Method and system for detecting defects of nuclear power equipment

Abstract

The invention provides a nuclear power equipment defect detection method and system, and the method comprises the steps: detecting the surface of nuclear power equipment, so as to screen out a to-be-detected region with a defect opening; detecting the surface of the to-be-detected area by using a penetration detection method to obtain surface detection information; detecting the interior of the to-be-detected area by using an ultrasonic detection method to obtain internal detection information; determining the position of the surface defect according to the surface detection information, and recording the initial morphology of the surface defect; grinding and polishing the surface defect, and recording the macroscopic and microscopic morphology of the surface defect; integrating the initial morphology, the macroscopic morphology and the microscopic morphology to obtain surface defect information; and determining the position of the internal defect according to the internal detection information, grinding and polishing the position of the internal defect to expose the internal defect, and recording the macroscopic and microscopic morphology of the internal defect to obtain the internal defect information. According to the invention, the size, the form, the distribution position and the type of the defect can be accurately measured.

Description

Technical Field

[0001] The present invention relates to the field of nuclear power equipment defect detection, and in particular to a nuclear power equipment defect detection method and a detection system. Background Art

[0002] During the installation, operation or maintenance of nuclear power equipment, it will be affected by factors such as stress, radiation, and environmental media, resulting in defects such as pits, surface cracks, and internal cracks. The size, shape, and type of these defects have a crucial impact on the material and performance of nuclear power equipment. In order to improve the safety and reliability of nuclear power equipment and control the impact of harmful defects, it is necessary to accurately measure, characterize, and classify the size, shape, and type of these defects in order to meet the operational requirements required for nuclear safety. At present, the detection of defects in nuclear power equipment is still at the stage of manual visual inspection and measurement using steel tape measures, which cannot meet the requirements of nuclear equipment inspection. Therefore, there is room for improvement. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a method and system for detecting defects in nuclear power equipment, so as to solve the problem that the detection method of defects in nuclear power equipment in the prior art still needs to be improved.

[0004] To achieve the above-mentioned object and other related objects, the present invention provides a method for detecting defects in nuclear power equipment, the method comprising:

[0005] Inspect the surface of nuclear power equipment to screen out areas with defect openings to be inspected;

[0006] Using a penetration detection method to detect the surface of the area to be detected, and obtain surface detection information; using an ultrasonic detection method to detect the interior of the area to be detected, and obtain interior detection information;

[0007] Confirming the location of the surface defect according to the surface detection information, and recording the initial morphology of the surface defect; grinding and polishing the surface defect, and recording the macroscopic and microscopic morphologies of the surface defect; integrating the initial morphology with the macroscopic and microscopic morphologies to obtain the surface defect information;

[0008] confirming the location of the internal defect according to the internal detection information, grinding and polishing the location of the internal defect to reveal the internal defect, recording the macroscopic and microscopic morphologies of the internal defect, and obtaining the internal defect information;

[0009] Defect information is obtained according to the surface defect information and / or the internal defect information.

[0010] In one embodiment of the present invention, the step of detecting the surface of the area to be detected by using a penetration detection method to obtain surface detection information includes:

[0011] Detect the material of the area to be detected and determine the material information:

[0012] When the material information is a non-magnetic material, a penetration detection method is used to detect the surface of the area to be detected to obtain surface detection information;

[0013] When the material information is a magnetic material, a magnetic particle detection method or a penetration detection method is used to detect the surface of the area to be detected to obtain surface detection information.

[0014] In one embodiment of the present invention, the step of grinding and polishing the surface defects and recording the macroscopic and microscopic morphologies of the surface defects comprises:

[0015] According to a preset first grinding amount, the surface defect is ground and polished for multiple times until the surface defect disappears, and after each grinding and polishing, an intermediate polishing morphology on the corresponding polishing surface is obtained;

[0016] The macroscopic and microscopic morphologies are obtained based on all the intermediate polishing morphologies.

[0017] In one embodiment of the present invention, the step of grinding and polishing the surface defect multiple times according to a preset first grinding amount until the surface defect disappears, and obtaining an intermediate polishing morphology on the corresponding polishing surface after each grinding and polishing comprises:

[0018] According to a preset first grinding amount, the surface defect is ground and polished to obtain a polished surface of the surface defect, an intermediate polishing morphology is obtained on the polished surface, and it is determined whether the surface defect disappears:

[0019] When the surface defects disappear, stop grinding;

[0020] When the surface defect has not disappeared, the surface defect is repeatedly ground and polished according to the first grinding amount until the surface defect disappears, and after each grinding and polishing, a polished surface of the surface defect is obtained, and an intermediate polished morphology is obtained on the polished surface.

