Method and device for measuring horizontal displacement of high temperature gas cooled reactor steam generator

Abstract

The embodiment of the present disclosure provides a kind of high temperature gas cooled reactor steam generator horizontal displacement measurement method and device, steam generator is connected with main steam pipeline, main steam pipeline is along the radial direction of the steam generator and is led out from steam generator cabin, main steam pipeline includes the first horizontal pipe in cabin, transition horizontal pipe, the second horizontal pipe outside cabin and vertical pipe outside cabin connected in sequence, transition horizontal pipe is equipped with cabin through piece outside, method includes: obtaining the horizontal displacement of vertical pipe, the first thermal expansion of first horizontal pipe, the second thermal expansion of second horizontal pipe, the third thermal expansion of cabin through piece and the radial expansion of steam generator shell;Steam generator horizontal displacement is calculated according to the above-mentioned parameters obtained by each parameter.The method provides a kind of steam generator horizontal displacement measurement method under normal temperature environment, improves the working environment of measuring instrument, guarantees the effectiveness of displacement measurement.

Description

TECHNICAL FIELD

[0001] The embodiment of the present disclosure belongs to the technical field of displacement measurement of high temperature gas cooled reactor, and particularly relates to a high temperature gas cooled reactor steam generator horizontal displacement measurement method and device. BACKGROUND

[0002] The high temperature gas cooled reactor (hereinafter referred to as "HTR") primary circuit pressure vessel has the characteristics of large size and heavy weight compared with the primary circuit pressure vessel of the pressurized water reactor, and therefore the structural form of the pressure vessel support system used by the HTR is quite different from that of the support structure of the pressurized water reactor pressure vessel. The HTR pressure vessel support system has differences in seismic design and load-bearing design from the support structure of the pressurized water reactor nuclear power plant, and is the first application in the project. In order to ensure the reliability of the unit operation, it is necessary to test the effectiveness of the pressure vessel support system under various operating conditions, and the method is to comprehensively evaluate the parameters such as the spatial displacement amount, inclination and expansion amount of the pressure vessel under different operating conditions.

[0003] The HTR is designed to have the center line of the reactor pressure vessel as a dead line under any operating condition, that is, only the longitudinal and transverse body expansion of the reactor pressure vessel is allowed, and the vessel inclination or spatial misplacement is not allowed. The design of the steam generator pressure vessel requires that the center line of the steam generator pressure vessel is only allowed to have horizontal displacement in the direction of the hot gas duct under any operating condition, and the cylinder inclination and spatial misplacement are not allowed.

[0004] The horizontal displacement of the steam generator is an important parameter to represent the effectiveness of the lateral support and load-bearing support structure of the steam generator, and the displacement amount must be within the design expected range, otherwise it will have a great impact on the integrity of the primary circuit pressure boundary.

[0005] Unlike the design form of the pressurized water reactor nuclear power plant which covers the surface of the primary circuit pressure vessel with thermal insulation material, the surface of the reactor pressure vessel shell, the steam generator shell and the hot gas duct shell of the HTR is not provided with thermal insulation material. In order to ensure that the temperature of the one-loop cabin concrete does not exceed the 70℃ temperature limit during normal operation of the unit, the HTR covers the surface of the one-loop cabin with thermal insulation material and embeds cooling water pipes in the cabin concrete to reduce the temperature of the concrete.

[0006] During the normal operation of the unit, the one-loop cabin is affected by the heat generated by the pressure vessel, and the local ambient temperature is as high as 230-250℃. The cabin door is completely closed, which is a closed space. Under this environment and without active cooling measures, the displacement measuring instrument will fail due to the high temperature when measuring the displacement in the one-loop cabin.

[0007] In view of the above problems, it is necessary to provide a high temperature gas cooled reactor steam generator horizontal displacement measurement method and device which is reasonable in design and effectively solves the above problems. SUMMARY

[0008] The present disclosure aims to at least solve one of the technical problems existing in the prior art, and provides a method and apparatus for measuring the horizontal displacement of a gas-cooled reactor steam generator.

[0009] One aspect of this disclosure provides a method for measuring the horizontal displacement of a steam generator in a high-temperature gas-cooled reactor, applicable to a pebble bed modular high-temperature gas-cooled reactor. The steam generator is connected to a main steam pipe, which extends radially through the steam generator compartment. The main steam pipe includes a first horizontal pipe located inside the compartment, a transition horizontal pipe, a second horizontal pipe located outside the compartment, and a vertical pipe located outside the compartment, connected sequentially. A compartment penetration member is fitted onto the outer side of the transition horizontal pipe.

[0010] The methods include:

[0011] The horizontal displacement of the vertical pipe, the first thermal expansion of the first horizontal pipe, the second thermal expansion of the second horizontal pipe, the third thermal expansion of the compartment penetration, and the radial expansion of the steam generator shell are obtained respectively.

