CN111325044A - Method for determining new component code of nuclear power station, identification system and identification method - Google Patents

Abstract

The invention discloses a method for determining codes of new nuclear power plant components, a recognition system and a recognition method, wherein the method for determining the codes comprises the steps of arranging A × B codes on the new nuclear power plant components for recognition test, determining A1 expected sizes and B1 expected depth values of the codes, carrying out recognition test on the A1 × B1 codes, determining expected installation angles of recognition devices, installing the recognition devices at the expected installation angles, carrying out recognition test on the codes by taking offset angles of the codes relative to the visual field centers of the recognition devices as variables for the A1 × B1 codes, determining the A2 expected sizes and B2 expected depth values of the codes, carrying out recognition test on the codes by taking the offset angles as variables through a first opening of a guide pipe by using the recognition devices for the A2 × B2 codes, determining the A3 expected sizes and B3 expected depth values of the codes by taking the moving speed of the codes as variables for the A3 × B3 codes, and determining the expected optimal sizes and optimal depth values of the codes.

Description

A determination method, identification system and identification for new component code of nuclear power plant method

technical field

Embodiments of the present invention relate to the technical field of nuclear engineering, and in particular, to a determination method, an identification system and an identification method for coding of new components of a nuclear power plant.

Background technique

Various components in a nuclear reactor are important components to maintain the chain reaction and reactor power control. All components have unique numbers, and the transfer and operation of components are very important. In order to ensure the correct operation of the component, it is necessary to identify the component number.

However, in the fields of existing pressurized water reactors and fast reactors, there is no identification device to automatically determine the component number for the plugging and unplugging operations of components and the transportation process. Incorrect insertion and removal and transport errors, resulting in damage and even danger.

The component number marked with clear code has no error correction function, and the reading rate is low. If one digit is blocked or defaced, the entire number cannot be recognized, and it is not suitable for automatic reading of the component number of nuclear power plants. Therefore, it is necessary to transform and innovate the marking method of nuclear power plant component numbers to improve its error correction ability, reading rate and anti-fouling ability. At present, the component number has been coded and marked at a certain position of the component, and the component code is identified by the code identification device.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a determination method, an identification system and an identification method for coding of new components of a nuclear power plant, so as to solve at least one aspect of the above technical problems.

According to one aspect of the present invention, a method for determining a code for a new component of a nuclear power plant is proposed, which includes: setting A×B codes on the new components of a nuclear power plant for A×B codes jointly defined by A size and B depth values , and use the identification device to carry out the identification test to determine the A1 expected size and B1 expected depth value of the code; for the A1×B1 encoding, use the identification device with various installation angles to carry out the identification test for each code , to determine the desired installation angle of the identification device; install the identification device at the desired installation angle, and perform the following steps: for A1×B1 kinds of coding, to encode the offset angle relative to the center of the visual field of the identification device Carry out identification tests for variables to determine the A2 desired sizes and B2 desired depth values of the codes; for A2×B2 codes, use the identification device to pass through the first opening of the guide tube with the offset angle as a variable Carry out identification tests on the encoding to determine the A3 desired sizes and B3 desired depth values of the encoding; and for A3×B3 encodings, perform identification tests with the moving speed of the encoding as a variable to determine the optimal expected size and the most optimal encoding. The optimal expected depth value.

According to some embodiments, performing the identification test on the A×B codes includes: setting the A×B codes on the control rod assembly and performing the identification test to determine a1 desired sizes and b1 desired depths of the codes value; and for a1×b1 kinds of codes, set it on the fuel rod assembly and carry out identification tests to determine the A1 kinds of expected size and B1 kinds of depth values of the codes.

According to some embodiments, performing an identification test on the A1×B1 kinds of codes includes: setting the A1×B1 kinds of codes on the control rod assembly, and performing an identification test under a plurality of the offset angles to determine the codes a2 desired sizes and b2 desired depths of a desired depth value.

