Method, device, equipment and medium for determining defect position of pressurizer in nuclear power plant

Abstract

The present invention relates to the technical field of nuclear power plant maintenance optimization, and particularly to a method, device, computer device and storage medium for determining the defect position of a nuclear power plant pressurizer. The method includes receiving a detection instruction for defect detection of a nuclear power plant pressurizer; the nuclear power plant pressurizer includes a pressurizer shell and at least one branch pipe; a curved surface is provided on the pressurizer shell, and the branch pipe is arranged on the curved surface and connected to the curved surface through a pressurizer weld; determining a defect scanning device and defect scanning parameters for defect detection of the nuclear power plant pressurizer according to the weld parameters and the pressurizer parameters; causing the defect scanning device to perform phased array ultrasonic defect detection from the outside of the pressurizer weld according to the defect scanning parameters to generate a defect detection waveform; and determining defect position information corresponding to the pressurizer weld according to the defect detection waveform and the obtained preset detection map. The present invention improves the defect detection efficiency, accuracy and safety.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power plant maintenance optimization, and particularly to a method, device, equipment and medium for determining the defect position of a nuclear power plant pressurizer. Background Art

[0002] With the development of science and technology, there are many large-scale devices inside a nuclear power plant, such as the core measurement system of a nuclear power plant pressurized water reactor, a nuclear power plant pressurizer, etc. Regular inspections need to be carried out on these large-scale devices. For example, defect detection needs to be carried out on the pressurizer welds of a nuclear power plant pressurizer to ensure the safety of the nuclear power plant during the voltage stabilization operation process.

[0003] In the prior art, generally, a radiation source is used to emit rays for defect detection of the pressurizer welds. However, the method of using a radiation source to emit rays for defect detection has the following deficiencies: the pipe wall where the pressurizer welds are located is very thick, and the radiation source penetration focal length is large, resulting in a low defect detection accuracy rate of the pressurizer welds; and due to the particularity of the position and structure of the pressurizer welds, the position of the radiation source and the radiation beam need to be continuously adjusted to barely carry out defect detection, resulting in a low defect detection efficiency of the pressurizer welds. Summary of the Invention

[0004] Embodiments of the present invention provide a method, device, equipment and medium for determining the defect position of a nuclear power plant pressurizer to solve the problems of low defect detection accuracy rate and low efficiency of the pressurizer welds.

[0005] A method for determining the defect position of a nuclear power plant pressurizer includes:

[0006] Receiving a detection instruction for defect detection of a nuclear power plant pressurizer; the nuclear power plant pressurizer includes a pressurizer shell and at least one branch pipe; a curved surface is provided on the pressurizer shell, and the branch pipe is arranged on the curved surface and is connected to the curved surface through a pressurizer weld; the detection instruction includes the pressurizer parameters and the weld parameters corresponding to the pressurizer weld;

[0007] Determining a defect scanning device for defect detection of the nuclear power plant pressurizer and the defect scanning parameters of the defect scanning device according to the weld parameters and the pressurizer parameters;

[0008] Making the defect scanning device perform phased array ultrasonic defect detection from the outside of the pressurizer weld according to the defect scanning parameters to generate a defect detection waveform;

[0009] Obtaining a preset detection map, and determining the defect position information corresponding to the pressurizer weld according to the preset detection map and the defect detection waveform.

[0010] A device for determining the defect position of a pressurizer in a nuclear power plant, comprising:

[0011] A detection instruction receiving module, configured to receive a detection instruction for defect detection of a pressurizer in a nuclear power plant; the pressurizer in the nuclear power plant includes a pressurizer housing and at least one branch pipe; a curved surface is provided on the pressurizer housing, and the branch pipe is arranged on the curved surface and is connected to the curved surface through a pressurizer weld; the detection instruction includes the pressurizer parameters and weld parameters corresponding to the pressurizer weld;

[0012] A defect scanning device selection module, configured to determine a defect scanning device for defect detection of the pressurizer in the nuclear power plant and the defect scanning parameters of the defect scanning device according to the weld parameters and the pressurizer parameters;

[0013] An ultrasonic defect detection module, configured to enable the defect scanning device to perform phased array ultrasonic defect detection from the outside of the pressurizer weld according to the defect scanning parameters to generate a defect detection waveform;

[0014] A defect position information determination module, configured to obtain a preset detection map and determine defect position information corresponding to the pressurizer weld according to the preset detection map and the defect detection waveform.

[0015] A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the above-mentioned method for determining the defect position of a pressurizer in a nuclear power plant is implemented.

[0016] A computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the above-mentioned method for determining the defect position of a pressurizer in a nuclear power plant is implemented.

