the pipe running years information, the Y-axis represents the pipe thickness. Therefore, the predicting unit 260 may determine that the thickness of the pipe is reduced according to the pipe running number information. Accordingly, the prediction unit 260 may generate Equation 4 to set pipe prediction thickness information by linearly regressing the pipe measurement thickness information and the pipe operation number of years. For example, the prediction unit 260 may generate pipe prediction thickness information of a pipe group that is 2.5 inches by using reference numeral 117 shown in FIG. 6.

The pipe inspection system 100 generates a thickness standard deviation value and a deceleration speed standard deviation value (S427). In other words, the calculation unit 280 of the pipe inspection system 100 generates an error between pipe prediction thickness information and pipe measurement thickness information corresponding to pipe identification information of each of the plurality of pipes. The calculation unit 280 calculates a standard deviation of the errors of the plurality of pipe prediction thickness information and the pipe measurement thickness information to generate a thickness standard deviation value. That is, the calculator 280 may define the thickness standard deviation value as shown in [Equation 5].

[Equation 5]

Where σ is the thickness standard deviation value, M is the pipe measurement thickness information, a is the average proportional velocity information, x is the pipe running service information, b is the pipe initial thickness information, and n is the number of pipe measurement thickness information. to be. In this case, ax + b represents pipe prediction thickness information. Therefore, the calculation unit 280 substitutes the pipe measurement thickness information extracted into the measurement data into M of [Equation 5], substitutes the pipe prediction thickness information set by the prediction unit 260 into ax + b, and measures the pipe into n. The thickness standard deviation value corresponding to σ is generated by substituting the number of thickness information (that is, the number of pipe prediction thickness information).

The calculation unit 280 calculates a standard deviation with respect to the thickness reduction speed information corresponding to the plurality of pipes, and generates a reduction speed standard deviation value. On the other hand, the calculation unit 280 may define the deceleration speed standard deviation value using [Equation 5] as shown in [Equation 6].

&Quot; (6) "

Here, sigma _a is a deceleration speed standard deviation value, sigma is a thickness standard deviation value, x is pipe running service information, and n is the number of pipe measurement thickness information used when calculating a thickness standard deviation value. Therefore, the calculation unit 280 substitutes the thickness standard deviation value into σ of [Equation 6], substitutes piping operation number information into x, and calculates the number of pipe measurement thickness information used when calculating the thickness standard deviation value into n. By substituting, a deceleration speed standard deviation value corresponding to σ _a can be generated.

The extraction unit 220 of the pipe inspection system 100 extracts pipe allowable thickness information corresponding to the plurality of pipes from the operation data (S429). Here, the pipe allowable thickness information indicates the minimum thickness of the pipe that may cause a problem in the pipe.

The pipe inspection system 100 generates the pipe setting thickness information by reflecting an error in the pipe measurement thickness information (S431). In other words, the life determination unit 310 of the pipe inspection system 100 sets a set constant corresponding to the lower limit application value using the standard normal distribution function, assuming that the thickness standard deviation value is a normal distribution. Here, the lower limit application value is a value set to apply the lower limit of the distribution of the pipe thickness measurement information, the user inputs the input unit 150 to set in the life determination unit 310 or a predetermined algorithm (for example, a program And the likelihood model) may be set by the life determination unit 310. The life determination unit 310 generates pipe setting thickness information using the pipe measurement thickness information and the thickness standard deviation value. That is, the life determination unit 310 generates pipe setting thickness information by subtracting a value obtained by multiplying the set constant and the thickness standard deviation value from the pipe measurement thickness information.

The pipe inspection system 100 generates the deceleration setting speed information by reflecting an error in the thickness deceleration speed information (S433). Specifically, the life determination unit 310 of the pipe inspection system 100 sets a set constant corresponding to the lower limit application value using the standard normal distribution function, assuming that the deceleration speed standard deviation value is a normal distribution. The life determination unit 310 generates the deceleration setting speed information by using the average proportional speed information and the deceleration speed standard deviation value. That is, the life determination unit 310 generates the deceleration setting speed information by subtracting a value obtained by multiplying the set constant and the deceleration speed standard deviation value from the average proportional speed information.

