Nuclear power plant BOSS head cladding repair test method, computer equipment and storage medium

Abstract

The present invention belongs to the field of maintenance optimization technology and discloses a nuclear power plant BOSS head cladding repair test method, computer equipment, and storage medium. The method receives a cladding repair instruction for cladding repairing a nuclear power plant BOSS head; performs cladding operations of the cladding repair category corresponding to the cladding repair set on different first BOSS head simulated pipe fittings using each set of cladding repair conditions in the cladding repair set, and records all sets of cladding repair conditions that meet the cladding repair target as cladding category parameters corresponding to the cladding repair category; determines cladding repair parameters based on the cladding category parameters corresponding to each cladding repair category; performs a cladding verification operation on a second BOSS head simulated pipe fitting based on the cladding repair parameters to obtain a cladding verification result corresponding to the cladding repair parameter; and determines target cladding repair parameters corresponding to the nuclear power plant BOSS head based on the cladding verification result. The present invention improves the safety and efficiency of BOSS head cladding repair.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power plant maintenance optimization, and in particular to a nuclear power plant BOSS head surfacing welding repair test method, computer equipment and storage medium. Background Art

[0002] At present, a large number of BOSS heads (special nozzle sockets for nuclear power plants) are used in nuclear power plants for reinforcing transition designs. The branch pipes and the main pipes of the BOSS heads are fully welded with fillet welds. Such welds are easily affected by temperature or external pressure, and thus are prone to failure and leakage during the operation of nuclear power plant equipment, reducing the safety of nuclear power plant equipment operation.

[0003] In the existing technology, BOSS head weld leakage is often repaired through manual repair. However, since the BOSS head is often installed in the main circuit and secondary and tertiary component piping systems of nuclear power plants, and the primary circuit system contains radioactive media, the leakage of radioactive media will make the BOSS head maintenance more difficult and the risk of contamination is high, which in turn leads to low BOSS head maintenance efficiency and low safety for maintenance personnel during the maintenance process. Summary of the Invention

[0004] The embodiments of the present invention provide a nuclear power plant BOSS head surfacing welding repair test method, computer equipment and storage medium to solve the problems of low repair efficiency and low repair safety of the BOSS head.

[0005] A nuclear power plant BOSS head surfacing welding repair test method, comprising:

[0006] Receive a surfacing repair instruction for performing surfacing repair on a BOSS head of a nuclear power plant; the surfacing repair instruction includes multiple surfacing repair categories and surfacing repair sets corresponding to each of the surfacing repair categories; each surfacing repair set includes a surfacing repair target and at least one set of surfacing repair conditions corresponding to the surfacing repair target; the BOSS head of the nuclear power plant includes a main pipe and a branch pipe connected to the main pipe at a preset angle;

[0007] Using each set of the surfacing repair conditions in a surfacing repair set, surfacing operations of the surfacing repair category corresponding to the surfacing repair set are performed on different first BOSS head simulated pipe fittings, and all sets of the surfacing repair conditions that meet the surfacing repair target are recorded as surfacing category parameters corresponding to the surfacing repair category; all the first BOSS head simulated pipe fittings are consistent with the size and material of the nuclear power plant BOSS head;

[0008] Determining surfacing repair parameters according to the surfacing type parameters corresponding to each surfacing repair type;

[0009] Performing a surfacing verification operation on the second BOSS head simulated pipe fitting according to the surfacing repair parameters to obtain a surfacing verification result corresponding to the surfacing repair parameters; all the second BOSS head simulated pipe fittings are consistent in size and material with the nuclear power plant BOSS head;

[0010] According to the surfacing verification result, target surfacing repair parameters corresponding to the BOSS head of the nuclear power plant are determined.

[0011] A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned nuclear power plant BOSS head surfacing welding repair test method is implemented.

[0012] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the above-mentioned nuclear power plant BOSS head surfacing welding repair test method.

[0013] The above-mentioned nuclear power plant BOSS head surfacing repair test method, computer equipment and storage medium, through multiple surfacing repair categories and surfacing repair sets corresponding to each of the surfacing repair categories, through each group of the surfacing repair conditions in a surfacing repair set, respectively perform surfacing operations of the surfacing repair category corresponding to the surfacing repair set on different first BOSS head simulation pipe fittings, and determine surfacing repair parameters according to the surfacing category parameters corresponding to each of the surfacing repair categories; perform surfacing verification operations on the second BOSS head simulation pipe fittings according to the surfacing repair parameters, and obtain surfacing verification results corresponding to the surfacing repair parameters; determine the target surfacing repair parameters corresponding to the nuclear power plant BOSS head according to the surfacing verification results, which can improve the accuracy and efficiency of BOSS head surfacing repair, and can replace manual repair methods to improve the safety of BOSS head surfacing repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 Schematic diagram of an application environment of a nuclear power plant BOSS head cladding repair test method according to an embodiment of the present invention;

[0016] Figure 2 This is a flow chart of a nuclear power plant BOSS head cladding repair test method according to one embodiment of the present invention;

[0017] Figure 3 is a schematic diagram of the cross-sectional structure of a first BOSS head simulated pipe after performing a surfacing operation corresponding to the defect-free BOSS head repair category in one embodiment of the present invention;

[0018] Figure 4 FIG. 1 is a schematic diagram of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] The embodiment of the present invention provides a nuclear power plant BOSS head cladding repair test method, which can be applied as follows: Figure 1 Specifically, the nuclear power plant BOSS head cladding repair test method is applied in a nuclear power plant BOSS head cladding repair test system, and the nuclear power plant BOSS head cladding repair test system includes: Figure 1 The client and server shown communicate over a network to address the issues of low BOSS head repair efficiency and security. The client, also known as the user end, is the program that corresponds to the server and provides local services to clients. The client can be installed on, but is not limited to, various personal computers, laptops, smartphones, tablets, and portable wearable devices. The server can be implemented as a standalone server or a server cluster consisting of multiple servers.