[0021] In one embodiment of the present invention, the step of grinding and polishing the position of the internal defect to reveal the internal defect comprises:

[0022] According to the preset second grinding amount, the position of the internal defect is ground and polished multiple times to obtain a polished surface at the position of the internal defect, and after each grinding and polishing, the polished surface is inspected using a magnetic particle inspection method or a penetration inspection method until the internal defect is revealed at the position of the internal defect.

[0023] In one embodiment of the present invention, the step of grinding and polishing the position of the internal defect multiple times according to a preset second grinding amount to obtain a polished surface at the position of the internal defect, and after each grinding and polishing, performing detection on the polished surface using a magnetic particle detection method or a penetration detection method until the internal defect is revealed at the position of the internal defect includes:

[0024] The position of the internal defect is ground and polished according to a preset second grinding amount to obtain a polished surface at the position of the internal defect, and a magnetic particle detection method or a penetration detection method is used to detect the polished surface, and it is determined whether the position of the internal defect reveals the internal defect:

[0025] When the position of the internal defect reveals the internal defect, stopping the detection;

[0026] When the location of the internal defect does not reveal the internal defect, the location of the internal defect is repeatedly ground and polished according to the second grinding amount to obtain a polished surface at the location of the internal defect, and after each grinding and polishing, a magnetic particle detection method or a penetration detection method is used to detect the polished surface until the internal defect is revealed at the location of the internal defect.

[0027] In one embodiment of the present invention, after the step of revealing the internal defect in the area to be inspected, the method comprises:

[0028] Recording the initial morphology of the internal defect;

[0029] According to a preset third grinding amount, the internal defect is ground and polished for multiple times until the internal defect disappears, and after each grinding and polishing, an intermediate polishing morphology on the corresponding polishing surface is obtained;

[0030] The macroscopic and microscopic morphologies are obtained based on all the intermediate polishing morphologies.

[0031] In one embodiment of the present invention, the step of recording the macroscopic and microscopic morphologies of the surface defects comprises:

[0032] Detecting the surface defects and recording the macroscopic morphological features of the surface defects;

[0033] Based on the metallographic replication process, metallographic detection is performed on the surface defects to record the microscopic morphological characteristics of the surface defects;

[0034] The macroscopic morphological features and the microscopic morphological features are combined to obtain macroscopic and microscopic morphologies.

[0035] In one embodiment of the present invention, the step of confirming the location of the internal defect according to the internal detection information, grinding and polishing the location of the internal defect to reveal the internal defect includes:

[0036] Confirm the location of the internal defect according to the internal detection information, and compare the location of the surface defect with the location of the internal defect:

[0037] When the surface defect corresponds to the outside of the position of the internal defect, after recording the initial morphology and the macroscopic and microscopic morphologies of the surface defect, the area to be inspected is polished and the internal defect is revealed;

[0038] When the outer side of the position of the internal defect does not correspond to the surface defect, the area to be inspected is polished and the internal defect is exposed.

[0039] The present invention also provides a nuclear power equipment defect detection system, the system comprising:

[0040] Cameras are used to inspect the surface of nuclear power equipment;

[0041] A detection unit, used to detect the surface of the area to be detected by using a penetration detection method to obtain surface detection information; and to detect the interior of the area to be detected by using an ultrasonic detection method to obtain interior detection information;

[0042] A grinding and polishing unit, used for grinding and polishing the surface defects, and grinding and polishing the positions of the internal defects to reveal the internal defects;

[0043] A processing unit, used to screen out the area to be inspected with defect openings based on the detection of the surface of the nuclear power equipment by the camera; used to confirm the position of the surface defect according to the surface detection information and record the initial morphology of the surface defect; used to record the macroscopic and microscopic morphologies of the surface defect after the surface defect is polished by the polishing unit; used to integrate the initial morphology with the macroscopic and microscopic morphologies to obtain the surface defect information;

[0044] The processing unit is further used to confirm the position of the internal defect according to the internal detection information, and after the grinding and polishing unit grinds and polishes the position of the internal defect and reveals the internal defect, record the macroscopic and microscopic morphologies of the internal defect to obtain the internal defect information;

[0045] The processing unit is further configured to obtain defect information according to the surface defect information and / or the internal defect information.

