CN117292853A - Driving device of reactor control rod assembly - Google Patents

Driving device of reactor control rod assembly Download PDF

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Publication number
CN117292853A
CN117292853A CN202311501472.0A CN202311501472A CN117292853A CN 117292853 A CN117292853 A CN 117292853A CN 202311501472 A CN202311501472 A CN 202311501472A CN 117292853 A CN117292853 A CN 117292853A
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CN
China
Prior art keywords
control rod
assembly
reactor
rod assembly
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311501472.0A
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Chinese (zh)
Inventor
衣大勇
郭志家
石辰蕾
殷保稳
范月容
彭朝晖
姚成志
谷继品
杨孔雳
刘兴民
段天英
甄建霄
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China Institute of Atomic of Energy
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China Institute of Atomic of Energy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Institute of Atomic of Energy filed Critical China Institute of Atomic of Energy
Priority to CN202311501472.0A priority Critical patent/CN117292853A/en
Publication of CN117292853A publication Critical patent/CN117292853A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C7/00—Control of nuclear reaction
    • G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
    • G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
    • G21C7/12—Means for moving control elements to desired position
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C9/00—Emergency protection arrangements structurally associated with the reactor, e.g. safety valves provided with pressure equalisation devices
    • G21C9/02—Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse; Control elements having arrangements activated in an emergency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

Embodiments of the present invention disclose a driving apparatus for a reactor control rod assembly. The driving device includes: the pressure-bearing shell is fixedly arranged outside the reactor and is communicated with a reactor pool of the reactor; the lifting assembly is connected in the pressure-bearing shell and is used for being connected with the control rod assembly; the electromagnetic coil is fixed on the outer side of the pressure-bearing shell; the electromagnetic coil is arranged to generate electromagnetic force along the radial direction of the lifting assembly when being electrified so as to enable the lifting assembly to be connected with the control rod assembly by virtue of the electromagnetic force, and the lifting assembly is arranged to move along the axial direction of the lifting assembly so as to drive the control rod assembly to lift relative to the reactor core of the reactor in the reactor pool; after the electromagnetic coil is powered off, the electromagnetic force disappears, and the connection between the lifting assembly and the control rod assembly is disconnected, so that the control rod assembly descends, and the emergency shutdown of the reactor is realized.

Description

Driving device of reactor control rod assembly
Technical Field
The embodiment of the invention relates to the technical field of nuclear reactor reactivity control, in particular to a driving device of a reactor control rod assembly.
Background
The reactor control rods include neutron absorbing material and function to control the start-stop and reaction rate of the reactor by varying the position of the neutron absorbing material relative to the reactor core to adjust the quantity of neutrons in the reactor. To adjust the position of the neutron absorbing material, a control rod driving device is required to be connected with the reactor control rod to be responsible for controlling the movement of the reactor control rod so as to control the position of the neutron absorbing material relative to the reactor core.
Disclosure of Invention
According to one aspect of an embodiment of the present invention, a drive arrangement for a reactor control rod assembly is provided. The driving device includes: the pressure-bearing shell is fixedly arranged outside the reactor and is communicated with a reactor pool of the reactor; the lifting assembly is connected in the pressure-bearing shell and is used for being connected with the control rod assembly; the electromagnetic coil is fixed on the outer side of the pressure-bearing shell; the electromagnetic coil is arranged to generate electromagnetic force along the radial direction of the lifting assembly when being electrified so as to enable the lifting assembly to be connected with the control rod assembly by virtue of the electromagnetic force, and the lifting assembly is arranged to move along the axial direction of the lifting assembly so as to drive the control rod assembly to lift relative to the reactor core of the reactor in the reactor pool; after the electromagnetic coil is powered off, the electromagnetic force disappears, and the connection between the lifting assembly and the control rod assembly is disconnected, so that the control rod assembly descends, and the emergency shutdown of the reactor is realized.
In the driving device provided by the embodiment of the invention, the lifting assembly is utilized to drive the control rod assembly to lift relative to the reactor core, so that the adjustment precision of the position of the control rod assembly is conveniently improved, and the accurate control of the reactor reactivity is realized. And the lifting component is connected with the control rod component by virtue of electromagnetic force generated when the electromagnetic coil is electrified, the control rod component is connected with the lifting component and disconnected by virtue of on-off of the electromagnetic force, and then free falling of the control rod component can be realized by virtue of disconnection of the electromagnetic force when emergency shutdown is required, and the emergency shutdown under the accident condition is realized rapidly, so that the safety and reliability of the operation of the reactor are improved.