[0021] In one embodiment, if Figure 2 As shown, a nuclear power plant BOSS head surfacing repair test method is provided, and this method is applied in Figure 1 The server in the example is used as an example, and the steps are as follows:

[0022] S10: Receive a surfacing repair instruction for surfacing repairing a BOSS head of a nuclear power plant; the surfacing repair instruction includes multiple surfacing repair categories and surfacing repair sets corresponding to each surfacing repair category; each surfacing repair set includes a surfacing repair target and at least one set of surfacing repair conditions corresponding to the surfacing repair target; the BOSS head of the nuclear power plant includes a main pipe and a branch pipe connected to the main pipe at a preset angle;

[0023] Understandably, cladding repair instructions can be sent by nuclear power plant staff or automatically generated when staff enter repair information for the nuclear power plant's BOSS head. Cladding repair categories include welding material comparison, critical surface cladding, non-defective BOSS head repair, and defective BOSS head repair. The welding material comparison category is used to determine suitable cladding repair materials; the critical surface cladding category is used to determine the optimal parameters for cladding repair on a predetermined surface of a nuclear power plant's BOSS head; the non-defective BOSS head repair category is used to determine the optimal parameters for cladding repair on a nuclear power plant's BOSS head; and the defective BOSS head repair category is used to determine the optimal parameters for cladding repair on a defective nuclear power plant's BOSS head. Cladding repair targets refer to the repair objectives for cladding repair of nuclear power plant BOSS heads for different cladding repair categories. For example, cladding repair targets can be reflected in, for example, weld seams and leakage indicators. Cladding repair conditions refer to the different preset cladding repair parameters for different cladding repair categories, such as those without water, with water, or with water and pressure.

[0024] Furthermore, the BOSS head of the nuclear power plant includes a main pipe and a branch pipe connected to the main pipe at a preset angle, and the central axis of the main pipe and the central axis of the branch pipe are in the same plane, and the preset angle is an acute angle or a right angle; the preset surface of the BOSS head of the nuclear power plant is the surface at the intersection of the main pipe and the branch pipe.

[0025] S20: performing surfacing operations of the surfacing repair category corresponding to the surfacing repair set on different first BOSS head simulated pipe fittings using each set of the surfacing repair conditions in the surfacing repair set, and recording all sets of the surfacing repair conditions that meet the surfacing repair target as surfacing category parameters corresponding to the surfacing repair category; all first BOSS head simulated pipe fittings are consistent with the size and material of the nuclear power plant BOSS head;

[0026] It can be understood that the simulated pipe fittings refer to pipe fittings that simulate different repair conditions of the BOSS head of a nuclear power plant. For example, the simulated pipe fittings can simulate normal BOSS heads of nuclear power plants (i.e., BOSS heads without defects) or simulate BOSS heads with defects. In this embodiment, through each set of surfacing repair conditions in a surfacing repair set, surfacing operations of the surfacing repair category corresponding to the surfacing repair set are performed on different first BOSS simulated pipe fittings, and all sets of the surfacing repair conditions that meet the surfacing repair target are recorded as surfacing category parameters corresponding to the surfacing repair category, that is, each BOSS head simulated pipe fitting is subjected to a surfacing operation through a set of the surfacing repair conditions and obtains a surfacing category parameter.

[0027] S30: determining a surfacing repair parameter according to the surfacing type parameters corresponding to each surfacing repair type;

[0028] It can be understood that in step S20, for each surfacing repair category, a surfacing repair category parameter corresponding to the surfacing repair category is determined, and then the surfacing repair parameters can be generated according to each surfacing repair category parameter, for example, by integrating the surfacing repair category parameters.

[0029] S40: performing a surfacing verification operation on the second BOSS head simulated pipe fitting according to the surfacing repair parameters to obtain a surfacing verification result corresponding to the surfacing repair parameters; all the second BOSS head simulated pipe fittings are consistent in size and material with the nuclear power plant BOSS head;

[0030] It can be understood that, through each group of the surfacing repair conditions in a surfacing repair set, the surfacing operations of the surfacing repair category corresponding to the surfacing repair set are performed on different first BOSS head simulation pipes, and all groups of the surfacing repair conditions that meet the surfacing repair target are recorded as surfacing category parameters corresponding to the surfacing repair category, and after the surfacing repair parameters are determined according to the surfacing category parameters corresponding to each of the surfacing repair categories, the surfacing repair parameters need to be verified to determine the effect of the surfacing repair of the nuclear power plant BOSS head through the surfacing repair parameters, such as whether the weld meets the requirements, whether there is leakage, the welding speed, etc.

[0031] S50: Determine target surfacing welding repair parameters corresponding to the BOSS head of the nuclear power plant according to the surfacing welding verification result.

[0032] It can be understood that after the surfacing verification operation is performed on the second BOSS head simulation pipe according to the surfacing repair parameters and the surfacing verification results corresponding to the surfacing repair parameters are obtained, the surfacing verification results are mainly analysis of the composition, metallography, hardness and mechanical properties, etc. Therefore, it is also necessary to verify the feasibility and reliability of repairing the nuclear power plant BOSS head through surfacing repair parameters under water and pressure conditions by designing a comprehensive test bench, that is, to make a final judgment by simulating the actual site of the nuclear power plant, and then after the feasibility and reliability are successfully verified, the surfacing repair parameters can be determined as the target repair parameters for surfacing repair of the nuclear power plant BOSS head. At this time, the surfacing repair test of the nuclear power plant BOSS head is completed.

[0033] In this embodiment, through multiple surfacing repair categories and surfacing repair sets corresponding to each of the surfacing repair categories, and through each group of the surfacing repair conditions in a surfacing repair set, surfacing operations of the surfacing repair categories corresponding to the surfacing repair set are performed on different first BOSS head simulation pipe fittings, and surfacing repair parameters are determined according to the surfacing category parameters corresponding to each of the surfacing repair categories; surfacing verification operations are performed on the second BOSS head simulation pipe fitting according to the surfacing repair parameters to obtain surfacing verification results corresponding to the surfacing repair parameters; and based on the surfacing verification results, target surfacing repair parameters corresponding to the nuclear power plant BOSS head are determined, which can improve the accuracy and efficiency of the BOSS head surfacing repair, and can replace manual repair methods to improve the safety of the BOSS head surfacing repair.

[0034] In one embodiment, the surfacing repair category includes a welding material comparison category; the surfacing repair target corresponding to the welding material comparison category is a surfacing material target; the surfacing repair condition corresponding to the surfacing material target is a preset surfacing material; the surfacing category parameter includes a surfacing material parameter;

[0035] Understandably, the welding material comparison category is used to determine suitable cladding repair materials for cladding repairs; the cladding material target refers to determining welding materials suitable for on-site cladding repairs of nuclear power plant BOSS heads. The cladding material target can be assessed through metallographic testing, hardness testing, tensile testing, impact testing, and bend testing. Preset cladding materials include ER70S-6 (copper-plated low-alloy steel gas shielded welding wire), ERNiCr-3 (nickel-based alloy welding wire), and ER309L (stainless steel welding wire) + ER316L (stainless steel welding wire). When ER316L is the preset cladding material, ER309L must be clad first as a transition layer, followed by ER316L cladding.