[0046] As described above, a method and system for detecting defects in nuclear power equipment of the present invention can effectively and accurately measure, characterize and characterize the size, shape, distribution location and type of defects, which is helpful for analyzing the causes of defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 Schematic diagram of bending defects on nuclear power equipment in the prior art.

[0048] Figure 2 A schematic diagram of a bifurcation defect on a nuclear power device in the prior art.

[0049] Figure 3 It is a schematic diagram of grid-shaped defects on nuclear power equipment in the prior art.

[0050] Figure 4 A schematic diagram of the steps of a method for detecting defects in nuclear power equipment provided in one embodiment of the present invention.

[0051] Figure 5 A structural block diagram of a nuclear power equipment defect detection system provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0052] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0053] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0054] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0055] See also Figures 1 to 5 The present invention proposes a method and system for detecting defects in nuclear power equipment, which can be applied to the field of detecting defects in nuclear power equipment, such as Figure 1 , Figure 2 and Figure 3 As shown, the present invention can accurately measure, characterize and classify the size, shape, distribution location and type of surface defects and internal defects in nuclear power equipment, which is helpful to analyze the causes of surface defects and internal defects, so as to formulate corresponding improvement measures and methods to achieve safe and reliable operation of nuclear power equipment.

[0056] See also Figure 4 In one embodiment of the present invention, the present invention provides a method for detecting defects in nuclear power equipment, which may include the following steps.

[0057] Step S10: inspect the surface of the nuclear power equipment to screen out areas to be inspected that have defect openings.

[0058] Step S20: Use a penetration detection method to detect the surface of the area to be detected to obtain surface detection information; use an ultrasonic detection method to detect the interior of the area to be detected to obtain interior detection information.

[0059] Step S30, confirm the location of the surface defect according to the surface detection information, and record the initial morphology of the surface defect; grind and polish the surface defect, and record the macroscopic and microscopic morphologies of the surface defect; integrate the initial morphology and the macroscopic and microscopic morphologies to obtain the surface defect information.

[0060] Step S40, confirming the location of the internal defect according to the internal detection information, grinding and polishing the location of the internal defect to reveal the internal defect, recording the macroscopic and microscopic morphologies of the internal defect, and obtaining the internal defect information.

[0061] Step S50: Obtain defect information according to the surface defect information and / or the internal defect information.

[0062] The above steps are described in detail below through specific embodiments.

[0063] Step S10: inspect the surface of the nuclear power equipment to screen out areas to be inspected that have defect openings.

[0064] Specifically, the surface defects of nuclear power equipment can be preliminarily determined by observing the area to be inspected on the nuclear power equipment through a camera to obtain observation information. The observation information is expressed as information on whether there are defect openings on the surface of the area to be inspected. For example, the surface defects of the metal material weld or base material area of ​​the nuclear power equipment are preliminarily observed, and the location and range of the surface defects are determined based on the characteristics such as on-site traces, and the opening of the surface defects is obtained.

[0065] Step S20: Use a penetration detection method to detect the surface of the area to be detected to obtain surface detection information; use an ultrasonic detection method to detect the interior of the area to be detected to obtain interior detection information.

[0066] Specifically, the observation information is initially detected by the camera, which can only find surface defects. Therefore, based on the observation information, the surface of the inspection area can be inspected using the penetration detection method to obtain surface inspection information. The surface inspection information can reflect the location of the surface defects, but the specific morphology of the surface defects still needs further inspection.

[0067] Furthermore, if you want to detect whether there are internal defects in nuclear power equipment, you can use ultrasonic testing methods to detect the inside of the inspection area to obtain internal detection information. The internal detection information can reflect the location of the internal defects, but the specific morphology information of the internal defects still needs further testing.

[0068] Step S30, confirm the location of the surface defect according to the surface detection information, and record the initial morphology of the surface defect; grind and polish the surface defect, and record the macroscopic and microscopic morphologies of the surface defect; integrate the initial morphology and the macroscopic and microscopic morphologies to obtain the surface defect information.

