CN113029388A - Positioning device capable of improving positioning precision of reactor core detector assembly sensor - Google Patents
Positioning device capable of improving positioning precision of reactor core detector assembly sensor Download PDFInfo
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- CN113029388A CN113029388A CN202110205915.6A CN202110205915A CN113029388A CN 113029388 A CN113029388 A CN 113029388A CN 202110205915 A CN202110205915 A CN 202110205915A CN 113029388 A CN113029388 A CN 113029388A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T3/00—Measuring neutron radiation
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/08—Structural combination of reactor core or moderator structure with viewing means, e.g. with television camera, periscope, window
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a positioning device capable of improving positioning accuracy of a reactor core detector assembly sensor, which comprises a neutron sensor positioning tube, wherein a plurality of positioning sections which are arranged at intervals along the length direction of the neutron sensor positioning tube are arranged on the neutron sensor positioning tube, a lead cavity for wiring is arranged between every two adjacent positioning sections, and the positioning sections are tubular structures which are provided with through holes and the length of each through hole is greater than that of the neutron sensor. The device has simple structure, and the structural design of the device can improve the reliability and the measurement precision of the fixation of the detector on the reactor core detector assembly.
Description
Technical Field
The invention relates to the technical field of nuclear power station reactor core detector assemblies, in particular to a positioning device capable of improving positioning accuracy of a reactor core detector assembly sensor.
Background
The reactor core instrument system is a key system for measuring all parameters during the operation of the reactor, and the reactor core can be provided with various detectors such as a reactor core neutron measuring instrument, a reactor core outlet temperature measuring instrument and the like. Because the detector assembly needs to extend into the reactor core for monitoring, a long assembly is needed for realizing the monitoring; according to the monitoring needs, the number of monitoring points is different, for example, a neutron detector for a nuclear power station generally needs to measure neutron flux of 7 positions and 1-3 positions of temperature measurement. Therefore, the sensor leads in the module are long and large in number, and it is necessary to position the sensors in the detector module firmly and accurately in order to accurately measure the core outlet temperature, the temperature distribution in the core, the neutron flux distribution, and the like.
In the prior art, as described in the technical solution provided in the patent application with application number CN202010131374.2, three core measurement functions are integrated into one integrated detector assembly, and a nuclear reactor core neutron fluence rate, a nuclear reactor core fuel coolant outlet temperature, and a nuclear reactor core water level can be measured simultaneously.
The structural design of the reactor core detector assembly is further optimized, and the development of nuclear power technology in China is undoubtedly further promoted.
Disclosure of Invention
Aiming at the technical problem that the development of nuclear power technology in China can be further promoted undoubtedly by further optimizing the structural design of the reactor core detector assembly, the invention provides the positioning device capable of improving the positioning precision of the reactor core detector assembly sensor. The device has simple structure, and the structural design of the device can improve the reliability and the measurement precision of the fixation of the detector on the reactor core detector assembly.
Aiming at the problems, the positioning device capable of improving the positioning accuracy of the reactor core detector assembly sensor provided by the invention solves the problems through the following technical key points: can improve reactor core detector subassembly sensor positioning accuracy's positioner, including the neutron sensor registration arm, be provided with a plurality of location sections of arranging along neutron sensor registration arm length direction interval on the neutron sensor registration arm, be provided with the lead wire chamber that is used for the wiring between the adjacent location section, the location section is and is provided with the through-hole on it, and through-hole length is greater than the tubular structure of neutron sensor length.
The neutron sensor positioning tube provided by the scheme is used for restraining the neutron sensor, namely, the fixation of the neutron sensor on the neutron sensor positioning tube is realized. In the concrete structural design, the positioning section that sets up on the neutron sensor registration arm is as the concrete fixed position of neutron sensor, during concrete application, preferably adopts the fixed single neutron sensor's of single positioning section mode, like this, to the neutron measurement of different positions, this scheme of adoption only need all set up the positioning section in the relevant position of neutron sensor registration arm can.
