Heavy Water Reactor Nuclear Power Plant Steam Generator Lateral Support Condition Monitoring System

Abstract

The present invention relates to the technical field of steam generator status monitoring, and specifically discloses a steam generator transverse support status monitoring system for a heavy water reactor nuclear power plant. In the system, a data module and a signal module are integrally arranged inside a radiation shielding box, and are connected to a plurality of measuring devices arranged on the steam generator transverse support through cables; the measuring devices can measure the displacement and temperature of the steam generator transverse support, and transmit them to the data module and the signal module, and process, analyze and store the collected displacement and temperature data of the steam generator transverse support. The system can adapt to the special environment of high radiation dose and high temperature at the steam generator transverse support, and arranges radiation-sensitive electronic components such as data systems and signal modules in the shielding body. At the same time, the measuring equipment is made of metals such as stainless steel and insulating materials with radiation resistance and high temperature resistance, so as to realize accurate and reliable monitoring of the transverse support status of the steam generator of the heavy water reactor nuclear power plant.

Description

Technical Field

[0001] The invention belongs to the technical field of steam generator state monitoring, and in particular relates to a lateral support state monitoring system for a steam generator of a heavy water reactor nuclear power plant. Background Art

[0002] In a heavy water reactor nuclear power plant, the lateral support of the steam generator is mainly composed of pillars and two dampers. Each steam generator has two lateral supports, which are mainly used for earthquake resistance and provide a certain amount of expansion and contraction in the vertical and horizontal directions for the steam generator during the heating and cooling of the unit.

[0003] The condition monitoring device is used to collect data and signals from running equipment, so as to analyze and determine the equipment degradation trend, fault location, cause and predict changes and developments, propose preventive measures, prevent and control sudden failures, and provide a reliable basis for equipment condition maintenance.

[0004] In existing heavy water reactor nuclear power plants, there is no dedicated device for monitoring the status of the steam generator's lateral supports during unit operation. As a result, the status of the steam generator's lateral supports cannot be monitored, and operating personnel cannot evaluate the operating status of the lateral supports during unit operation, and lack a basis for judging the operating status of the steam generator. Summary of the invention

[0005] The purpose of the present invention is to provide a heavy water reactor nuclear power plant steam generator lateral support state monitoring system to solve the problem that the prior art cannot monitor the steam generator lateral support state.

[0006] The technical solution of the present invention is as follows: a state monitoring system for a transverse support of a steam generator in a heavy water reactor nuclear power plant, the system comprising a radiation shielding box, a data module, a signal module and a plurality of measuring devices, wherein the data module and the signal module are integrally arranged inside the radiation shielding box, and are connected to a plurality of measuring devices arranged on the transverse support of the steam generator via cables; the measuring device can measure the displacement and temperature of the transverse support of the steam generator, and transmit them to the data module and the signal module, and process, analyze and store the collected displacement and temperature data of the transverse support of the steam generator.

[0007] The measuring device at least comprises a temperature sensor and / or a displacement sensor, wherein the temperature sensor and the displacement sensor are arranged on the lateral support through a sensor tooling.

[0008] The data module includes a data processing unit, a data storage unit and a data evaluation unit, wherein the data processing unit can digitize and record the temperature and displacement data collected by the measuring equipment, and obtain the lateral support movement state of the steam generator by analyzing the change trend and characteristics of the measuring data; the data storage unit can store at a certain time interval, and at the same time store the operating status parameters of each measuring device and data module; the data evaluation unit can access database files, text files or table files, and evaluate the measured values.

[0009] The signal module can condition the signal processed by the data module and standardize the measurement values ​​collected by the measuring device.

[0010] The temperature sensor is a platinum resistance Pt100 temperature sensor, which uses a three-wire system to transmit resistance signals; the temperature sensor is located in the shielding layer, and the signal cable connected to it is connected to the equipment inside the radiation shielding box through the connector socket and connector plug outside the shielding layer to achieve fast and reliable docking.

[0011] The outer layer of the signal cable is made of radiation-resistant and high-temperature-resistant materials to make the insulator; the outer layer of the signal cable is made of polyetheretherketone materials to make the insulator.

