WO2020186776A1

WO2020186776A1 - Nuclear power plant reactor control rod addressing apparatus and method

Info

Publication number: WO2020186776A1
Application number: PCT/CN2019/116776
Authority: WO
Inventors: 张军; 高夫领; 刘美军; 李生茂; 孙波; 罗红波; 王斌; 蔡达水; 犹代伦
Original assignee: 中广核核电运营有限公司; 中国广核集团有限公司; 中国广核电力股份有限公司
Priority date: 2019-03-15
Filing date: 2019-11-08
Publication date: 2020-09-24
Also published as: EP3836163A1; CN109920569B; EP3836163B1; CN109920569A; EP3836163A4

Abstract

Provided are a nuclear power plant reactor control rod addressing apparatus and method. The addressing apparatus comprises a plurality of control rods, a driving power supply, lifting coils (LCs) and a voltage detector, wherein each control rod comprises a rod position probe (10) and a rod stroke cover (20); the rod position probe (10) and the lifting coils (LCs) are mounted on the rod stroke cover (20), and the rod position probe (10) and the lifting coils (LCs) are mounted coaxially; the rod position probe (10) comprises secondary coils (106); the driving power supply is connected to each of the lifting coils (LCs) respectively; and the voltage detector is connected to the secondary coil (106) of each rod position probe (10) respectively. The method comprises: the driving power supply selectively switching on one lifting coil (LC), and the lifting coil (LC) generating a first induced magnetic field (S301); the secondary coil which is coaxially arranged with the lifting coil (LC) generating a first induced voltage under the action of the first induced magnetic field (S302); and the voltage detector completing the addressing of the control rods by detecting the first induced voltage (S303). The beneficial effects are that the workload of an operator can be reduced, the risk caused by human factor failure is reduced, the risk caused by communication failure is reduced, and the working efficiency and safety are greatly improved.

Description

Addressing device and method for control rod of nuclear power plant reactor

Technical field

The invention relates to the field of nuclear power plants, and more specifically, to a device and method for addressing control rods of a nuclear power plant reactor.

Background technique

The control rod control system is one of the special systems for nuclear power plants. It contains two parts: the rod control system and the rod position measurement system. The cable spans the reactor bridge to connect the equipment on both sides. During the refueling and overhaul process, in order to open the reactor cover, you must The joints of the rod control cable and the rod test cable are all disconnected, and the cable needs to be reconnected after the large cover is closed at the end of the refueling to ensure the usability of the RGL system.

For example, in the M310 and CRP1000 stacks, there are 61 rod control cables and 61 test cables each. In order to ensure the correct connection of the two types of cables, the control rod search must be performed in the cooling shutdown mode of the waste heat removal system. Site test to confirm that the connection does not cross. The current addressing test method is as follows:

1. Lock all rod bundles of a rod group except the first rod group, and raise this rod group for 10 steps;

2. Confirm that the measuring rod position of the first beam of the rod group is increased by 8 steps (the smallest unit is 8 steps);

3. Unlock the locking rod bundle;

4. Lock all rod bundles in this rod group except the second rod group, and raise this rod group for 10 steps;

5. Confirm that the rod position of the second beam of the rod group is increased by 8 steps (the smallest unit is 8 steps);

6. Complete the single beam lifting of all rod bundles in this rod group according to this method, and confirm the corresponding measurement rod position change;

7. Complete the control rod addressing of all rod groups according to this method, and confirm that the rod control channel and the rod measurement channel correspond one to one.

Although the existing solutions can complete the test, they have the following disadvantages:

1. The main control operator is required to perform a large number of operations, which increases the burden of the operating personnel and increases the risk of human failure, which is not conducive to the control of the unit status;

2. The control rod has moved, which changes the reactivity of the primary loop, which is not conducive to reactivity control;

3. It needs to communicate with the operator many times, which increases the risk of communication failure;

4. The operator needs to perform a large number of unit status control tasks such as heating and boosting, which causes the addressing test to be interrupted many times. An addressing test lasts from 5 to 20 hours, which increases the uncertainty of the test.

