CN107144872A - A kind of pressurized-water reactor nuclear power plant reactor core neutron measurement system-specific test device and method - Google Patents

Abstract

The present invention relates to a kind of pressurized-water reactor nuclear power plant reactor core neutron measurement system-specific test device and method, Special testing device includes：Wireless module, control plate and multiple test plates are equipped with test box, host computer, test box, test plate is connected with corresponding tested device, wherein, host computer, for obtaining the test control signal corresponding to the test device that tester is inputted, and sends to test box；And the test response signal transmitted by test box is recorded and analyzed, and export analysis result；Wireless module, for receiving the test control signal from host computer, and outputs this to control plate, and the test response signal for controlling plate output is sent to host computer；Plate is controlled, for the test control signal received to be distributed to corresponding test plate, and the test response signal that collecting test plate is returned.Implement technical scheme, the Special testing device has digitized on-line checking and historical data analysis function.

Description

A special test device and method for the core neutron measurement system of a pressurized water reactor nuclear power plant

technical field

The invention relates to the field of nuclear power, in particular to a special test device and method for a core neutron measurement system of a pressurized water reactor nuclear power plant.

Background technique

At present, the base power plants can only rely on the foreign AREVA test box for the maintenance of the neutron equipment of the core neutron measurement system (RIC) of the pressurized water reactor nuclear power plant. The test box is expensive to purchase and has incomplete functions. The device is composed of only a few relatively simple tests, and can only be measured manually with conventional tools such as multimeters and stopwatches. It does not have the ability to automatically collect and analyze data, store and recall historical data.

Contents of the invention

The technical problem to be solved by the present invention is to provide a special test device and method for the core neutron measurement system of a pressurized water reactor nuclear power plant in view of the above-mentioned defects of the prior art.

The technical solution adopted by the present invention to solve the technical problem is: to construct a special test device for the core neutron measurement system of the pressurized water reactor nuclear power plant, which is used to test the selector, electric valve and drive unit in the core neutron measurement system Test, it is characterized in that, described special test device comprises: test case, upper computer, wherein, wireless module, control panel and a plurality of test panels are housed in described test box, and described test panel and corresponding waiting The test device is connected where,

The host computer is used to obtain the test control signal corresponding to the test device input by the tester, and send it to the test box; and record and analyze the test response signal sent by the test box, and output the analysis result;

The wireless module is used to receive the test control signal from the host computer, output it to the control board, and send the test response signal output by the control board to the host computer;

The control board is used for distributing the received test control signals to corresponding test boards, and collecting test response signals returned by the test boards.

Preferably, the host computer is also used to judge whether the test response signal exceeds a preset corresponding standard value, and if so, output an alarm signal.

Preferably, the host computer is also used to output the analysis results in the form of graphs, curves, charts or warning lights.

Preferably, the host computer is configured to output the analysis results by printing.

Preferably, the host computer is also used to store the test response signal and the analysis result.

Preferably, the host computer is also used to establish a folder corresponding to each overhaul, and establish a file corresponding to each test device under the folder, and send the test response signal of the test device and the analysis results are stored in corresponding files.

Preferably, the host computer is further configured to receive an online drawing viewing request input by a user, and call out and display an electronic file of a corresponding drawing from pre-stored drawings according to the drawing online viewing request.

Preferably, the test device is a selector, and,

The test control signal includes a path selection control command and a state control signal of the selector;

The test response signal includes:

A time signal between sending out the path selection control command and receiving the feedback signal of the microswitch at the specific position of the corresponding path;

The working current signal of the motor and clutch in the selector and the start and stop current signals;

Microswitches at the entrance of the selector and status signals of microswitches at specific positions in the channel;

The closed contact resistance value of the microswitch at the inlet of the selector and the microswitch at the specific position of the channel.