[0012] The horizontal displacement of the steam generator is calculated based on the horizontal displacement of the vertical pipe, the first thermal expansion, the second thermal expansion, the third thermal expansion, and the radial expansion of the steam generator casing.

[0013] Optionally, calculating the horizontal displacement of the steam generator based on the horizontal displacement of the vertical pipe, the first thermal expansion, the second thermal expansion, the third thermal expansion, and the radial expansion of the steam generator casing includes:

[0014] The horizontal displacement L of the steam generator is calculated using the following formula:

[0015] L=ΔL-L1-L2-L3-Lr,

[0016] Wherein, ΔL is the horizontal displacement of the vertical pipe, L1 is the first thermal expansion, L2 is the second thermal expansion, L3 is the third thermal expansion, and Lr is the radial expansion of the steam generator shell.

[0017] Optionally, obtaining the horizontal displacement of the vertical pipe includes:

[0018] The horizontal displacement of the vertical pipe is calculated using the following formula:

[0019] ΔL=L12-L11,

[0020] Wherein, ΔL is the horizontal displacement of the vertical pipe, L12 is the second displacement of the vertical pipe when the steam generator is in the target state, and L11 is the first displacement of the vertical pipe when the steam generator is in the initial state.

[0021] Optionally, obtaining the first thermal expansion of the first horizontal tube includes:

[0022] The first thermal expansion of the first horizontal tube is calculated using the following formula:

[0023] L1 = α × La × ΔT1,

[0024] Wherein, L1 is the first thermal expansion, α is the expansion coefficient, La is the length of the first horizontal tube, and ΔT1 is the maximum temperature difference of the first horizontal tube of the steam generator from the initial state to the target state.

[0025] Optionally, obtaining the second thermal expansion of the second horizontal tube includes:

[0026] The second thermal expansion of the second horizontal tube is calculated using the following formula:

[0027] L2 = α × Lb × ΔT2,

[0028] Where L2 is the second thermal expansion, α is the expansion coefficient, Lb is the length of the second horizontal tube, and ΔT2 is the maximum temperature difference of the second horizontal tube of the steam generator from the initial state to the target state.

[0029] Optionally, obtaining the third thermal expansion of the compartment penetration includes:

[0030] The third thermal expansion of the compartment penetration component is calculated using the following formula:

[0031] L3 = α × Lc × ΔT3

[0032] Wherein, L3 is the third thermal expansion, α is the expansion coefficient, Lc is the length of the compartment penetration, and ΔT3 is the maximum temperature difference of the compartment penetration from the initial state to the target state of the steam generator.

[0033] Optionally, obtaining the radial expansion of the steam generator casing includes:

[0034] A displacement measuring device is installed on the inner side wall of the steam generator compartment, perpendicular to the horizontal displacement direction of the steam generator.

[0035] The radial expansion of the steam generator shell is directly measured by the displacement measuring device.

[0036] Another aspect of this disclosure provides a horizontal displacement measuring device for a high-temperature gas-cooled reactor steam generator, applied to a pebble bed modular high-temperature gas-cooled reactor. The steam generator is connected to a main steam pipe, which extends radially through the steam generator compartment. The main steam pipe includes a first horizontal pipe located inside the compartment, a transition horizontal pipe, a second horizontal pipe located outside the compartment, and a vertical pipe located outside the compartment, connected in sequence. A compartment penetration member is sleeved on the outer side of the transition horizontal pipe. The device includes:

[0037] The acquisition module is used to acquire the horizontal displacement of the vertical pipe, the first thermal expansion of the first horizontal pipe, the second thermal expansion of the second horizontal pipe, the third thermal expansion of the compartment penetration, and the radial expansion of the steam generator shell, respectively.

[0038] The calculation module is used to calculate the horizontal displacement of the steam generator based on the horizontal displacement of the vertical pipe, the first thermal expansion, the second thermal expansion, the third thermal expansion, and the radial expansion of the steam generator shell.

[0039] Optionally, after calculating the horizontal displacement of the steam generator, the method further includes:

[0040] The effectiveness of the primary pressure vessel support system is determined based on the horizontal displacement of the steam generator; wherein...

[0041] If the horizontal displacement of the steam generator exceeds the preset displacement, the primary pressure vessel support system is abnormal.

[0042] If the horizontal displacement of the steam generator does not exceed the preset displacement, the primary pressure vessel support system is normal.

[0043] Another aspect of this disclosure provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, can perform the methods described above.