Summary of the invention

technical problem

The technical problem to be solved by the present invention is to provide a nuclear power plant reactor control rod addressing device and method in view of the above-mentioned defects in the prior art.

The solution to the problem

Technical solutions

The technical solution adopted by the present invention to solve its technical problems is to construct a nuclear power plant reactor control rod addressing device, which includes multiple control rods, a driving power source, a lifting coil LC, and a voltage detector; the control rod includes a rod position probe And rod stroke cover, the rod position probe and the lifting coil LC are installed on the rod stroke cover, and the rod position probe and the lifting coil LC are coaxially installed; the rod position probe includes a secondary coil ；

The driving power supply is respectively connected to each of the lifting coils LC, and the voltage detector is respectively connected to the secondary coil of each of the rod position probes;

The driving power supply selectively turns on the lifting coil LC, the lifting coil LC generates a first induced magnetic field, and the secondary coil arranged coaxially with the lifting coil LC generates under the action of the first induced magnetic field The first induced voltage is used by the voltage detector to complete the addressing of the control rod by detecting the first induced voltage.

Further, in the addressing device for the control rod of the nuclear power plant reactor of the present invention, the rod position probe further includes a primary coil, and the primary coil and the secondary coil are installed coaxially;

The primary coil is connected to the AC power supply and generates a second induced magnetic field, the secondary coil generates a second induced voltage under the action of the second induced magnetic field, and the voltage detector detects the first induced voltage and The second induced voltage completes the addressing of the control rod.

Further, in the addressing device for the control rod of the nuclear power plant reactor of the present invention, the rod position probe further includes an auxiliary coil, the auxiliary coil is coaxially installed with the primary coil, and the auxiliary coil is connected to the AC power supply;

The auxiliary coil generates a third induced voltage under the action of the second induced magnetic field, and the AC power supply adjusts an output current according to the third induced voltage.

Further, in the addressing device for the control rod of a nuclear power plant reactor of the present invention, the voltage detector is an MCP22 encoding module, and the terminal 10 of the MCP22 encoding module is connected to the secondary coil.

In addition, the present invention also provides a method for addressing control rods of a nuclear power plant reactor, including:

The driving power supply alternatively turns on the lifting coil LC, and the lifting coil LC generates the first induced magnetic field;

The secondary coil of the rod probe generates a first induced voltage under the action of the first induced magnetic field;

The voltage detector completes the addressing of the control rod by detecting the first induced voltage.

Further, in the method for addressing control rods of a nuclear power plant reactor according to the present invention, the driving power source selectively turning on the lifting coil LC includes:

The driving power supply alternatively turns on the lifting coil LC and inputs a preset test current.

Further, in the method for addressing control rods of a nuclear power plant reactor according to the present invention, the voltage detector completing the addressing of the control rods by detecting the first induced voltage includes:

Determine whether the first induced voltage is greater than a preset induced voltage;

If yes, confirm that the rod position probe corresponds to the lifting coil LC;

If not, confirm that the rod position probe does not correspond to the lifting coil LC.

Further, in the method for addressing control rods of a nuclear power plant reactor according to the present invention, before the driving power source is selectively turned on the lifting coil LC, the method further includes:

The primary coil of the rod position probe is connected to an AC power supply and generates a second induced magnetic field;

The secondary coil generates a second induced voltage under the action of the second induced magnetic field;

Then the voltage detector completing the addressing of the control rod by detecting the first induced voltage includes: the voltage detector completing the addressing of the control rod by detecting the first induced voltage and the second induced voltage .

Further, in the method for addressing control rods of a nuclear power plant reactor according to the present invention, after the secondary coil generates a second induced voltage under the action of the second induced magnetic field, the method further includes:

A Gray code is generated according to the second induced voltage, and the corresponding rod position of the rod position probe is determined.