According to some embodiments, the method further includes: performing an identification test on the A2×B2 kinds of codes includes: setting the A2×B2 kinds of codes on the control rod assembly, and using the identification device to pass the first part of the guide tube Carry out the identification test for the code through the opening to determine the a3 expected sizes and b3 expected depth values of the code; and set the a3×b3 codes on the fuel rod assembly, and use the identification device to pass through the first opening of the guide tube Identification trials are performed on the encoding to determine A3 expected sizes and B3 expected depth values for the encoding.

According to some embodiments, the method further includes: performing an identification test on the A3×B3 kinds of codes includes: setting the A3×B3 kinds of codes on a control rod assembly, and setting the control rod assembly to have multiple moving at a speed, using the identifying device to identify the codes to determine the a4 expected sizes and b4 expected depth values of the codes; and setting the a4×b4 codes on the fuel rod assemblies, and placing the fuel rod assemblies on the fuel rod assemblies Arranged to move at a plurality of speeds, the encoding is identified by the identification means to determine an optimal desired size and an optimal desired depth value of the encoding.

According to some embodiments, the recognition effect of the coding is judged based on the recognition time and recognition rate of the coding.

According to some embodiments, the A dimension is no more than 16% of the diameter of the new component at the location of the coding mark; and the B depth value is in a range of no more than 500 μm.

According to some embodiments, the code is formed using a pin marking device.

According to another aspect of the present invention, an identification system for coding of a new component of a nuclear power plant is proposed, comprising: a pin marking device, configured to form a desired coding on the head of the new component, the desired coding having the code according to the the optimal desired depth value and the optimal desired size determined by the coding determination method; a new component loader, configured to transfer the new component formed with the desired coding, the new component loader comprising a guide tube and a guide The new assembly is arranged in a guide tube and moves relative to the guide column together with the guide tube, the guide tube has a first opening, the guide column has a second opening; and is installed in the second opening The identification device and the polarized light source are provided, the polarized light source can illuminate the desired code of the new component through the first opening, and the identification device can identify the desired code through the first opening; wherein, the second opening has an inclination angle , so that the identification device has the desired installation angle determined by the code determination method.

According to some embodiments, the position of the first opening is determined according to the position of the second opening and the position of the guide tube of the new component loader.

According to some embodiments, the head of the new assembly includes a plurality of arcuate surfaces separated by a plurality of slots, each of which is provided with the desired code.

According to another aspect of the present invention, a method for identifying a new component code by using the identification system is proposed, which includes: forming a desired code on the head of the new component by using a pin marking device; and using the new component to load The machine transfers the new component formed with the desired code; wherein, in the process of transferring the new component by the new component loader, the desired code is irradiated with a polarized light source, and the desired code is identified by the identification device, so as to identify the desired code. The new component of the operation is confirmed.

In the method for determining coding for a new component of a nuclear power plant according to an embodiment of the present invention, by determining the optimal desired depth value, optimal desired size of coding, and desired installation angle of the identification device, and setting the polarized light source, the identification device can be guaranteed It has a good recognition effect on the code of movement in the dark environment of the new component loader, so that during the transportation of the new component, the new component in operation can be automatically recognized at the same time, so that it does not affect the existing process. In this case, the component information can be grasped more comprehensively and reliably, and the reliability of the component operation can be improved.

Description of drawings

Other objects and advantages of the present invention will be apparent from the following description of the present invention with reference to the accompanying drawings, and may assist in a comprehensive understanding of the present invention.

Figure 1 shows a schematic structural diagram of a new component according to an exemplary embodiment of the present invention;

Figure 2 shows a schematic diagram of the head of the new assembly of Figure 1;

Figure 3 shows a schematic diagram of the encoding of a new component according to an exemplary embodiment of the present invention;

FIG. 4 shows a schematic diagram of the installation angle of the identification device according to an exemplary embodiment of the present invention;

FIG. 5 shows a flow chart of a method for determining a code for a new component of a nuclear power plant according to an exemplary embodiment of the present invention;

FIG. 6 shows a schematic structural diagram of a new component loader according to an exemplary embodiment of the present invention.

Detailed ways

The technical solutions of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals refer to the same or similar parts.