[0044] This disclosure discloses a method and apparatus for measuring the horizontal displacement of a steam generator in a high-temperature gas-cooled reactor. The method includes: acquiring the horizontal displacement of a vertical pipe, the first thermal expansion of a first horizontal pipe, the second thermal expansion of a second horizontal pipe, the third thermal expansion of a compartment penetration, and the radial expansion of the steam generator shell; and calculating the horizontal displacement of the steam generator based on the horizontal displacement of the vertical pipe, the first thermal expansion, the second thermal expansion, the third thermal expansion, and the radial expansion of the steam generator shell. By measuring the horizontal displacement of the main steam pipe outside the steam generator compartment, the horizontal displacement of the steam generator is indirectly measured. This provides a method for measuring the horizontal displacement of a steam generator in a pebble bed modular high-temperature gas-cooled reactor under ambient temperature conditions. It improves the working environment of the measuring instrument, ensures the effectiveness of the displacement measurement, and solves the problem of the high-temperature environment inside the steam generator compartment affecting displacement measurement. This method fully considers the influence of the thermal expansion of the main steam pipe and the thermal expansion of the steam generator shell on the measurement results, achieving the requirements for measuring the horizontal displacement of the steam generator under hot operating conditions. Furthermore, it has been applied in verifying the effectiveness of the pressure vessel support system in a pebble bed modular high-temperature gas-cooled reactor. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of a high-temperature gas-cooled reactor steam generator according to one embodiment of the present disclosure;

[0046] Figure 2 This is a flowchart illustrating a method for measuring the horizontal displacement of a high-temperature gas-cooled reactor steam generator, as described in another embodiment of this disclosure.

[0047] Figure 3 This is a schematic diagram of the structure of a horizontal displacement measuring device for a high-temperature gas-cooled reactor steam generator in another embodiment of the present disclosure;

[0048] Figure 4 This is a schematic diagram of the structure of a displacement measuring device used to obtain the radial expansion of a steam generator casing in another embodiment of this disclosure;

[0049] Figure 5 This is a schematic diagram of the composition of an electronic device in another embodiment of the present disclosure. Detailed Implementation

[0050] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0051] like Figure 2 As shown, this disclosure provides a method S100 for measuring the horizontal displacement of a steam generator in a high-temperature gas-cooled reactor, applicable to a pebble bed modular high-temperature gas-cooled reactor, such as... Figure 1As shown, the steam generator 200 is connected to a main steam pipe, which extends radially through the steam generator compartment. The main steam pipe includes a first horizontal pipe 211 located inside the compartment, a transition horizontal pipe 212, a second horizontal pipe 213 located outside the compartment, and a vertical pipe 214 located outside the compartment, all connected in sequence. The transition horizontal pipe 212 is located inside the steam generator compartment wall 220, and a compartment penetration member 230 is fitted on the outer side of the transition horizontal pipe 212.

[0052] To ensure the effectiveness of the measurement and improve the working environment of the measuring instrument, the measurement of the horizontal displacement of the main steam nozzle of the steam generator was changed to the measurement of the expansion deformation of the bend section of the main steam pipeline.

[0053] like Figure 1 As shown, the horizontal displacement of the steam generator is indirectly measured by measuring the change in horizontal displacement of the vertical pipe 214 in the main steam pipeline within the process room where the main steam pipeline passes through the steam generator compartment.

[0054] like Figure 2 As shown, the horizontal displacement measurement method S100 of the high-temperature gas-cooled reactor steam generator according to an embodiment of this disclosure includes:

[0055] S110. Obtain the horizontal displacement of the vertical pipe, the first thermal expansion of the first horizontal pipe, the second thermal expansion of the second horizontal pipe, the third thermal expansion of the compartment penetration, and the radial expansion of the steam generator shell.

[0056] For example, obtaining the horizontal displacement of the vertical pipe includes:

[0057] The horizontal displacement of vertical pipe 214 is calculated using the following formula:

[0058] ΔL=L12-L11,

[0059] Wherein, ΔL is the horizontal displacement of the vertical pipe 214, L12 is the second displacement of the vertical pipe 214 of the steam generator 200 in the target state, and L11 is the first displacement of the vertical pipe 214 of the steam generator 200 in the initial state.

[0060] Specifically, such as Figure 1 As shown, a fixed bracket 240 is installed at the corresponding vertical pipe 214, and a high-precision first displacement sensor 250 is installed on the fixed bracket 240 at the corresponding position of the vertical pipe 214. The horizontal displacement of the steam generator vertical pipe 214 is measured by the first displacement sensor 250 using the contact method.

[0061] It should be noted that the displacement measuring instrument is not limited to a displacement sensor, and other displacement measuring instruments can be selected according to actual needs. This embodiment does not make specific limitations.

[0062] First, before the primary loop system is heated and pressurized, record the temperature at the main steam nozzle of the steam generator and the pressure of the primary loop system to determine the starting point for measuring the horizontal displacement of the steam generator. That is, determine the initial state of the steam generator 200 and record the initial reading L11 of the first displacement sensor 250, which means obtaining the first displacement L11 of the vertical pipe 214 of the steam generator 200 in the initial state.

[0063] It should be noted that this embodiment does not specifically limit the initial temperature and pressure of the steam generator, and can be selected according to different operating conditions.