[0069] Specifically, the location of the surface defect is confirmed according to the surface detection information, and the initial morphology of the surface defect is recorded. In order to more accurately understand the morphological information of the surface defect and analyze the cause of the surface defect, the surface defect can be polished and the polished morphology of the surface defect can be recorded. Among them, the polished morphology of the surface defect can correspond to the morphological information corresponding to the surface defect after multiple polishing. The initial morphology and the polished morphology are integrated to obtain the surface defect information.

[0070] Step S40, confirming the location of the internal defect according to the internal detection information, grinding and polishing the location of the internal defect to reveal the internal defect, recording the macroscopic and microscopic morphologies of the internal defect, and obtaining the internal defect information.

[0071] Specifically, since the internal defects exist inside the nuclear power equipment, the area to be inspected needs to be polished to reveal the internal defects, and then the polished morphology of the internal defects can be recorded to obtain the internal defect information. The polished morphology of the internal defects can correspond to the morphological information corresponding to the internal defects after multiple polishing.

[0072] Step S50: Obtain defect information according to the surface defect information and / or the internal defect information.

[0073] See also Figure 4 In one embodiment of the present invention, in step S20, the surface of the inspection area is inspected using a penetration inspection method, and the step of obtaining surface inspection information may include step S210, step S220 and step S230.

[0074] Step S210: Detect the material of the area to be detected and determine the material information.

[0075] Step S220: When the material information is a non-magnetic material, a penetration detection method is used to detect the surface of the area to be detected to obtain surface detection information.

[0076] Specifically, if the equipment material is austenitic stainless steel (non-magnetic material), according to NB / T 47013.5-2015 "Non-destructive Testing of Pressure Equipment - Part 5: Penetrant Testing" or related standards, a conventional penetration testing method is used to test the surface of the inspection area and display relevant defect information, and mark and record it.

[0077] Step S230: When the material information is a magnetic material, a magnetic particle detection method or a penetration detection method is used to detect the surface of the area to be detected to obtain surface detection information.

[0078] Specifically, if the equipment material is non-austenitic stainless steel (including magnetic materials), the surface of the area to be inspected shall be inspected and relevant defects shall be displayed, and marked and recorded according to NB / T 47013.4-2015 "Non-destructive Testing of Pressure Equipment - Part 4: Magnetic Particle Testing" or related standards. If the size of the components of nuclear power equipment does not meet the conditions for magnetic particle testing, conventional penetration testing methods can also be used.

[0079] See also Figure 4 In one embodiment of the present invention, in step S30, the surface defects are polished and the step of recording the macroscopic and microscopic morphologies of the surface defects includes step S310 and step S320.

[0080] Step S301, grinding and polishing the surface defects for multiple times according to a first grinding amount until the surface defects disappear, and obtaining an intermediate polishing morphology on the corresponding polishing surface after each grinding and polishing.

[0081] Step S302: Obtain macroscopic and microscopic morphologies based on all intermediate polishing morphologies.

[0082] Specifically, for surface defects, the surface can be polished and etched with a corresponding etchant to obtain the defect morphology characteristics. For example, the metallographic inspection etch method is implemented with reference to GB / T-13298-2015 "Methods for Metal Microstructure Inspection" or related standards. Afterwards, tools such as rulers, cameras, portable body mirrors, etc. are selected according to needs to inspect and record the distribution position, size, and macroscopic morphology characteristics of surface defects.

[0083] Specifically, step S301 may also include step S3010, step S3011 and step S3012.

[0084] Step S3010: grinding and polishing the surface defect according to a preset first grinding amount to obtain a polished surface of the surface defect, obtaining an intermediate polishing morphology on the polished surface, and judging whether the surface defect disappears.

[0085] Step S3011: When the surface defects disappear, stop polishing.

[0086] Step S3012: When the surface defect has not disappeared, repeatedly grind and polish the surface defect according to the first grinding amount until the surface defect disappears, and obtain a polished surface of the surface defect after each grinding and polishing, and obtain an intermediate polished morphology on the polished surface.

[0087] See also Figure 4 In one embodiment of the present invention, in step S40, the step of grinding and polishing the location of the internal defect and revealing the internal defect includes step S410.

[0088] Step S410: According to a preset second grinding amount, the position of the internal defect is repeatedly ground and polished to obtain a polished surface of the area to be inspected, and after each grinding and polishing, a magnetic particle detection method or a penetration detection method is used to detect the polished surface until the internal defect is revealed in the area to be inspected.