Be different from traditional neutron sensor locate mode, in this scheme through-hole on the location section is as the neutron sensor fixed orifices, and sets up to through-hole length and be greater than neutron sensor length, and like this, the one end of definition neutron sensor is the wiring end, and the other end is the front end, through the lead wire chamber that sets up in this scheme, with the front end of neutron sensor as leading in end, can accomplish the neutron sensor and be in grafting in the through-hole, and concrete grafting position makes the both ends of neutron sensor all be located in the through-hole, then, adopt again to set up the solder joint between neutron sensor and neutron sensor registration arm, can accomplish the reliable fixed of neutron sensor. Thus, the positioning section in the scheme can provide side constraint for the neutron sensor, so that the neutron sensor is prevented from being influenced by vibration working conditions, displacement hidden danger exists in the neutron sensor, and the purposes of improving the position fixing precision of the neutron sensor and improving the measurement precision of the neutron sensor are achieved; the positioning section in the scheme can be used as an electronic shielding layer outside the neutron sensor, so that the influence of the adjacent neutron sensor on the work of each neutron sensor is avoided, and the measurement precision of the neutron sensor is further improved. The structural design that this scheme provided is convenient for arrange the needs according to concrete neutron sensor, sets up the location section of position matching on neutron sensor location section, so this scheme still has simple structure, the easy characteristics of manufacturing.
The further technical scheme is as follows:
as an integrated structure to avoid forming if add the structural component on the base plate as neutron sensor registration arm the locating section, the weak region of existence connection, the weak region of mechanical properties, the weak region of anticorrosive and irradiation that leads to, as a convenient technical scheme of processing simultaneously, set up to: the neutron sensor positioning tube is formed by cutting a pipeline: the positioning section is a complete section in the axial direction of the pipeline, and the wire leading cavity is a groove-shaped cavity formed after the pipeline is partially cut off. In this scheme, the pipeline adopt satisfy a return circuit operation requirement nonrust steel pipe can. During specific manufacturing, the partial pipe wall of the partial pipe section is cut off by cutting and the like to obtain the lead cavity, and the positioning pipe is a partial complete pipe section of the pipeline.
In order to make neutron sensor registration arm when the installation, its whole position relative to the mounting point is adjustable, sets up to: the neutron sensor positioning tube fixing device is characterized by further comprising a position regulator used for achieving the fixing of the neutron sensor positioning tube, one end of the position regulator is used for being connected with the neutron sensor positioning tube, and the other end of the position regulator is provided with a pore channel with an internal thread section. In this embodiment, the hole is used as a connecting hole on the position adjuster: the adjustment purpose can be achieved by connecting the pore channel with the screw rod through threads and adjusting the matching length of the thread pair.
In order to make the pore canal can be used as a threading hole to realize the internal wiring of the detector assembly and reduce the pressure boundary opening of a pressure container, the arrangement is as follows: the hole passes through two ends of the position regulator.
As a temperature sensor on the detector assembly can be installed by utilizing the lead wire constraint tube, and simultaneously, the lead wires of a plurality of neutron sensors can be led in and out of the position regulator through the lead wire constraint tube, the technical scheme is as follows: the neutron sensor positioning tube is characterized by also comprising a lead wire restraint tube serving as an intermediate connecting piece between the position regulator and the neutron sensor positioning tube, wherein one end of the lead wire restraint tube is connected with the position regulator, the inner space of the lead wire restraint tube is communicated with the inner space of the position regulator, and the other end of the lead wire restraint tube is connected with the neutron sensor positioning tube; and a strip-shaped through hole penetrating through the side wall of the lead wire restraint tube is also arranged on the side wall of the lead wire restraint tube.
As a technical scheme who does benefit to reduce through hole trompil to the weakening of lead wire restraint tube intensity, set up to: the longitudinal direction of the through hole is along the longitudinal direction of the lead wire restraint tube.