[0017] The above-mentioned method, device, computer device and storage medium for determining the defect position of a pressurizer in a nuclear power plant, the method includes receiving a detection instruction for defect detection of a pressurizer in a nuclear power plant; the pressurizer in the nuclear power plant includes a pressurizer housing and at least one branch pipe; a curved surface is provided on the pressurizer housing, and the branch pipe is arranged on the curved surface and is connected to the curved surface through a pressurizer weld; the detection instruction includes the pressurizer parameters and weld parameters corresponding to the pressurizer weld; determining a defect scanning device for defect detection of the pressurizer in the nuclear power plant and the defect scanning parameters of the defect scanning device according to the weld parameters and the pressurizer parameters; enabling the defect scanning device to perform phased array ultrasonic defect detection from the outside of the pressurizer weld according to the defect scanning parameters to generate a defect detection waveform; obtaining a preset detection map and determining defect position information corresponding to the pressurizer weld according to the preset detection map and the defect detection waveform.

[0018] The present invention selects a defect scanning device matching the weld seam of different voltage regulators for phased array ultrasonic defect detection, which can improve the defect detection efficiency and accuracy; and in this embodiment, the phased array ultrasonic defect detection is performed from the outside of the voltage regulator weld seam, so as to avoid the risk of the defect scanning device falling into the nuclear power plant voltage regulator, and improve the safety of defect detection and the service life of the nuclear power plant voltage regulator. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 is a schematic diagram of an application environment of a method for determining the defect position of a nuclear power plant voltage regulator in an embodiment of the present invention;

[0021] Figure 2 is a flowchart of a method for determining the defect position of a nuclear power plant voltage regulator in an embodiment of the present invention;

[0022] Figure 3 is a principle block diagram of a device for determining the defect position of a nuclear power plant voltage regulator in an embodiment of the present invention;

[0023] Figure 4 is a schematic diagram of a computer device in an embodiment of the present invention. Detailed Embodiments

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0025] The method for determining the defect position of a nuclear power plant voltage regulator provided by the embodiment of the present invention can be applied to the application environment as Figure 1 shown. Specifically, the method for determining the defect position of a nuclear power plant voltage regulator is applied to a system for determining the defect position of a nuclear power plant voltage regulator, and the system for determining the defect position of a nuclear power plant voltage regulator includes as Figure 1The client and server shown communicate with each other over a network, and are used to solve the problems of low defect detection accuracy and low efficiency in the welds of the pressure stabilizer. Among them, the client, also known as the user side, refers to a program that provides local services for clients corresponding to the server. The client can be installed on, but not limited to, various personal computers, laptops, smartphones, tablets, and portable wearable devices. The server can be implemented by an independent server or a server cluster composed of multiple servers.

[0026] In one embodiment, as Figure 2 shown, a method for determining the defect location of a nuclear power plant pressure stabilizer is provided. Taking the method applied to the Figure 1 server in it as an example for illustration, the method includes the following steps:

[0027] S10: Receive a detection instruction for defect detection of the nuclear power plant pressure stabilizer; the nuclear power plant pressure stabilizer includes a pressure stabilizer housing and at least one branch pipe; a curved surface is provided on the pressure stabilizer housing, and the branch pipe is arranged on the curved surface and is connected to the curved surface through a pressure stabilizer weld; the detection instruction contains the pressure stabilizer parameters and the weld parameters corresponding to the pressure stabilizer weld.

[0028] It can be understood that the detection instruction can be sent by nuclear power plant staff through a mobile device or the like, and can also be automatically generated after inputting the pressure stabilizer parameters and the weld parameters. Among them, the pressure stabilizer parameters include the shape information and size information of the nuclear power plant pressure stabilizer.

[0029] Furthermore, the weld parameters include the weld type and the weld position information of the pressure stabilizer weld; among them, the weld type characterizes the position of the curved surface and the branch pipe corresponding to the pressure stabilizer weld in the nuclear power plant pressure stabilizer, and the weld type includes the upper head weld, the lower head weld, and the manhole weld; among them, the upper head weld characterizes that the pressure stabilizer weld is at the top of the nuclear power plant pressure stabilizer, such as the connecting ring weld between the nozzle and the upper head, the connecting weld between the spray nozzle and the upper head, or the connecting ring weld between the upper head of the pressure stabilizer and the cylinder body; the lower head weld characterizes that the pressure stabilizer weld is at the bottom of the nuclear power plant pressure stabilizer, such as the connecting weld between the lower head and the surge pipe; the manhole weld includes, for example, the connecting weld between the manhole on the upper head of the pressure stabilizer and the head. The weld position information is the specific position information of each pressure stabilizer weld on the nuclear power plant pressure stabilizer.

[0030] Furthermore, the nuclear power plant pressure stabilizer in this embodiment includes a pressure stabilizer housing and at least one branch pipe. A curved surface is provided on the pressure stabilizer housing, and the branch pipe is arranged on the curved surface and is connected to the curved surface through a pressure stabilizer weld; optionally, in this embodiment, there are a total of eight different pressure stabilizer welds on the nuclear power plant pressure stabilizer, and the weld materials, weld thickness values, and weld width values of these eight different pressure stabilizer welds may be different.