Preferably, the test device is an electric valve, and,

The test control signal includes a state control command of the electric valve;

The test response signal includes:

Status signal of the microswitch in the open and closed position of the electric valve

The closed contact resistance value of the micro switch at the open and close position of the electric valve;

The time signal of the electric valve from opening to closing.

Preferably, the test device is a drive unit, and the drive unit includes a drive motor, a reel motor and a synchronous motor,

The test control signal includes: forward/backward, high speed/low speed control commands of the drive motor;

The test response signal includes:

Working current signal and starting current signal of drive motor, winding reel motor and synchronous motor;

Status signal of limit safety switch;

Closed contact resistance value of the limit safety switch.

The present invention also constructs a special test method for the core neutron measurement system of a pressurized water reactor nuclear power plant, which is used to test the selector, electric valve and drive unit in the core neutron measurement system, including:

The host computer obtains the test control signal corresponding to the test device input by the tester, and sends it to the test box, wherein the test box is equipped with a wireless module, a control board and a plurality of test boards;

The wireless module receives the test control signal from the host computer and outputs it to the control board;

The control board distributes the received test control signal to the corresponding test board, and collects the test response signal returned by the test board;

The wireless module sends the test response signal output by the control board to the host computer;

The upper computer records and analyzes the test response signal sent by the test box, and outputs the analysis result.

Preferably, it also includes:

The host computer judges whether the test response signal exceeds a preset corresponding standard value, and if so, outputs an alarm signal.

Implementation of the technical solution of the present invention, the RIC special test device is based on computer technology and digital acquisition and processing technology, it is suitable for all detection items of RIC neutron measurement equipment, has digital online detection and historical data analysis functions, and solves the problem of foreign AREVA The test box cannot meet the test item requirements of some equipment and the problem of data traceability.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is the logic structure diagram of embodiment one of the dedicated test device for the neutron measurement system of the pressurized water reactor nuclear power plant core of the present invention;

Fig. 2 is the schematic diagram of the software interface 1 of upper computer in Fig. 1;

Fig. 3 is the schematic diagram of the software interface two of upper computer in Fig. 1;

Fig. 4 is the schematic diagram of the software interface three of upper computer in Fig. 1;

Fig. 5 is the schematic diagram of the software interface four of upper computer among Fig. 1;

Fig. 6 is the schematic diagram of the software interface five of upper computer in Fig. 1;

Fig. 7 is the schematic diagram of the software interface six of upper computer in Fig. 1;

Fig. 8 is a schematic diagram of the software interface seven of the upper computer in Fig. 1;

Fig. 9 is a flow chart of Embodiment 1 of the special test method for the core neutron measurement system of the PWR nuclear power plant according to the present invention.

detailed description

The special test device for the core neutron measurement system of the present invention (hereinafter referred to as the special test device for RIC) is based on computer technology (including hardware development and software development), it is applicable to all detection items of RIC neutron measurement equipment, and has digital on-line detection and The historical data analysis function is used to solve the problem that foreign RIC special test equipment cannot meet the test item requirements and data traceability of some equipment, improve the quality and efficiency of RIC equipment maintenance, and can be extended to multi-base use. In addition, the RIC special test device structure has high integration, small size, light weight, easy to transport, carry, stable and reliable, and easy to maintain; the human interface is friendly and user-friendly. Moreover, the RIC special test device can perform the test operation of each device and the automatic analysis and data export of data through the software interface operation, and the test device can automatically generate the test result analysis report of each device.

Fig. 1 is the logic structure diagram of embodiment 1 of the special test device for the core neutron measurement system of the pressurized water reactor nuclear power plant of the present invention. Firstly, it is explained that the core neutron measurement system mainly includes a selector, an electric valve and a drive unit. The special test device for the core neutron measurement system (hereinafter referred to as the RIC special test device) is used to test the selector, electric valve and drive unit and other devices. And, this RIC special-purpose test device comprises upper computer 10 and test box 20, wherein, wireless module 21, control board 22 and a plurality of test boards 231, ..., 232 are housed in test box 20, and a plurality of test boards 231 , . . . , 232 are respectively connected to corresponding devices under test. The host computer 10 is used to obtain the test control signal corresponding to the test device input by the tester, and send it to the test box; record and analyze the test response signal sent by the test box, and output the analysis result. The wireless module 21 is used for receiving the test control signal from the host computer and outputting it to the control board, and sending the test response signal output by the control board to the host computer. The control board 22 is used for distributing the received test control signals to corresponding test boards, and collecting test response signals returned by the test boards.