Further, in the method for addressing control rods of a nuclear power plant reactor according to the present invention, the method further includes:

The auxiliary coil of the rod position probe generates a third induced voltage under the action of the second induced magnetic field;

The AC power supply adjusts an output current according to the third induced voltage.

The beneficial effects of the invention

Beneficial effect

A device and method for addressing control rods of a nuclear power plant reactor implementing the present invention has the following beneficial effects: the device includes multiple control rods, a driving power source, a lifting coil LC, and a voltage detector; the control rod includes a rod position probe and a rod stroke Cover, rod position probe and lifting coil LC are installed on the rod stroke cover, and rod position probe and lifting coil LC are installed coaxially; rod position probe includes secondary coil; driving power is connected to each lifting coil LC, voltage detector respectively Connect the secondary coil of each rod position probe; the driving power is switched on by the lifting coil LC, the lifting coil LC generates the first induced magnetic field, and the secondary coil coaxially arranged with the lifting coil LC generates the first induced magnetic field. An induced voltage, the voltage detector completes the addressing of the control rod by detecting the first induced voltage. The implementation of the present invention can reduce the workload of the operator, reduce the risk of human failure, reduce the risk of communication failure, and greatly improve work efficiency and safety.

Brief description of the drawings

Description of the drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments. In the accompanying drawings:

FIG. 1 is a schematic structural diagram of a rod position probe provided by an embodiment of the present invention;

2 is a schematic diagram of the structure of a control rod addressing device for a nuclear power plant reactor according to an embodiment of the present invention;

3 is a flowchart of a method for addressing control rods of a nuclear power plant reactor according to an embodiment of the present invention;

4 is a flowchart of a method for addressing control rods of a nuclear power plant reactor according to an embodiment of the present invention;

Figure 5 is a flow chart of output current adjustment provided by an embodiment of the present invention;

Fig. 6 is a graph of test results provided by an embodiment of the present invention.

The best embodiment for implementing the invention

The best mode of the invention

In order to have a clearer understanding of the technical features, objectives and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Invention embodiment

Example

The nuclear power plant reactor control rod addressing device of this embodiment includes multiple control rods, a driving power supply, a lifting coil LC, and a voltage detector. Each control rod is provided with a lifting coil LC, but it is necessary to ensure that the control rod and the lifting coil are preset Correspondence.

Referring to FIG. 1, it is a schematic diagram of the structure of the rod probe 10. The rod position probe 10 includes a fixed flange 101, a connector 102, a primary coil 103, a shielding cover 104, a coil holder 105, a secondary coil 106, an auxiliary coil 107, an adjustment spring 108, and an intermediate washer 109; preferably, the secondary coil 106 There are five and the number of auxiliary coils 107 is two. The primary coil 103, the secondary coil 106, and the auxiliary coil 107 are all wound on the coil support 105. The primary coil 103 is connected to the AC power supply through the connector 102, and the voltage detector is respectively connected to the secondary coil 106 of each rod probe 10 . The intermediate washer 109 is arranged between the primary coil 103, the secondary coil 106, and the auxiliary coil 107 at intervals. The fixed flange 101 is installed at one end of the rod position probe 10, and the adjustment spring 108 is arranged adjacent to the fixed flange 101.

2, the control rod includes a rod position probe 10 and a rod travel cover 20. The drive coil 30 includes a lifting coil LC, a moving coil MG, and a clamping coil SG. The rod position probe 10, lifting coil LC, moving coil MG, and clamping The holding coil SG is installed on the rod stroke cover 20, and the rod position probe 10, the lifting coil LC, the moving coil MG, and the clamping coil SG are coaxially installed. The driving power supply is respectively connected to each lifting coil LC. Alternatively, the voltage detector is an MCP22 encoding module, and the terminal 10 of the MCP22 encoding module is connected to the secondary coil 106.