[0012] The displacement sensor comprises a displacement sensor probe and a displacement sensor body, wherein the displacement sensor body is fixed on a first lateral support through two sensor fixtures, one end of the displacement sensor probe extends into the displacement sensor body, and the other end is arranged on a second lateral support through the sensor fixture, and the axis of the displacement sensor is parallel to the axis of the lateral support; the first lateral support and the second lateral support are connected through a lateral support telescopic joint, and the displacement changes of the two lateral supports are measured by utilizing the position changes of the displacement sensor body and the displacement sensor probe.

[0013] The sensor fixture is fixed on the transverse support through a clamp, and the sensor fixture is welded on the clamp. The clamp has a width of 30 to 40 mm and a thickness of 1 mm and is made of stainless steel.

[0014] The radiation shielding box comprises a radiation shielding box shell made of multiple layers of metal shielding material, and a door that can be opened or closed is provided on the radiation shielding box shell, and the door is fixed by a latch provided on the door; a cable threading hole is also provided on the radiation shielding box shell, so that the internal equipment of the radiation shielding box is connected to the external measuring equipment using a connector and a signal cable; a plurality of ventilation and heat dissipation holes are also provided on the radiation shielding box shell for heat dissipation of the internal equipment of the radiation shielding box; the shielding box is made of multiple layers of metal shielding and moderating materials, can shield gamma rays and neutron radiation in the containment, and is placed at a position in the containment where the radiation dose is low and the ambient temperature is low.

[0015] The displacement sensor is an LVDT displacement sensor, and its housing is made of stainless steel.

[0016] The remarkable effect of the present invention is that the state monitoring system of the transverse support of the steam generator of the heavy water reactor nuclear power plant described in the present invention can adapt to the special environment of high radiation dose and high temperature at the transverse support of the steam generator, and arranges radiation-sensitive electronic components such as data systems and signal modules in the shielding body. At the same time, the measuring equipment is made of metals such as stainless steel and insulating materials with radiation resistance and high temperature resistance, so as to realize accurate and reliable state monitoring of the transverse support of the steam generator of the heavy water reactor nuclear power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the connection of a state monitoring system for a lateral support of a steam generator of a heavy water reactor nuclear power plant according to the present invention;

[0018] Figure 2 A schematic diagram of the connection of a temperature sensor measuring device in a state monitoring system for a lateral support of a steam generator in a heavy water reactor nuclear power plant according to the present invention;

[0019] Figure 3 A schematic diagram of the connection of a displacement sensor measuring device in a state monitoring system for a lateral support of a steam generator in a heavy water reactor nuclear power plant according to the present invention;

[0020] Figure 4 A schematic diagram of a sensor clamp and a tooling for measuring equipment in a state monitoring system for a lateral support of a steam generator in a heavy water reactor nuclear power plant according to the present invention;

[0021] Figure 5 It is a structural schematic diagram of a radiation shielding box in a state monitoring system for a lateral support of a steam generator in a heavy water reactor nuclear power plant according to the present invention;

[0022] In the figure: 1. radiation shielding box; 2. data module; 3. signal module; 4. connector; 5. measuring equipment; 6. cable; 7. temperature sensor; 8. signal cable; 9. shielding layer; 10. connector socket; 11. connector plug; 12. lateral support; 13. clamp; 14. sensor tooling; 15. displacement sensor probe; 16. lateral support expansion joint; 17. displacement sensor body; 18. radiation shielding box shell; 19. cable threading hole; 20. ventilation and heat dissipation hole; 21. door; 22. latch. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1 As shown, a state monitoring system for the lateral support of a steam generator in a heavy water reactor nuclear power plant is provided, the system comprising a radiation shielding box 1, a data module 2, a signal module 3 and a plurality of measuring devices 5, wherein the data module 2 and the signal module 3 are integrally installed inside the radiation shielding box 1, and are connected to the plurality of measuring devices 5 located outside the radiation shielding box 1 through a cable 6; the data module 2 comprises a data processing unit, a data storage unit and a data evaluation unit, wherein the data processing unit can digitize and record the temperature and displacement data collected by the measuring device, and obtain the movement state of the lateral support of the steam generator by analyzing the variation trend and characteristics of the measuring data; the data storage unit can store data at a certain time interval, and at the same time, store the data of each measuring device, the data module 2 and the signal module 3; The operating status parameters of block 2 are stored, and the measurement data are stored in three formats: database file, text file and data table file, and multiple redundant storage is used to prevent file loss; the data evaluation unit can access the database file, text file or table file, and evaluate the measurement value; in addition, the data evaluation unit can display the measurement value in real time and configure the entire measurement system. At the same time, it can display the current and historical fault information in the system, as well as the measurement value that deviates from the normal range, and evaluate the rationality of the measurement value, determine the measurement value change curve and depict it; the signal module 3 is connected to the data module 2, and the signal module 3 is used to condition the signal processed by the data module 2, and the measurement value collected by the measuring device 5 is standardized;