[0064] Secondly, when the steam generator reaches the target state, the reading L12 of the first displacement sensor 250 is recorded, which is to obtain the second displacement L11 of the vertical pipe 214 of the steam generator 200 when it reaches the target state. In this embodiment, the steam generator reaches the target state when the primary loop system reaches the highest test platform. That is, after the primary loop system reaches the highest test platform, the reading L12 of the first displacement sensor 250 is recorded.

[0065] It should be noted that, in this embodiment, the target state of the steam generator can be set according to different operating conditions, and this embodiment does not impose any specific limitations.

[0066] Next, based on the degrees L11 and L12 recorded successively by the first displacement sensor 250, the horizontal displacement ΔL of the vertical pipe is calculated according to the formula ΔL=L12-L11.

[0067] For example, obtaining the first thermal expansion of the first horizontal tube includes:

[0068] The first thermal expansion of the first horizontal tube 211 is calculated according to the following formula;

[0069] L1 = α × La × ΔT1,

[0070] Where L1 is the first thermal expansion, α is the expansion coefficient, La is the length of the first horizontal pipe 211, and ΔT1 is the maximum temperature difference of the first horizontal pipe 211 from the initial state to the target state of the steam generator 200.

[0071] Specifically, firstly, such as Figure 1 As shown, thermal resistors are evenly distributed on the first horizontal pipe 211 located inside the cabin for temperature measurement.

[0072] Secondly, record the readings t of each thermal resistor on the first horizontal pipe 211 of the steam generator 200 in the initial state. 1a t 2a t 3a…Record the readings T of each thermal resistor on the first horizontal pipe 211 when the steam generator 200 is in the target state. 1a T 2a T 3a …In other words, when the primary loop system reaches its highest test platform, the readings T of each thermal resistor on the first horizontal tube 211 are recorded. 1a T 2a T 3a …From the readings of each thermal resistor recorded in the initial and target states, find the maximum and minimum temperature values, and calculate the maximum temperature difference ΔT1 of the first horizontal tube 211 from the initial state to the target state.

[0073] Next, measure the length La of the first horizontal tube 211.

[0074] Finally, based on the coefficient of thermal expansion, the length of the first horizontal tube 211, and the maximum temperature difference of the first horizontal tube 211, that is, according to the formula L1=α×La×ΔT1, the first thermal expansion L1 of the first horizontal tube 211 is calculated.

[0075] For example, obtaining the second thermal expansion of the second horizontal tube includes:

[0076] The second thermal expansion of the second horizontal tube 213 is calculated using the following formula:

[0077] L2 = α × Lb × ΔT2,

[0078] Where L2 is the second thermal expansion, α is the expansion coefficient, Lb is the length of the second horizontal tube, and ΔT2 is the maximum temperature difference of the second horizontal tube of the steam generator from the initial state to the target state.

[0079] Specifically, firstly, such as Figure 2 As shown, thermal resistors are evenly distributed on the second horizontal pipe 213 located outside the cabin for temperature measurement.

[0080] Next, record the readings t of each thermal resistor on the second horizontal pipe 213 of the steam generator 200 in the initial state. 1b t 2b t 3b …Record the readings T of each thermal resistor on the second horizontal pipe 213 when the steam generator 200 is in the target state. 1b T 2b T 3b …In other words, when the primary loop system reaches its highest test plateau, the readings T of each thermal resistor on the second horizontal tube 213 are recorded. 1b T 2b T 3b…From the readings of each thermal resistor recorded in the initial and target states, find the maximum and minimum temperature values, and calculate the maximum temperature difference ΔT2 of the second horizontal tube 213 from the initial state to the target state.

[0081] Next, measure the length Lb of the second horizontal tube 213.

[0082] Finally, based on the coefficient of thermal expansion, the length of the second horizontal tube 213, and the maximum temperature difference between the second horizontal tube 213 and the second horizontal tube 213, that is, according to the formula L2=α×Lb×ΔT2, the second thermal expansion L2 of the second horizontal tube 213 is calculated.

[0083] For example, obtaining the third thermal expansion of the compartment penetration includes:

[0084] The third thermal expansion of the compartment penetration 230 is calculated using the following formula:

[0085] L3 = α × Lc × ΔT3

[0086] Where L3 is the third thermal expansion, α is the expansion coefficient, Lc is the length of the compartment penetration 230, and ΔT3 is the maximum temperature difference of the steam generator from the initial state to the target state of the compartment penetration 230.