In the addressing process, the driving power supply turns on the lifting coil LC by one, that is, blocking all other control rods except the control rod to be tested, select one of the lifting coil LC and input the preset test current, for example, the preset test current is 41.6 A. The lifting coil LC generates the first induced magnetic field under the action of the preset test current. At this time, the secondary coil 106 arranged coaxially with the lifting coil LC generates a first induced voltage under the action of the first induced magnetic field, and the secondary coil 106 of other rod probes 10 arranged on a different axis from the lifting coil LC is in the first An induced voltage will also be generated under the action of the induced magnetic field, but the effect of the magnetic field is greatly weakened due to the different axis and the longer distance, so the induced voltage will be much smaller than the first induced voltage. The voltage detector can determine whether the secondary coil 106 corresponds to the energized lifting coil LC by detecting the magnitude of the first induced voltage. The secondary coil with the first induced voltage much greater than other induced voltages corresponds to the lifting coil LC. Coil; and then determine whether the rod position probe 10 corresponds to the drive coil 30, and complete the addressing of the control rod.

Further, repeat the above actions to complete the addressing of all control rods.

In this embodiment, a preset test current is applied to the lifting coil LC to generate the first induced magnetic field, and then the addressing of the control rod is completed according to the induced voltage generated by the secondary coil 106. The entire process does not need to move the control rod, which greatly reduces the number of operators. The amount of operation, reduce the risk of human failure, reduce the risk of communication failure, and greatly improve work efficiency and safety.

Example

On the basis of the foregoing embodiment, the primary coil 103 and the secondary coil 106 of the rod position probe 10 of the nuclear power plant reactor control rod addressing device of this embodiment are coaxially installed, and the primary coil 103 is connected to the AC power supply through the connector 102.

In the addressing process, this embodiment first connects the primary coil 103 with a sine wave alternating current. After the primary coil 103 is connected to the AC power supply, a second induced magnetic field is generated. The secondary coil 106 generates a second induced magnetic field under the action of the second induced magnetic field. Voltage, the second induced voltage generated by the secondary coil 106 of all the rod position probes 10 is recorded. Further, the driving power supply turns on the lifting coil LC by one, that is, blocking all other control rods except the control rod to be tested, select one of the lifting coils LC and input the preset test current, for example, the preset test current is 41.6A, the lifting coil The LC generates the first induced magnetic field under the action of the preset test current. At this time, the secondary coil 106 arranged coaxially with the lifting coil LC generates a first induced voltage under the action of the first induced magnetic field, and the secondary coil 106 of other rod probes 10 arranged on a different axis from the lifting coil LC is in the first An induced voltage will also be generated under the action of the induced magnetic field, but the effect of the magnetic field is greatly weakened due to the different axis and the longer distance, so the induced voltage will be much smaller than the first induced voltage. After the test, the voltage detector completes the addressing of the control rod by detecting the first induced voltage and the second induced voltage, that is, the addressing of the control rod is completed by the difference between the first induced voltage and the second induced voltage.

In this embodiment, the addressing of the control rod is completed by the difference between the first induced voltage and the second induced voltage. There is no need to move the control rod in the whole process, which greatly reduces the amount of operator operation, reduces the risk of human failure, and reduces communication failure Risks greatly improve work efficiency and safety.

In some embodiments, the rod position probe 10 of the nuclear power plant reactor control rod addressing device further includes an auxiliary coil 107, which is coaxially installed with the primary coil 103, and the auxiliary coil 107 is connected to the AC power supply; the auxiliary coil 107 is in the second induced magnetic field A third induced voltage is generated under the action of, and the AC power supply adjusts the output current according to the third induced voltage.