[0025] like Figures 2 to 4As shown, at least one of the several measuring devices 5 comprises a temperature sensor 7 and / or a displacement sensor, wherein the temperature sensor 7 is a platinum resistance Pt100 temperature sensor, which transmits resistance signals in a three-wire system, wherein the temperature sensor 7 located in the shielding layer 9 is matched and connected with a connector plug 11 on the outer end of the shielding layer 9 of the signal cable 8 extending out of the radiation shielding box 1 through a connector socket 10 on the outer end of the shielding layer 9 of the signal cable 8, and the connector socket 10 and the connector plug 11 are aviation plug-in plugs, which can be quickly, conveniently and reliably connected, and can be dustproof and waterproof; the outer layer of the signal cable is made of an insulator made of radiation-resistant and high-temperature-resistant material, for example, an insulator made of polyetheretherketone (PEEK);

[0026] The temperature sensor 7 and the displacement sensor are fixed to the clamp by means of threads and tension pins, and the clamp is fixed to the transverse support 12 by means of tension pins, wherein the displacement sensor specifically comprises a displacement sensor probe 15 and a displacement sensor body 17, and the displacement sensor body 17 is fixedly mounted on the first transverse support 12 by means of two sensor fixtures 14, one end of the displacement sensor probe 15 extends into the interior of the displacement sensor body 17, and the other end is mounted on the second transverse support 12 by means of the sensor fixture 14, and the axis of the displacement sensor is parallel to the axis of the transverse support 12; the sensor fixture 14 is fixed on the annular clamp 13 by welding, and the clamp is fixed on the cylindrical transverse support 12 by a tension pin; any two transverse supports 12 are connected by a transverse support expansion joint 16, and the displacement changes of the two transverse supports 12 are measured by using the displacement sensor body 17 and the displacement sensor probe 15; the clamp (13) used to fix the sensor tooling 14 has a width of 30-40mm and a thickness of 1mm, and is made of stainless steel; the displacement sensor can specifically be an LVDT displacement sensor, which has very good measurement accuracy and has a stainless steel metal shell.

[0027] The radiation shielding box 1 includes a radiation shielding box shell 18 made of a multi-layer metal shielding material, and a door 21 that can be opened or closed is provided on the radiation shielding box shell 18, and the door 21 is fixed by a latch 22 provided on the door 21; a cable threading hole 19 is also provided on the radiation shielding box shell 18, so that the internal equipment of the radiation shielding box 1 is connected to the external measuring equipment 5 using a connector 4 and a signal cable 8; a plurality of ventilation and heat dissipation holes 20 are also provided on the radiation shielding box shell 18 for heat dissipation of the internal equipment of the radiation shielding box 1; the shielding box is made of multi-layer metal shielding and moderating materials, such as cadmium, lead, stainless steel, etc., which can shield the gamma rays and neutron radiation in the containment, and is placed at a position in the containment where the radiation dose is low and the ambient temperature is low, and non-straight ventilation and heat dissipation holes and cable threading holes are provided to ensure that the radiation dose is reduced while ensuring ventilation and heat dissipation, so as to facilitate the normal long-term operation of the data system and the signal module.