Further, the host computer 10 is also used to judge whether the test response signal exceeds the corresponding preset standard value, and if so, output an alarm signal.

Further, the host computer 10 is also used to output the analysis results in the form of graphs, curves, charts or warning lights; and/or used to output the analysis results in the form of printing.

Further, the host computer 10 is also used for storing test response signals and analysis results.

Further, the host computer 10 is also used to establish a folder corresponding to each overhaul, and to establish a file corresponding to each test device under the folder, and store the test response signal and analysis result of the test device into the corresponding in the file.

Further, the upper computer 10 is also configured to receive an online drawing viewing request input by the user, and call and display the electronic file of the corresponding drawing from the pre-stored drawings according to the online drawing viewing request.

The following describes the specific functions of the RIC special test device:

Selector channel selection and positioning control: The RIC special test device can output control commands manually or automatically to select the normal measurement path, rescue path, calibration path or storage path, when the micro switch for position positioning of the corresponding path is detected After the feedback signal, the motor of the stop group selector completes the path selection function.

Measuring the working current of the internal motor and clutch of the selector: the measurement accuracy requires ±1mA, and the range is 0-500mA. The normal requirement of clutch current (48VDC DC) is I≤190mA; the normal requirement of clutch+motor current (48VDC DC) is I≤410mA.

Selector rotation time record: Calculate the time between sending out the path selection control command and receiving the feedback signal of the micro switch at the specific position of the corresponding path (accuracy ±100ms).

Micro switch feedback signal acquisition: detect and indicate the state of the micro switch at the entrance of the group selector and the micro switch at the specific position of the channel.

Micro switch contact resistance measurement: measure the closed contact resistance of the micro switch.

State control of the micro switch in the electric valve: manual or automatic mode can be selected to send the valve open or close operation command to the electric valve, and stop the motor rotation after receiving the feedback signal of the micro switch at the open or close position of the electric valve, and When the electric valve is in the open and closed position, there is a clear graphic mark.

Electric valve switch action time record: record the time during the rotation process of the electric valve from open to close and from close to open, and give a corresponding prompt when it times out (usually less than 5S).

Starting current and process current measurement of the driving motor: measure, record and display the starting current and process current of the driving motor and give the maximum current value to judge the working performance of the valve. When the current is over (usually less than 390mA), a corresponding prompt is given. (Range 0～800mA, measurement accuracy requires ±5mA.)

Driving motor operation control: It can be manually controlled to issue forward or backward, high-speed or low-speed control commands to the driving motor to control the operation of the driving motor.

Drive motor current test: It can manually control the start and stop drive unit 380VAC drive motor and test the high-speed, low-speed and brake coil working current of the 380VAC drive motor. The normal working current is about 3A, and the range can be set to 0-5A. ±0.1A.

State detection of coil magnetic switch: detect and record the state and working waveform of magnetic switch of coil.

48VDC reel motor current test: It can manually control the start and stop of the 48VDC reel motor and test the working current of the 48VDC reel motor. The normal working current is about 3-3.5A, and the range can be set to 0-5A. ±0.1A.

220VAC synchronous motor measurement: it can measure the output waveform of synchronous motor (synchronizer).

Safety switch status detection: detect and indicate the status and resistance of the safety switch.

