Spiral heating pipe type radiation-resistant heating test system and method

Abstract

The invention discloses a spiral heating tube type radiation-resistant heating test system and method, the structure of the test system is optimized by adopting an electric heating form, so that the structure of the test system is simpler, and the problem that the signal acquisition of a detector is inaccurate due to the fact that a traditional electric heating coil generates a magnetic field is solved. The technical scheme comprises a test device, a heating coil power supply, a data acquisition system and a detector power supply. The detector power supply is respectively connected with the standard detector and a detector to be identified in the test device; the data acquisition system is respectively connected with the standard detector, the detector to be identified and the heating coil power supply; the to-be-identified detector is arranged in the inner-layer sleeve, and temperature sensors are uniformly distributed on the side surface of the to-be-identified detector; the interlayer is arranged on the outer side of the inner-layer sleeve, an interlayer medium is arranged in the interlayer, an outer-layer sleeve is arranged on the outer side of the interlayer, and double heating coils are arranged on the outer-layer sleeve.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power plant detectors, and in particular relates to a spiral heating tube type radiation resistance heating test system and method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] As a type of micro reactor, the heat pipe micro reactor transfers the heat generated by the reactor core to the nuclear thermal propulsion system or thermoelectric conversion device through the evaporation, condensation and natural circulation of the working fluid inside the heat pipe. The reactor is solid-state and does not require traditional primary-loop equipment, making it simpler and more compact as a whole. Heat pipe reactors are miniaturized and solid-state. In order to obtain a sufficiently large neutron injection rate signal, the ex-core detectors in the ex-core nuclear measurement system need to be close to the reactor core, which makes the ambient temperature of the ex-core detectors very high, resulting in the inability of traditional standard detectors to adapt to the environment of heat pipe reactors.

[0004] In order to develop an off-pile detector with heat resistance, it is necessary to conduct heating experiments on the detector and adjust the detector based on the experimental data. Common forms of heating are electric heating and flowing medium heating. Flowing medium heating requires a heating device and pipelines, and its structure is very complex, while the electric heating structure is relatively simple. However, the spiral heating wire will generate a certain magnetic field during the electric heating process. The core function of the detector is to convert the radiation signal into an electrical signal. Any interference from the external magnetic field may lead to inaccurate data, resulting in the problem of inaccurate detector signal acquisition caused by traditional heating coils. Summary of the invention

[0005] In view of the above problems, the present invention provides a spiral heating tube type radiation resistance heating test system and method, which optimizes the structure of the test system by electric heating, making the structure of the test system simpler. At the same time, by setting up double heating coils in series, the magnetic fields can offset each other, solving the problem of inaccurate detector signal acquisition due to the generation of magnetic fields by traditional electric heating coils.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] In a first aspect, the present invention provides a spiral heating tube type radiation resistance heating test system, including a test device, a standard detector, a reactor core, a shielding structure, a heating coil power supply, a data acquisition system and a detector power supply;

[0008] The test device also includes an inner sleeve, an interlayer, an outer sleeve and an interlayer medium; the inner sleeve is used to place the detector to be identified, and temperature sensors are evenly distributed on the inner side of the inner sleeve; a detector positioning structure is provided at the inner bottom of the inner sleeve, and the detector positioning structure is fixedly connected to the inner sleeve, and the detector positioning structure is used to position the detector to be identified; the interlayer is provided on the outer side of the inner sleeve, and the interlayer medium is provided in the interlayer, and the outer sleeve is provided on the outer side of the interlayer, and a double heating coil is provided on the outer sleeve;

[0009] The detector power supply is used to power the standard detector and the detector to be identified; the data acquisition system is used to collect signals from the standard detector, the detector to be identified and the temperature sensor, and is used to control the current output of the heating coil power supply; the heating coil power supply, the data acquisition system and the detector power supply are all arranged in the shielding structure.

[0010] Furthermore, the dual heating coil is composed of a first coil and a second coil, and the first coil is connected in series with the second coil, so that the current flows in opposite directions in the first coil and the second coil.

[0011] Furthermore, the first coil and the second coil are both spirally wound on the outer side of the outer sleeve.

[0012] Furthermore, the detector power supply is connected to the standard detector via a cable, and the cable is a radiation-resistant cable with radiation resistance. The cable is also used to connect the detector power supply and the detector to be identified.