In the following detailed description, for convenience of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. Obviously, however, one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in diagram form in order to simplify the drawings.

The components of a nuclear power plant include new components and spent components. The components before entering the nuclear reactor are called new components, and the components coming out of the nuclear reactor are called spent components. Types of nuclear power plant assemblies may include, for example, fuel rod assemblies, control rod assemblies, and the like. FIG. 1 shows a schematic structural diagram of a new component 10 according to an exemplary embodiment of the present invention, and FIG. 2 shows a schematic diagram of the head 11 of the new component 10 of FIG. 1 . As shown in FIGS. 1-2 , taking a fuel rod assembly as an example, the new assembly 10 includes a head 11 , a fuel section 12 and a pin section 13 . The new assembly 10 has a cylindrical shape as a whole, and the head 11 includes a plurality of arc surfaces separated by a plurality of grooves. Referring to FIG. 2 , six grooves are opened on the cylindrical surface of the head 11 , and the six grooves equally divide the cylindrical surface to form six arcuate surfaces. Each slot corresponds to a coolant outlet hole.

In a nuclear reactor, there are many kinds and quantities of new assemblies 10, and each new assembly 10 is provided with a unique number. In embodiments of the present invention, new components entering the reactor are identified and checked for correctness by automatic identification techniques. The number of the clear code is an eight-digit number. It has no error correction function and has a low reading rate. If one digit is blocked or defaced, the entire number cannot be recognized. It is not suitable for automatic reading of nuclear power plant component numbers. Therefore, it is necessary to Convert existing numbered markers to coded markers to improve code read rates and reliability. The encoding includes one-dimensional encoding and two-dimensional encoding, both of which have error correction functions. Specifically, two-dimensional codes include DM codes and QR codes. The present invention compares and analyzes the data type, data quantity, safety reliability, reading rate, error correction ability, etc. of one-dimensional code and two-dimensional code (DM code and QR code), and the results are shown in Table 1.

Table 1 Analysis and comparison of one-dimensional code and two-dimensional code (DM code and QR code)

According to the above comparison, the above encoding methods all meet the requirements of 8-bit digital encoding; compared with one-dimensional encoding, two-dimensional encoding has the advantages of large amount of information, safety and reliability, high reading rate, and strong error correction ability. For DM code and QR code, both have strong error correction ability, but DM code has better performance in code damage, some barcodes can be accurately read only by reading 20% of the data; meanwhile, DM code The size can be adjusted arbitrarily, the maximum can be 14 square inches, the minimum can be 0.0002 square inches, this size is also the smallest one-dimensional encoding and two-dimensional encoding. Therefore, the coding form of the present invention preferably adopts the DM code. Further, the DM code type selected by the present invention is ECC200. ECC200 uses the Reed-Solomon algorithm to generate polynomial error correction codes. It is an error correction code with excellent performance. It has the ability to correct burst errors and random errors, and it is more effective to correct burst errors. Error capability and coding efficiency are the highest.

The outer surface material of the new components is generally stainless steel, and the shape is a cylindrical surface, which is used in the radiation environment. The material, shape, and application environment of the outer surface of the new component impose constraints and requirements on the way codes can be formed on the new component. The existing method of processing permanent marks generally adopts the direct part marking technology DPM (Direct Part Marking), which is a technology of directly marking machine-readable codes on the surface of a product or part. DPM technology can be divided into:

Laser direct marking technology (Laser Marking), the laser interacts with the material, and the temperature of the material heat affected zone rises rapidly in a short period of time, causing the surface of the processed material to melt, ablate or even vaporize, thereby forming a mark;

Electro-Chemical Etching, which uses electronic/chemical reactions to print pre-designed and printed templates on materials;

Ink Jet Marking, DPM's ink jet printer works on the same principle as common PC printers, it can accurately eject ink droplets onto the surface of the material;

Mechanical Dot Peen marking technology (Dot Peen) uses carbide or diamond nibs to strike the surface of the material in a pneumatic or electromechanical manner to form permanent dents. The current two-dimensional coding marking process is electromagnetic Dot Peen marking.