The pipe inspection system 100 sets residual life information by using pipe allowable thickness information, thickness reduction speed information, pipe measurement thickness information, and pipe prediction thickness information (S435). In other words, the life determination unit 310 of the pipe inspection system 100 sets the remaining life information using the deceleration setting speed information, the pipe setting thickness information, the pipe initial thickness information, and the pipe allowable thickness information. That is, the life determination unit 310 substitutes pipe setting thickness information into y in [Equation 4], substitutes deceleration setting speed information into a, substitutes initial pipe thickness information into b, and x denotes pipe allowable thickness information. Calculate when it is equal to and determine the remaining life of the pipe and set the remaining life information.

7 is a diagram for explaining setting of remaining life information according to an embodiment of the present invention.

The pipe inspection system 100 may be represented by reference numeral 121 when graphing [Equation 4] as shown in FIG. 7. At this time, the axis is the pipe running number of information, the Y axis represents the pipe thickness, reference numeral 119 represents the pipe allowable thickness information. In addition, the life determination unit 310 may be represented as shown by reference numeral 125 when the measurement data 123 is substituted into [Equation 4]. That is, the life determination unit 310 may set the point 127 where the reference numeral 125 and the pipe allowable thickness information meet as the remaining life information.

In addition, the life determination unit 310 may be represented as shown by reference numeral 131 when the pipe setting thickness information is substituted into y in [Equation 4]. That is, the life determination unit 310 may set the point 133 where the reference numeral 131 and the pipe allowable thickness information meet as the remaining life information.

Then, the life determination unit 310 can be represented as shown in reference numeral 135 by substituting the pipe setting thickness information to y in [Equation 4] and the deceleration setting speed information to a. That is, the life determination unit 310 may set the point where the reference numeral 135 and the pipe allowable thickness information meet as the remaining life information.

Pipe inspection method according to an embodiment of the present invention is implemented in the form of program instructions that can be executed by various computer means may be recorded on a computer readable medium. Computer-readable media may include, alone or in combination with the program instructions, data files, data structures, and the like.

The program instructions recorded on the computer readable medium may be those specially designed and constructed for the present invention, or may be known and available to those skilled in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic media such as floppy disks. Hardware systems specifically configured to store and execute optical-optical media and program instructions such as ROM, RAM, flash memory, and the like, are included. In addition, the above-described medium may be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, and the like. Examples of program instructions may include machine language code such as those generated by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like.

The hardware system described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

100: piping inspection system
200: pipe thickness processing unit
220: extraction unit
240: setting unit
260: prediction unit
280: calculation unit
310: life determination unit
330: display unit
350: storage unit

Claims (21)