Drawings
Other objects and advantages of the present invention will become apparent from the following description of embodiments of the present invention, which is to be read in connection with the accompanying drawings, and may assist in a comprehensive understanding of the present invention.
FIG. 1 is a schematic illustration of neutron absorbing material of a control rod assembly within the confines of a core according to one embodiment of the invention.
FIG. 2 is a schematic illustration of neutron absorbing material of a control rod assembly located outside of the core according to one embodiment of the invention.
Fig. 3 is a schematic structural view of a driving apparatus according to an embodiment of the present invention.
Figure 4 is a schematic view of a pressure housing according to one embodiment of the invention.
FIG. 5 is a schematic diagram of a drive apparatus at emergency shutdown according to one embodiment of the invention.
Reference numerals illustrate:
10. a control rod assembly; 11. a neutron absorbing material; 20. a core.
100. A pressure-bearing housing; 101. a limit part; 102. a limit matching part; 103. a coolant outlet; 104. a supporting part.
200. A lifting assembly; 201. a moving member; 202. a rotating member; 203. an accommodating groove.
300. An electromagnetic coil; 301. and (3) a cable.
400. A clamping member; 401. a magnetic conduction part; 402. an elastic member.
500. A drive assembly; 501. a permanent magnet; 502. a power member; 503. a rotating member; 504. a gear assembly.
It should be noted that the drawings are not necessarily to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.
Detailed Description
For the purposes, technical solutions and advantages of the present application, the technical solutions of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It will be apparent that the described embodiments are one embodiment of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without the benefit of the present disclosure, are intended to be within the scope of the present application based on the described embodiments.
It is to be noted that unless otherwise defined, technical or scientific terms used herein should be taken in a general sense as understood by one of ordinary skill in the art to which this application belongs. If, throughout, reference is made to "first," "second," etc., the description of "first," "second," etc., is used merely for distinguishing between similar objects and not for understanding as indicating or implying a relative importance, order, or implicitly indicating the number of technical features indicated, it being understood that the data of "first," "second," etc., may be interchanged where appropriate. If "and/or" is present throughout, it is meant to include three side-by-side schemes, for example, "A and/or B" including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. Furthermore, for ease of description, spatially relative terms, such as "above," "below," "top," "bottom," and the like, may be used herein merely to describe the spatial positional relationship of one device or feature to another device or feature as illustrated in the figures, and should be understood to encompass different orientations in use or operation in addition to the orientation depicted in the figures.
The inventor of the present invention has found that the performance of the driving device of the reactor control rod assembly as an important moving part of the reactor directly affects the reliability and safety of the operation of the reactor. In the operation process of the reactor, the reactivity is varied, and the conventional control rod driving device is difficult to realize accurate adjustment of the position of the control rod assembly, so that the reactivity of the reactor cannot be accurately controlled. In addition, under the accident condition of the reactor, the emergency shutdown is difficult to be conveniently and rapidly realized through the traditional control rod driving device, and the operation safety of the reactor cannot be well ensured.
Based on this, embodiments of the present invention provide a driving apparatus of a reactor control rod assembly for driving the lifting of the control rod assembly with respect to a reactor core, thereby adjusting a reaction rate of the reactor.
As shown in fig. 1 and 2, the control rod assembly 10 is provided with neutron absorbing material 11. As shown in fig. 1, the driving device may drive the control rod assembly downward such that the neutron absorbing material 11 of the control rod assembly 10 is located inside the core 20, and the neutron absorbing material 11 absorbs a large amount of neutrons in the core 20, thereby inhibiting the sustained fission of the nuclear fuel of the reactor and reducing the reaction rate of the reactor. As shown in fig. 2, the driving device may drive the control rod assembly 10 upward so that the neutron absorbing material 11 of the control rod assembly 10 is pushed out of the core 20 to be located outside the core 20, and at this time, the neutron absorbing material 11 stops absorbing neutrons in the core 20, thereby promoting the continuous fission of the nuclear fuel of the reactor and increasing the reaction rate of the reactor. The neutron absorbing material 11 may be boron, cadmium, silver indium cadmium, etc. for controlling the reaction rate of the reactor.