[0036] The method further comprises: performing surfacing operations of the surfacing repair category corresponding to the surfacing repair set on different first BOSS head simulated pipe fittings through each group of the surfacing repair conditions in the surfacing repair set, and recording all groups of the surfacing repair conditions that meet the surfacing repair target as surfacing category parameters corresponding to the surfacing repair category, including:

[0037] Prefabricate the first BOSS head simulated pipe fitting according to the preset surfacing material to obtain a surfacing material pipe fitting;

[0038] It is understandable that in this embodiment, it is necessary to select surfacing materials suitable for surfacing repair. Therefore, the first BOSS head simulation pipe fitting can be prefabricated according to different preset surfacing materials to obtain surfacing material pipe fittings corresponding to each preset surfacing material.

[0039] Performing a surfacing operation corresponding to the comparison category of the welding material on the surfacing material pipe fitting to obtain a surfacing material pipe fitting repaired by surfacing welding;

[0040] Specifically, after prefabricating the first BOSS head simulated pipe fitting according to the preset hardfacing material to obtain the hardfacing material pipe fitting, a hardfacing operation corresponding to the welding material comparison category is performed on each hardfacing material pipe fitting. That is, the same hardfacing operation is performed on different hardfacing material pipe fittings, such as hardfacing operations performed on different hardfacing material pipe fittings using the same hardfacing parameters, thereby obtaining hardfacing material results corresponding to each preset hardfacing material. It should be noted that when hardfacing operations are performed on each hardfacing material pipe fitting, the hardfacing operation can be performed using a preset hardfacing equipment, and the welding speed of the preset hardfacing equipment during welding can be set according to each preset hardfacing material. For example, the welding speed for ER309L+ER316L can be set to be greater than ERNiCr-3, and the welding speed for ERNiCr-3 can be set to be greater than ER70S-6.

[0041] The cladding material pipe fittings after cladding repair are verified to obtain a material pipe fitting verification result, and cladding material parameters that meet the cladding material target are determined based on the material pipe fitting verification result.

[0042] Specifically, after performing a surfacing operation corresponding to the welding material comparison category on the surfacing material pipe fitting to obtain the surfacing material pipe fitting after surfacing welding repair, the surfacing material pipe fitting after surfacing welding repair is subjected to material pipe fitting verification, for example, metallographic inspection, hardness inspection, tensile inspection, impact inspection, bending inspection, etc. are performed on the surfacing material pipe fitting after surfacing welding repair, thereby obtaining a material pipe fitting verification result, and determining the surfacing material parameters that meet the surfacing material target based on the material pipe fitting verification result.

[0043] For example, metallographic inspection is performed on the cladding material pipe fittings after cladding repair by metallographic inspection equipment. The metallographic inspection results show that the cladding material pipe fittings after cladding repair of ER70S-6 have pores, the cladding material pipe fittings after cladding repair of ERNiCr-3 have pores and are not fused, and the cladding material pipe fittings after cladding repair of ER309L+ER316L have pores and are not fused; the cladding material pipe fittings after cladding repair of ER70S-6 have the highest hardness, and the cladding material pipe fittings after cladding repair of ER309L+ER316L have the lowest hardness; the weld seam of the cladding material pipe fittings after cladding repair of ER70S-6 is the largest, and the weld seam of ERNiCr-3 is the largest. The weld seam of the cladding material pipe fittings after cladding repair of 309L+ER316L is the smallest; the heat affected zone of the cladding material pipe fittings after cladding repair of ER309L+ER316L is the widest; the heat affected zone of the cladding material pipe fittings after cladding repair of ER70S-6 is the narrowest; the cladding material pipe fittings after cladding repair of ER70S-6 have no cracks; the cladding material pipe fittings after cladding repair of ER309L+ER316L and the cladding material pipe fittings after cladding repair of ERNiCr-3 both have cracks, so ER70S-6 is the most suitable welding material for the cladding repair parameters, that is, the cladding material parameters are determined to be ER70S-6.

[0044] In one embodiment, the surfacing repair category includes a key surface surfacing category; the surfacing repair target corresponding to the key surface surfacing category is a pipe surface target; the surfacing repair condition corresponding to the pipe surface target includes multiple pipe surface parameter sets; one pipe surface parameter set includes multiple groups of pipe surface surfacing parameters; each group of pipe surface surfacing parameters in the same pipe surface parameter set includes at least one identical fixed repair parameter and at least one different variable repair parameter; and the variable repair parameters in different pipe surface parameter sets are different; the surfacing repair parameters include pipe surface parameters;

[0045] The method further comprises: performing surfacing operations of the surfacing repair category corresponding to the surfacing repair set on different first BOSS head simulated pipe fittings through each group of the surfacing repair conditions in the surfacing repair set, and recording all groups of the surfacing repair conditions that meet the surfacing repair target as surfacing category parameters corresponding to the surfacing repair category, including:

[0046] Performing a surfacing operation on the simulated surface of the first BOSS head simulated pipe according to the pipe surface surfacing parameters to obtain a surfacing surface result corresponding to the pipe surface condition; the simulated surface refers to a surface on the first BOSS head simulated pipe that is consistent in size and material with a preset surface of the nuclear power plant BOSS head; the preset surface refers to the surface at the junction of the main pipe and the branch pipe;

[0047] Among them, the surface surfacing parameters of the pipe fittings include but are not limited to interpass temperature, welding method, internal medium and welding speed; further, the interpass temperature ranges from 50°C to 250°C; the welding method includes drag welding and swing welding; the internal medium includes anhydrous medium and aqueous medium; the welding speed ranges from 20mm / min to 40mm / min.

[0048] It can be understood that the simulated surface is the surface on the first BOSS head simulated pipe that is consistent with the size and material of the preset surface, that is, the first BOSS head simulated pipe is the same as the nuclear power plant BOSS head, and the first BOSS head simulated pipe is also provided with a simulated mother pipe and a simulated branch pipe connected to the simulated mother pipe at a preset angle. The simulated surface is the surface at the intersection of the simulated mother pipe and the simulated branch pipe, thereby making the simulated surface the same as the preset surface of the BOSS head, thereby improving the accuracy of the nuclear power plant BOSS head surfacing repair test. Furthermore, in this embodiment, multiple BOSS head simulated pipes are provided, and each first BOSS head simulated pipe is subjected to a surfacing operation through a set of pipe surface surfacing parameters and obtains a surfacing surface result. Among them, the base material of the simulated surface of the first BOSS head simulated pipe can be a stainless steel base material or a carbon steel base material.