In order to provide position indication for the installation of the temperature sensor and simultaneously provide a reliable position constraint for the temperature sensor, the technical scheme is as follows: and a groove for mounting a temperature sensor is also arranged on the outer wall of the lead wire restraint tube. When the temperature sensor is used specifically, the temperature sensor is embedded into the groove, and meanwhile, the temperature sensor is connected with the outer wall of the lead wire restraint tube in a welding mode. The wiring of the temperature sensor is also led out from the through hole and led out of the lead wire constraint tube.
In order to realize the reliable connection of lead wire restraint pipe and neutron sensor registration arm, set up to: the other end of the lead wire restraint tube is a tapered reducing section, and the diameter minimum position of the reducing section is located at the end part of the lead wire restraint tube. When the integrated design scheme is specifically used, for example, according to the integrated design scheme of the neutron sensor positioning tube, the diameter-reducing section can be inserted into a tube hole on the neutron sensor positioning tube or embedded into a tube hole groove body on the neutron sensor positioning tube to form an insertion or lap joint mode, and then the final connection is completed by utilizing welding connection.
In order to realize reliable connection between reactor core detector subassembly components, set up as: the position regulator is connected with the lead wire restraint tube in a welding mode after being spliced, and the lead wire restraint tube is connected with the neutron sensor positioning tube in a welding mode after being spliced or lapped.
For optimizing the restraint effect and the electronic shielding effect of the positioning section on the neutron sensor, the method is set as follows: the inner diameter of the positioning section is equal to the outer diameter of the neutron sensor.
More completely, aiming at the characteristic that the number of the lead wires on the reactor core detector assembly is large, the reactor core detector assembly preferably further comprises a metal cylinder for restraining the lead wires in a bundle, and a channel on the metal cylinder is used as a threading channel of the lead wires.
The invention has the following beneficial effects:
be different from traditional neutron sensor locate mode, in this scheme through-hole on the location section is as the neutron sensor fixed orifices, and sets up to through-hole length and be greater than neutron sensor length, and like this, the one end of definition neutron sensor is the wiring end, and the other end is the front end, through the lead wire chamber that sets up in this scheme, with the front end of neutron sensor as leading in end, can accomplish the neutron sensor and be in grafting in the through-hole, and concrete grafting position makes the both ends of neutron sensor all be located in the through-hole, then, adopt again to set up the solder joint between neutron sensor and neutron sensor registration arm, can accomplish the reliable fixed of neutron sensor. Thus, the positioning section in the scheme can provide side constraint for the neutron sensor, so that the neutron sensor is prevented from being influenced by vibration working conditions, displacement hidden danger exists in the neutron sensor, and the purposes of improving the position fixing precision of the neutron sensor and improving the measurement precision of the neutron sensor are achieved; the positioning section in the scheme can be used as an electronic shielding layer outside the neutron sensor, so that the influence of the adjacent neutron sensor on the work of each neutron sensor is avoided, and the measurement precision of the neutron sensor is further improved. The structural design that this scheme provided is convenient for arrange the needs according to concrete neutron sensor, sets up the location section of position matching on neutron sensor location section, so this scheme still has simple structure, the easy characteristics of manufacturing.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a positioning device for improving the positioning accuracy of a core probe assembly sensor according to the present invention, wherein the schematic structural diagram is a schematic structural diagram of a position regulator;
FIG. 2 is a schematic structural view of an embodiment of the positioning apparatus for improving the positioning accuracy of the core probe assembly sensor according to the present invention, wherein the schematic structural view is a lead restraining tube;
FIG. 3 is a schematic structural diagram of an embodiment of the positioning device for improving the positioning accuracy of the core probe assembly sensor according to the present invention, wherein the schematic structural diagram is a schematic structural diagram of a dotted circle portion in FIG. 2;
FIG. 4 is a schematic structural diagram of an embodiment of the positioning device for improving the positioning accuracy of the core probe assembly sensor according to the invention, wherein the schematic structural diagram is a cross-sectional view taken along the direction B-B in FIG. 2;
fig. 5 is a schematic structural diagram of an embodiment of the positioning device for improving the positioning accuracy of the core detector assembly sensor according to the present invention, and the schematic structural diagram is a schematic structural diagram of a neutron sensor positioning tube.