[0013] Furthermore, the heating coil power supply is connected to the dual heating coils via a radiation-resistant cable.

[0014] Furthermore, the data acquisition system is connected to the standard detector and the heating coil power supply via the cable, and the cable is also used to connect the data acquisition system and the detector to be identified.

[0015] Furthermore, the interlayer medium is a high boiling point medium.

[0016] Furthermore, the heating coil power supply adopts a high-frequency pulse heating power supply.

[0017] In a second aspect, the present invention further provides a working method of a spiral heating tube type radiation resistance heating test system, comprising the following steps:

[0018] S1. Keep the reactor core shut down, and install and connect the spiral heating tube type radiation resistance heating test system;

[0019] S2, turning on the power supply of the detector, so that the standard detector and the detector to be identified are in normal working state; configuring the data acquisition system, and starting to continuously collect signals from the standard detector, the temperature sensor and the detector to be identified;

[0020] S3, starting the reactor core until the expected operating condition is reached, keeping the reactor core in steady-state operation, turning on the heating device, turning on the power supply of the heating coil, at which time the dual heating coils begin to be energized to start heating the interlayer medium in the interlayer;

[0021] S4, continue heating, and when the expected temperature is reached, keep the reactor core and temperature stable, and continue to collect data from the standard detector, the detector to be identified, and the temperature sensor until the time requirement of the identification test is met;

[0022] S5, maintaining the steady-state operation of the reactor core, turning off the power supply of the heating coil to reduce the temperature; when the data acquisition system shows that the temperature of the temperature sensor has dropped to a temperature close to the initial temperature, collecting data for a required time, and then reducing the reactor power until the reactor stops;

[0023] S6. After the reactor stops, stop collecting signals from the standard detector, temperature sensor and detector to be identified, compare and analyze the signal data of the detector to be identified from the dimensions of radiation field intensity and temperature, perform data evaluation according to the identification test requirements, and identify the detector to be identified.

[0024] Furthermore, when the temperature sensor detects that the temperature reaches the required temperature, the heating coil power supply stops providing pulse current to the dual heating coils. When the temperature sensor detects that the temperature is lower than the required temperature, the heating coil power supply continues to provide pulse current to the dual heating coils, and the heating process continues to repeat the above process.

[0025] Compared with the prior art, the present invention has the following advantages and positive effects:

[0026] The present invention adopts the design of indirect heating detector and the design of double heating coil, which has the effect of magnetic field offsetting, ensuring that no magnetic field interference affecting the electrical signal is generated during the heating process; the heating is completed by the double heating coils on the inner wall of the outer sleeve. The double heating coils transfer heat to the high-boiling-point interlayer medium in the interlayer, and after the medium is heated, the heat is evenly transferred to the inner sleeve, and further transferred to the detector to be identified. In this way, uniform heating of the detector to be identified can be achieved, avoiding changes in the performance of the detector to be identified due to local overheating or uneven cooling, and ensuring the accuracy of the test data.

[0027] In addition, the various components of the system of the present invention are connected by radiation-resistant cables, which ensures that the device is not damaged by radiation when operating in a research reactor; under the protection of the shielding structure, key electronic components such as the heating coil power supply, data acquisition system and detector power supply, as well as components that require human operation, are isolated from the high-irradiation environment of the reactor, which can reduce possible damage to them caused by the radiation field, thereby extending the service life of the equipment and ensuring the reliability of the equipment and the safety of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0029] Figure 1 It is a layout diagram of the test system and the reactor core of the present invention;

[0030] Figure 2 This is a layout diagram of the shielding structure of the present invention;

[0031] Figure 3 It is an axial cross-sectional view of the test device of the present invention.

[0032] In the figure: 1. Data acquisition system; 2. Detector power supply; 3. Standard detector; 4. Reactor core; 5. Test device; 5-1. Outer sleeve; 5-2. Interlayer; 5-3. Inner sleeve; 5-4. Temperature sensor; 5-5. Detector to be identified; 5-6. Positioning structure; 5-7. Interlayer medium; 5-8. First coil; 5-9. Second coil; 6. Radiation-resistant cable; 7. Heating coil power supply; 8. Shielding structure. DETAILED DESCRIPTION

[0033] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0035] During the research and development process, it is necessary to impose various extreme environments on the detector. These extreme environments are often determined by the environmental parameters of the detector under various working conditions of the heat pipe pile. If the detector can operate normally under these extreme environments, it can be considered that the detector can operate normally under the heat pipe pile environment. This type of research and development behavior is generally called identification. The medium circulation type radiation resistance heating test system described in this embodiment can be used to conduct on-pile tests in the vertical channel of the research reactor to verify the performance of the detector in high temperature and high radiation extreme environments.