[0031] S20: Determine the defect scanning device for defect detection of the nuclear power plant pressurizer and the defect scanning parameters of the defect scanning device according to the weld parameters and the pressurizer parameters;

[0032] It can be understood that the defect scanning device refers to the device used for defect detection of the pressurizer weld. Since different pressurizer welds are arranged at different positions of the nuclear power plant pressurizer, if the same defect scanning device is used for different pressurizer welds, it may lead to inaccurate weld defect detection and may also lead to the need to continuously move the scanning angle of the defect scanning device, etc., thereby resulting in low weld defect detection efficiency. In addition, since there may be a distribution of heating elements in the pressurizer weld and the heating elements will affect the accuracy of phased array ultrasonic defect detection, therefore, selecting a defect scanning device that matches the corresponding pressurizer weld for phased array ultrasonic defect detection can improve the defect detection efficiency and accuracy.

[0033] Furthermore, the defect scanning parameters are used to indicate the starting position of the phased array ultrasonic defect detection by the defect scanning device, including the horizontal axis position information and the vertical axis position information; it can be understood that the depth position information corresponding to the initial position of the defect scanning device is set to zero.

[0034] In one embodiment, the weld parameters include the weld type and the weld position information; in step S20, it includes:

[0035] Select a preset scanning device that matches the weld type from the preset scanning device library, and record the selected preset scanning device as the defect scanning device; at least one preset scanning device is included in the preset scanning device library;

[0036] It can be understood that the preset scanning device is a device designed in advance for different pressurizer welds, and at least one preset scanning device is stored in the preset scanning device library. Specifically, after receiving the detection instruction for defect detection of the nuclear power plant pressurizer, according to the weld type in the weld parameters in the detection instruction, determine the preset scanning device for the pressurizer weld, that is, select a preset scanning device that matches the weld type of the pressurizer weld.

[0037] In one embodiment, the step of selecting a preset scanning device that matches the weld type from the preset scanning device library and recording the selected preset scanning device as the defect scanning device includes:

[0038] When the weld type is the upper head weld, determine that the defect scanning device is a semi-automatic defect scanning device;

[0039] Understandably, as pointed out in the above description, the pressurizer weld with the weld type of the upper head weld is arranged above the nuclear power plant pressurizer. Therefore, selecting a semi-automatic defect scanning device can better perform phased array ultrasonic defect detection on the pressurizer weld with the weld type of the upper head weld.

[0040] When the weld type is the lower head weld, determine that the defect scanning device is a full-automatic defect scanning device;

[0041] Understandably, as pointed out in the above description, the pressurizer weld with the weld type of the lower head weld is arranged at the bottom of the nuclear power plant pressurizer. Since defect detection at the bottom position of the nuclear power plant pressurizer is more difficult than that at the top position of the nuclear power plant pressurizer, selecting a full-automatic defect scanning device can more flexibly adjust the ultrasonic beam emitted by the scanning device. A full-automatic defect scanning device can also be selected for the pressurizer weld with the weld type of the upper head weld.

[0042] When the weld type is the manhole weld, determine that the defect scanning device is a robotic arm defect scanning device.

[0043] Understandably, the robotic arm defect scanning device can better replace the manual operation of the scanning device and improve the accuracy of non-destructive testing. Therefore, a robotic arm defect scanning device can be selected when the weld type is the manhole weld. Similarly, a robotic arm defect scanning device can also be used for the pressurizer weld with the weld type of the upper head weld and the pressurizer weld with the weld type of the lower head weld.

[0044] According to the pressurizer parameters and the weld position information, determine the defect scanning parameters of the defect scanning device.

[0045] Specifically, after receiving the detection instruction for defect detection of the nuclear power plant pressurizer, the defect scanning parameters of the defect scanning device, that is, the initial position of the defect scanning device, can be determined according to the pressurizer parameters (characterizing the shape information and size information of the nuclear power plant pressurizer) and the weld position information in the weld parameters.

[0046] S30: Make the defect scanning device perform phased array ultrasonic defect detection from the outside of the pressurizer weld according to the defect scanning parameters to generate a defect detection waveform;

[0047] Understandably, the phased array ultrasonic flaw detection technology is a technology that changes the properties of the probe by different electronic excitation times. Multiple array elements in the probe are arranged in a certain shape and size to form an ultrasonic array probe. The waveform, amplitude, and phase delay of the signals emitted by each array element are adjusted respectively, so that the ultrasonic sub-beams emitted by each array element are superimposed and synthesized in space, thereby realizing the beam scanning, deflection, and focusing of ultrasonic waves, and defects in different orientations can be detected. All phased arrays in any arrangement can obtain a flexible sound beam by controlling the emission delay of the array elements and perform detection in a large area without moving the probe, ensuring high defect detection accuracy and detection efficiency. Among them, the probe in the above description is set on the defect scanning device, so as to emit ultrasonic beams through the probe on the defect scanning device for defect detection.