To drive the control rod assemblies relative to the core to adjust the position of the neutron absorbing material relative to the core, the present embodiments provide a drive arrangement for the reactor control rod assemblies. Referring to fig. 3, the driving device in this embodiment includes: a pressure-bearing housing 100, a lifting assembly 200 and an electromagnetic coil 300. The pressure housing 100 is fixedly disposed outside the reactor, and the pressure housing 100 is disposed in communication with a reactor pool of the reactor. The lifting assembly 200 is connected within the pressure housing 100, the lifting assembly 200 being adapted to be connected to the control rod assembly 10. The electromagnetic coil 300 is fixed to the outside of the pressure-bearing housing 100. Wherein the electromagnetic coil 300 is configured to generate electromagnetic force along a radial direction of the lifting assembly 200 when energized, such that the lifting assembly 200 is connected to the control rod assembly 10 by means of the electromagnetic force, the lifting assembly 200 being configured to move along an axial direction thereof to lift the control rod assembly 10 within the pool of the reactor relative to the core 20 of the reactor. After the electromagnetic coil 300 is powered off, the electromagnetic force is removed, and the connection between the lifting assembly 200 and the control rod assembly 10 is disconnected to lower the control rod assembly 10, so that emergency shutdown of the reactor is realized.
In the driving device of the embodiment, the lifting assembly 200 is utilized to drive the control rod assembly 10 to lift relative to the reactor core 20, so that the adjustment precision of the position of the control rod assembly 10 is improved, and the accurate control of the reactor reactivity is realized. And the lifting assembly 200 is connected with the control rod assembly 10 by virtue of electromagnetic force generated when the electromagnetic coil 300 is electrified, the control rod assembly 10 is connected with and disconnected from the lifting assembly by virtue of on-off of the electromagnetic force, the operation is simple and convenient, the stability is strong, meanwhile, under the accident working condition, the free falling of the control rod assembly is realized by virtue of the disconnection of the electromagnetic force, and the rapid shutdown can be realized, so that the safety and the reliability of the operation of a reactor are ensured.
In some embodiments, the drive means of the reactor control rod assembly may be located at the bottom of the reactor, and may be used in either research-type reactors or production-type reactors.
As shown in fig. 4, the portion highlighted as a bold line in fig. 4 is a pressure-bearing housing 100, and the pressure-bearing housing 100 is a continuous structure from top to bottom. In some embodiments, the driving device may be provided with a supporting portion 104 for providing a supporting force to the pressure housing 100, the pressure housing 100 is fixedly supported on the supporting portion 104, and a supporting surface of the supporting portion 104 is perpendicular to an axial direction of the pressure housing 100.
Further, the pressure-bearing housing 100 may be fixedly provided at the bottom of the reactor, the pressure-bearing housing 100 being provided with an interior communicating with the reactor pool above it, the lowermost end of the pressure-bearing housing 100 being provided with a coolant outlet 103 to form a coolant flow passage in the driving device, the coolant entering the pressure-bearing housing 100 from the reactor pool and flowing out of the coolant outlet 103.
In some embodiments, a receiving space is formed within the lift assembly 200 for receiving a portion of the control rod assembly 10 to effect displacement of the control rod assembly 10 relative to the core.
As shown in fig. 3, in some embodiments, the driving apparatus may further include: at least two clamping members 400, the clamping members 400 being disposed in the receiving space, the clamping members 400 being disposed to be connected with the control rod assembly 10; the clamping members 400 are provided with magnetic conductive portions 401, and radial electromagnetic force generated by the electromagnetic coil 300 is used for attracting the magnetic conductive portions 401, so that each clamping member 400 is abutted against the inner surface of the lifting assembly 200.
In this embodiment, the lift assembly 200 is connected within the pressure-containing housing 100, with a receiving space formed therein for receiving a portion of the control rod assembly 10, and another portion of the control rod assembly 10 extending from the top of the pressure-containing housing 100 into the reactor pool, with neutron absorbing material disposed in that portion outside of the pressure-containing housing 100. The control rod assembly 10 can be raised or lowered within the receiving space under the influence of the lifting assembly 200 to effect displacement of the control rod assembly 10 within a fixed spatial range and thus displacement of the neutron absorbing material 11 relative to the core 20.