The labels in the figure are respectively: 1. the device comprises a position regulator 1-1, an internal thread section 1-2, a first connecting section 2, a lead wire restraint tube 2-1, a through hole 2-2, a groove 2-3, a third connecting end 2-4, a second connecting end 3, a neutron sensor positioning tube 3-1, a fourth connecting end 3-2, a lead wire cavity 3-3 and a positioning section.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples:
example 1:
as shown in fig. 1 to 5, the positioning device capable of improving the positioning accuracy of the reactor core detector assembly sensor comprises a neutron sensor positioning tube 3, wherein a plurality of positioning sections 3-3 are arranged on the neutron sensor positioning tube 3 at intervals along the length direction of the neutron sensor positioning tube 3, a lead cavity 3-2 for wiring is arranged between every two adjacent positioning sections 3-3, and the positioning sections 3-3 are tubular structures provided with through holes, and the length of each through hole is greater than that of the neutron sensor.
The neutron sensor positioning tube 3 provided by the scheme is used for restraining the neutron sensor, namely, the fixation of the neutron sensor on the neutron sensor positioning tube 3 is realized. In the specific structural design, the positioning section 3-3 arranged on the neutron sensor positioning tube 3 is used as a specific fixed position of the neutron sensor, and during specific use, a mode of fixing a single neutron sensor by using a single positioning section 3-3 is preferably adopted, so that for neutron measurement at different positions, the scheme is adopted, and only the positioning section 3-3 is required to be arranged at the corresponding position of the neutron sensor positioning tube 3.
Different from the traditional neutron sensor positioning mode, the through hole in the positioning section 3-3 is used as a neutron sensor fixing hole and is set to be longer than the neutron sensor, so that one end of the neutron sensor is defined as a wiring end, the other end of the neutron sensor is defined as a front end, the front end of the neutron sensor is used as a leading-in end through a lead cavity 3-2 arranged in the scheme, the neutron sensor can be plugged in the through hole, the two ends of the neutron sensor are all located in the through hole due to the specific plugging position, then welding spots are arranged between the neutron sensor and the neutron sensor positioning tube 3, and the neutron sensor can be reliably fixed. In this way, the positioning section 3-3 in the scheme can provide side restraint for the neutron sensor, so that the neutron sensor is prevented from having displacement hidden danger due to the fact that the neutron sensor is influenced by vibration working conditions, and the purposes of improving the position fixing precision of the neutron sensor and improving the measurement precision of the neutron sensor are achieved; the positioning section 3-3 in the scheme can be used as an electronic shielding layer outside the neutron sensor, so that the influence of the work of each neutron sensor by the adjacent neutron sensor is avoided, and the measurement precision of the neutron sensor is further improved. The structural design provided by the scheme is convenient for arranging the positioning section 3-3 with matched positions on the positioning section 3-3 of the neutron sensor according to the arrangement requirement of the specific neutron sensor, so the scheme also has the characteristics of simple structure and easiness in processing and manufacturing.
Example 2:
the embodiment is further limited on the basis of embodiment 1, and as an integrated structure, the positioning section 3-3 is prevented from being formed by adding structural components on a substrate serving as the neutron sensor positioning tube 3, so that a connection weak area, a mechanical property weak area and a corrosion-resistant and irradiation weak area exist, and meanwhile, as a technical scheme with convenient processing, the positioning structure is set as follows: the neutron sensor positioning tube 3 is formed by cutting a pipeline: the positioning section 3-3 is a complete section in the axial direction of the pipeline, and the lead wire cavity 3-2 is a groove-shaped cavity formed after a part of the pipeline is cut off. In this scheme, the pipeline adopt satisfy a return circuit operation requirement nonrust steel pipe can. During specific manufacturing, the partial pipe wall of the partial pipe section is cut off by cutting and the like to obtain the lead wire cavity 3-2, and the positioning pipe is a partial complete pipe section of the pipeline.