[0087] Specifically, as described above, it is necessary to uniformly distribute thermal resistors on the first horizontal pipe 211 and the second horizontal pipe 213 for temperature measurement. Since the compartment penetration 230 is embedded within the steam generator compartment wall 220, it is impossible to distribute thermal resistors directly on the compartment penetration 230 for temperature measurement. Instead, thermal resistors can be distributed along the end of the first horizontal pipe 211 inside the compartment towards the end of the compartment penetration 230 to measure the temperature of the first end of the compartment penetration 230. Similarly, thermal resistors can be distributed along the end of the second horizontal pipe 213 outside the compartment towards the end of the compartment penetration 230 to measure the temperature of the second end of the compartment penetration 230. Because the first end of the compartment penetration 230 is located inside the compartment and has the highest temperature, while the second end is located outside the compartment and has the lowest temperature, the maximum temperature difference ΔT3 of the compartment penetration 230 from the initial state to the target state of the steam generator can be obtained based on the temperatures of the first and second ends of the compartment penetration 230.

[0088] The length Lc of the compartment penetration 230 is measured, which is also the thickness of the steam generator compartment wall 220.

[0089] Based on the expansion coefficient of the material of the compartment penetration 230, the length of the compartment penetration 230, and the maximum temperature difference of the compartment penetration 230, that is, according to the formula L3=α×Lc×ΔT3, the third thermal expansion L3 of the compartment penetration 230 is calculated.

[0090] For example, obtaining the radial expansion of the steam generator housing includes:

[0091] A displacement measuring device 300 is installed on the inner side wall 260 of the steam generator compartment, perpendicular to the horizontal displacement direction of the steam generator 200.

[0092] The radial expansion Lr of the steam generator 200 shell is obtained directly by displacement measuring device 300.

[0093] Specifically, such as Figure 3 As shown, the displacement measuring device 300 is disposed on the inner side wall 260 of the steam generator compartment corresponding to the steam generator 200. The displacement measuring device 300 includes a fixing plate 310, a second displacement sensor 320, a pulley assembly 330, a lead wire 340, and a weight block 350. This displacement measuring device makes full use of the design of having a cooling water pipe (not shown in the figure) installed in the inner side wall of the steam generator compartment to indirectly transfer the heat of the second displacement sensor 320 to the cooling water pipe.

[0094] The second displacement sensor 320 and the pulley assembly 330 are fixed to the fixed plate 310.

[0095] It should be noted that, in this embodiment, the fixing plate 310 can be a metal fixing plate. Specifically, the metal fixing plate is welded to the annular steel strip on the inner side wall 260 of the steam generator compartment. The fixing plate 310 is used to fix the second displacement sensor 320 and its matching pulley assembly 330, and to provide a heat conduction path for the second displacement sensor 320.

[0096] The first end of the lead wire 340 is used to fix it to a preset displacement measurement point of the steam generator 200, and the second end of the lead wire 340 passes through the pulley assembly 330 and is fixedly connected to the weight block 350.

[0097] It should be noted that in this embodiment, a high-temperature magnet 360 is adsorbed at a preset displacement measurement point of the steam generator 200, and the first end of the lead wire 340 is fixed at the preset displacement measurement point by the high-temperature magnet 360.

[0098] It should be noted that the weight block 350 can be a counterweight, meaning that the second end of the lead wire 340 is suspended from the counterweight to ensure that the lead wire 340 maintains a certain tension. The second end of the lead wire 140 passes through the pulley assembly 330 to convert the second displacement sensor 320 into a vertical arrangement, which can further move the second displacement sensor 320 away from the heat source.

[0099] like Figure 3As shown, the measuring end of the second displacement sensor 320 is connected to the lead wire 340 and is used to measure the displacement change of the lead wire 340 at a preset displacement measuring point, thereby measuring the displacement change of the steam generator 200 at the preset displacement measuring point. In other words, the displacement change of the steam generator 200 at the preset displacement measuring point is indirectly obtained by measuring the displacement change of the lead wire 140 at the preset displacement measuring point through the second displacement sensor 320.

[0100] The displacement measuring device in the above embodiments does not require the second displacement sensor 320 to be placed directly on the surface of the steam generator 200 for displacement measurement. This ensures the reliability of the second displacement sensor 320 even when its allowable operating temperature limit is exceeded. It can also keep the displacement sensor away from heat sources such as the steam generator 200, reducing the temperature at which the displacement measuring device 300 is heated. This allows the second displacement sensor 320, with a temperature limit of 210°C, to perform remote measurements in an environment close to 250°C, solving the technical challenge of displacement measurement in the hot operating conditions of the primary loop steam generator of the high-temperature reactor.

[0101] For example, such as Figure 3 As shown, the second displacement sensor 320 is fixed to the fixing plate 310 along its length. Fixing the second displacement sensor 320 to the fixing plate 310 along its length serves two purposes: firstly, by changing the arrangement of the second displacement sensor 320, it can be moved away from the heat source, reducing the heating of the second displacement sensor 320; secondly, with the length direction of the second displacement sensor 320 parallel to the cooling water pipe, the heat generated by the second displacement sensor 320 can be transferred to the cooling water pipe to the greatest extent.