In a pipe inspection system for inspecting pipes,
An extraction unit for extracting nuclear power generation operation number information, mass flow rate information and linear flow rate information corresponding to each of the at least one pipe from the operation data, and the mass flow rate information and the linear flow rate information corresponding to each of the at least one pipe; A pipe thickness processor including a setting unit configured to set thickness reduction speed information using the nuclear power generation operation number information and the pipe operation number information using the thickness reduction speed information; And
And a life determination unit configured to set residual life information using the thickness reduction speed information, pipe measurement thickness information, and pipe prediction thickness information.
delete The method of claim 1,
The setting unit,
Selecting the maximum thickness reduction speed information from the at least one thickness reduction speed information, converting the thickness reduction speed information based on the maximum thickness reduction speed information, setting thickness reduction proportional speed information, and operating the nuclear power generation operation training information; And setting the pipe operation number of years using the thickness reduction proportional speed information.
The method of claim 3, wherein
The pipe thickness processing unit,
Generating average proportional speed information by calculating an average of at least one thickness reduction proportional speed information, and setting the pipe prediction thickness information by using the average proportional speed information, the pipe operation number of years, and the initial pipe thickness information; Piping inspection system further comprises a prediction unit.
The method of claim 1,
The pipe thickness processing unit,
A standard deviation is calculated by calculating a standard deviation using the pipe prediction thickness information corresponding to each of the at least one pipe and the pipe measurement thickness information, and the thickness deceleration corresponding to the at least one pipe is generated. And a calculating unit configured to calculate a standard deviation value of the deceleration speed by calculating a standard deviation with respect to the speed information.
6. The method of claim 5,
The life determination unit,
And the remaining life information is set using the thickness reduction speed information, the pipe measurement thickness information, and the pipe allowable thickness information included in the operation data.
The method according to claim 6,
The life determination unit,
Generating pipe setting thickness information using the pipe measurement thickness information and the thickness standard deviation value, and setting the remaining life information using the thickness reduction speed information, the pipe setting thickness information, and the pipe allowable thickness information. Piping inspection system characterized by.
8. The method of claim 7,
The life determination unit,
Generating deceleration setting speed information using the thickness reduction speed information and the deceleration speed standard deviation value, and setting the residual life information using the deceleration setting speed information, the pipe setting thickness information, and the pipe allowable thickness information Piping inspection system, characterized in that.
In a pipe inspection method in which a pipe inspection system inspects a pipe,
(a) receiving operation data and measurement data;
(b) extracting nuclear power generation service number information, mass flow rate information and linear flow rate information corresponding to each of the at least one pipe from the operation data; and the mass flow rate information and the linear flow rate corresponding to each of the at least one pipe. The thickness reduction speed information is set using flow rate information, and the pipe operation training time information is set using the nuclear power plant operation training information and the thickness reduction speed information. Setting thickness reduction speed information and piping operation number information for the pipe;
(c) generating pipe prediction thickness information by using the thickness reduction speed information and the pipe operation years information; And
and (d) setting residual life information using the thickness reduction speed information, the pipe measurement thickness information included in the measurement data, and the pipe prediction thickness information.
delete The method of claim 9,
The step (b)
Selecting maximum thickness reduction speed information from at least one thickness reduction speed information;
Setting thickness reduction proportional speed information by converting the thickness reduction speed information based on the maximum thickness reduction speed information; And
And setting the pipe running training information by using nuclear power generation running training information and the thickness reduction proportional speed information.
12. The method of claim 11,
The setting of the pipe operation training information using the nuclear power generation operation training information and the thickness reduction proportional speed information may include:
And calculating the pipe operation number of years by multiplying the nuclear power generation operation number information and the thickness reduction proportional speed information.
12. The method of claim 11,
The step (c)
Extracting pipe initial thickness information from the operation data;
Generating average proportional speed information by calculating an average of the thickness reduction proportional speed information corresponding to each of the at least one pipe; And
And setting the pipe prediction thickness information by using the average proportional speed information, the pipe running years information, and the pipe initial thickness information.
The method of claim 13,
In the step (c)
The pipe prediction thickness information is set by the following equation (1) pipe inspection method.

Here, Equation 1 is
y = a * x + b
ego,
Wherein y is pipe prediction thickness information, a is average proportional speed information, x is pipe running service information, and b is pipe initial thickness information.
The method of claim 13,
The step (d)
Generating a thickness standard deviation value by calculating a standard deviation using the pipe prediction thickness information and the pipe measurement thickness information corresponding to each of the at least one pipe; And
And calculating a standard deviation value of the thickness reduction speed information for the at least one pipe to generate a speed reduction standard deviation value.
16. The method of claim 15,
Generating a standard deviation value by calculating a standard deviation using the pipe prediction thickness information and the pipe measurement thickness information corresponding to each of the at least one pipe;
The thickness standard deviation value is a pipe inspection method, characterized in that set by the following equation (2).

Here, Equation 2 is

ego,
Σ is a thickness standard deviation value, M is pipe measurement thickness information, a is average proportional speed information, x is pipe running service information, b is pipe initial thickness information, and n is pipe measurement Number of thickness information.
16. The method of claim 15,
Calculating a standard deviation value of the thickness reduction speed information for the at least one pipe to generate a speed reduction standard deviation value;
The deceleration speed standard deviation value is set by the following equation (3).

Here, Equation 3 is

ego,
Σ _a is a deceleration speed standard deviation value, σ is a thickness standard deviation value, x is pipe running years information, and n is the number of pipe measurement thickness information used when calculating the thickness standard deviation value.
16. The method of claim 15,
The step (d)
Extracting pipe allowance thickness information from the operation data; And
And setting the remaining life information by using the average proportional speed information, the pipe measurement thickness information, the pipe initial thickness information, and the pipe allowable thickness information.
19. The method of claim 18,
The step (d)
Generating pipe setting thickness information using the pipe measurement thickness information and the predicted thickness standard deviation value; And
And setting remaining life information using the average proportional speed information, the pipe setting thickness information, the pipe initial thickness information, and the pipe allowable thickness information.
20. The method of claim 19,
The step (d)
Generating deceleration set speed information using the average proportional speed information and the deceleration speed standard deviation value; And
And setting the remaining life information using the deceleration setting speed information, the pipe setting thickness information, the pipe initial thickness information, and the pipe allowable thickness information.
delete

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