Example

As shown in FIG. 3, the nuclear power plant reactor control rod addressing method of this embodiment is applied to the above-mentioned nuclear power plant reactor control rod addressing device. The structure of the nuclear power plant reactor control rod addressing device can refer to the foregoing embodiment. Specifically, the addressing method for the control rod of the nuclear power plant reactor includes:

S301: The driving power supply turns on the lifting coil LC alternatively, and the lifting coil LC generates a first induced magnetic field. The driving power to selectively turn on the lifting coil LC includes: the driving power to selectively turn on the lifting coil LC and input the preset test current, that is, to block all other control rods except the control rod to be tested, and input the preset test current, such as the preset test current. Suppose the test current is 41.6A.

S302. The secondary coil 106 of the rod probe 10 generates a first induced voltage under the action of the first induced magnetic field. The secondary coil 106 arranged coaxially with the lifting coil LC generates a first induced voltage under the action of the first induced magnetic field, and the secondary coil 106 of other rod probes 10 arranged on a different axis from the lifting coil LC acts on the first induced magnetic field Induced voltage will also be generated when moving downwards, but the effect of the magnetic field is greatly weakened due to the different axis and the long distance, so the induced voltage will be much smaller than the first induced voltage.

S303: The voltage detector completes the addressing of the control rod by detecting the first induced voltage. The voltage detector can determine whether the secondary coil 106 corresponds to the energized lifting coil LC by detecting the magnitude of the first induced voltage. The secondary coil with the first induced voltage much greater than other induced voltages corresponds to the lifting coil LC. Coil; and then determine whether the rod position probe 10 corresponds to the drive coil 30, and complete the addressing of the control rod.

Alternatively, the voltage detector to complete the addressing of the control rod by detecting the first induced voltage includes:

Determine whether the first induced voltage is greater than the preset induced voltage, which is less than the induced voltage generated when the secondary coil 106 and the lifting coil LC are coaxial, and at the same time greater than the adjacent and different axis of the secondary coil 106 and the lifting The induced voltage generated by the coil LC.

If the first induced voltage is greater than the preset induced voltage, it is confirmed that the rod position probe 10 corresponds to the lifting coil LC.

If the first induced voltage is not greater than the preset induced voltage, it is confirmed that the rod position probe 10 does not correspond to the lifting coil LC.

Example

As shown in Fig. 4, on the basis of the above-mentioned embodiment, the method for addressing the control rod of the nuclear power plant reactor of this embodiment, before the driving power source is selectively turned on the lifting coil LC, the method further includes:

S401. The primary coil 103 of the rod position probe 10 is connected to the AC power supply and generates a second induced magnetic field. Because the primary coil 103 and the secondary coil 106 are coaxially arranged, the secondary coil 106 can generate an induced voltage under the action of the second induced magnetic field. .

S402, the secondary coil 106 generates a second induced voltage under the action of the second induced magnetic field, and records the second induced voltage generated by the secondary coil 106 of all the rod position probes 10.

S403. The voltage detector completes the addressing of the control rod by detecting the first induced voltage and the second induced voltage, that is, the addressing of the control rod is completed by the difference between the first induced voltage and the second induced voltage, the first induced voltage The secondary coil whose difference from the second induced voltage is much larger than the other induced voltages is the coil corresponding to the lifting coil LC, and then it is determined whether the rod position probe 10 corresponds to the driving coil 30.

Further, in the addressing method for the control rod of the nuclear power plant reactor of this embodiment, after the secondary coil 106 generates the second induced voltage under the action of the second induced magnetic field, the method further includes:

The Gray code is generated according to the second induced voltage, and the corresponding rod position of the rod position probe 10 is determined.

For example, perform actual measurement on rod bundle 1 and rod bundle 2. In the test process, when the control rods are in 5 steps, select the two adjacent control rod bundles 1 and 2 in the spatial arrangement, and change the 10 and 1 of the MCP22 module. Both ends are connected to the recorder, and a large current of 41.6A is triggered on the lifting coil LC of rod bundle 1, and the induced potential of the secondary coil 106 of the MCP22 module of rod bundle 1 changes by about 500 mV, while the secondary coil of rod bundle 2 106 The induced potential change is below 10uV, and the difference in the order of magnitude is directly reflected on the graph. The change of rod bundle 1 is very obvious, and rod bundle 2 basically has no change. For details, see Figure 6. The upper curve is rod bundle 1, and the lower curve is rod Bundle 2.