[0089] Specifically, based on the internal defect position recorded by ultrasonic testing, an angle grinder is used to grind layer by layer until the internal defect is exposed. In order to ensure that the internal defect is not polished away, the amount of each grinding should not be too large, and a penetrant / magnetic particle test can be performed after each grinding. If a defect is shown, it means that the internal defect has been exposed.

[0090] Specifically, step S410 may also include step S4101, step S4102 and step S4103.

[0091] Step S4101, grinding and polishing the position of the internal defect according to a preset second grinding amount to obtain a polished surface at the position of the internal defect, using a magnetic particle detection method or a penetration detection method to detect on the polished surface, and determine whether the position of the internal defect reveals an internal defect.

[0092] Step S4102: When the position of the internal defect reveals the internal defect, stop the detection.

[0093] Step S4103: When the location of the internal defect does not reveal the internal defect, repeatedly grind and polish the location of the internal defect according to the second grinding amount to obtain a polished surface at the location of the internal defect, and after each grinding and polishing, use a magnetic particle detection method or a penetration detection method to detect the polished surface until the internal defect is revealed at the location of the internal defect.

[0094] See also Figure 4 In one embodiment of the present invention, after the step of revealing internal defects in the area to be inspected in step S430, the method includes steps S440, S450 and S460.

[0095] Step S440: record the initial morphology of the internal defects.

[0096] Step S450: grinding and polishing the internal defects for multiple times according to the third grinding amount until the internal defects disappear, and obtaining an intermediate polishing morphology on the corresponding polishing surface after each grinding and polishing.

[0097] Step S460: Obtain macroscopic and microscopic morphologies based on all intermediate polishing morphologies.

[0098] Specifically, for internal defects, the surface can be polished and etched with a corresponding etchant to obtain the defect morphology characteristics. Afterwards, tools such as a ruler, camera, portable body mirror, etc. are selected according to needs to check and record the distribution position, size, and macroscopic morphology characteristics of the internal defects.

[0099] See also Figure 4 In one embodiment of the present invention, in step S30, the step of recording the macroscopic and microscopic morphologies of surface defects may include step S311, step S312 and step S313.

[0100] Step S311: Select a ruler, a camera, and a portable body mirror to detect surface defects and record the macroscopic morphological features of the surface defects.

[0101] Step S312: Based on the metallographic replication process, an optical microscope and / or a scanning electron microscope is selected to detect surface defects and record the microscopic morphological features of the surface defects.

[0102] Step S313: Integrate the macroscopic morphology features and the microscopic morphology features to obtain macroscopic and microscopic morphologies.

[0103] Specifically, the nature of the defect and the cause of the defect are comprehensively judged based on the macroscopic and microscopic features of the surface defects / internal defects, including the surface defects / internal defects, the corresponding distribution location, macroscopic morphology, microscopic morphology, microstructure, and material conditions. For example, for welding defects, it is necessary to confirm whether the defect is distributed in the weld or the heat-affected zone, whether the defect is a linear defect or a point defect, and the number and length of the defect, so as to judge the nature of the defect as a welding crack (including hot cracks, reheating cracks, cold cracks), lack of fusion, pores, or slag inclusion defects.

[0104] See also Figure 4 In one embodiment of the present invention, in step S40, the location of the internal defect is confirmed according to the internal detection information, and the location of the internal defect is polished and exposed, including step S401, step S402 and step S403.

[0105] Step S401: confirm the location of the internal defect according to the internal detection information, and compare the location of the surface defect with the location of the internal defect.

[0106] Step S402: When there is a surface defect outside the position of the internal defect, after recording the initial morphology and macroscopic and microscopic morphologies of the surface defect, the area to be inspected is polished to reveal the internal defect.

[0107] Step S403: When there is no corresponding surface defect outside the position of the internal defect, the area to be inspected is polished and the internal defect is exposed.

[0108] Specifically, if there is only a surface defect at a certain position in the area to be inspected, the initial morphology and polished morphology corresponding to the surface defect can be obtained, and the surface defect information can be obtained. If there is only an internal defect at a certain position in the area to be inspected, the polished morphology corresponding to the internal defect can be obtained, and the internal defect information can be obtained. If there are both surface defects and internal defects at a certain position in the area to be inspected, the surface defect information of the surface defect can be obtained first, and then the internal defect information of the internal defect can be obtained.