Claims

1. A heavy water reactor nuclear power plant steam generator lateral support status monitoring system, characterized in that: The system comprises a radiation shielding box (1), a data module (2), a signal module (3) and a plurality of measuring devices (5), wherein the data module (2) and the signal module (3) are integrally arranged inside the radiation shielding box (1) and connected to a plurality of measuring devices (5) arranged on a transverse support of a steam generator via a cable (6); the measuring device (5) can measure the displacement and temperature of the transverse support of the steam generator, and transmit the measured displacement and temperature data to the data module (2) and the signal module (3), and process, analyze and store the collected displacement and temperature data of the transverse support of the steam generator; the measuring device (5) at least comprises a temperature measuring device; The invention relates to a steam generator comprising a plurality of transverse supports (12) and a plurality of transverse supports (12). The plurality of transverse supports (12) are provided with a plurality of temperature sensors (7) and a displacement sensor, wherein the temperature sensor (7) and the displacement sensor are arranged on the transverse support (12) via a sensor fixture (14); the data module (2) comprises a data processing unit, a data storage unit and a data evaluation unit, wherein the data processing unit can digitize and record the temperature and displacement data collected by the measuring device, and obtain the movement state of the transverse support of the steam generator by analyzing the change trend and characteristics of the measuring data; the data storage unit can store data at a certain time interval and store the operating state parameters of each measuring device and the data module at the same time; the data evaluation unit can access the data of the steam generator and the transverse support; The temperature sensor (7) is a platinum resistance Pt100 temperature sensor, which transmits resistance signals in a three-wire system. The temperature sensor (7) is located in the shielding layer (9), and the signal cable (8) connected to the temperature sensor (7) is connected to the device inside the radiation shielding box through the connector socket (10) and the connector plug (11) outside the shielding layer (9), so as to achieve fast and reliable docking. The displacement sensor includes a displacement sensor probe (15) and a displacement sensor body (17), wherein the displacement sensor body (17) is connected to the radiation shielding box through two sensor working The sensor tooling (14) is fixed on the first transverse support, one end of the displacement sensor probe (15) extends into the displacement sensor body (17), and the other end is arranged on the second transverse support through the sensor tooling (14), and the axis of the displacement sensor is parallel to the axis of the transverse support (12); the first transverse support and the second transverse support are connected through a transverse support telescopic joint (16), and the displacement change of the two transverse supports (12) is measured by using the position change of the displacement sensor body (17) and the displacement sensor probe (15); the sensor tooling (14) is fixed on the transverse support (12) through a clamp.

2. A heavy water reactor nuclear power plant steam generator lateral support status monitoring system according to claim 1, characterized in that: The signal module (3) can condition the signal processed by the data module (2) and standardize the measurement values ​​collected by the measuring device (5).

3. A heavy water reactor nuclear power plant steam generator lateral support status monitoring system according to claim 1, characterized in that: The outer layer of the signal cable (8) is made of an insulator made of a radiation-resistant and high-temperature-resistant material; the outer layer of the signal cable (8) is made of an insulator made of a polyetheretherketone material.

4. A heavy water reactor nuclear power plant steam generator lateral support status monitoring system according to claim 1, characterized in that: The sensor tooling (14) is welded to the clamp (13); the clamp has a width of 30-40 mm and a thickness of 1 mm and is made of stainless steel.

5. A heavy water reactor nuclear power plant steam generator lateral support status monitoring system according to claim 1, characterized in that: The radiation shielding box (1) comprises a radiation shielding box shell (18) made of a multi-layer metal shielding material, and a door (21) that can be opened or closed is provided on the radiation shielding box shell (18), and the door (21) is fixed by a door latch (22) provided on the door (21); a cable threading hole (19) is also provided on the radiation shielding box shell (18), so that the internal equipment of the radiation shielding box (1) can be connected to the external measuring equipment (5) using a connector (4) and a signal cable (8); a plurality of ventilation and heat dissipation holes (20) are also provided on the radiation shielding box shell (18) for heat dissipation of the internal equipment of the radiation shielding box (1); the shielding box is made of a multi-layer metal shielding and moderating material, can shield the gamma rays and neutron radiation in the containment, and is placed at a position in the containment where the radiation dose is low and the ambient temperature is low.

6. A heavy water reactor nuclear power plant steam generator lateral support status monitoring system according to claim 1, characterized in that: The displacement sensor is an LVDT displacement sensor, and its housing is made of stainless steel.

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