[0048] In one embodiment, in step S30, it includes:

[0049] Let the defect scanning device emit ultrasonic beams from the outside of the pressurizer weld according to the defect scanning parameters, and detect whether the ultrasonic beams are reflected;

[0050] Understandably, after determining the defect scanning device and the defect scanning parameters, the defect scanning device can emit ultrasonic beams from the outside of the pressurizer weld according to the defect scanning parameters, and detect whether the ultrasonic beams are reflected during the emission process. If it is detected that the ultrasonic beams are reflected during the emission process, it indicates that the ultrasonic beams encounter defect obstacles; if it is not detected that the ultrasonic beams are reflected during the emission process, it indicates that the ultrasonic beams do not encounter defect obstacles.

[0051] When it is detected that the ultrasonic beams are reflected, obtain the defect detection parameters from the matching encoder of the defect scanning device;

[0052] Understandably, the matching encoder is used to record and store defect detection parameters. The matching encoder can be set in the defect scanning device or on other devices and communicate with the defect scanning device; among them, the defect detection parameters include parameters such as the reflection amount and propagation time of the ultrasonic beams.

[0053] Specifically, after letting the defect scanning device emit ultrasonic beams from the outside of the pressurizer weld according to the defect scanning parameters and detecting whether the ultrasonic beams are reflected, when it is detected that the ultrasonic beams are reflected, obtain the defect detection parameters from the matching encoder associated with the defect scanning device.

[0054] In one embodiment, before obtaining the defect detection parameters from the matching encoder of the defect scanning device, it further includes:

[0055] Obtain the cumulative emission duration of the sound beam and the sound beam reflection amount; the cumulative emission duration of the sound beam refers to the time period from when the defect scanning device starts to emit the ultrasonic sound beam to when the reflection phenomenon of the ultrasonic sound beam is detected.

[0056] It can be understood that the cumulative emission duration of the sound beam refers to the time period from when the defect scanning device starts to emit the ultrasonic sound beam to when the reflection phenomenon of the ultrasonic sound beam is detected; the sound beam reflection amount refers to the amount of the sound beam reflected when the ultrasonic sound beam encounters a defect obstacle.

[0057] According to the cumulative emission duration of the sound beam and the sound beam reflection amount, determine the defect detection parameter through the matching encoder.

[0058] Specifically, after obtaining the cumulative emission duration of the sound beam and the sound beam reflection amount, the cumulative emission duration of the sound beam and the sound beam reflection amount can be determined and stored as defect detection parameters through the matching encoder according to the obtained cumulative emission duration of the sound beam and the sound beam reflection amount.

[0059] Generate the defect detection waveform through a preset waveform generation device according to the defect detection parameter.

[0060] Specifically, after obtaining the defect detection parameter from the matching encoder of the defect scanning device, generate a defect detection waveform corresponding to the defect detection parameter through a preset waveform generation device according to the defect detection parameter. Among them, the defect detection waveform can be drawn into waveforms of different colors according to the magnitude of the sound beam reflection amount. For example, the larger the sound beam reflection amount, the darker the color of the corresponding defect detection waveform.

[0061] S40: Obtain a preset detection map, and determine the defect position information corresponding to the pressurizer weld according to the preset detection map and the defect detection waveform.

[0062] It can be understood that the preset detection map is a map containing multiple preset detection waveforms obtained through a defect detection experiment in advance. Specifically, after making the defect scanning device perform phased array ultrasonic defect detection on the outside of the pressurizer weld according to the defect scanning parameter and generating a defect detection waveform, obtain the preset detection map, and determine the defect position information corresponding to the pressurizer weld according to the defect detection waveform and each preset detection waveform in the preset detection map.

[0063] In one embodiment, before step S40, it further includes:

[0064] Control the defect scanning device to scan a preset comparison test block to obtain the preset detection pattern; wherein, a plurality of comparison defect holes distributed in a stepped manner are provided on the preset comparison test block; the preset detection pattern characterizes the depth of the comparison defect holes in the preset comparison test block; the preset comparison test block includes a test block surface consistent with the surface material and size and a test block branch pipe consistent with the branch pipe material and size; the test block branch pipe is arranged on the test block surface and is connected to the test block surface through a test block weld.

[0065] It can be understood that a plurality of comparison defect holes distributed in a stepped manner are provided on the preset comparison test block, and the preset detection waveform in the preset detection pattern characterizes the depth of the comparison defect holes in the preset comparison test block. That is, by setting a plurality of comparison defect holes distributed in a stepped manner in the comparison test block (for example, setting a comparison defect hole at 10 mm of the test block weld of the comparison test block and a comparison defect hole at 20 mm), after scanning the preset comparison test block by the defect scanning device, the preset detection waveform corresponding to each different comparison defect hole can be determined, and then the preset detection pattern can be generated according to the preset detection waveforms of the comparison defect holes.