Further, two clamping pieces 400 are provided, and one ends of the two clamping pieces 400 are abutted against and fixedly connected with the control rod assembly 10. Illustratively, the clamp 400 may be fixedly coupled to the control rod assembly 10 via a pin. The lower part of the clamping piece 400 is provided with a magnetic conduction part 401 on one side close to the inner surface of the lifting assembly 200, after the electromagnetic coil 300 is electrified, the electromagnetic force generates radial electromagnetic force, the magnetic conduction part 401 is attracted, the two clamping pieces 400 are opened by the magnetic conduction part 401 and are propped against the inner surface of the lifting assembly 200, so that the clamping piece 400 and the lifting assembly 200 are connected into a whole, the lifting assembly 200 and the control rod assembly 10 are connected, the control rod assembly 10 is conveniently controlled, and the control rod assembly 10 is driven to ascend or descend in the accommodating space. Illustratively, the magnetically permeable portion 401 may be constructed of magnetically permeable material to achieve efficient transfer of electromagnetic force.
In some embodiments, the inner surface of the lifting assembly 200 and the magnetic conductive portion 401 are formed with mutually matched tooth structures, so that the magnetic conductive portion 401 is engaged with the inner surface of the lifting assembly 200 when attracted by electromagnetic force, so as to ensure the connection stability, avoid the clamping piece 400 from sliding along the inner surface of the lifting assembly 200, and further enhance the operation stability and reliability of the driving device.
Specifically, since the electromagnetic coil 300 generates the attraction to the magnetic conduction part 401 by the radial electromagnetic force generated after the electromagnetic coil is electrified, the clamping piece 400 generates the radial counterforce with the lifting assembly 200 under the action of the magnetic conduction part 401, and the clamping piece 400 and the lifting assembly 200 are meshed and connected into a whole through the toothed structure of the inner surfaces of the magnetic conduction part 401 and the lifting assembly 200, the connection between the lifting assembly 200 and the control rod assembly 10 can be firmer by the meshed connection, so that the control precision of the lifting assembly 200 to the control rod assembly 10 is enhanced, the adjustment precision of the lifting assembly 200 to the position of the control rod assembly 10 is improved, and the accurate control of the reactor reactivity is realized.
In some embodiments, one end of the clamp 400 may be configured to rotatably couple with the control rod assembly 10, with an elastic member 402 coupled between at least two clamps 400, the elastic member 402 configured to be stretched by the clamps 400 when the solenoid 300 is energized. After the electromagnetic coil 300 is powered off, at least two clamping members 400 are closed in a direction away from the inner surface of the lifting assembly 200 under the elastic restoring force of the elastic member 402, so that the clamping members 400 are disconnected from the lifting assembly 200, the lifting assembly 200 is disconnected from the control rod assembly 10, and the control rod assembly 10 falls down to realize emergency shutdown of the reactor.
Illustratively, one end of the clamping member 400 may be rotatably coupled to the control rod assembly 10 by a pin such that the clamping member 400 can raise or lower the control rod assembly 10.
In this embodiment, the electromagnetic force generated after the electromagnetic coil 300 is energized attracts the magnetic conductive portion 401, and the two clamping pieces 400 generate radial reaction force with the lifting assembly 200 under the action of the magnetic conductive portion 401, so that the clamping pieces 400 are opened and are abutted against the inner surface of the lifting assembly 200. At this time, the elastic member 402 connected between the two clamping members 400 is pulled by the clamping members 400, so that the elastic member 402 is in a stretched state, and generates an elastic restoring force opposite to the radial attractive force. For example, the elastic member 402 may be an elastic element such as a spring.
As shown in fig. 5, under the accident condition of the reactor, the current of the electromagnetic coil 300 is cut off, at this time, the electromagnetic force attracting the magnetic conduction portion 401 disappears, and then the radial acting force between the lifting assembly 200 and the clamping members 400 disappears, at the same time, the two clamping members 400 are closed in a direction away from the inner surface of the lifting assembly 200 under the action of the elastic restoring force of the elastic member 402, and the elastic member 402 is restored to the initial state, so that the connection between the magnetic conduction portion 401 and the lifting assembly 200 is disconnected, and the control rod assembly 10 freely falls under the action of gravity, so that the neutron absorbing material 11 falls into the reactor core, the emergency shutdown of the reactor is rapidly realized, and the operation safety of the reactor is ensured.