The special test device for RIC in this embodiment is based on computer technology and digital acquisition and processing technology. It is suitable for all detection items of RIC neutron measurement equipment, and has digital online detection and historical data analysis functions, which solves the problem that foreign AREVA test boxes cannot meet Requirements for testing items and data traceability of some equipment. In addition, the wireless module is used to realize the data interaction between the acquisition chassis and the notebook computer. In order to control the two-speed AC motor, a high-power relay is designed as the control device of the two-speed AC motor control loop. In order to measure the working current of the two-speed AC motor and brake motor, an AC current transmitter is designed to measure the working current. In order to measure the working current of the DC stepping motor and the solenoid valve motor, a DC current transmitter is designed to measure the working current. In order to measure the position information of the synchronous position transmitter of the drive unit, the FB900C angular position transmitter is used to convert the angle of the rotating object into an angular displacement or a linear displacement output after being processed by the microprocessor. Provide 220VAC power supply for the synchro, and collect the feedback signal of the synchro. Can be used to receive feedback signals from synchronous motors. The signals of voltage, current, resistance, switching value and other signals of RIC equipment are collected by using series cards of NI Company of the United States.

In a specific embodiment, the RIC special test device is used in the maintenance work of the RIC system to perform relevant tests and verifications on the RIC group selector, road selector, electric valve, drive motor, winding reel motor, synchronous motor and other equipment, To ensure the availability of the RIC system. The design of the RIC special test device includes a notebook computer (host computer) and related test control software, a test bench box (test box), a set of data acquisition and control system and several signal cables.

In this embodiment, the input and output interfaces of the RIC special test device connected with the RIC system include: 3 interfaces connected with the drive unit; 1 interface connected with the selector and 1 interface connected with the electric valve. The power supply of the RIC special test device is divided into two ways: one way is 380VAC, which supplies power for the driving motor; one way is 220VAC, which is the power supply for the special test device. The RIC special test device provides five signal interfaces, which are respectively used to connect the test device and different measured objects.

In this embodiment, for the test of RIC selector, it is mainly used for the state control of group selector and road selector, the measurement of the time when the selector rotates at a certain position, and the start/stop current and work of the selector motor and clutch Current measurement, switch contact resistance measurement, compare the result with the given standard, and judge whether it is qualified or not.

In this embodiment, the test of the RIC electric valve is mainly used for the state control of 50 electric valves, the measurement of the time during the valve opening or closing rotation, the start/stop current and working current measurement of the drive motor, the valve opening and closing Measure the state of the micro switch at the off position and the closing resistance value of the switch contact, compare the result with the given standard, and judge whether it is qualified.

In this embodiment, the test of the RIC drive unit is mainly used for the control and current test of drive motors, reel motors, synchronous motors, limit safety switches and other equipment.

In this embodiment, regarding the hardware design, the test box of the RIC special test device is selected from Pelican small safety box. The safety box is waterproof, shockproof and dustproof. The data acquisition and control system consists of a cDAQ chassis, several input/output modules, high-power relays, circuit breakers and so on.