[0109] See also Figure 5 In one embodiment of the present invention, a nuclear power equipment defect detection system may be provided, including a camera 110, a detection unit 120, a grinding and polishing unit 130, and a processing unit 140.

[0110] Camera 110 is used to detect the surface of nuclear power equipment.

[0111] The detection unit 120 is used to detect the surface of the area to be detected by using a penetration detection method to obtain surface detection information; and to detect the interior of the area to be detected by using an ultrasonic detection method to obtain interior detection information.

[0112] The grinding and polishing unit 130 is used to grind and polish surface defects, and grind and polish the positions of internal defects to reveal the internal defects.

[0113] The processing unit 140 is used to screen out the area to be inspected with defect openings based on the detection of the surface of the nuclear power equipment by the camera 110; to confirm the location of the surface defect according to the surface detection information and record the initial morphology of the surface defect; to record the macroscopic and microscopic morphologies of the surface defect after the surface defect is polished by the polishing unit 130; and to integrate the initial morphology with the macroscopic and microscopic morphologies to obtain surface defect information.

[0114] The processing unit 140 is also used to confirm the location of the internal defect according to the internal detection information, and after the grinding and polishing unit 130 grinds and polishes the location of the internal defect and reveals the internal defect, record the macroscopic and microscopic morphologies of the internal defect to obtain the internal defect information.

[0115] The processing unit 140 is further configured to obtain defect information according to the surface defect information and / or the internal defect information.

[0116] In summary, the present invention discloses a method and system for detecting defects in nuclear power equipment, which can effectively measure, characterize and characterize the size, shape, distribution location and type of defects, and is helpful for analyzing the causes of defects. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0117] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A method for detecting defects in nuclear power equipment, characterized in that: The method comprises: Inspect the surface of nuclear power equipment to screen out areas with defect openings to be inspected; Using a penetration detection method to detect the surface of the area to be detected, and obtain surface detection information; using an ultrasonic detection method to detect the interior of the area to be detected, and obtain interior detection information; Confirming the location of the surface defect according to the surface detection information, and recording the initial morphology of the surface defect; grinding and polishing the surface defect, and recording the macroscopic and microscopic morphologies of the surface defect; integrating the initial morphology with the macroscopic and microscopic morphologies to obtain the surface defect information; confirming the location of the internal defect according to the internal detection information, grinding and polishing the location of the internal defect to reveal the internal defect, recording the macroscopic and microscopic morphologies of the internal defect, and obtaining the internal defect information; Defect information is obtained according to the surface defect information and / or the internal defect information.

2. The method for detecting defects in nuclear power equipment according to claim 1, characterized in that: The step of detecting the surface of the area to be detected by using a penetration detection method to obtain surface detection information includes: Detect the material of the area to be detected and determine the material information: When the material information is a non-magnetic material, a penetration detection method is used to detect the surface of the area to be detected to obtain surface detection information; When the material information is a magnetic material, a magnetic particle detection method or a penetration detection method is used to detect the surface of the area to be detected to obtain surface detection information.

3. The method for detecting defects in nuclear power equipment according to claim 1, characterized in that: The step of grinding and polishing the surface defects and recording the macroscopic and microscopic morphologies of the surface defects comprises: According to a preset first grinding amount, the surface defect is ground and polished for multiple times until the surface defect disappears, and after each grinding and polishing, an intermediate polishing morphology on the corresponding polishing surface is obtained; The macroscopic and microscopic morphologies are obtained based on all the intermediate polishing morphologies.

4. The method for detecting defects in nuclear power equipment according to claim 3, characterized in that: The step of grinding and polishing the surface defect multiple times according to a preset first grinding amount until the surface defect disappears, and obtaining an intermediate polishing morphology on the corresponding polishing surface after each grinding and polishing, comprises: According to a preset first grinding amount, the surface defect is ground and polished to obtain a polished surface of the surface defect, an intermediate polishing morphology is obtained on the polished surface, and it is determined whether the surface defect disappears: When the surface defects disappear, stop grinding; When the surface defect has not disappeared, the surface defect is repeatedly ground and polished according to the first grinding amount until the surface defect disappears, and after each grinding and polishing, a polished surface of the surface defect is obtained, and an intermediate polished morphology is obtained on the polished surface.