The present invention compares and analyzes four DPM labeling technologies, and the results are shown in Table 2.

Table 2 Analysis of DPM labeling technology

According to the above analysis, the above four marking technologies can all meet the requirements of coding on metal materials, but the speed of electrochemical marking is slow, and the chemical reaction with metal occurs, which is not suitable for marking technology for new components; inkjet marking is resistant to It has poor wear resistance and is not suitable for use as a marking technique for new components.

The invention tests the marking effects of the laser marking technology and the dot needle marking technology respectively, and finds that when the laser marking technology is used to reach a coding depth of more than 100 μm, there are problems that the marking time is too long (about 300s), the workpiece is melted, and the coding quality is poor; The code obtained using the dot-pin marking technology is clear and the marking time is short. In addition, the components are immersed in the core coolant for a long time, and the high temperature and strong corrosiveness of the coolant will heat the code and cause a chemical corrosion reaction. The invention simulates the high temperature and strong corrosive environment of the core to carry out the immersion test on the component code, and puts the two test samples marked with the dot needle and the laser mark in the simulated high temperature and strong corrosive liquid for continuous heating for 240 hours, and then takes them out and cleans them. Afterwards, it was found that the surface of the sample marked with the dot needle only turned black and lost its metallic luster; while the laser-marked sample not only turned black and lost its metallic luster, but also had poor coding contrast, worn edge areas, and reduced black areas, that is, laser marking. Unstable oxides will be formed on the metal surface, and the metal oxides will be quickly reduced in high temperature and strong corrosive liquids, which will contaminate the core coolant with oxygen and metal impurities and affect the purity of the core coolant.

It can be seen that the two-dimensional code marked by needle engraving has better corrosion resistance and higher reading rate than the two-dimensional code marked by laser marking. FIG. 3 shows a schematic diagram of the code 21 of the new component according to an exemplary embodiment of the present invention. As shown in FIG. 3 , the pattern of the code 21 is composed of a plurality of dots formed by a needle marking device.

The recognition effect of the new component code 21 depends on the size and depth of the code. If the code is too deep and the size is too small, the code is too dense and difficult to recognize; if the code is too shallow and the size is too large, the code is too sparse and difficult to recognize. At the same time, the position of the marking code of the new component is a cylindrical surface. The larger the size of the coding mark, the greater the influence of the curvature of the arc surface, and the more difficult the code is to be recognized; but the smaller the size of the code, the more polluted the coding part under the same pollution degree. The larger the ratio is, the subsequent recognition effect will be affected.

In addition, the recognition angle of the recognition device will also affect the recognition effect. When the lens of the recognition device faces the code at a certain angle instead of directly facing the code, the contrast between the code and the surface of the new component can be enhanced to achieve good recognition. Effect. 4 shows a schematic diagram of the installation angle of the identification device 41 according to an exemplary embodiment of the present invention. As shown in FIG. 4 , the identification device 41 is installed at an angle α relative to the horizontal direction, and the installation angle determines the installation angle of the identification device 41 For the recognition angle, an angle α is also formed between the facing direction of the lens of the recognition device 41 and the horizontal direction.

It can be seen that the coding size, coding depth value and the installation angle of the recognition device of the new component are the keys to determine the coding recognition effect.

Fig. 5 shows a flowchart of a method for determining a code for a new component of a nuclear power plant according to an exemplary embodiment of the present invention. As shown in Fig. 5, the method may include:

S1, for the A×B codes jointly defined by the A size and the B depth value, set it on the new component of the nuclear power plant, and use the identification device to carry out the identification test to determine the desired size of the code A1 and B1 a desired depth value;

S2, for A1×B1 kinds of codes, use identification devices with multiple installation angles to perform identification tests on each code to determine the expected installation angle of the identification device;

Install the identification device at the desired installation angle and perform the following steps:

S3, for A1×B1 kinds of codes, carry out the identification test with the offset angle of the code relative to the center of the visual field of the identification device as a variable, so as to determine the A2 kinds of expected sizes and B2 kinds of expected depth values of the encoding;

S4, for A2×B2 kinds of codes, using the offset angle as a variable, use the identification device to perform an identification test on the codes through the first opening of the guide tube, so as to determine the A3 kinds of desired sizes and B3 kinds of desired depths of the codes value; and

S5 , for A3×B3 kinds of encodings, the identification test is carried out with the moving speed of the encoding as a variable, so as to determine the optimal expected size and the optimal expected depth value of the encoding.