The laptop has built-in test control software to realize the analysis, display and processing of field data. The notebook computer establishes a data connection with the test bench body through the wireless WIFI communication interface. Laptop with virtual keyboard and stylus. It is convenient for test personnel to operate with gloves on site. In order to meet the test requirements, the design uses NI 9475 to control the relay to realize output control. The NI 9475 can directly interface with a variety of industrial devices, such as solenoids, motors, actuators, relays, and lighting equipment. In order to meet the requirements of voltage signal acquisition, the design uses NI 9201 voltage acquisition card and NI 9229 voltage acquisition card. Among them, NI 9201 is a channel-to-ground isolation voltage acquisition card, and NI 9229 is an isolation voltage acquisition card between channels. In order to meet the current signal acquisition requirements, a current transmitter is designed to convert the measured current signal into a voltage signal, and then use NI9201 to collect the output voltage of the current transmitter. In order to meet the three-phase AC current signal acquisition requirements of the 380VAC driving motor, a three-phase AC current transmitter is designed to measure the operating current of the driving motor and the operating current of the brake coil. After the current is converted into a voltage signal, it is collected by NI 9201. In order to meet the measurement of the output waveform of the synchronous motor (synchronizer), the FB900C angle position transmitter is designed to realize the power supply and feedback signal acquisition of the synchronous motor. The device can convert the feedback signal into an angle and transmit it to the acquisition system through the RS232 communication interface. In order to meet the test requirements, the design uses NI 9437 to collect the position switch status and micro switch status. In order to meet the measurement requirements of the contact resistance of micro switches and magnetic switches used for position feedback, the design uses NI 9219 for resistance measurement. When measuring the contact resistance of multiple inlet micro switches and position feedback switches, the channel multiplexing design is adopted to reduce the number of NI 9219 measurement channels used. The recording of the switching action time of the electric valve is designed to use software timing to realize time measurement. Taking the closing time of the control relay as T0, and the state signal change time of the electric valve collected by NI 9437 as T1, then the switching action time of the electric valve is T=T1-T0. The selector rotates a record of time, and the design adopts software timing to realize time measurement. The timer starts when the software controls the output of the NI 9475 (T0), and the timer stops when the NI 9437 collects the feedback signal from the position switch (T1). Rotation time T=T1-T0.

In this embodiment, regarding the software design, the special test device software mainly includes three functional modules of RIC selector test, RIC electric valve test and RIC drive unit test, each functional module includes manual and automatic control of equipment, data display, Data analysis, historical data playback, and report printing functions, the main interface of the program is shown in Figure 2. After running the program, a dialog box pops up, requiring input of the overhaul number for this test, as shown in Figure 3. After entering the information and clicking OK, the overhaul number cannot be modified during this test.

Taking the RIC selector test function module as an example, the design of each functional interface of the software is briefly described as follows:

In the data acquisition interface, click the "Parameter Configuration" button on the interface to change the test parameters. A user may select a selector under test, such as group selector 110ZL, from the operator interface. Related test data will be stored in separate folders for different test selectors. Users need to choose manual or automatic test according to the actual situation. The main interface of data collection in manual test mode of this test function is shown in Figure 4, and the main interface of data collection in automatic test mode of this test function is shown in Figure 5. When you click "Parameter Settings", you will enter the interface shown in Figure 5. After selecting the path where the file is located and clicking "View Drawings Online", the electronic file of the drawing will pop up.

Regarding data storage, during automatic and manual execution, the software automatically stores time and current test data. Managed according to folders named overhaul numbers. For example: D:\Result\Selector\[overhaul number]_[selector number]\. For other data on the interface, you need to click the "Save Data" button on the interface to save. A test generates a data file, and the file naming format is: Selector_[selector number]_[date]_[time].tdms. Among them, the date format is YYYYMMDD; the time format is HHMMSS. For example: D:\Result\Selector\SITExxx_1\Selector_110ZL_20150115_155436.tdms.

Regarding data analysis and image playback, combined with Figure 7, the user can select any test data from any selector, and the value of each test item will be automatically calculated and displayed in the table. If the test parameters exceed the default judgment rules, an alarm signal will be given and displayed in red. The image playback will display the corresponding three curves, that is, clutch current, motor current, clutch + motor current display. The user can click the print button to export the test data to an Excel file, as shown in Figure 8.

Compared with the AREVA test chamber of the prior art, the RIC special test device of the present application has the following advantages and beneficial effects:

1. Using computer-based and digital acquisition and processing technology, it is suitable for all detection items of RIC neutron measurement equipment, and has digital online detection, analysis and historical data analysis and traceability functions.

2. The design fully considers the requirements of maintenance procedures, covering all the required content in the test and ensuring the integrity of the test.

3. From the user's point of view, the hardware connection integration is simplified, the human interface software design is beautiful and simple, and the operation is simple and fast, which greatly reduces the difficulty of test operation, and also reduces the risk of test redo due to human error.