5. The method for detecting defects in nuclear power equipment according to claim 1, characterized in that: The step of grinding and polishing the position of the internal defect to reveal the internal defect comprises: According to the preset second grinding amount, the position of the internal defect is ground and polished multiple times to obtain a polished surface at the position of the internal defect, and after each grinding and polishing, the polished surface is inspected using a magnetic particle inspection method or a penetration inspection method until the internal defect is revealed at the position of the internal defect.

6. The method for detecting defects in nuclear power equipment according to claim 5, characterized in that: The step of grinding and polishing the position of the internal defect for multiple times according to the preset second grinding amount to obtain a polished surface at the position of the internal defect, and after each grinding and polishing, performing detection on the polished surface by using a magnetic particle detection method or a penetration detection method until the internal defect is revealed at the position of the internal defect comprises: The position of the internal defect is ground and polished according to a preset second grinding amount to obtain a polished surface at the position of the internal defect, and a magnetic particle detection method or a penetration detection method is used to detect the polished surface, and it is determined whether the position of the internal defect reveals the internal defect: When the position of the internal defect reveals the internal defect, stopping the detection; When the location of the internal defect does not reveal the internal defect, the location of the internal defect is repeatedly ground and polished according to the second grinding amount to obtain a polished surface at the location of the internal defect, and after each grinding and polishing, a magnetic particle detection method or a penetration detection method is used to detect the polished surface until the internal defect is revealed at the location of the internal defect.

7. The method for detecting defects in nuclear power equipment according to claim 5, characterized in that: After the step of revealing the internal defect in the area to be inspected, the method comprises: Recording the initial morphology of the internal defect; According to a preset third grinding amount, the internal defect is ground and polished for multiple times until the internal defect disappears, and after each grinding and polishing, an intermediate polishing morphology on the corresponding polishing surface is obtained; The macroscopic and microscopic morphologies are obtained based on all the intermediate polishing morphologies.

8. The method for detecting defects in nuclear power equipment according to claim 1, characterized in that: The step of recording the macroscopic and microscopic morphologies of the surface defects comprises: Detecting the surface defects and recording the macroscopic morphological features of the surface defects; Based on the metallographic replication process, metallographic detection is performed on the surface defects to record the microscopic morphological characteristics of the surface defects; The macroscopic morphological features and the microscopic morphological features are combined to obtain macroscopic and microscopic morphologies.

9. The method for detecting defects in nuclear power equipment according to claim 1, characterized in that: The step of confirming the location of the internal defect according to the internal detection information, grinding and polishing the location of the internal defect to reveal the internal defect comprises: Confirm the location of the internal defect according to the internal detection information, and compare the location of the surface defect with the location of the internal defect: When the surface defect corresponds to the outside of the position of the internal defect, after recording the initial morphology and the macroscopic and microscopic morphologies of the surface defect, the area to be inspected is polished and the internal defect is revealed; When the outer side of the position of the internal defect does not correspond to the surface defect, the area to be inspected is polished and the internal defect is exposed.

10. A nuclear power equipment defect detection system, characterized in that: The system comprises: Cameras are used to inspect the surface of nuclear power equipment; A detection unit, used to detect the surface of the area to be detected by using a penetration detection method to obtain surface detection information; and to detect the interior of the area to be detected by using an ultrasonic detection method to obtain interior detection information; A grinding and polishing unit, used for grinding and polishing the surface defects, and grinding and polishing the positions of the internal defects to reveal the internal defects; A processing unit, used to screen out the area to be inspected with defect openings based on the detection of the surface of the nuclear power equipment by the camera; used to confirm the position of the surface defect according to the surface detection information and record the initial morphology of the surface defect; used to record the macroscopic and microscopic morphologies of the surface defect after the surface defect is polished by the polishing unit; used to integrate the initial morphology with the macroscopic and microscopic morphologies to obtain the surface defect information; The processing unit is further used to confirm the position of the internal defect according to the internal detection information, and after the grinding and polishing unit grinds and polishes the position of the internal defect and reveals the internal defect, record the macroscopic and microscopic morphologies of the internal defect to obtain the internal defect information; The processing unit is further configured to obtain defect information according to the surface defect information and / or the internal defect information.

Images