In the method for determining the encoding of the new component according to the embodiment of the present invention, by determining the optimal expected depth value, the optimal expected size of the encoding, and the expected installation angle of the identification device, it can be ensured that the identification device has a good performance for the encoding in the moving state. Recognition effect, so that during the transportation of new components, the new components in operation can be automatically recognized at the same time, so that the component information can be grasped more comprehensively and reliably without affecting the existing process, and the operation of the components can be improved. reliability.

In the above steps, the recognition effect of the coding can be judged based on the recognition time and recognition rate of the coding, that is, the recognition device is used to recognize each code. The shorter the recognition time is, the better the recognition effect is, and the higher the recognition rate is, the better the recognition effect is. , select the size, depth value and installation angle corresponding to the code with good recognition effect. The size of type A does not exceed 16% of the diameter of the new component at the position of the coding mark, that is, the width of the coding does not exceed 16% of the diameter of the new component at the position of the coding mark; the range of the depth value of type B is not more than 500μm . Each code is a DM code formed by a needle marking device.

After step S1, the range of the coding size can be reduced according to the recognition effect of the coding of the A size, and the desired size of A1 can be determined within the range, and the range of the coded depth value can be reduced according to the recognition effect of the coding of the B depth value, Within this range, B1 kinds of expected depth values are determined again, and then the identification test of step S2 is performed.

Specifically, in step S1, performing an identification test on the A×B codes may include:

disposing the AxB codes on the control rod assembly and performing an identification test to determine a1 desired sizes and b1 desired depth values of the codes; and

For the a1×b1 kinds of codes, set them on the fuel rod assembly and carry out identification tests to determine the A1 kinds of expected sizes and B1 kinds of expected depth values of the codes.

Since the outer diameter of the control rod assembly at the position of the coding mark is smaller than the outer diameter of the fuel rod assembly at the position of the coding mark, for the coding of the same size, the coding on the control rod assembly is more affected by the curvature of the curved surface, that is, the coding of the same size The deformation of the code on the control rod assembly is more serious and difficult to identify than that on the fuel rod assembly, so the test can be carried out on the control rod assembly first, and the first size range is determined according to the test results of size A, and within this range Determine a1 kinds of expected sizes; similarly, a first depth value range can be determined, and b1 kinds of expected depth values are determined within this range; Carry out the identification test on the fuel rod assembly, determine the second size range and the second depth value range according to the test results of the a1 desired sizes and the b1 depth values, and determine the A1 desired sizes and the B1 desired depth values in step S2. . In step S1, the installation angle of the identification device, the offset angle of the code relative to the center of the field of view of the identification device, and the moving speed of the assembly are all determined values, and no guide tube is provided.

In step S2, the offset angle of the code relative to the center of the visual field of the identification device and the moving speed of the assembly are both determined values, and no guide tube is provided.

In step S3, the identification test for the A1×B1 codes includes:

Setting the A1×B1 codes on the control rod assembly, and performing identification tests at a plurality of the offset angles to determine a2 desired sizes and b2 desired depth values of the codes; and

A2×b2 kinds of codes are set on the fuel rod assembly, and identification tests are carried out at a plurality of the offset angles to determine the A2 kinds of desired sizes and B2 kinds of desired depth values of the codes.

In step S3, the installation angle of the identification device and the moving speed of the assembly are both determined values, and no guide tube is provided.

Specifically, the identification device is installed at the desired installation angle, each code is set to have a plurality of offset angles with respect to the center of the field of view of the identification device, and each code is set at the plurality of offset angles. code for identification. Perform data analysis and processing on the obtained different code reading times, and count the number of successful code readings to obtain the average recognition time and recognition rate of each code at different offset angles. According to the shortest recognition time and the highest recognition rate principle, select the desired size.