[0102] For example, such as Figure 3 As shown, the high-temperature reactor pressure vessel displacement measuring device 100 also includes a heat insulation cover 370, which covers the second displacement sensor 320. The heat insulation cover 160 can be used to reduce the convective heat transfer efficiency between the hot airflow in the steam generator compartment and the second displacement sensor 320, thereby reducing the temperature of the second displacement sensor 320 and increasing the reliability of the second displacement sensor 320.

[0103] In this embodiment, a displacement measuring device 300 is installed on the inner sidewall 260 of the steam generator compartment perpendicular to the horizontal displacement direction of the steam generator 200. The displacement measuring device 300 measures the distance difference between the steam generator 200 shell and the inner sidewall 260 of the steam generator compartment in the initial state and the target state, so that the radial expansion amount Lr of the steam generator 200 shell can be directly obtained.

[0104] S120. The horizontal displacement of the steam generator is calculated based on the horizontal displacement of the vertical pipe, the first thermal expansion, the second thermal expansion, the third thermal expansion, and the radial expansion of the steam generator shell.

[0105] Specifically, the horizontal displacement L of the steam generator 200 is calculated according to the following formula:

[0106] L=ΔL-L1-L2-L3-Lr,

[0107] Where ΔL is the horizontal displacement of the vertical pipe 214, L1 is the first thermal expansion, L2 is the second thermal expansion, L3 is the third thermal expansion, and Lr is the radial expansion of the steam generator shell.

[0108] For example, after calculating the horizontal displacement of the steam generator, the method further includes:

[0109] The effectiveness of the primary pressure vessel support system is determined based on the horizontal displacement of the steam generator.

[0110] If the horizontal displacement of the steam generator exceeds the preset displacement, the primary pressure vessel support system is abnormal and needs to be adjusted.

[0111] If the horizontal displacement of the steam generator does not exceed the preset displacement, the primary pressure vessel support system is normal, that is, the primary pressure vessel support system is effective.

[0112] The method for measuring the horizontal displacement of a high-temperature gas-cooled reactor steam generator according to this disclosure indirectly measures the horizontal displacement of the steam generator by measuring the horizontal displacement of the main steam pipe outside the steam generator compartment. This method provides a way to measure the horizontal displacement of a pebble bed modular high-temperature gas-cooled reactor steam generator under ambient temperature conditions, improving the working environment of the measuring instrument, ensuring the effectiveness of the displacement measurement, and solving the problem of the high-temperature environment inside the steam generator compartment affecting displacement measurement. This method fully considers the influence of the thermal expansion of the main steam pipe and the thermal expansion of the steam generator shell on the measurement results, achieving the requirements for measuring the horizontal displacement of the steam generator under hot operating conditions. Furthermore, it has been applied in verifying the effectiveness of the pressure vessel support system in a pebble bed modular high-temperature gas-cooled reactor.

[0113] like Figure 4As shown, another aspect of this disclosure provides a horizontal displacement measuring device 100 for a high-temperature gas-cooled reactor steam generator, applied to a pebble bed modular high-temperature gas-cooled reactor. The steam generator 200 is connected to a main steam pipe, which extends through the steam generator compartment along the diameter of the steam generator 200. The main steam pipe includes a first horizontal pipe 211 located inside the compartment, a transition horizontal pipe 212, a second horizontal pipe 213 located outside the compartment, and a vertical pipe 214 located outside the compartment, connected in sequence. The transition horizontal pipe 212 is located within the steam generator compartment wall 220, and a compartment penetration member 230 is sleeved on the outer side of the transition horizontal pipe 212. The device 100 includes:

[0114] The acquisition module 110 is used to acquire the horizontal displacement of the vertical pipe 214, the first thermal expansion of the first horizontal pipe 211, the second thermal expansion of the second horizontal pipe 213, the third thermal expansion of the compartment penetration 230, and the radial expansion of the steam generator shell.

[0115] Specifically, the acquisition module 110 acquires the horizontal displacement ΔL of the vertical pipe 214, the first thermal expansion L1 of the first horizontal pipe 211, the second thermal expansion L2 of the second horizontal pipe 213, the third thermal expansion L3 of the compartment penetration 230, and the radial expansion Lr of the steam generator shell.

[0116] It should be noted that the acquisition module 110 can be a displacement sensor or a displacement measuring device. For example, the horizontal displacement ΔL of the vertical pipe 214 can be directly measured by a displacement sensor, and the radial expansion Lr of the steam generator shell can be directly measured by a displacement measuring device. The acquisition module 110 can also indirectly obtain the first thermal expansion L1 of the first horizontal pipe 211, the second thermal expansion L2 of the second horizontal pipe 213, the third thermal expansion L3 of the compartment penetration 230, etc., by measuring the temperature with a thermal resistor and the length with a measuring ruler. The acquisition module 110 can be selected according to actual needs, and this embodiment does not impose specific limitations.