Example 3:
the embodiment is further limited on the basis of embodiment 1, in order to enable the overall position of the neutron sensor positioning tube 3 relative to the mounting point to be adjustable when the neutron sensor positioning tube is mounted, the arrangement is as follows: the device is characterized by further comprising a position regulator 1 used for achieving installation and fixation of the neutron sensor positioning tube 3, wherein one end of the position regulator 1 is used for being connected with the neutron sensor positioning tube 3, and the other end of the position regulator 1 is provided with a pore channel with an internal thread section 1-1. In this embodiment, the hole is used as a connection hole on the position adjuster 1: the adjustment purpose can be achieved by connecting the pore channel with the screw rod through threads and adjusting the matching length of the thread pair.
In order to make the pore canal can be used as a threading hole to realize the internal wiring of the detector assembly and reduce the pressure boundary opening of a pressure container, the arrangement is as follows: the hole passes through both ends of the position regulator 1.
As a temperature sensor on the detector assembly can be installed by utilizing the lead wire restraint tube 2, and simultaneously, the lead wires of a plurality of neutron sensors can be led in and out of the position regulator 1 through the lead wire restraint tube 2, the technical scheme is as follows: the neutron sensor positioning tube comprises a position regulator 1, a neutron sensor positioning tube 3 and a lead wire restraint tube 2 serving as an intermediate connecting piece between the position regulator 1 and the neutron sensor positioning tube 3, wherein one end of the lead wire restraint tube 2 is connected with the position regulator 1, the inner space of the lead wire restraint tube 2 is communicated with the inner space of the position regulator 1, and the other end of the lead wire restraint tube 2 is connected with the neutron sensor positioning tube 3; the side wall of the lead wire restraint tube 2 is also provided with a strip-shaped through hole 2-1 penetrating through the side wall of the lead wire restraint tube 2.
As a technical scheme which is beneficial to reducing the weakening of the strength of the through hole 2-1 opening to the lead wire restraint tube 2, the structure is as follows: the longitudinal direction of the through hole 2-1 is along the longitudinal direction of the lead wire restraining tube 2.
In order to provide position indication for the installation of the temperature sensor and simultaneously provide a reliable position constraint for the temperature sensor, the technical scheme is as follows: the outer wall of the lead wire restraint tube 2 is also provided with a groove 2-2 for mounting a temperature sensor. When the temperature sensor is used specifically, the temperature sensor is embedded into the groove 2-2, and meanwhile, the temperature sensor is connected with the outer wall of the lead wire restraint tube 2 in a welding mode. The wiring of the temperature sensor is also led out from the through hole 2-1 and led out of the lead wire restraint tube 2.
In order to realize the reliable connection of lead wire restraint pipe 2 and neutron sensor registration arm 3, set up to: the other end of the lead wire restraint tube 2 is a tapered reducing section, and the diameter minimum position of the reducing section is located at the end part of the lead wire restraint tube 2. In specific application, for example, according to the above-mentioned integrated design scheme of the neutron sensor positioning tube 3, the diameter-reduced section can be inserted into the tube hole on the neutron sensor positioning tube 3 or inserted into the tube hole groove body on the neutron sensor positioning tube 3 to form an insertion or overlapping mode, and then welded to complete final connection.
In order to realize reliable connection between reactor core detector subassembly components, set up as: the position regulator 1 is connected with the lead wire restraint tube 2 in a welded mode after being spliced, and the lead wire restraint tube 2 is connected with the neutron sensor positioning tube 3 in a welded mode after being spliced or lapped.