4. The test device has a high degree of automation, and the data can be automatically stored during the test, eliminating the need for personnel to manually test and record data. After the test, the analysis and comparison of the test data can be automatically completed, and a report on whether the test results are qualified or not is given. The test period is saved.

5. By continuously measuring and recording the working voltage, current, magnetic switch action state, micro switch action state and contact resistance value and other data during the operation process of RIC equipment, the dynamic process health status of the equipment can be detected and analyzed, while the original The test box can only manually test the transient data function at a certain moment, and cannot test the voltage and current curve changes during the operation of the equipment, nor has the function of measuring data such as the magnetic switch action state and the contact resistance value of the micro switch action.

6. The degree of portability has been greatly improved, and the wireless notebook can be brought back to the office, so that the maintenance personnel can print out the maintenance test data immediately after work or archive it for a long time; in addition, no additional paper drawings are needed during equipment inspection. The software can view the equipment drawings of different units of each power plant online.

7. Added the operation performance test function of RIC drive motor, which can be connected to a 220VAC power box in the RIC room. There is a transformer inside the device, which can generate three-phase 380VAC voltage, which is used for the action test of 380VAC two-speed drive motor.

Moreover, the special test device for RIC of this application has successfully solved the problems such as the difficulty in checking the equipment of the RIC neutron flux measurement system in the existing overhaul work of nuclear power plants in various bases, the difficulty in analyzing data after the test, and the inability to track and analyze the trend of equipment status, etc. It can effectively improve the maintenance quality and efficiency of RIC neutron flux measurement system equipment. The RIC test device can be applied to the maintenance and performance test of the RIC neutron flux measurement system equipment of nuclear power plants using the same type of equipment in the group. Potential users outside the group include Qinshan Nuclear Power Plant, Fuqing Nuclear Power Plant, Hainan Changjiang Nuclear Power Plant, and related nuclear power plants of the same type of EDF units.

Contributions made by this application to CNOC productivity:

1. Improve the efficiency of RIC overhaul work, and make the maintenance of RIC room equipment more convenient and efficient. It can reduce the maintenance period of RIC overhaul, save the critical path of overhaul, and reduce the radiation dose of maintenance personnel.

2. Improve the quality of overhaul and overhaul of RIC system equipment, and improve the reliability of RIC system equipment operation.

3. Collect RIC equipment health status information, which can store all neutron equipment historical maintenance data and information, which is conducive to the diagnosis and analysis of equipment failures during daily periods, and can track and analyze the trend of equipment health status, which is a preventive maintenance plan and provide a basis for strategic decision-making.

4. It can be promoted to power plants in various bases inside and outside the group, and the production and sales of this set of devices can generate income for the company.

Fig. 9 is a flow chart of Embodiment 1 of the special test method for the core neutron measurement system of a pressurized water reactor nuclear power plant according to the present invention. Firstly, it is explained that the core neutron measurement system mainly includes a selector, an electric valve and a drive unit. This embodiment The dedicated test method for core neutron measurement system is used to test devices such as selectors, electric valves and drive units. The test method of this embodiment comprises:

S10. The host computer obtains the test control signal corresponding to the test device input by the tester, and sends it to the test box, wherein the test box contains a wireless module, a control board and a plurality of test boards;

S20. The wireless module receives the test control signal from the host computer, and outputs it to the control board;

S30. The control board distributes the received test control signal to a corresponding test board, and collects a test response signal returned by the test board;

S40. The wireless module sends the test response signal output by the control board to the host computer;

S50. The host computer records and analyzes the test response signal sent by the test box, and outputs the analysis result.

Further, the special test method for the neutron measurement system of the pressurized water reactor nuclear power plant core of the present invention also includes:

The host computer judges whether the test response signal exceeds a preset corresponding standard value, and if so, outputs an alarm signal.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of the claims of the present invention.