[0117] It should be further explained that the methods and steps for obtaining the above parameters have been described in detail above, and will not be repeated here.

[0118] The calculation module 120 is used to calculate the horizontal displacement of the steam generator based on the horizontal displacement of the vertical pipe 214, the first thermal expansion, the second thermal expansion, the third thermal expansion, and the radial expansion of the steam generator shell. The calculation module 120 can be a processor such as a CPU, and can be selected as needed; this embodiment does not impose specific limitations.

[0119] Specifically, the calculation module 120 calculates the horizontal displacement L of the steam generator 200 according to the following formula:

[0120] L=ΔL-L1-L2-L3-Lr,

[0121] Where ΔL is the horizontal displacement of the vertical pipe 214, L1 is the first thermal expansion, L2 is the second thermal expansion, L3 is the third thermal expansion, and Lr is the radial expansion of the steam generator shell.

[0122] The horizontal displacement measuring device for a high-temperature gas-cooled reactor steam generator according to an embodiment of this disclosure.

[0123] This device can measure the horizontal displacement of the main steam pipe outside the steam generator compartment, indirectly measuring the horizontal displacement of the steam generator. It improves the working environment of the measuring instrument, ensures the effectiveness of the displacement measurement, and solves the problem of the high-temperature environment inside the steam generator compartment affecting displacement measurement. This method fully considers the influence of the thermal expansion of the main steam pipe and the thermal expansion of the steam generator shell on the measurement results, realizing the requirement of measuring the horizontal displacement of the steam generator under hot conditions. It has been applied to verify the effectiveness of the pressure vessel support system in a pebble bed modular high-temperature gas-cooled reactor.

[0124] like Figure 5 As shown, another aspect of this disclosure provides an electronic device 400, including:

[0125] One or more processors 410 and one or more storage units 420 are provided. The storage units 420 are used to store one or more programs. When the one or more programs are executed by the one or more processors 410, they enable the one or more processors to implement the data recording method described above. The electronic device 400 also includes one or more input units 430 and one or more output units 440, etc. These components of the electronic device 400 are interconnected via a bus system 450 and / or other forms of connection mechanisms. It should be noted that... Figure 5 The components and structure of the electronic device 400 shown are merely exemplary and not limiting. The electronic device 400 may also have other components and structures as needed.

[0126] The processor 410 may be a central processing unit (CPU) or other form of processing unit with data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device 400 to perform desired functions.

[0127] Storage unit 420 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, which a processor may execute to implement the client functions (implemented by the processor) in the embodiments of the present invention described below, and / or other desired functions. Various applications and various data may also be stored in the computer-readable storage medium, such as various data used and / or generated by the applications.

[0128] The input unit 430 may be a device used by a user to input instructions, and may include one or more of the following: keyboard, mouse, microphone, touch buttons, and touch screen.

[0129] The output unit 440 can output various information (such as images or sounds) to the outside (e.g., a user) and may include one or more of a display, a speaker, etc.

[0130] Another aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, can implement the data recording method described above.

[0131] The computer-readable medium may be included in the apparatus, device, or system of the present invention, or it may exist independently.

[0132] The computer-readable storage medium may be any tangible medium that contains or stores a program, and may be an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device. More specific examples include, but are not limited to, electrical connections having one or more wires, portable computer disks, hard disks, optical fibers, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0133] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the embodiments of this disclosure, and the embodiments of this disclosure are not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the embodiments of this disclosure, and these modifications and improvements are also considered to be within the protection scope of the embodiments of this disclosure.

Claims

1. A method for measuring the horizontal displacement of a steam generator in a high-temperature gas-cooled reactor, applied to a pebble bed modular high-temperature gas-cooled reactor, wherein the steam generator is connected to a main steam pipe, the main steam pipe extending radially through the steam generator compartment, the main steam pipe comprising, in sequence, a first horizontal pipe located inside the compartment, a transition horizontal pipe, a second horizontal pipe located outside the compartment, and a vertical pipe located outside the compartment, wherein a compartment penetration member is sleeved on the outer side of the transition horizontal pipe, characterized in that, The method includes: The horizontal displacement of the vertical pipe, the first thermal expansion of the first horizontal pipe, the second thermal expansion of the second horizontal pipe, the third thermal expansion of the compartment penetration, and the radial expansion of the steam generator shell are obtained respectively; specifically including: The horizontal displacement of the vertical pipe is calculated using the following formula: ΔL = L12 - L11, Wherein, ΔL is the horizontal displacement of the vertical pipe, L12 is the second displacement of the vertical pipe when the steam generator is in the target state, and L11 is the first displacement of the vertical pipe when the steam generator is in the initial state; The first thermal expansion of the first horizontal tube is calculated using the following formula: L1 = α × La × ΔT1, Wherein, L1 is the first thermal expansion, α is the expansion coefficient, La is the length of the first horizontal tube, and ΔT1 is the maximum temperature difference of the first horizontal tube of the steam generator from the initial state to the target state. The second thermal expansion of the second horizontal tube is calculated using the following formula: L2 = α × Lb × ΔT2, Wherein, L2 is the second thermal expansion, α is the expansion coefficient, Lb is the length of the second horizontal tube, and ΔT2 is the maximum temperature difference of the second horizontal tube of the steam generator from the initial state to the target state. The third thermal expansion of the compartment penetration component is calculated using the following formula: L3 = α × Lc × ΔT3, Wherein, L3 is the third thermal expansion, α is the expansion coefficient, Lc is the length of the compartment penetration, and ΔT3 is the maximum temperature difference of the compartment penetration from the initial state to the target state of the steam generator. The horizontal displacement of the steam generator is calculated based on the horizontal displacement of the vertical pipe, the first thermal expansion, the second thermal expansion, the third thermal expansion, and the radial expansion of the steam generator shell; specifically including: The horizontal displacement L of the steam generator is calculated using the following formula: L = ΔL - L1 - L2 - L3 - Lr, Wherein, ΔL is the horizontal displacement of the vertical pipe, L1 is the first thermal expansion, L2 is the second thermal expansion, L3 is the third thermal expansion, and Lr is the radial expansion of the steam generator shell.