In some embodiments, the lift assembly 200 may include: a moving member 201 and a rotating member 202. The moving member 201 is movably coupled to the pressure-bearing housing 100 in an axial direction thereof, a receiving space is formed in the moving member 201, and the control rod assembly 10 is coupled to the receiving space. In the present embodiment, the holder 400 is also provided in the accommodation space. The rotating member 202 is rotatably sleeved outside the moving member 201, the rotating member 202 is limited in the pressure-bearing shell 100, and the rotating member 202 is matched with the moving member 201, so that the moving member 201 and the control rod assembly 10 are driven to move up and down along the axial direction when the rotating member 202 rotates, the position of the control rod assembly 10 is adjusted, and the accurate control of the reactor reactivity is realized.
In this embodiment, the moving member 201 in the lifting assembly 200 is movably connected to the pressure-bearing housing 100 along the axial direction thereof, and a receiving space is formed inside the moving member, and the control rod assembly 10 is connected to the receiving space, so that the control rod assembly 10 can be lifted or lowered in the receiving space under the action of the moving member 201, so as to realize displacement of the control rod assembly 10 in a fixed space range. The rotating member 202 is rotatably sleeved outside the moving member 201 to power the moving member 201 and the control rod assembly 10 to move up and down in the axial direction.
When the reactor is in normal operation, the electromagnetic coil 300 is electrified, the electromagnetic coil 300 generates radial electromagnetic force, the electromagnetic force attracts the magnetic conduction part 401, the magnetic conduction part 401 enables the clamping piece 400 to be opened and to be abutted against the inner surface of the moving piece 201, so that the clamping piece 400 and the moving piece 201 are connected into a whole, namely, the moving piece 201 is connected with the control rod assembly 10 through the clamping piece 400. At this time, the rotating member 202 rotates around the axis of the moving member 201 to drive the moving member 201 to move up and down in the axial direction and drive the control rod assembly 10 to rise or fall in the accommodating space in the axial direction, so that the position of the control rod assembly 10 can be adjusted according to the requirement of controlling the reactivity of the reactor.
In some embodiments, the inner side of the pressure-bearing housing 100 is formed with a receiving groove 203, and the rotating member 202 is limited in the receiving groove 203 to limit the axial movement of the rotating member 202 along the moving member 201, so as to ensure the accuracy and stability of the operation of the lifting assembly 200.
In the present embodiment, the receiving groove 203 is formed inside the pressure-bearing housing 100, and the rotating member 202 is disposed inside the receiving groove 203. Through the limit of the accommodating groove 203 to the rotating member 202, the rotating member 202 cannot axially displace when rotating around the axis of the moving member 201, so that the influence on the rotating effect of the rotating member 202 is avoided, the displacement precision of the moving member 201 is ensured, and the accurate adjustment of the position of the control rod assembly 10 is realized.
In some embodiments, the pressure housing 100 forms rectangular protrusions radially outward, which protrude from the outer surface of the pressure housing 100, thereby forming receiving grooves 203 inside the pressure housing 100. In some embodiments, the accommodating groove 203 is located above the supporting portion 104, the supporting portion 104 is formed with a through hole matched with the diameter of the pressure-bearing housing 100, the pressure-bearing housing 100 penetrates through the through hole, and the accommodating groove 203 protruding from the outer surface of the pressure-bearing housing 100 is limited on the supporting portion 104, so that the pressure-bearing housing 100 is supported on the supporting portion 104, and the pressure-bearing housing 100 is fixed.
For example, the lifting assembly 200 may employ a planetary roller screw, which is a mechanical device for converting rotary motion into linear motion, and has the characteristics of high precision, high operation efficiency, strong bearing capacity, strong stability and adaptability, long service life, and the like, and the position of the control rod assembly 10 can be adjusted by using the planetary roller screw to better control the adjustment precision, so as to realize accurate control of the reactor reactivity.
When the lifting assembly 200 is a planetary roller screw, the screw is used as the moving member 201, the roller nut is used as the rotating member 202, the roller 2021 is disposed in the roller nut, referring to fig. 3, the portion of the roller nut highlighted as a black area in fig. 3 is the roller nut, the roller 2021 is limited in the roller nut by the hole plates at two ends of the roller nut, and the threads on the outer surface of the roller 2021 are engaged with the threads on the outer surface of the screw. When the roller nut rotates around the axis of the screw, the roller 2021 in the roller nut revolves around the axis of the screw while rotating around its own axis to drive the screw to move up and down in the axial direction and drive the control rod assembly 10 to rise or fall in the screw, thereby controlling the reactivity of the reactor.