[0049] Furthermore, the variable repair parameters in the pipe surface parameter set are all different. For example, assuming that the variable repair parameter in one of the pipe surface parameter sets is the interpass temperature, the interpass temperature of each pipe surface cladding parameter in this pipe surface parameter set is different, and the variable repair parameters in other pipe surface parameter sets are not the interpass temperature, but may be the welding method, internal medium, or welding speed. Furthermore, the variable repair parameters in the pipe surface parameter set can also be a combination of two parameters, such as the welding method and the internal medium. That is, the fixed repair parameter and the variable repair parameter in a pipe surface parameter set are both at least one of the interpass temperature, welding method, internal medium, and welding speed; and the fixed repair parameters and variable repair parameters in the same set of pipe surface cladding parameters are different.

[0050] Furthermore, in this embodiment, the surfacing operation on the simulated surface can be performed by the following method: according to the surface surfacing parameters of the pipe fitting, controlling the preset surfacing processing equipment to weld the electrode base layer on the simulated surface; controlling the preset surfacing processing equipment to weld the machined layer on the electrode base layer; the size of the machined layer is a second preset length and a second preset width; controlling the preset surfacing processing equipment to weld the wire surfacing layer on the machined layer; the size of the wire surfacing layer is a third preset length and a third preset width; arranging multiple metallographic observation devices on the wire surfacing layer, and determining the surfacing surface result by the metallographic observation equipment.

[0051] Determining optimal repair parameters from all the surfacing surface results corresponding to the same pipe surface parameter set; the optimal repair parameters are parameters that correspond to the variable repair parameters of the pipe surface parameter set and meet the pipe surface target;

[0052] It can be understood that the optimal repair parameter refers to the best surfacing repair effect of the preset surface of the BOSS head under the optimal repair parameter. The optimal repair parameter can be determined based on the maximum weld penetration of the first layer in the results of each surfacing surface, that is, the surfacing parameter of the pipe surface whose maximum weld penetration of the first layer meets the surfacing requirements (for example, the maximum weld penetration of the first layer is less than or equal to 1.11m, etc.) can be regarded as the optimal repair parameter. Among them, the maximum weld penetration of the first layer refers to the maximum weld depth of the simulated surface of the first surfacing layer welded on the simulated surface and the base material of the BOSS head simulated pipe (such as the stainless steel base material or carbon steel base material indicated in the above description).

[0053] For example, when the interpass temperature is 50°C, the corresponding maximum penetration value is 1.00mm; when the interpass temperature is 250°C, the corresponding maximum penetration value is 1.53mm; if the preset penetration threshold set for the surfacing requirement is set to 1.11mm, 50°C is recorded as the optimal repair parameter corresponding to the interpass temperature. For example, assuming that the maximum penetration value is 0.89mm when the welding method is drag welding, and the maximum penetration value is 1.11mm when the welding method is oscillating welding, it indicates that the surfacing repair effect using the drag welding method is better, and the drag welding method is recorded as the optimal repair parameter of the welding method. For example, assuming that the internal medium is an aqueous medium and the welding method is drag welding, the corresponding maximum penetration value is 0.89mm, and the internal medium is an anhydrous medium and the welding method is oscillating welding, the corresponding maximum penetration value is 1.11mm, etc., then it can be determined that the internal medium is an aqueous medium and the welding method is drag welding as the optimal repair parameter. For example, when the welding speed is 20 mm / min, the corresponding maximum penetration value is 1.02 mm; when the welding speed is 40 mm / min, the corresponding maximum penetration value is 0.73 mm; if the preset penetration threshold is set to 1.00 mm, 40 mm / min is recorded as the optimal repair parameter corresponding to the welding speed.

[0054] The pipe surface parameters are determined according to the optimal repair parameters corresponding to each pipe surface parameter set.

[0055] Specifically, after determining the optimal repair parameters from all the surfacing surface results corresponding to the same pipe surface parameter set, the optimal value of each variable repair parameter in the pipe surface parameter set can be determined, and then the pipe surface parameters can be determined based on the optimal repair parameters corresponding to each pipe surface parameter set, so that the pipe surface parameters can be used as parameters for surfacing repair of the preset surface of the BOSS head of the nuclear power plant, thereby making the accuracy and efficiency of the surfacing repair of the BOSS head of the nuclear power plant higher.

[0056] In one embodiment, the surfacing welding repair category includes a defect-free BOSS head repair category; the surfacing welding repair target corresponding to the defect-free BOSS head repair category includes a defect-free repair target; the surfacing welding repair conditions corresponding to the defect-free repair target include a water-free condition and a water-and-pressure condition; and the surfacing welding repair parameters include defect-free surfacing welding parameters.

[0057] It can be understood that the defect-free BOSS head repair category is used to determine the optimal parameters when performing cladding repair on the BOSS head of a nuclear power plant; the water-free condition means that no water medium is injected into the simulated pipe fitting, and the water-with-pressure condition means that water medium is injected into the simulated pipe fitting and pressure is applied.

[0058] The method further comprises: performing surfacing operations of the surfacing repair category corresponding to the surfacing repair set on different first BOSS head simulated pipe fittings through each group of the surfacing repair conditions in the surfacing repair set, and recording all groups of the surfacing repair conditions that meet the surfacing repair target as surfacing category parameters corresponding to the surfacing repair category, including:

[0059] Acquire waterless surfacing welding parameters corresponding to the waterless condition, and water- and pressure-containing surfacing welding parameters corresponding to the water- and pressure-containing condition;

[0060] It is understandable that in addition to the anhydrous conditions, the parameters for waterless cladding also require the settings of parameters such as maximum welding current, welding speed, maximum heat input, and interpass temperature. Similarly, in addition to the water-and-pressure conditions, the parameters for water-and-pressure cladding also require the settings of parameters such as welding current, welding speed, maximum heat input, and interpass temperature. Due to the differences between anhydrous conditions and water-and-pressure conditions, a small deviation (e.g., a current deviation of less than 5A) is allowed when setting the maximum welding current.