2. The method according to claim 1, characterized in that, The process of obtaining the radial expansion of the steam generator casing includes: A displacement measuring device is installed on the inner side wall of the steam generator compartment, perpendicular to the horizontal displacement direction of the steam generator. The radial expansion of the steam generator shell is directly measured by the displacement measuring device.

3. The method according to claim 1, characterized in that, After calculating the horizontal displacement of the steam generator, the method further includes: The effectiveness of the primary pressure vessel support system is determined based on the horizontal displacement of the steam generator; wherein... If the horizontal displacement of the steam generator exceeds the preset displacement, the primary pressure vessel support system is abnormal. If the horizontal displacement of the steam generator does not exceed the preset displacement, the primary pressure vessel support system is normal.

4. A horizontal displacement measuring device for a steam generator in a high-temperature gas-cooled reactor, applied to a pebble bed modular high-temperature gas-cooled reactor, wherein the steam generator is connected to a main steam pipe, the main steam pipe extending radially through the steam generator compartment, the main steam pipe comprising, in sequence, a first horizontal pipe located inside the compartment, a transition horizontal pipe, a second horizontal pipe located outside the compartment, and a vertical pipe located outside the compartment, wherein a compartment penetration member is sleeved on the outer side of the transition horizontal pipe, characterized in that, The device includes: The acquisition module is used to acquire, respectively, the horizontal displacement of the vertical pipe, the first thermal expansion of the first horizontal pipe, the second thermal expansion of the second horizontal pipe, the third thermal expansion of the compartment penetration, and the radial expansion of the steam generator shell; wherein, The acquisition module is further configured to calculate the horizontal displacement of the vertical pipe according to the following formula: ΔL = L12 - L11, Wherein, ΔL is the horizontal displacement of the vertical pipe, L12 is the second displacement of the vertical pipe when the steam generator is in the target state, and L11 is the first displacement of the vertical pipe when the steam generator is in the initial state; and, It is also used to calculate the first thermal expansion of the first horizontal tube according to the following formula: L1 = α × La × ΔT1, Wherein, L1 is the first thermal expansion, α is the expansion coefficient, La is the length of the first horizontal tube, and ΔT1 is the maximum temperature difference of the first horizontal tube of the steam generator from the initial state to the target state; and... It is also used to calculate the second thermal expansion of the second horizontal tube according to the following formula: L2 = α × Lb × ΔT2, Wherein, L2 is the second thermal expansion, α is the expansion coefficient, Lb is the length of the second horizontal tube, and ΔT2 is the maximum temperature difference of the second horizontal tube of the steam generator from the initial state to the target state; and... It is also used to calculate the third thermal expansion of the compartment penetration member according to the following formula: L3 = α × Lc × ΔT3, Wherein, L3 is the third thermal expansion, α is the expansion coefficient, Lc is the length of the compartment penetration, and ΔT3 is the maximum temperature difference of the compartment penetration from the initial state to the target state of the steam generator. The calculation module is used to calculate the horizontal displacement of the steam generator based on the horizontal displacement of the vertical pipe, the first thermal expansion, the second thermal expansion, the third thermal expansion, and the radial expansion of the steam generator shell; wherein, The calculation module is also used to calculate the horizontal displacement L of the steam generator according to the following formula: L = ΔL - L1 - L2 - L3 - Lr, Wherein, ΔL is the horizontal displacement of the vertical pipe, L1 is the first thermal expansion, L2 is the second thermal expansion, L3 is the third thermal expansion, and Lr is the radial expansion of the steam generator shell.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it can implement the method of any one of claims 1 to 3.

Images