In some embodiments, the moving member 201 is connected to the inner surface of the pressure-bearing housing 100, the inner surface of the pressure-bearing housing 100 is formed with a limiting portion 101, the outer surface of the moving member 201 is formed with a limiting engaging portion 102, and the limiting portion 101 is engaged with the limiting engaging portion 102 to limit the moving member 201 to rotate in the pressure-bearing housing 100, so that the moving member 201 moves up and down along the axial direction thereof, and meanwhile, the moving member 201 is prevented from moving up and down beyond a predetermined range, so as to ensure the operation safety of the driving device.
In some embodiments, the limiting portion 101 may be disposed on the inner surface of the pressure-bearing housing 100, and the uppermost position of the electromagnetic coil 300 in the extending direction may be disposed in a certain height range of the outer surface of the moving member 201, and the moving member 201 is limited in the electromagnetic force acting range generated by the electromagnetic coil 300 by the interaction of the limiting portion 101 and the limiting engaging portion 102, so that the moving member 201 can be kept connected with the control rod assembly 10 through the clamping member 400, so that the control rod assembly 10 moves up and down in a predetermined range, and the stability and safety of the operation of the reactor are ensured.
For example, the limiting portion 101 and the limiting mating portion 102 may be splines, where the limiting portion 101 is an internal spline, and the limiting mating portion 102 is an external spline, and the moving member 201 is limited to move up and down in the bearing housing 100 along the axial direction by the mutual mating of the internal spline and the external spline.
In some embodiments, the driving apparatus may further include: the assembly 500 is driven. The driving assembly 500 is disposed outside the pressure-bearing housing 100, the driving assembly 500 and the rotating member 202 are both provided with permanent magnets 501, and the driving assembly 500 and the permanent magnets 501 of the rotating member 202 are disposed to attract each other at both inner and outer sides of the pressure-bearing housing 100, so that the driving assembly 500 drives the rotating member 202 to rotate, and further, through rotation of the rotating member 202, the moving member 201 and the control rod assembly 10 are driven to rise or fall along the axial direction thereof, thereby adjusting the reactivity of the reactor.
In this embodiment, the permanent magnets arranged inside and outside the pressure-bearing housing can drive the lifting assembly 200 in the pressure-bearing housing 100 to move up and down through the driving assembly 500 outside the pressure-bearing housing 100, and the moving mechanism does not need to penetrate through the side wall of the pressure-bearing housing 100, so that a dynamic sealing structure does not need to be arranged on the pressure-bearing housing 100. In this embodiment, the pressure-bearing housing 100 adopts a static seal structure to avoid leakage of coolant and ensure tightness of the driving device. Static seals, also known as stationary seals, refer to seals between two stationary surfaces, typically achieved with a gasket seal. For example, the pressure housing 100 may be sealed to the stack using a static seal arrangement.
In some embodiments, the permanent magnets 501 may be provided in a plurality, wherein each two permanent magnets 501 are provided as a group, and are correspondingly provided to attract each other on the inner and outer sides of the pressure bearing housing 100, and the plurality of groups of permanent magnets 501 are uniformly distributed along the circumferential direction of the pressure bearing housing 100. The permanent magnet 501 transmits power generated by the driving assembly 500 to the rotating member 202 by generating a stable and durable magnetic field, thereby driving the rotating member 202 to rotate, and ensuring stability and safety of the transmission process. In addition, the permanent magnet 501 is made of a permanent magnet material.
In some embodiments, the permanent magnets 501 are ring-shaped and arranged inside or outside the pressure-bearing housing 100 in the circumferential direction of the pressure-bearing housing 100, so that the driving assembly 500 can drive the rotation member 202 in the pressure-bearing housing 100 to rotate by means of the permanent magnets 501 on both inner and outer sides of the pressure-bearing housing 100.