[0036] This embodiment discloses a spiral heating tube type radiation resistance heating test system, such as Figure 1-Figure 2 As shown, it includes a test device 5, a standard detector 3, a shielding structure 8, a heating coil power supply 7, a data acquisition system 1 and a detector power supply 2; the detector power supply 2 is used to power the standard detector 3 and the detector 5-5 to be identified; the data acquisition system 1 is used to collect and compare the data of the standard detector 3 and the detector 5-5 to be identified, monitor the actual temperature distribution of the detector 5-5 to be identified, and control the heating process according to the actual temperature measurement results obtained, as well as control the output current of the heating coil power supply 7; the heating coil power supply 7, the data acquisition system 1 and the detector power supply 2 are all arranged in the shielding structure 8.

[0037] The test device 5 also includes an inner sleeve 5-3, an interlayer 5-2, an outer sleeve 5-1, a temperature sensor 5-4, a detector positioning structure 5-6, an interlayer medium 5-7, a first coil 5-8, and a second coil 5-9; Figure 1-Figure 2 As shown, the detector 5-5 to be identified is arranged in the inner sleeve 5-3, and the inner sleeve 5-3 is used to place the detector 5-5 to be identified. The inner side of the inner sleeve 5-3 is evenly distributed with temperature sensors 5-4. The outer side of the inner sleeve 5-3 is provided with the interlayer 5-2, and the interlayer medium 5-7 is provided in the interlayer 5-2. The interlayer medium 5-7 is a high boiling point medium. After being heated, the interlayer medium 5-7 transfers heat evenly to the inner sleeve, and further transfers it to the detector to be identified. The outer side of the interlayer 5-2 is provided with an outer sleeve 5-1, and the outer sleeve 5-2 is provided with a temperature sensor 5-4. -1 is provided with a double heating coil consisting of a first coil 5-8 and a second coil 5-9 connected in series. The double heating coil is a coil formed by bidirectionally winding the first coil 5-8 and the second coil 5-9 on the outer sleeve. The bidirectionally wound coils generate magnetic fields in opposite directions during the power-on process, which have a magnetic field offsetting effect, ensuring that the magnetic field that affects the electrical signal can be avoided during the heating process; the inner bottom of the inner sleeve 5-3 is provided with a detector positioning structure 5-6, and the detector positioning structure 5-6 is fixedly connected to the inner sleeve 5-3, and is used to limit the detector assembly from moving deeper to achieve the positioning function.

[0038] The detector power supply 2 is connected to the standard detector 3 and the detector to be identified 5-5 respectively, and the detector power supply 2 is connected to the standard detector 3 and the detector to be identified 5-5 through a cable, and the cable is a radiation-resistant cable 6 with radiation resistance; the data acquisition system 1 is connected to the standard detector 3, the temperature sensor 5-4, and the detector to be identified 5-5 through the radiation-resistant cable 6; the heating coil power supply 7 is connected to the dual heating coil through the radiation-resistant cable 6, and the heating coil power supply 7 can provide a stable pulse current for the dual heating coil. The dual heating coil consists of a first coil 5-8 and a second coil 5-9, and the first coil 5-8 and the second coil 5-9 are connected in series, so that the current flows in the first coil 5-8 and the second coil 5-9 in opposite directions, so that the magnetic fields generated by the bidirectional coils in the dual heating coils can offset each other.

[0039] The test device 5 is heated by the heating wire in the double heating coil. When the heating coil power supply 7 is turned on, the heating coil power supply 7 provides pulse current to the double heating coil, and the double heating coil converts electrical energy into thermal energy. At the same time, the magnetic fields generated by the bidirectional coils in the double heating coil can offset each other, ensuring that only heat is provided to the outside without generating magnetic field interference to the outside. The interlayer medium 5-7 gradually heats up under the action of the double heating coil, and then transfers the heat to the detector to be identified through the inner sleeve. When the temperature sensor detects that the temperature reaches the required temperature, the heating coil power supply 7 stops providing pulse current to the double heating coil. When the temperature sensor detects that the temperature is lower than the required temperature, the heating coil power supply 7 continues to provide pulse current to the double heating coil, and the heating process continues to repeat the above process.