[0066] Furthermore, the preset comparison test block is a test block used to simulate the defect positions of different pressurizer welds on a nuclear power plant pressurizer. Therefore, corresponding preset comparison test blocks can be simulated for different pressurizer welds; the preset comparison test block includes a test block surface consistent with the surface material and size and a test block branch pipe consistent with the branch pipe material and size; the test block branch pipe is arranged on the test block surface and is connected to the test block surface through a test block weld. It can be understood that the test block surface on the preset comparison test block is the surface of the simulated nuclear power plant pressurizer; the test block branch pipe on the preset comparison test block is the branch pipe of the simulated nuclear power plant pressurizer. In this way, by detecting the defects of the test block weld (i.e., the pressurizer weld of the simulated nuclear power plant pressurizer) on the preset comparison test block, the obtained preset detection waveform can characterize the waveform during the defect detection on the nuclear power plant pressurizer body, improving the safety and accuracy of the defect detection simulation experiment.

[0067] Furthermore, in this embodiment, a plurality of comparison defect holes distributed in a stepped manner are set in the same preset comparison test block. In addition, different preset comparison test blocks can also be used for different comparison defect holes, that is, a plurality of preset comparison test blocks with the same size and material are simulated, and different comparison defect holes are set on each preset comparison test block.

[0068] In one embodiment, in step S40, that is, the determining the defect position information corresponding to the pressurizer weld according to the preset detection pattern and the defect detection waveform includes:

[0069] Obtain all the preset detection waveforms in the preset detection map and the defect detection waveform; one of the preset detection waveforms is associated with the depth of one of the comparison defect holes.

[0070] Understandably, a plurality of comparison defect holes arranged in a stepped distribution are provided on the preset comparison test block. Therefore, after controlling the defect scanning device to scan the preset comparison test block, the preset detection waveforms corresponding to each comparison defect hole can be determined. Since the depths of different comparison defect holes are different, one preset detection waveform is associated with the depth of one comparison defect hole.

[0071] Perform similarity matching between the defect detection waveform and each of the preset detection waveforms to obtain the waveform similarity between the defect detection waveform and each of the preset detection waveforms.

[0072] Specifically, after obtaining all the preset detection waveforms in the preset detection map and the defect detection waveform, perform similarity matching between the defect detection waveform and each preset detection waveform. For example, determine the waveform similarity between the defect detection waveform and each preset detection waveform through the error energy method (that is, select the comparison multiple, and then approximate the defect detection image to each preset detection waveform through the comparison multiple).

[0073] Compare the waveform similarity with a preset similarity threshold, and record the preset detection waveform corresponding to the waveform similarity greater than or equal to the preset similarity threshold as the matching detection waveform.

[0074] Specifically, after performing similarity matching between the defect detection waveform and each of the preset detection waveforms to obtain the waveform similarity between the defect detection waveform and each of the preset detection waveforms, compare the waveform similarity with the preset similarity threshold, and record the preset detection waveform corresponding to the waveform similarity greater than or equal to the preset similarity threshold as the matching detection waveform. Further, if there are multiple waveform similarities greater than or equal to the preset similarity threshold, select the preset detection waveform that is greater than or equal to the preset similarity threshold and has the largest waveform similarity as the matching detection waveform.

[0075] Record the depth of the comparison defect hole associated with the matching detection waveform as the depth position information, and determine the defect position information according to the depth position information and the defect scanning parameters.

[0076] Immediately, the flaw detection parameter in the above description is used to indicate the starting position of the phased array ultrasonic flaw detection by the flaw detection device, including the horizontal axis position information and the vertical axis position information, and the depth position information corresponding to the initial position of the flaw detection device is set to zero; however, when performing phased array ultrasonic flaw detection by the flaw detection device, the flaw position is detected from the depth of the pressurizer weld. Therefore, the horizontal axis position in the flaw position information is the horizontal axis position information in the flaw detection parameter, and the vertical axis position in the flaw position information is the vertical axis position information in the flaw detection parameter.

[0077] Further, after recording the preset detection waveform corresponding to the waveform similarity greater than or equal to the preset similarity threshold as the matching detection waveform, record the depth of the comparison flaw hole associated with the matching detection waveform as the depth position information. Then, based on this depth position information, as well as the horizontal axis position information and the vertical axis position information in the flaw detection parameter, the flaw position information corresponding to the pressurizer weld can be determined. Furthermore, the nuclear power plant staff can determine the nature, impact, etc. of the flaw based on this flaw position information, thereby ensuring the safe operation of the nuclear power plant pressurizer and improving the safety of the nuclear power plant pressurizer.