In some embodiments, the drive assembly 500 may include: a power member 502 and a rotary member 503. The rotating member 503 is rotatably sleeved outside the pressure-bearing housing 100, and the power member 502 is used for providing power for the rotation of the rotating member 503. The rotating member 503 is provided with a permanent magnet 501, and a position of the rotating member 202 corresponding to the permanent magnet 501 is also provided with another permanent magnet 501, and the two permanent magnets 501 attract each other at the inner side and the outer side of the pressure-bearing housing 100, so that when the power member 502 drives the rotating member 503 to rotate, the rotating member 202 is driven to rotate, and through the rotation of the rotating member 202, the displacement of the moving member 201 and the control rod assembly 10 is driven.
For example, the power member 502 may be a stepper motor, the rotating member 503 may be a rotor, and the power generated by the stepper motor rotates the rotor and drives the rotating member 202 to rotate through the rotation of the rotor, so as to realize power transmission.
In some embodiments, the rotating member 503 is disposed below the supporting portion 104, one end of the rotating member 202 near the supporting portion 104 extends below the supporting portion 104, and the permanent magnet 501 is disposed on a portion of the rotating member 202 below the supporting portion 104, so as to avoid the permanent magnet 501 from affecting the electromagnetic force of the electromagnetic coil 300 above. The power part 502 is supported on the supporting part 104 to fix the power part 502, and an output shaft of the power part 502 penetrates through the supporting part 104 to be connected with the rotating part 503 below the supporting part 104, so that the power part 502 drives the rotating part 503.
In some embodiments, the driving assembly 500 may further include a gear assembly 504, and the gear assembly 504 may be formed of a plurality of gears, and one end of the gear assembly 504 is connected to the output shaft of the power member 502, and the other end is connected to the rotating member 503, for transmitting power generated by the power member 502 to the rotating member 503.
Specifically, referring to fig. 4, the gear assembly 504 may include a gear 5041 and a gear 5042, a gear 5031 is formed on an edge of the rotating member 503 along a circumferential direction, a rotating shaft of the gear 5041 is connected below an output shaft of the power member 502, and the gear 5042 is connected between the gear 5041 and the gear 5031 and serves as a transition gear. The gear 5041 receives the power generated by the power element 502, and the gear 5042 transmits the power to the gear 5031, thereby achieving the power transmission from the power element 502 to the rotary element 503.
Further, when the power member 502 works, the generated power is transmitted to the rotating member 503 through the rotation of the gear assembly 504, so that the rotating member 503 rotates, and then the rotating member 503 transmits the power generated by the rotation to the other permanent magnet 501 corresponding to the rotating member through the permanent magnet 501 arranged on the rotating member 503, and the other permanent magnet 501 is arranged on the rotating member 202, so that the rotating member 202 rotates. According to the method, the rotating member 202 is driven to rotate when the rotating member 503 rotates, the power generated by the power member 502 is transmitted to the rotating member 202, so that the rotating member 202 rotates, the moving member 201 can be driven to move up and down along the axial direction through the rotation of the rotating member 202, and the control rod assembly 10 is driven to ascend or descend, so that the reactor reactivity is adjusted.
In some embodiments, the driving assembly 500 is disposed at a position far from the reactor, and the electromagnetic coil 300 is disposed to extend between the reactor and the driving assembly 500, so that when the lifting assembly 200 drives the control rod assembly 10 to lift, the electromagnetic force generated by the electromagnetic coil 300 covers the moving range of the clamping member 400, thereby controlling the open-close state of the clamping member 400, so that the control rod assembly 10 moves or falls.
In some embodiments, the electromagnetic coil 300 is fixedly disposed on the outer side of the pressure-bearing housing 100 and extends between the reactor and the driving assembly 500, so that the radial electromagnetic force generated by the electromagnetic coil 300 can cover the moving range of the clamping member 400, and the clamping member 400 is continuously attracted by the electromagnetic force in the moving process, so that uncontrolled movement or falling of the control rod assembly 10 is avoided, and the stability and safety of the operation of the reactor are ensured.
In this embodiment, the electromagnetic coil 300 is annularly disposed outside the pressure-bearing housing 100, and a plurality of windings formed by winding wires are annularly arranged to form the electromagnetic coil 300, and an insulating layer is disposed between the windings for preventing short circuits between the windings. In addition, the electromagnetic coil 300 includes a cable 301 for connection to an external power source. During operation of the drive, current in the electromagnetic coil 300 is provided by the cable 301.
It should also be noted that, in the embodiments of the present invention, the features of the embodiments of the present invention and the features of the embodiments of the present invention may be combined with each other to obtain new embodiments without conflict.