[0061] Performing a surfacing operation corresponding to the defect-free BOSS head repair category on the first BOSS head simulated pipe fitting according to the waterless surfacing parameters to obtain a waterless surfacing result; and simultaneously performing a surfacing operation corresponding to the defect-free BOSS head repair category on the first BOSS head simulated pipe fitting according to the water- and pressure-based surfacing parameters to obtain a water- and pressure-based surfacing result;

[0062] Specifically, after obtaining the waterless surfacing parameters corresponding to the waterless conditions and the water- and pressure-containing surfacing parameters corresponding to the water- and pressure-containing conditions, the first BOSS head simulation pipe fitting is subjected to a surfacing operation corresponding to the defect-free BOSS head repair category according to the waterless surfacing parameters to obtain a waterless surfacing result; at the same time, the first BOSS head simulation pipe fitting is subjected to a surfacing operation corresponding to the defect-free BOSS head repair category according to the water- and pressure-containing surfacing parameters to obtain a water- and pressure-containing surfacing result. The waterless surfacing result is the first BOSS head simulation pipe fitting after surfacing repair according to the waterless surfacing parameters. The water- and pressure-containing surfacing result is the first BOSS head simulation pipe fitting after surfacing repair according to the water- and pressure-containing surfacing parameters. It can be understood that in this embodiment, surfacing repair is performed on the first BOSS head simulation pipe fitting without defects.

[0063] Determine defect-free surfacing parameters that meet the defect-free repair goal based on the waterless surfacing result and the water- and pressure-containing surfacing result.

[0064] Specifically, after performing a surfacing operation corresponding to the defect-free BOSS head repair category on the first BOSS head simulated pipe fitting according to the waterless surfacing parameters, a waterless surfacing result is obtained; at the same time, performing a surfacing operation corresponding to the defect-free BOSS head repair category on the first BOSS head simulated pipe fitting according to the water- and pressure-bearing surfacing parameters to obtain a water- and pressure-bearing surfacing result, the leakage test indicators and defect display indicators of the waterless surfacing result and the water- and pressure-bearing surfacing result can be determined by visual non-destructive testing and color penetrant non-destructive testing, and metallographic testing can also be used to determine whether abnormal oxidation, cracks, etc. occur on the inner surface of the pipe of the simulated pipe fitting in the waterless surfacing result and the water- and pressure-bearing surfacing result. After the visual non-destructive testing, color penetrant non-destructive testing, and metallographic testing are all passed, it can be determined that the waterless surfacing parameters and the water- and pressure-bearing surfacing parameters meet the defect-free repair target, and the waterless surfacing parameters and the water- and pressure-bearing surfacing parameters are recorded as defect-free surfacing parameters.

[0065] In one embodiment, the surfacing welding repair category includes a defective BOSS head repair category; the surfacing welding repair target corresponding to the defective BOSS head repair category includes a defect repair target; the surfacing welding repair conditions corresponding to the defect repair target include water and pressure conditions and defect repair parameters; the defect repair parameters are used to perform surfacing welding repair on four defects existing on the BOSS head of a nuclear power plant; the surfacing welding repair parameters include defective surfacing welding parameters;

[0066] like Figure 3 As shown, the BOSS head of a nuclear power plant includes a main pipe 11 and a branch pipe 12 connected to the main pipe 11 at a preset angle; four defects (such as Figure 3 The defects 13) are respectively arranged at the 0 degree position, 90 degree position, 180 degree position and 270 degree position corresponding to the weld area of ​​the main pipe 11 and the branch pipe 12; wherein, the BOSS head of the nuclear power plant in the present invention is a reinforced transition design, the welding form between the branch pipe 12 and the main pipe 11 is a placement welding, and the weld between the branch pipe 12 and the main pipe 11 is a full penetration fillet weld.

[0067] The method further comprises: performing surfacing operations of the surfacing repair category corresponding to the surfacing repair set on different first BOSS head simulated pipe fittings through each group of the surfacing repair conditions in the surfacing repair set, and recording all groups of the surfacing repair conditions that meet the surfacing repair target as surfacing category parameters corresponding to the surfacing repair category, including:

[0068] Acquire defect data corresponding to four defects on the BOSS head of the nuclear power plant, and prefabricate the first BOSS head simulated pipe fitting according to the defect data to obtain a simulated pipe fitting with defects;

[0069] Understandably, defect data refers to the location information and preset diameters of the four defects set on the nuclear power plant's BOSS. For example, the location information indicates that the four defects are located at the 0-degree, 90-degree, 180-degree, and 270-degree positions corresponding to the weld areas of the main pipe 11 and branch pipe 12, respectively. The defects are through-holes of a preset diameter, which can be set to 6 mm. In this embodiment, the four through-holes are sealed with four thin plates of a preset thickness, which can be set to 2 mm.

[0070] Furthermore, after obtaining the defect data corresponding to the four defects existing on the BOSS head of the nuclear power plant, the defect data can be simulated on the first BOSS head simulation pipe fitting according to the defect data, that is, the first BOSS head simulation pipe fitting is prefabricated according to the defect data, and then a defective simulation pipe fitting is obtained.

[0071] Performing a surfacing operation corresponding to the defective BOSS head repair category on the weld area of ​​the defective simulated pipe fitting according to the surfacing repair data to obtain a repaired BOSS head simulated pipe fitting;

[0072] Among them, the surfacing welding repair data includes: the number of surfacing welding layers and the water-pressure surfacing welding parameters corresponding to each of the said surfacing welding layers; the said water-pressure surfacing welding parameters include but are not limited to welding material parameters, power supply polarity, welding current parameters, pulse frequency, duty cycle, tungsten electrode diameter, arc voltage, welding speed, maximum heat input and interlayer temperature, etc.

[0073] When the number of surfacing layers is the first layer, the water- and pressure-resistant surfacing parameters corresponding to the first layer include: the welding material diameter in the welding material parameters is 1.6 mm; the power supply polarity is reverse DC; the peak value of the welding current parameter is 90 V, and the base value is 70 A; the pulse frequency is 2.0 Hz; the duty cycle is 60%; the tungsten electrode diameter is 2.4; the arc voltage is 9 to 12 V; the welding speed is 32 to 71 mm / min; the maximum heat input is 1400 J / mm; and the interlayer temperature is less than or equal to 100°C.

[0074] When the number of surfacing layers is the second layer, the water- and pressure-resistant surfacing parameters corresponding to the second layer include: the welding material diameter in the welding material parameters is 1.6 mm; the power supply polarity is reverse DC; the peak value of the welding current parameter is 100 V, and the base value is 75 A; the pulse frequency is 2.0 Hz; the duty cycle is 60%; the tungsten electrode diameter is 2.4; the arc voltage is 9 to 12 V; the welding speed is 32 to 54 mm / min; the maximum heat input is 1800 J / mm; and the interlayer temperature is less than or equal to 100°C.