When a part of the code enters the field of view of the identification device, it may also be identified. Therefore, adding the offset angle for comprehensive consideration can ensure that the selection result is more reasonable.

For new components, the transportation process includes transfer using new component loader, which is the main equipment for new component process transportation, and its function is to grab and insert new components. FIG. 6 shows a schematic structural diagram of a new component loader 30 according to an exemplary embodiment of the present invention. As shown in FIG. 6 , the new component loader 30 includes a guide column 32 and a guide tube 31 provided in the guide column 32 , the grabbing device controlled by the wire rope grabs and inserts the new component, the new component is in the guide tube 31 and moves up and down in the vertical direction together with the guide tube 31, the guide column 32 is fixed on the mechanical equipment, and can be arranged in a certain arc Horizontal rotation movement. In the present invention, the code is identified in the process of transferring the new assembly by the new assembly loader, so it is necessary to set the second opening 34 on the guide column 32 for installing the identification device, and correspondingly, set the first opening on the guide pipe 31 33 exposes the code of the new assembly to the field of view of the identification device, avoiding obstruction by the wall of the guide tube.

In step S4, the identification test for the A2×B2 kinds of codes includes:

The A2×B2 kinds of codes are set on the control rod assembly, and the identification test is performed on the codes through the first opening of the guide tube by the identification device, so as to determine a3 kinds of desired sizes and b3 kinds of desired depth values of the codes; and

Set the a3×b3 codes on the fuel rod assembly, and use the identification device to perform an identification test on the codes through the first opening of the guide tube to determine the A3 desired sizes and B3 desired depth values of the codes.

Wherein, the identification device is installed at the desired installation angle, the code is set to have a plurality of offset angles relative to the center of the field of view of the identification device, and the first opening is used for the identification of the identification device at the plurality of offset angles. Expect encoding for identification. Count whether the recognition device can successfully read and calculate the reading time, and further determine the A3 expected sizes and B3 expected depth values of the encoding based on the recognition time and recognition rate.

In step S4, the installation angle of the identification device and the moving speed of the assembly are both determined values.

In step S5, the identification test for the A3×B3 codes includes:

The A3×B3 codes are set on the control rod assembly, and the control rod assembly is set to move at multiple speeds, and the codes are identified by the identification device to determine the a4 desired sizes of the codes and b4 a desired depth value; and

A4×b4 kinds of codes are set on the fuel rod assemblies, and the fuel rod assemblies are set to move at a plurality of speeds, and the codes are identified by the identification device, so as to determine the optimal desired size and optimal expectation of the codes depth value.

In step S5, the installation angle of the identification device and the offset angle of the code relative to the center of the field of view of the identification device are all determined values, and no guide tube is provided.

Including the consideration of the motion state, it can be ensured that the determined encoding is suitable for the real environment.

So far, according to the above method, the appropriate encoding size, encoding depth value and installation angle of the identification device can be determined.

According to another aspect of the present invention, an identification system for coding new components of a nuclear power plant is proposed, comprising:

a pin marking device, configured to form a desired code at the head of the new component, the desired code having the optimal desired depth value and the optimal desired size determined according to the above code determination method;

The new component loader 30 is configured to transfer the new component formed with the desired code. The new component loader 30 includes a guide tube 31 and a guide column 32. The new component is arranged in the guide tube 31 and is opposite to the guide tube 31 together. The guide post 32 moves, the guide tube 31 has a first opening 33, and the guide post 32 has a second opening 34; and

an identification device and a polarized light source installed in the second opening 34, the polarized light source can illuminate the desired code of the new component through the first opening 33, and the identification device can identify the desired code through the first opening 33;

Wherein, the second opening 34 has an inclination angle, so that the identification device has the desired installation angle determined according to the above coding determination method.