Example 4:
the embodiment is further limited on the basis of embodiment 1, and in order to optimize the constraint effect and the electronic shielding effect of the positioning section 3-3 on the neutron sensor, the following settings are set: the inner diameter of the positioning section 3-3 is equal to the outer diameter of the neutron sensor.
The foregoing is a more detailed description of the present invention in connection with specific preferred embodiments thereof, and it is not intended that the specific embodiments of the present invention be limited to these descriptions. For those skilled in the art to which the invention pertains, other embodiments that do not depart from the gist of the invention are intended to be within the scope of the invention.
Claims (10)
1. Can improve reactor core detector subassembly sensor positioning accuracy's positioner, including neutron sensor registration arm (3), its characterized in that, be provided with a plurality of location sections (3-3) of arranging along neutron sensor registration arm (3) length direction interval on neutron sensor registration arm (3), be provided with between adjacent location section (3-3) and be used for the lead wire chamber (3-2) of wiring, location section (3-3) are provided with the through-hole on it, and through-hole length is greater than the tubular structure of neutron sensor length.
2. The positioning device capable of improving the positioning accuracy of the core detector assembly sensor according to claim 1, wherein the neutron sensor positioning tube (3) is cut from a pipeline: the positioning section (3-3) is a complete section in the axial direction of the pipeline, and the lead wire cavity (3-2) is a groove-shaped cavity formed after the pipeline is partially cut off.
3. The positioning device capable of improving the positioning accuracy of the core detector assembly sensor according to claim 1, further comprising a position regulator (1) for realizing the installation and fixation of the neutron sensor positioning tube (3), wherein one end of the position regulator (1) is used for being connected with the neutron sensor positioning tube (3), and the other end of the position regulator is provided with a hole channel with an internal thread section (1-1).
4. The positioning device capable of improving the positioning accuracy of the core detector assembly sensor according to claim 3, wherein the duct penetrates through two ends of the position regulator (1).
5. The positioning device capable of improving the positioning accuracy of the sensor of the reactor core detector assembly as claimed in claim 4, further comprising a lead restraining tube (2) as an intermediate connector between the position regulator (1) and the neutron sensor positioning tube (3), wherein one end of the lead restraining tube (2) is connected with the position regulator (1), the tube space of the lead restraining tube (2) is communicated with the inner space of the position regulator (1), and the other end of the lead restraining tube (2) is connected with the neutron sensor positioning tube (3); the side wall of the lead wire restraint tube (2) is also provided with a strip-shaped through hole (2-1) penetrating through the side wall of the lead wire restraint tube (2).
6. The positioning device capable of improving the positioning accuracy of the core probe assembly sensor according to claim 5, wherein the length direction of the through hole (2-1) is along the length direction of the lead wire restraining tube (2).
7. The positioning device capable of improving the positioning accuracy of the core detector assembly sensor according to claim 4, wherein the outer wall of the lead wire restraint tube (2) is further provided with a groove (2-2) for installing a temperature sensor.
8. The positioning device capable of improving the positioning accuracy of the core detector assembly sensor as claimed in claim 4, wherein the other end of the lead restraining tube (2) is a tapered reducing section, and the diameter minimum position of the reducing section is located at the end part of the lead restraining tube (2).
9. The positioning device capable of improving the positioning accuracy of the reactor core detector assembly sensor as claimed in claim 4, wherein the position regulator (1) is connected with the lead constraint tube (2) in a welding mode after being inserted, and the lead constraint tube (2) is connected with the neutron sensor positioning tube (3) in an insertion or overlapping mode in a welding mode.
10. The positioning device for improving the positioning accuracy of the core detector assembly sensor according to any one of claims 1 to 9, wherein the inner diameter of the positioning section (3-3) is equal to the outer diameter of the neutron sensor.
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