Example

As shown in Figure 5, on the basis of the foregoing embodiment, the method for addressing control rods of a nuclear power plant reactor in this embodiment further includes a feedback adjustment step of the AC power supply:

S501: The primary coil 103 of the rod position probe 10 is connected to an AC power supply and generates a second induced magnetic field;

S502. The auxiliary coil 107 of the rod probe 10 generates a third induced voltage under the action of the second induced magnetic field;

S503. The AC power supply adjusts the output current according to the third induced voltage.

In some embodiments, it was successfully applied in the overhaul of Hongyanhe 203. The entire addressing test was completely completed by the instrument control personnel. During this period, the control rod was not lifted. The total duration was about 1 hour. The effect was remarkable and fully met the expectations. It saves 6 hours of overhaul construction period, saves labor hours from 4 to 19:00*4 people, reduces the risk of control rod addressing test communication failure, and improves the unit status and core reactivity control level during the overhaul, thereby improving the safe operation level and economy of the unit benefit.

The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

Professionals may further realize that the units and algorithm steps of the examples described in the embodiments disclosed in this article can be implemented by electronic hardware, computer software, or a combination of both, in order to clearly illustrate the possibilities of hardware and software. Interchangeability. In the above description, the composition and steps of each example have been generally described in accordance with the function. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of the present invention.

The steps of the method or algorithm described in combination with the embodiments disclosed herein can be directly implemented by hardware, a software module executed by a processor, or a combination of the two. The software module can be placed in random access memory RAM, internal memory, read-only memory ROM, electrically programmable ROM, electrically erasable programmable ROM, register, hard disk, removable disk, CD-ROM, or any other known in the technical field Form of storage media.

The above embodiments are only to illustrate the technical ideas and features of the present invention, and their purpose is to enable those familiar with the technology to understand the content of the present invention and implement them accordingly, and cannot limit the protection scope of the present invention. All equivalent changes and modifications made to the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

Claims

A nuclear power plant reactor control rod addressing device, which is characterized by comprising a plurality of control rods, a driving power supply, a lifting coil LC, and a voltage detector; the control rod includes a rod position probe (10) and a rod travel cover (20) , The rod position probe (10) and the lifting coil LC are installed on the rod travel cover (20), and the rod position probe (10) and the lifting coil LC are coaxially installed; the rod position The probe (10) includes a secondary coil (106);

The driving power supply is respectively connected to each of the lifting coils LC, and the voltage detector is respectively connected to the secondary coil (106) of each of the rod position probes (10);

The driving power supply alternatively turns on the lifting coil LC, the lifting coil LC generates a first induced magnetic field, and the secondary coil (106) arranged coaxially with the lifting coil LC is in the first induced magnetic field A first induced voltage is generated under the action, and the voltage detector completes the addressing of the control rod by detecting the first induced voltage.
The nuclear power plant reactor control rod addressing device according to claim 1, wherein the rod position probe (10) further comprises a primary coil (103), the primary coil (103) and the secondary coil (106) ) Coaxial installation;

The primary coil (103) is connected to the AC power supply and generates a second induced magnetic field, the secondary coil (106) generates a second induced voltage under the action of the second induced magnetic field, and the voltage detector passes the detection The first induced voltage and the second induced voltage complete the addressing of the control rod.
The nuclear power plant reactor control rod addressing device according to claim 2, wherein the rod position probe (10) further comprises an auxiliary coil (107), the auxiliary coil (107) and the primary coil (103) Coaxial installation, the auxiliary coil (107) is connected to the AC power supply;