[0075] When the number of surfacing layers is one of the third to fifth layers, the corresponding water- and pressure-resistant surfacing parameters include: the welding material diameter in the welding material parameters is 1.6 mm; the power supply polarity is reverse DC; the peak value of the welding current parameter is 100 V, and the base value is 75 A; the pulse frequency is 2.0 Hz; the duty cycle is 60%; the tungsten electrode diameter is 2.4; the arc voltage is 9 to 12 V; the welding speed is 20 to 60 mm / min; the maximum heat input is 2000 J / mm; and the interlayer temperature is less than or equal to 100°C.

[0076] When the number of surfacing layers is one of the sixth to seventh layers, the corresponding water- and pressure-resistant surfacing parameters include: the welding material diameter in the welding material parameters is 1.6 mm; the power supply polarity is reverse DC; the peak value of the welding current parameter is 105 V, and the base value is 85 A; the pulse frequency is 2.0 Hz; the duty cycle is 60%; the tungsten electrode diameter is 2.4; the arc voltage is 9 to 12 V; the welding speed is 20 to 60 mm / min; the maximum heat input is 2200 J / mm; and the interlayer temperature is less than or equal to 100°C.

[0077] Determine the leakage index of the repaired BOSS head simulated pipe fitting; further, the determining the leakage index of the repaired BOSS head simulated pipe fitting includes:

[0078] The first leakage test index of the repaired BOSS head simulation pipe fitting is determined by visual non-destructive testing and color penetrant non-destructive testing; wherein, the first leakage test index includes but is not limited to a water-and-pressure leakage index (the water-and-pressure leakage index includes leakage and no leakage); for example, the first leakage test index may also include an external defect display index (the external defect display index includes no defect display and defect display), an inner surface metal slag index (the inner surface metal slag index includes the presence of slag on the inner surface metal or the absence of slag), etc.

[0079] The second leakage test index of the repaired BOSS head simulation pipe fitting is determined by metallographic testing; the second leakage test index includes but is not limited to the cross-sectional metallographic crack index (the cross-sectional metallographic crack index includes no crack extension in the cross-sectional metallographic and crack extension in the cross-sectional metallographic). For example, the second leakage test index also includes the weld fusion index (the weld fusion index includes good weld fusion and poor weld fusion), the hardening index (the hardening index includes no hardened structure and the presence of hardened structure), the oxidation index (including no abnormal oxidation on the inner surface of the pipe or abnormal oxidation on the inner surface of the pipe), etc. It is understandable that the above-mentioned visual non-destructive testing, color penetrant non-destructive testing and metallographic testing techniques are all technologies known to those skilled in the art and will not be repeated here.

[0080] The leakage index is determined based on the first leakage test index and the second leakage test index. That is, the leakage index is generated based on the first leakage test index and the second leakage test index, and includes at least two indicators: a water-under-pressure leakage index (the water-under-pressure leakage index includes leakage and no leakage) and a cross-sectional metallographic crack index (the cross-sectional metallographic crack index includes no crack propagation in the cross-sectional metallographic image and crack propagation in the cross-sectional metallographic image). In the present invention, the leakage index can also be set as required to be composed of other indicators in the first leakage test index and the second leakage test index, and other indicators that may be related to leakage can also be added. For example, the leakage index can be set to also include a penetration index (when the leakage index includes the penetration index, the leakage result can be considered as no leakage only when the penetration index also satisfies the requirement of less than 1.1 mm); the leakage index can also be set to also include a deformation index (when the leakage index includes the deformation index, the leakage result can be considered as no leakage only when the deformation index also satisfies the requirement of less than 4.6 mm). In this way, the leakage result can be further determined in step S50 based on the above leakage index.

[0081] Defective cladding parameters that meet the defect repair target are determined based on the leakage index. That is, based on the above leakage results, a leakage verification result of the nuclear power plant BOSS head after the cladding repair can be obtained. Based on the above leakage test results, it can be determined whether the cladding repair of the nuclear power plant BOSS head can be safely completed by performing water and pressure cladding operations using the cladding repair data. That is, the leakage test result is an assessment result of the feasibility of cladding repairing the nuclear power plant BOSS head using the cladding repair data. After the feasibility meets the requirements of the nuclear power plant (that is, the defect repair target), the cladding repair data can be used as defective cladding parameters.

[0082] Among them, to judge whether the feasibility meets the requirements of the nuclear power plant, when the water-carrying and pressure-carrying leakage index is no leakage, and the cross-sectional metallographic crack index is no crack extension in the cross-sectional metallographic structure, the leakage result is confirmed to be no leakage; that is, when the water-carrying and pressure-carrying leakage index is no leakage, and at the same time the cross-sectional metallographic crack index is no crack extension in the cross-sectional metallographic structure, the leakage result is no leakage, indicating that at this time, the water-carrying and pressure-carrying welding operation can be performed through the welding repair data corresponding to this group of leakage indicators, and the welding repair of the BOSS head of the nuclear power plant can be safely completed, that is, the feasibility of the welding repair meets the requirements of the nuclear power plant, that is, it meets the defect repair target.

[0083] Furthermore, when the water-under-pressure leakage indicator indicates leakage, and the cross-sectional metallographic crack indicator indicates crack propagation in the cross-sectional metallographic image, the leakage result is confirmed as leakage. That is, when the water-under-pressure leakage indicator indicates leakage, and the cross-sectional metallographic crack indicator indicates crack propagation in the cross-sectional metallographic image, the leakage result is leakage, indicating that performing water-under-pressure cladding repair operations using the cladding repair data corresponding to this set of leakage indicators may result in a leakage accident. At this time, the cladding repair solution for the nuclear power plant BOSS head is unsafe, and the cladding repair feasibility requirement is not met, that is, the defect repair target is not met.

[0084] In a specific embodiment, the leakage indicators include a water-under-pressure leakage indicator, an external defect display indicator, an inner surface metal slag indicator, a cross-sectional metallographic crack indicator, a weld fusion indicator, a hardening indicator, an oxidation indicator, a penetration indicator, and a deformation indicator. In this case, if the leakage indicators simultaneously meet the following requirements, the leakage result is confirmed as a leak: the water-under-pressure leakage indicator is no leakage, the external defect display indicator is no defect display, the inner surface metal slag indicator is no slag on the inner surface metal, the cross-sectional metallographic crack indicator is no crack propagation on the cross-sectional metallographic surface, the weld fusion indicator is good weld fusion, the hardening indicator is no hardened structure, the oxidation indicator is no abnormal oxidation on the inner surface of the pipe, the penetration indicator is less than 1.1 mm, and the deformation indicator is less than 4.6 mm. If any of the above leakage indicators is not met, the leakage result is considered to be a leak, and there may be a risk of leakage.