The identification device is installed along the second opening 34, and the desired installation angle of the identification device is the same as the inclination angle of the second opening. The second opening 34 may penetrate through the side wall of one side of the guide column. Equipping the identification device with a polarized light source can provide illumination for the identification of the code in the dark environment of the guide post. The position of the first opening 33 is determined according to the position of the second opening 34 and the position of the guide tube of the new component loader 30, so that when the code of the new component enters the visual field of the identification device, the first opening 33 can insert the new component. Code exposed.

In the present invention, the desired code is set on the head of the new assembly. Since the head of the new assembly is first exposed in the visual field of the identification device when the new assembly moves in the new assembly loader 30, the new assembly can be encoded first. Carry out identification, the identification device sends the identification result to the monitoring unit, and compares it with the preset information stored in the monitoring unit to determine whether the new component grabbed is correct; and the new assembly loader adopts the wire rope to drive the grabbing device to carry the new assembly. Moving up and down in the guide tube, the wire rope connection is a kind of flexible connection, which makes the module shake left and right off the axis, and the head of the module has a smaller shaking amplitude than the pin section of the module, and it is more conducive to the stability of the code to set the code on the head identification; in addition, the radiation dose to the head of the new component is minimal, and the radiation damage to the identification device is minimal.

Considering that the installation position of the identification device is fixed, and the position of the desired code on the new assembly is uncertain relative to the orientation of the identification device, in order to increase the redundancy and reliability of the identification of the new assembly code, the present invention is in the head of the new assembly. The desired codes are provided on a plurality of arc surfaces of the part.

According to another aspect of the present invention, a method for identifying new component codes by using the identification system is proposed, comprising:

Utilize a pin marking device to form the desired code on the head of the new assembly; and

Using a new component loader to transfer new components formed with the desired code;

Wherein, in the process of transferring the new assembly by the new assembly loader, the desired code is irradiated with a polarized light source, and the desired code is identified by an identification device, so as to confirm the new assembly being operated.

In some embodiments, the method of identifying the new component code may include:

Use a pin marking device to form the desired code on the head of the new component;

Calculate the field of view of the recognition device according to the size of the coding mark area, and calculate the image resolution of the recognition device according to the empirical formula, so as to select a certain specification of recognition device; The focal length of the lens of the identification device is calculated to select a suitable lens; and the size of the first opening of the guide tube is determined according to the field of view of the identification device; and

Using a new component loader to transfer new components formed with the desired code;

Wherein, in the process of transferring the new assembly by the new assembly loader, the desired code is irradiated with a polarized light source, and the desired code is identified by an identification device, so as to confirm the new assembly being operated.

The present invention can also conduct an irradiation test on the identification device through a neutron irradiation test to determine the time when the identification device can work reliably, including: simulating the environment where the identification device is located when a new component loader grabs a new component from a new component transport container ; Calculate the total neutron flux that the identification device is subjected to within a certain period of time, and leave a margin; select a single-energy neutron from the various types of neutron irradiation that the identification device actually bears; let The identification device is continuously irradiated with said single-energy neutrons to achieve said total neutron fluence. During this test process, the identification device is constantly performing code identification tests, monitoring the code identification time, and judging whether the identification device fails during the neutron irradiation process. work; if it fails at a certain time, the identification device can only work reliably for the time before that time.

Although the present invention has been described with reference to the accompanying drawings, the embodiments disclosed in the accompanying drawings are intended to illustrate the embodiments of the present invention and should not be construed as a limitation of the present invention. In order to clearly show the details of the various components, the various components in the drawings are not drawn to scale and therefore the proportions of the various components in the drawings should not be taken as a limitation.

Although some embodiments of the present general inventive concept have been shown and described, those of ordinary skill in the art will appreciate that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept. The scope is defined by the claims and their equivalents.