[0040] The detector power supply 2 is connected to the standard detector 3 and the detector to be identified 5-5 through a radiation-resistant cable 6; the data acquisition system 1 is connected to the standard detector 3, the detector to be identified 5-5, and the heating coil power supply 7 through a radiation-resistant cable 6, which is used to provide high voltage, lead detector and temperature sensor 5-4 signals and other functions. Since the radiation-resistant cable 6 can work for a long time in a high-radiation environment, it is ensured that the device is not damaged by excessive radiation during the identification experiment. In addition, by isolating key electronic components such as the heating coil power supply 7, the data acquisition system 1 and the detector power supply 2, as well as components that require human operation from the high-irradiation environment of the reactor, under the protection of the shielding structure 8, the damage that may be caused to them by the radiation field can be reduced, ensuring the reliability of the equipment and the safety of personnel.

[0041] The standard detector 3 is used to monitor the operating status of the reactor during the entire identification experiment. The standard detector 3 and the detector to be identified 5-5 are respectively installed on the multifunctional bracket outside the reactor core 4, and the standard detector 3 and the detector to be identified 5-5 are arranged opposite to each other, so the standard detector 3 will not be affected by high temperature, and there is generally no other structural obstruction outside the standard detector 3, which can make the measurement of the operating status of the reactor core 4 more accurate and eliminate the influence of high temperature and other structural obstructions. The detector power supply 2 is used to provide bias voltage to the standard detector 3 and the detector to be identified 5-5 to keep them in working state. The data acquisition system 1 simultaneously monitors the output signals of the standard detector 3, the detector to be identified 5-5 and the temperature sensor 5-4, and evaluates the performance of the detector to be identified 5-5 in a high temperature and high radiation environment by comparing the output signals of the two.

[0042] Working method:

[0043] S1. Keep the reactor core 4 shut down, and install and connect the spiral heating tube type radiation resistance heating test system.

[0044] S2. Turn on the detector power supply 2, so that the standard detector 3 and the detector to be identified 5-5 are in normal working state; configure the data acquisition system 1, and start to continuously collect the signals of the standard detector 3, the temperature sensor 5-4 and the detector to be identified 5.

[0045] S3. Start the reactor core 4 until the expected operating condition is reached. When the expected operating condition is reached, both the standard detector 3 and the detector to be identified 5-5 output radiation field measurement signals. Keep the reactor core 4 in steady-state operation and turn on the heating coil power supply 7. At this time, the double heating coil composed of the first coil 5-8 and the second coil 5-9 connected in series begins to be energized. Since the present invention adopts the design of double heating coils, the magnetic field generated by the energization will be offset and will not affect the detector electrical signal. The signal change of the detector to be identified can be considered to be caused by temperature change.

[0046] S4. Continue heating. Since the interlayer medium 5-7 uses a high boiling point medium, the surface temperature of the detector to be identified 5-5 can be obtained in the data acquisition system 1 at this time. When the expected temperature is reached, the negative feedback design can be used to maintain the temperature stability; keep the reactor core 4 and temperature stable, and continue to collect data from the standard detector 3, the detector to be identified 5-5 and the temperature sensor 5-4 until the time requirement for the identification test is met.

[0047] S5. Maintain the steady-state operation of the reactor core and turn off the power supply of the heating coil 7 to reduce the temperature; when the data acquisition system shows that the temperature of the temperature sensor has dropped to a temperature close to the initial temperature, collect data for the required time, and then reduce the reactor power until it is shut down.

[0048] S6. After the reactor stops, stop collecting signals from the standard detector 3, temperature sensor 5-4 and detector 5-5 to be identified, and compare and analyze the signal data of the detector 5-5 to be identified from the radiation field intensity dimension and the temperature dimension. At this time, the data of the standard detector 3 is used as the benchmark for evaluation of the radiation field intensity dimension, and the data of the temperature sensor 5-4 is used as the benchmark for evaluation of the temperature dimension; perform data evaluation according to the identification test requirements, and identify the detector 5-5 to be identified.