[0085] In one embodiment, performing a surfacing verification operation on the second BOSS head simulated pipe according to the surfacing repair parameters to obtain a surfacing verification result corresponding to the surfacing repair parameters includes:

[0086] Performing a surfacing operation on the second BOSS head simulated pipe fitting according to the surfacing repair parameters to obtain the second BOSS head simulated pipe fitting that has completed surfacing repair;

[0087] It is understandable that after determining the cladding repair parameters based on the cladding category parameters corresponding to each of the cladding repair categories, a cladding operation can be performed on the second BOSS head simulated pipe fitting according to the cladding repair parameters to obtain a second BOSS head simulated pipe fitting that has undergone cladding repair. The second BOSS head simulated pipe fitting that has undergone cladding repair can be a plurality of different simulated pipe fittings. For example, the cladding repair parameters can include anhydrous conditions, water conditions, water- and pressure-containing conditions, etc., thereby allowing different simulated pipe fittings to be prefabricated through cladding repair.

[0088] A surfacing verification operation is performed on the second BOSS head simulated pipe fitting that has completed surfacing repair to obtain the surfacing verification result.

[0089] In one embodiment, performing a surfacing verification operation on the preset prepared pipe that has completed surfacing repair to obtain the surfacing verification result includes:

[0090] Performing metallographic verification of the composition of the second BOSS head simulated pipe fitting that has completed the surfacing welding repair to obtain a metallographic verification result;

[0091] Understandably, compositional metallographic verification is used to verify the suitability and efficiency of the cladding repair process. Furthermore, compositional metallographic verification can also verify the material composition, forming quality, weld bead dimensions, defect presence, and hardness of the simulated pipe, ultimately yielding metallographic verification results.

[0092] Performing mechanical property verification on the second BOSS head simulated pipe fitting that has completed surfacing welding repair to obtain a mechanical property verification result;

[0093] It can be understood that the mechanical property verification includes multiple verification items, among which the verification items may include transverse stretching of the weld joint, longitudinal stretching of the deposited metal, face bending, back bending, impact test, chemical analysis, etc.

[0094] The surfacing verification result is determined based on the metallographic verification result and the mechanical property verification result.

[0095] Specifically, after performing composition metallographic verification on the second BOSS head simulated pipe fitting that has completed surfacing repair to obtain the metallographic verification result, and performing mechanical property verification on the second BOSS head simulated pipe fitting that has completed surfacing repair to obtain the mechanical property verification result, the surfacing verification result is determined based on the metallographic verification result and the mechanical property verification result. That is, based on the metallographic verification result, it can be determined whether the surfacing repair parameters meet the requirements such as defects and weld bead size, and based on the mechanical property verification result, it can be determined whether the surfacing repair parameters meet the requirements such as no cracks, incomplete penetration, and incomplete fusion, and then the surfacing verification result is determined.

[0096] It should be understood that the order of execution of the steps in the above embodiments does not necessarily mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0097] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 4 As shown. The computer device includes a processor, a memory, a network interface and a database connected via a system bus. 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 nuclear power plant BOSS head surfacing repair test method in the above-mentioned embodiment. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a nuclear power plant BOSS head surfacing repair test method is implemented.

[0098] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the nuclear power plant BOSS head surfacing repair test method in the above embodiment is implemented.

[0099] 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, the nuclear power plant BOSS head surfacing welding repair test method in the above embodiment is implemented.

[0100] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the 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-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. 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 (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0101] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, 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.

[0102] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A nuclear power plant BOSS head surfacing repair test method, characterized in that: include: Receive a surfacing repair instruction for surfacing welding the BOSS head of a nuclear power plant; the surfacing repair instruction includes a plurality of surfacing repair categories and surfacing repair sets corresponding to each of the surfacing repair categories; A surfacing repair set includes a surfacing repair target and at least one set of surfacing repair conditions corresponding to the surfacing repair target; the nuclear power plant BOSS head includes a main pipe and a branch pipe connected to the main pipe at a preset angle; Using each set of the surfacing repair conditions in a surfacing repair set, surfacing operations of the surfacing repair category corresponding to the surfacing repair set are performed on different first BOSS head simulated pipe fittings, and all sets of the surfacing repair conditions that meet the surfacing repair target are recorded as surfacing category parameters corresponding to the surfacing repair category; all the first BOSS head simulated pipe fittings are consistent with the size and material of the nuclear power plant BOSS head; Determining surfacing repair parameters according to the surfacing type parameters corresponding to each surfacing repair type; Performing a surfacing verification operation on the second BOSS head simulated pipe fitting according to the surfacing repair parameters to obtain a surfacing verification result corresponding to the surfacing repair parameters; All the second BOSS head simulation pipe fittings are consistent with the size and material of the nuclear power plant BOSS head; Determining target surfacing repair parameters corresponding to the BOSS head of the nuclear power plant according to the surfacing verification result; When the surfacing repair category is a defective BOSS head repair category, the surfacing repair target corresponding to the defective BOSS head repair category is a defect repair target; the surfacing repair conditions corresponding to the defect repair target include water and pressure conditions and defect repair parameters; The defect repair parameters are used to perform surfacing welding repair on the four defects existing on the BOSS head of the nuclear power plant; the surfacing welding repair parameters include surfacing welding parameters with defects; The method further comprises: performing surfacing operations of the surfacing repair category corresponding to the surfacing repair set on different first BOSS head simulated pipe fittings through each group of the surfacing repair conditions in the surfacing repair set, and recording all groups of the surfacing repair conditions that meet the surfacing repair target as surfacing category parameters corresponding to the surfacing repair category, including: Acquire defect data corresponding to four defects on the BOSS head of the nuclear power plant, and prefabricate the first BOSS head simulated pipe fitting according to the defect data to obtain a simulated pipe fitting with defects; Performing a surfacing operation corresponding to the defective BOSS head repair category on the weld area of ​​the defective simulated pipe fitting according to the surfacing repair data to obtain a repaired BOSS head simulated pipe fitting; Determine the leakage index of the repaired BOSS head simulated pipe fittings; Defective surfacing parameters that meet the defect repair target are determined based on the leakage index.