Claims (12)

1. A method for determining a new component code for a nuclear power plant, comprising:

setting A × B codes jointly defined by A sizes and B depth values on a new assembly of the nuclear power plant, and performing identification test on the new assembly by using an identification device to determine A1 expected sizes and B1 expected depth values of the codes;

for the A1 × B1 codes, performing identification tests on each code by using an identification device with various installation angles to determine the expected installation angle of the identification device;

mounting the identification device at the desired mounting angle and performing the steps of:

for A1 × B1 codes, carrying out recognition test by taking the offset angle of the codes relative to the center of the visual field of the recognition device as a variable to determine A2 expected sizes and B2 expected depth values of the codes;

performing a recognition test on the codes through the first opening of the guide tube by using the recognition device to determine A3 expected sizes and B3 expected depth values of the codes by using the deviation angle as a variable for the A2 × B2 codes, and

for the A3 × B3 encodings, recognition experiments are carried out with the moving speed of the encodings as a variable to determine the optimal expected size and optimal expected depth value of the encodings.

2. The method of claim 1, wherein performing identification tests on the a × B codes comprises:

placing the A × B codes on a control stick assembly and performing a recognition test to determine a1 desired sizes and B1 desired depth values of the codes, and

for the a1 × B1 codes, they were placed on the fuel rod assembly and subjected to identification testing to determine the a1 desired sizes of the codes and the B1 desired depth values.

3. The method of claim 1, wherein the performing identification tests on the a1 × B1 codes comprises:

setting the A1 × B1 codes on a control rod assembly, and performing identification test at a plurality of offset angles to determine a2 expected sizes and B2 expected depth values of the codes, and

a2 × B2 codes were placed on the fuel rod assembly and identification testing was performed at a number of the offset angles to determine the a2 desired sizes and B2 desired depth values of the codes.

4. The method of claim 1, wherein the performing identification tests on the a2 × B2 codes comprises:

providing the A2 × B2 codes on the control rod assembly, performing identification test on the codes through the first opening of the guide tube by using the identification device to determine a3 expected sizes and B3 expected depth values of the codes, and

the A3 × B3 codes are arranged on the fuel rod assembly, and the codes are subjected to identification test through the first opening of the guide pipe by using the identification device so as to determine the A3 expected sizes and the B3 expected depth values of the codes.

5. The method of claim 1, wherein the performing identification tests on the a3 × B3 codes comprises:

the A3 × B3 encodings are provided on a control rod assembly and the control rod assembly is arranged to move at a plurality of speeds, the encodings are identified by the identification means to determine a4 desired sizes of encodings and B4 desired depth values, and

providing a4 × b4 codes on a fuel rod assembly and arranging the fuel rod assembly to move at a plurality of speeds, and recognizing the codes by the recognition device to determine the optimal desired size and optimal desired depth value of the codes.

6. The method according to any one of claims 1 to 5, wherein the recognition effect of the code is judged based on the recognition time and the recognition rate of the code.

7. The method of claim 1,

the A sizes are no more than 16% of the diameter of the new component at the location of the code mark; and

the depth values of the B types are within the range of not more than 500 mu m.

8. The method of claim 1, wherein the code is formed using a pin marking device.

9. An identification system for new component codes for nuclear power plants, comprising:

a needle marking device arranged to form a desired code at a head of a new component, the desired code having the optimal desired depth value and the optimal desired size determined according to the code determination method of claim 1;

a new component loader configured to transfer a new component formed with a desired code, the new component loader including a guide tube and a guide post, the new component being disposed in the guide tube and moving together with the guide tube relative to the guide post, the guide tube having a first opening, the guide post having a second opening; and

an identification device and a polarized light source mounted within the second aperture, the polarized light source capable of illuminating a desired code of a new assembly through the first aperture, the identification device capable of identifying the desired code through the first aperture;

wherein the second bore has an inclination such that the identification device has the desired installation angle determined according to the code determination method of claim 1.

10. The system of claim 9, wherein the location of the first opening is determined based on the location of the second opening and a guide tube location of the new component loader.

11. The system of claim 9 wherein the head of the new assembly comprises a plurality of arcuate surfaces separated by a plurality of grooves, each of the plurality of arcuate surfaces having the desired code disposed thereon.

12. A method of identifying a new component code using the identification system of claim 9, comprising:

forming a desired code on the head of the new assembly using a pin marking device; and

transferring a new component formed with a desired code using a new component loader;

wherein during the transfer of the new component by the new component loader, the desired code is illuminated with a polarized light source and identified with an identification device to confirm the new component being operated.

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