Claims (10)

1. A special test device for the core neutron measurement system of a pressurized water reactor nuclear power plant, used to test selectors, electric valves and drive units in the core neutron measurement system, characterized in that the special test device includes : test box, upper computer, wherein, wireless module, control panel and a plurality of test panels are housed in the test box, and the test panel is connected with the corresponding device to be tested, wherein, The host computer is used to obtain the test control signal corresponding to the test device input by the tester, and send it to the test box; and record and analyze the test response signal sent by the test box, and output the analysis result; The wireless module is used to receive the test control signal from the host computer, output it to the control board, and send the test response signal output by the control board to the host computer; The control board is used for distributing the received test control signals to corresponding test boards, and collecting test response signals returned by the test boards. 2. the special test device for the neutron measurement system of the pressurized water reactor nuclear power plant core according to claim 1, is characterized in that, The host computer is also used to judge whether the test response signal exceeds a preset corresponding standard value, and if so, output an alarm signal. 3. pressurized water reactor nuclear power plant core neutron measurement system special testing device according to claim 1, is characterized in that, The host computer is also used to output the analysis results in the form of graphics, curves, charts or warning lights; or The upper computer is used to output the analysis result by printing. 4. pressurized water reactor nuclear power plant core neutron measurement system special testing device according to claim 1, is characterized in that, The host computer is also used to store the test response signal and the analysis result. 5. the special test device for the neutron measurement system of the pressurized water reactor nuclear power plant core according to claim 1, is characterized in that, The upper computer is also used to receive an online drawing viewing request input by a user, and call out and display an electronic file of a corresponding drawing from pre-stored drawings according to the drawing online viewing request. 6. according to any one of claim 1-5, the special test device for the neutron measurement system in the core of the pressurized water reactor nuclear power plant, is characterized in that, the test device is a selector, and, The test control signal includes a path selection control command and a state control signal of the selector; The test response signal includes: A time signal between sending out the path selection control command and receiving the feedback signal of the microswitch at the specific position of the corresponding path; The working current signal of the motor and clutch in the selector and the start and stop current signals; Microswitches at the entrance of the selector and status signals of microswitches at specific positions in the channel; The closed contact resistance value of the microswitch at the inlet of the selector and the microswitch at the specific position of the channel. 7. according to any one of claim 1-5, the special test device for the neutron measurement system in the core of the pressurized water reactor nuclear power plant, is characterized in that, the test device is an electric valve, and, The test control signal includes a state control command of the electric valve; The test response signal includes: Status signal of the microswitch in the open and closed position of the electric valve The closed contact resistance value of the micro switch at the open and close position of the electric valve; The time signal of the electric valve from opening to closing. 8. according to any one of claim 1-5, the special test device for the core neutron measurement system of the pressurized water reactor nuclear power plant, is characterized in that, the test device is a drive unit, and the drive unit includes a drive motor, a winding Reel motors and synchronous motors, The test control signal includes: forward/backward, high speed/low speed control commands of the drive motor; The test response signal includes: Working current signal and starting current signal of drive motor, winding reel motor and synchronous motor; Status signal of limit safety switch; Closed contact resistance value of the limit safety switch. 9. A special test method for the core neutron measurement system of a pressurized water reactor nuclear power plant, which is used to test the selector, electric valve and drive unit in the core neutron measurement system, characterized in that it includes: The host computer obtains the test control signal corresponding to the test device input by the tester, and sends it to the test box, wherein the test box is equipped with a wireless module, a control board and a plurality of test boards; The wireless module receives the test control signal from the host computer and outputs it to the control board; The control board distributes the received test control signal to the corresponding test board, and collects the test response signal returned by the test board; The wireless module sends the test response signal output by the control board to the host computer; The upper computer records and analyzes the test response signal sent by the test box, and outputs the analysis result. 10. the special test method for the neutron measurement system of the pressurized water reactor nuclear power plant core according to claim 9, is characterized in that, also comprises: The host computer judges whether the test response signal exceeds a preset corresponding standard value, and if so, outputs an alarm signal.