2. The nuclear power plant BOSS head surfacing repair test method according to claim 1, characterized in that: When the surfacing repair category is a welding material comparison category, the surfacing repair target corresponding to the welding material comparison category is a surfacing material target; and the surfacing repair condition corresponding to the surfacing material target is a preset surfacing material. The surfacing category parameters include surfacing material parameters; The method further comprises: performing surfacing operations of the surfacing repair category corresponding to the surfacing repair set on different first BOSS head simulated pipe fittings through each group of the surfacing repair conditions in the surfacing repair set, and recording all groups of the surfacing repair conditions that meet the surfacing repair target as surfacing category parameters corresponding to the surfacing repair category, including: Prefabricate the first BOSS head simulated pipe fitting according to the preset surfacing material to obtain a surfacing material pipe fitting; Performing a surfacing operation corresponding to the comparison category of the welding material on the surfacing material pipe fitting to obtain a surfacing material pipe fitting repaired by surfacing welding; The cladding material pipe fittings after cladding repair are verified to obtain a material pipe fitting verification result, and cladding material parameters that meet the cladding material target are determined based on the material pipe fitting verification result.

3. The nuclear power plant BOSS head surfacing welding repair test method according to claim 1, characterized in that: When the surfacing repair category is a key surface surfacing category, the surfacing repair target corresponding to the key surface surfacing category is a pipe surface target; the surfacing repair conditions corresponding to the pipe surface target include multiple pipe surface parameter sets; one pipe surface parameter set includes multiple groups of pipe surface surfacing parameters; each group of pipe surface surfacing parameters in the same pipe surface parameter set includes at least one identical fixed repair parameter and at least one different variable repair parameter; and the variable repair parameters in different pipe surface parameter sets are different; the surfacing repair parameters include pipe surface parameters; The method further comprises: performing surfacing operations of the surfacing repair category corresponding to the surfacing repair set on different first BOSS head simulated pipe fittings through each group of the surfacing repair conditions in the surfacing repair set, and recording all groups of the surfacing repair conditions that meet the surfacing repair target as surfacing category parameters corresponding to the surfacing repair category, including: Performing a surfacing operation on the simulated surface of the first BOSS head simulated pipe according to the pipe surface surfacing parameters to obtain a surfacing surface result corresponding to the pipe surface condition; the simulated surface refers to a surface on the first BOSS head simulated pipe that is consistent in size and material with a preset surface of the nuclear power plant BOSS head; the preset surface refers to the surface at the junction of the main pipe and the branch pipe; Determining optimal repair parameters from all the surfacing surface results corresponding to the same pipe surface parameter set; the optimal repair parameters are parameters that correspond to the variable repair parameters of the pipe surface parameter set and meet the pipe surface target; The pipe surface parameters are determined according to the optimal repair parameters corresponding to each pipe surface parameter set.

4. The nuclear power plant BOSS head surfacing welding repair test method according to claim 3, characterized in that: The fixed repair parameter and the variable repair parameter are both at least one of interpass temperature, welding method, internal medium and welding speed; and the fixed repair parameter and the variable repair parameter in the same set of surfacing repair parameters are different.

5. The nuclear power plant BOSS head surfacing welding repair test method according to claim 1, characterized in that: When the surfacing repair category package is a defect-free BOSS head repair category, the surfacing repair target corresponding to the defect-free BOSS head repair category is a defect-free repair target; the surfacing repair conditions corresponding to the defect-free repair target include a water-free condition and a water-and-pressure condition; and the surfacing repair parameters include defect-free surfacing parameters. The method further comprises: performing surfacing operations of the surfacing repair category corresponding to the surfacing repair set on different first BOSS head simulated pipe fittings through each group of the surfacing repair conditions in the surfacing repair set, and recording all groups of the surfacing repair conditions that meet the surfacing repair target as surfacing category parameters corresponding to the surfacing repair category, including: Acquire waterless surfacing welding parameters corresponding to the waterless condition, and water- and pressure-containing surfacing welding parameters corresponding to the water- and pressure-containing condition; Performing a surfacing operation corresponding to the defect-free BOSS head repair category on the first BOSS head simulated pipe fitting according to the waterless surfacing parameters to obtain a waterless surfacing result; and simultaneously performing a surfacing operation corresponding to the defect-free BOSS head repair category on the first BOSS head simulated pipe fitting according to the water- and pressure-based surfacing parameters to obtain a water- and pressure-based surfacing result; Determine defect-free surfacing parameters that meet the defect-free repair goal based on the waterless surfacing result and the water- and pressure-containing surfacing result.

6. The nuclear power plant BOSS head surfacing welding repair test method according to claim 1, characterized in that: The four defects are respectively arranged at the 0 degree position, 90 degree position, 180 degree position and 270 degree position corresponding to the weld area of ​​the main pipe and the branch pipe.

7. The nuclear power plant BOSS head surfacing welding repair test method according to claim 1, characterized in that: Determining the leakage index of the repaired BOSS head simulated pipe fitting includes: Determine the first leakage test index of the repaired BOSS head simulation pipe fittings through visual non-destructive testing and dye penetrant non-destructive testing; The second leakage test index of the repaired BOSS head simulation pipe is determined through metallographic testing; The leakage index is determined according to the first leakage test index and the second leakage test index.

8. The nuclear power plant BOSS head surfacing welding repair test method according to claim 1, characterized in that: The performing of a surfacing verification operation on the second BOSS head simulated pipe fitting according to the surfacing repair parameters to obtain a surfacing verification result corresponding to the surfacing repair parameters includes: Performing a surfacing operation on the second BOSS head simulated pipe fitting according to the surfacing repair parameters to obtain the second BOSS head simulated pipe fitting that has completed surfacing repair; A surfacing verification operation is performed on the second BOSS head simulated pipe fitting that has completed surfacing repair to obtain the surfacing verification result.

9. The nuclear power plant BOSS head surfacing welding repair test method according to claim 8, characterized in that: The surfacing verification operation is performed on the preset prepared pipe fitting that has completed the surfacing repair to obtain the surfacing verification result, including: Performing metallographic verification of the composition of the second BOSS head simulated pipe fitting that has completed the surfacing welding repair to obtain a metallographic verification result; Performing mechanical property verification on the second BOSS head simulated pipe fitting that has completed surfacing welding repair to obtain a mechanical property verification result; The surfacing verification result is determined based on the metallographic verification result and the mechanical property verification result.

10. 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 nuclear power plant BOSS head surfacing repair test method according to any one of claims 1 to 9 is implemented.

11. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the nuclear power plant BOSS head surfacing repair test method according to any one of claims 1 to 9 is implemented.

Images