The auxiliary coil (107) generates a third induced voltage under the action of the second induced magnetic field, and the AC power supply adjusts an output current according to the third induced voltage.
The nuclear power plant reactor control rod addressing device according to claim 3, characterized in that there are five secondary coils (106) and two auxiliary coils (107).
The nuclear power plant reactor control rod addressing device according to claim 3, wherein the rod position probe (10) further comprises a coil support (105), the primary coil (103) and the secondary coil (106) ) And the auxiliary coil (107) are wound on the coil support (105).
The nuclear power plant reactor control rod addressing device according to claim 5, wherein the rod position probe (10) further comprises a fixed flange (101), a connector (102) and an adjusting spring (108), A fixed flange (101) is installed at one end of the rod position probe (10), the adjustment spring (108) is arranged adjacent to the fixed flange (101), and the primary coil (103) is connected through the The device (102) is connected to an AC power supply.
The nuclear power plant reactor control rod addressing device according to claim 5, wherein the rod position probe (10) further comprises an intermediate washer (109), and the intermediate washer (109) is arranged at intervals on the primary coil ( 103) Between the secondary coil (106) and the auxiliary coil (107).
The nuclear power plant reactor control rod addressing device according to claim 1, further comprising a driving coil (30), the driving coil (30) includes a lifting coil LC, a moving coil MG, and a clamping coil SG. The rod position probe (10), the lifting coil LC, the moving coil MG, and the clamping coil SG are installed on the rod stroke cover (20), and the rod position probe (10), the lifting coil The coil LC, the moving coil MG, and the clamping coil SG are coaxially installed.
The control rod addressing device for a nuclear power plant reactor according to claim 1, wherein the voltage detector is an MCP22 encoding module, and the terminal 10 of the MCP22 encoding module is connected to the secondary coil (106).
A method for addressing control rods of a nuclear power plant reactor, which is characterized in that it comprises:

The driving power supply alternatively turns on the lifting coil LC, and the lifting coil LC generates the first induced magnetic field;

The secondary coil (106) of the rod probe (10) generates a first induced voltage under the action of the first induced magnetic field;

The voltage detector completes the addressing of the control rod by detecting the first induced voltage.
The method for addressing control rods of a nuclear power plant reactor according to claim 10, wherein the driving power source selectively turning on the lifting coil LC comprises:

The driving power supply alternatively turns on the lifting coil LC and inputs a preset test current.
The method for addressing control rods of a nuclear power plant reactor according to claim 10, wherein the completion of the addressing of the control rods by the voltage detector by detecting the first induced voltage comprises:

Determine whether the first induced voltage is greater than a preset induced voltage;

If yes, confirm that the rod position probe (10) corresponds to the lifting coil LC;

If not, it is confirmed that the rod position probe (10) does not correspond to the lifting coil LC.
The method for addressing control rods of a nuclear power plant reactor according to claim 10, characterized in that, before the driving power source is alternatively turned on the lifting coil LC, the method further comprises:

The primary coil (103) of the rod probe (10) is connected to an AC power supply and generates a second induced magnetic field;

The secondary coil (106) generates a second induced voltage under the action of the second induced magnetic field;

Then the voltage detector completing the addressing of the control rod by detecting the first induced voltage includes: the voltage detector completing the addressing of the control rod by detecting the first induced voltage and the second induced voltage .
The method for addressing control rods of a nuclear power plant reactor according to claim 13, characterized in that, after the secondary coil (106) generates a second induced voltage under the action of the second induced magnetic field, the method further comprises:

The Gray code is generated according to the second induced voltage, and the corresponding rod position of the rod position probe (10) is determined.
The method for addressing control rods of a nuclear power plant reactor according to claim 10, wherein the method further comprises:

The primary coil (103) of the rod probe (10) is connected to an AC power supply and generates a second induced magnetic field;

The auxiliary coil (107) of the rod probe (10) generates a third induced voltage under the action of the second induced magnetic field;

The AC power supply adjusts an output current according to the third induced voltage.