[0049] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A spiral heating tube type radiation resistance heating test system, characterized in that: Includes test equipment, standard detectors, reactor core, shielding structure, heating coil power supply, data acquisition system and detector power supply; The test device also includes an inner sleeve, an interlayer, an outer sleeve and an interlayer medium; the inner sleeve is used to place the detector to be identified, and temperature sensors are evenly distributed on the inner side of the inner sleeve; a detector positioning structure is provided at the inner bottom of the inner sleeve, and the detector positioning structure is fixedly connected to the inner sleeve, and the detector positioning structure is used to position the detector to be identified; the interlayer is provided on the outer side of the inner sleeve, and the interlayer medium is provided in the interlayer, and the outer sleeve is provided on the outer side of the interlayer, and a double heating coil is provided on the outer sleeve; The detector power supply is used to power the standard detector and the detector to be identified; the data acquisition system is used to collect signals from the standard detector and the detector to be identified, and is used to control the current output of the heating coil power supply; the heating coil power supply, data acquisition system and detector power supply are all arranged in the shielding structure.

2. A spiral heating tube type radiation resistance heating test system as claimed in claim 1, characterized in that: The dual heating coil is composed of a first coil and a second coil, wherein the first coil and the second coil are connected in series, so that current flows in opposite directions in the first coil and the second coil.

3. A spiral heating tube type radiation resistance heating test system as claimed in claim 2, characterized in that: The first coil and the second coil are both spirally wound on the outer side of the outer sleeve.

4. A spiral heating tube type radiation resistance heating test system as claimed in claim 2, characterized in that: The detector power supply is connected to the standard detector via a cable. The cable is a radiation-resistant cable with radiation resistance. The cable is also used to connect the detector power supply and the detector to be identified.

5. A spiral heating tube type radiation resistance heating test system as claimed in claim 4, characterized in that: The heating coil power supply is connected to the dual heating coils via a radiation-resistant cable.

6. A spiral heating tube type radiation resistance heating test system as claimed in claim 2, characterized in that: The data acquisition system is connected to the standard detector and the heating coil power supply through the cable, and the cable is also used to connect the data acquisition system and the detector to be identified.

7. The spiral heating tube type radiation resistance heating test system according to claim 1, characterized in that: The interlayer medium is a high boiling point medium.

8. The spiral heating tube type radiation resistance heating test system according to claim 1, characterized in that: The heating coil power supply adopts a high-frequency pulse heating power supply.

9. The working method of the spiral heating tube type radiation resistance heating test system according to any one of claims 2 to 8, characterized in that: The following steps are involved: S1. Keep the reactor core shut down, and install and connect the spiral heating tube type radiation resistance heating test system; S2, turning on the power supply of the detector, so that the standard detector and the detector to be identified are in normal working state; configuring the data acquisition system, and starting to continuously collect signals from the standard detector, the temperature sensor and the detector to be identified; S3, starting the reactor core until the expected operating condition is reached, keeping the reactor core in steady-state operation, turning on the heating device, turning on the power supply of the heating coil, at which time the dual heating coils begin to be energized to start heating the interlayer medium in the interlayer; S4, continue heating, and when the expected temperature is reached, keep the reactor core and temperature stable, and continue to collect data from the standard detector, the detector to be identified, and the temperature sensor until the time requirement of the identification test is met; S5, maintaining the steady-state operation of the reactor core, turning off the power supply of the heating coil to reduce the temperature; when the data acquisition system shows that the temperature of the temperature sensor has dropped to a temperature close to the initial temperature, collecting data for a required time, and then reducing the reactor power until the reactor stops; S6. After the reactor stops, stop collecting signals from the standard detector, temperature sensor and detector to be identified, compare and analyze the signal data of the detector to be identified from the dimensions of radiation field intensity and temperature, perform data evaluation according to the identification test requirements, and identify the detector to be identified.

10. The working method of the spiral heating tube type radiation resistance heating test system according to claim 9, characterized in that: When the temperature sensor detects that the temperature reaches the required temperature, the heating coil power supply stops providing pulse current to the dual heating coils. When the temperature sensor detects that the temperature is lower than the required temperature, the heating coil power supply continues to provide pulse current to the dual heating coils, and the heating process continues to repeat the above process.

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