[0078] In this embodiment, selecting a flaw detection device that matches the pressurizer weld for phased array ultrasonic flaw detection can improve the flaw detection efficiency and accuracy; and in this embodiment, phased array ultrasonic flaw detection is performed from the outside of the pressurizer weld, so that the risk of the flaw detection device falling into the nuclear power plant pressurizer can be avoided, improving the safety of flaw detection and the life of the nuclear power plant pressurizer.

[0079] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0080] In one embodiment, a device for determining the flaw position of a nuclear power plant pressurizer is provided, and this device for determining the flaw position of a nuclear power plant pressurizer corresponds one-to-one to the method for determining the flaw position of a nuclear power plant pressurizer in the above embodiment. As Figure 3 shown, this device for determining the flaw position of a nuclear power plant pressurizer includes a detection instruction receiving module 10, a flaw detection device selection module 20, an ultrasonic flaw detection module 30, and a flaw position information determination module 40. The detailed description of each functional module is as follows:

[0081] A detection instruction receiving module 10 is configured to receive a detection instruction for defect detection of a pressurizer of a nuclear power plant; the pressurizer of the nuclear power plant includes a pressurizer housing and at least one branch pipe; a curved surface is provided on the pressurizer housing, and the branch pipe is arranged on the curved surface and connected to the curved surface through a pressurizer weld; the detection instruction includes the pressurizer parameters and weld parameters corresponding to the pressurizer weld.

[0082] A defect scanning device selection module 20 is configured to determine a defect scanning device for defect detection of the pressurizer of the nuclear power plant and defect scanning parameters of the defect scanning device according to the weld parameters and the pressurizer parameters.

[0083] An ultrasonic defect detection module 30 is configured to cause the defect scanning device to perform phased array ultrasonic defect detection from the outside of the pressurizer weld according to the defect scanning parameters and generate a defect detection waveform.

[0084] A defect position information determination module 40 is configured to obtain a preset detection map and determine defect position information corresponding to the pressurizer weld according to the preset detection map and the defect detection waveform.

[0085] Preferably, the weld parameters include a weld type and weld position information; the defect scanning device selection module includes:

[0086] A defect scanning device selection unit is configured to select a preset scanning device matching the weld type from a preset scanning device library and record the selected preset scanning device as the defect scanning device; the preset scanning device library includes at least one preset scanning device.

[0087] A defect scanning parameter determination unit is configured to determine defect scanning parameters of the defect scanning device according to the pressurizer parameters and the weld position information.

[0088] Preferably, the defect scanning device selection unit includes:

[0089] A first device selection subunit is configured to determine that the defect scanning device is a semi-automatic defect scanning device when the weld type is an upper head weld.

[0090] A second device selection subunit is configured to determine that the defect scanning device is a full-automatic defect scanning device when the weld type is a lower head weld.

[0091] A third device selection subunit is configured to determine that the defect scanning device is a robotic arm defect scanning device when the weld type is a manhole weld.

[0092] Preferably, the ultrasonic defect detection module includes:

[0093] An ultrasonic defect detection unit, configured to cause the defect scanning device to emit an ultrasonic beam from the outside of the pressure vessel weld according to the defect scanning parameters, and detect whether the ultrasonic beam is reflected;

[0094] A defect detection parameter acquisition unit, configured to, when it is detected that the ultrasonic beam is reflected, acquire defect detection parameters from the matching encoder of the defect scanning device;

[0095] A defect detection waveform generation unit, configured to generate the defect detection waveform through a preset waveform generation device according to the defect detection parameters.

[0096] Preferably, the nuclear power plant pressure vessel defect position determination device further includes:

[0097] An acoustic beam data acquisition module, configured to acquire the cumulative acoustic beam emission duration and the acoustic beam reflection amount; the cumulative acoustic beam emission duration refers to the time period from when the defect scanning device starts to emit the ultrasonic beam to when it is detected that the ultrasonic beam is reflected;

[0098] A defect detection parameter determination module, configured to determine the defect detection parameters through the matching encoder according to the cumulative acoustic beam emission duration and the acoustic beam reflection amount.

[0099] Preferably, the nuclear power plant pressure vessel defect position determination device further includes:

[0100] A preset detection map generation module, configured to control the defect scanning device to scan a preset comparison test block to obtain the preset detection map; wherein, a plurality of comparison defect holes are arranged in a stepped manner on the preset comparison test block; the preset detection map characterizes the depth of the comparison defect holes in the preset comparison test block; the preset comparison test block includes a test block surface that is the same as the surface material and size, and a test block branch pipe that is the same as the branch pipe material and size; the test block branch pipe is arranged on the test block surface and is connected to the test block surface through a test block weld.

[0101] Preferably, the defect position information determination module 40 includes:

[0102] A detection waveform acquisition unit, configured to acquire all the preset detection waveforms in the preset detection map and the defect detection waveform; one of the preset detection waveforms is associated with the depth of one of the comparison defect holes;

[0103] A waveform similarity matching unit, configured to perform similarity matching between the defect detection waveform and each of the preset detection waveforms to obtain the waveform similarity between the defect detection waveform and each of the preset detection waveforms;

[0104] A waveform matching unit, configured to compare the waveform similarity with a preset similarity threshold, and record a preset detection waveform corresponding to a waveform similarity greater than or equal to the preset similarity threshold as a matching detection waveform;

[0105] A defect position information determination unit, configured to record the depth of a comparison defect hole associated with the matching detection waveform as depth position information, and determine the defect position information according to the depth position information and the defect scanning parameters.

[0106] For the specific limitations of the device for determining the defect position of a nuclear power plant pressurizer, reference may be made to the limitations of the method for determining the defect position of a nuclear power plant pressurizer in the foregoing text, which will not be elaborated herein. Each module in the above device for determining the defect position of a nuclear power plant pressurizer can be implemented in whole or in part by software, hardware, and their combination. The above modules can be embedded in or independent of a processor in a computer device in the form of hardware, or stored in a memory in the computer device in the form of software, so as to facilitate the processor to call and execute the operations corresponding to the above modules.

[0107] In one embodiment, a computer device is provided. The computer device can be a server, and its internal structure diagram can be as Figure 4 shown. The computer device includes a processor, a memory, a network interface, and a database connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store the data used in the method for determining the defect position of a nuclear power plant pressurizer in the above embodiment. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, it implements a method for determining the defect position of a nuclear power plant pressurizer.

[0108] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it implements the method for determining the defect position of a nuclear power plant pressurizer in the above embodiment.

[0109] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, it implements the method for determining the defect position of a nuclear power plant pressurizer in the above embodiment.

[0110] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, storage, database, or other medium used in the various embodiments provided in the present application can include non-volatile and / or volatile memories. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM), etc.

[0111] Those skilled in the art can clearly understand that for the convenience and brevity of description, only the above division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0112] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention and should all be included in the protection scope of the present invention.

Claims

1. A method for determining the defect location of a pressurizer in a nuclear power plant, characterized in that, Including: Receiving a detection instruction for defect detection of a pressurizer in a nuclear power plant; the pressurizer in the nuclear power plant includes a pressurizer shell and at least one branch pipe; a curved surface is provided on the pressurizer shell, and the branch pipe is arranged on the curved surface and connected to the curved surface through a pressurizer weld; the detection instruction includes the pressurizer parameters and weld parameters corresponding to the pressurizer weld; Determining a defect scanning device for defect detection of the pressurizer in the nuclear power plant and defect scanning parameters of the defect scanning device according to the weld parameters and the pressurizer parameters; Making the defect scanning device perform phased array ultrasonic defect detection from the outside of the pressurizer weld according to the defect scanning parameters to generate a defect detection waveform; The defect detection waveform is drawn into waveforms of different colors according to the magnitude of the sound beam reflection amount; the sound beam reflection amount refers to the amount of the sound beam reflected when the ultrasonic sound beam encounters a defect obstacle; Obtaining a preset detection map, and determining defect position information corresponding to the pressurizer weld according to the preset detection map and the defect detection waveform.

2. The method for determining the defect location of a pressurizer in a nuclear power plant according to claim 1, characterized in that, The weld parameters include weld type and weld position information; The determining a defect scanning device for defect detection of the pressurizer in the nuclear power plant and defect scanning parameters of the defect scanning device according to the weld parameters and the pressurizer parameters includes: Selecting a preset scanning device matching the weld type from a preset scanning device library, and recording the selected preset scanning device as the defect scanning device; at least one preset scanning device is included in the preset scanning device library; Determining defect scanning parameters of the defect scanning device according to the pressurizer parameters and the weld position information.

3. The method for determining the defect location of a pressurizer in a nuclear power plant according to claim 2, characterized in that, The selecting a preset scanning device matching the weld type from a preset scanning device library and recording the selected preset scanning device as the defect scanning device includes: When the weld type is an upper head weld, determining that the defect scanning device is a semi-automatic defect scanning device; When the weld type is a lower head weld, determining that the defect scanning device is a full-automatic defect scanning device; When the weld type is a manhole weld, determining that the defect scanning device is a robotic arm defect scanning device.

4. The method for determining the defect location of a pressurizer in a nuclear power plant according to claim 1, characterized in that, The making the defect scanning device perform phased array ultrasonic defect detection from the outside of the pressurizer weld according to the defect scanning parameters to generate a defect detection waveform includes: Making the defect scanning device emit an ultrasonic sound beam from the outside of the pressurizer weld according to the defect scanning parameters, and detecting whether the ultrasonic sound beam has a reflection phenomenon; When it is detected that the ultrasonic sound beam has a reflection phenomenon, obtaining defect detection parameters from a matching encoder of the defect scanning device; Generating the defect detection waveform through a preset waveform generating device according to the defect detection parameters.

5. The method for determining the defect location of a pressurizer in a nuclear power plant according to claim 4, characterized in that, Before obtaining the defect detection parameters from the matching encoder of the defect scanning device, it further includes: Obtain the cumulative emission duration of the sound beam and the sound beam reflection amount; the cumulative emission duration of the sound beam refers to the time period from when the defect scanning device starts to emit the ultrasonic sound beam to when the reflection phenomenon of the ultrasonic sound beam is detected. According to the cumulative emission duration of the sound beam and the sound beam reflection amount, determine the defect detection parameters through the matching encoder.

6. The method for determining the defect location of a pressurizer in a nuclear power plant according to claim 1, characterized in that, Before obtaining the preset detection map, it further includes: Control the defect scanning device to scan a preset comparison test block to obtain the preset detection map; wherein, a plurality of comparison defect holes distributed in a stepped manner are provided on the preset comparison test block; the preset detection map characterizes the depth of the comparison defect holes in the preset comparison test block; the preset comparison test block includes a test block surface consistent with the surface material and size, and a test block branch pipe consistent with the branch pipe material and size; the test block branch pipe is arranged on the test block surface and is connected to the test block surface through a test block weld.

7. The method for determining the defect location of a pressurizer in a nuclear power plant according to claim 6, characterized in that, The determining the defect position information corresponding to the pressurizer weld according to the preset detection map and the defect detection waveform includes: Obtain all the preset detection waveforms in the preset detection map and the defect detection waveform; one preset detection waveform is associated with the depth of one comparison defect hole. Perform similarity matching between the defect detection waveform and each preset detection waveform to obtain the waveform similarity between the defect detection waveform and each preset detection waveform. Compare the waveform similarity with a preset similarity threshold, and record the preset detection waveform corresponding to the waveform similarity greater than or equal to the preset similarity threshold as the matching detection waveform. Record the depth of the comparison defect hole associated with the matching detection waveform as the depth position information, and determine the defect position information according to the depth position information and the defect scanning parameters.

8. A device for determining the defect location of a pressurizer in a nuclear power plant, characterized in that, It includes: A detection instruction receiving module, configured to receive a detection instruction for defect detection of a nuclear power plant pressurizer; the nuclear power plant pressurizer includes a pressurizer housing and at least one branch pipe; a curved surface is provided on the pressurizer housing, and the branch pipe is arranged on the curved surface and is connected to the curved surface through a pressurizer weld; the detection instruction includes the pressurizer parameters and the weld parameters corresponding to the pressurizer weld. A defect scanning device selection module, configured to determine a defect scanning device for defect detection of the nuclear power plant pressurizer and the defect scanning parameters of the defect scanning device according to the weld parameters and the pressurizer parameters. An ultrasonic defect detection module, configured to cause the defect scanning device to perform phased array ultrasonic defect detection from the outside of the pressurizer weld according to the defect scanning parameters to generate a defect detection waveform. The defect detection waveform is drawn into waveforms of different colors according to the magnitude of the sound beam reflection amount; the sound beam reflection amount refers to the amount of the sound beam reflected when the ultrasonic sound beam encounters a defect obstacle. A defect position information determination module, configured to obtain a preset detection map, and determine the defect position information corresponding to the pressurizer weld according to the preset detection map and the defect detection waveform.

9. The device for determining the defect position of a pressurizer in a nuclear power plant according to claim 8, wherein, The weld parameters include the weld type and the weld position information. The defect scanning device selection module includes: A defect scanning device selection unit, configured to select a preset scanning device that matches the weld type from a preset scanning device library, and record the selected preset scanning device as the defect scanning device; the preset scanning device library contains at least one preset scanning device; A defect scanning parameter determination unit, configured to determine the defect scanning parameters of the defect scanning device according to the pressurizer parameters and the weld position information.

10. The device for determining the defect position of a pressurizer in a nuclear power plant according to claim 8, wherein, The ultrasonic defect detection module includes: An ultrasonic defect detection unit, configured to cause the defect scanning device to emit an ultrasonic beam from the outside of the pressurizer weld according to the defect scanning parameters, and detect whether the ultrasonic beam is reflected; A defect detection parameter acquisition unit, configured to acquire defect detection parameters from a matching encoder of the defect scanning device when it is detected that the ultrasonic beam is reflected; A defect detection waveform generation unit, configured to generate the defect detection waveform through a preset waveform generation device according to the defect detection parameters.

11. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein, When the processor executes the computer program, it implements the method for determining the defect position of a nuclear power plant pressurizer as described in any one of claims 1 to 7.

12. A computer-readable storage medium storing a computer program, wherein, When the computer program is executed by the processor, it implements the method for determining the defect position of a nuclear power plant pressurizer as described in any one of claims 1 to 7.

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