The present invention is not limited to the above embodiments, but the scope of the invention is defined by the claims.

Claims (10)

1. A drive arrangement for a reactor control rod assembly, comprising:
a pressure-bearing housing fixedly disposed outside the reactor and disposed in communication with a reactor pool of the reactor;
the lifting assembly is connected in the pressure-bearing shell and is used for being connected with the control rod assembly;
the electromagnetic coil is fixed on the outer side of the pressure-bearing shell;
wherein,
the electromagnetic coil is arranged to generate electromagnetic force along the radial direction of the lifting assembly when being electrified so as to enable the lifting assembly to be connected with the control rod assembly by virtue of the electromagnetic force, and the lifting assembly is arranged to move along the axial direction of the lifting assembly so as to drive the control rod assembly to lift relative to the reactor core of the reactor in the reactor pool;
and after the electromagnetic coil is powered off, the electromagnetic force disappears, and the connection between the lifting assembly and the control rod assembly is disconnected to enable the control rod assembly to descend so as to realize emergency shutdown of the reactor.
2. The drive of claim 1, wherein the lifting assembly has a receiving space formed therein for receiving a portion of the control rod assembly;
the driving device further includes:
at least two clamping pieces, wherein the clamping pieces are arranged in the accommodating space and are connected with the control rod assembly;
the clamping pieces are provided with magnetic conduction parts, and radial electromagnetic force generated by the electromagnetic coil is used for attracting the magnetic conduction parts so that each clamping piece is propped against the inner surface of the lifting assembly.
3. The driving device as recited in claim 2 wherein said inner surface of said lifting assembly and said magnetically permeable portion are formed with cooperating tooth-like structures for engaging said magnetically permeable portion with said inner surface of said lifting assembly when attracted by said electromagnetic force.
4. The drive of claim 2, wherein one end of the clamping members is configured to be rotatably connected to the control rod assembly, and an elastic member is connected between at least two of the clamping members, the elastic member being configured to be stretched by the clamping members when the electromagnetic coil is energized;
after the electromagnetic coil is powered off, at least two clamping pieces are close to each other in the direction away from the inner surface of the lifting assembly under the elastic restoring force of the elastic piece, so that the clamping pieces are disconnected with the lifting assembly.
5. The drive of claim 1, wherein the lifting assembly comprises:
the moving piece is movably connected in the pressure-bearing shell along the axial direction of the moving piece, an accommodating space is formed in the moving piece, and the control rod assembly is connected in the accommodating space;
the rotating piece is rotatably sleeved outside the moving piece, the rotating piece is limited in the pressure-bearing shell, and the rotating piece is matched with the moving piece, so that the moving piece and the control rod assembly are driven to move up and down along the axial direction when the rotating piece rotates.
6. The driving device as recited in claim 5 wherein said moving member is coupled to an inner surface of said housing, wherein said inner surface of said housing defines a stop portion, wherein said outer surface of said moving member defines a stop mating portion, and wherein said stop portion mates with said stop mating portion for limiting rotation of said moving member within said housing.
7. The driving device as recited in claim 5, wherein an accommodating groove is formed at an inner side of said pressure-bearing housing, and said rotating member is limited in said accommodating groove to limit an axial movement of said rotating member along said moving member.
8. The drive of claim 5, further comprising:
the driving assembly is arranged outside the pressure-bearing shell, the driving assembly and the rotating piece are both provided with permanent magnets, and the permanent magnets are arranged to attract each other at the inner side and the outer side of the pressure-bearing shell so that the driving assembly drives the rotating piece to rotate.
9. The drive of claim 8, wherein the drive assembly comprises:
a power member;
the rotating piece is rotatably sleeved outside the pressure-bearing shell, and the power piece is used for providing power for the rotation of the rotating piece;
the rotary part is provided with a permanent magnet, the position of the rotary part corresponding to the permanent magnet is also provided with another permanent magnet, and the two permanent magnets are attracted to each other at the inner side and the outer side of the pressure-bearing shell, so that the rotary part is driven to rotate when rotating.
10. The drive of claim 8, wherein the drive assembly is disposed at a location remote from the reactor, and the electromagnetic coil is disposed to extend between the reactor and the drive assembly such that an electromagnetic force generated by the electromagnetic coil covers a range of movement of the clamp when the control rod assembly is lifted by the lifting assembly.
CN202311501472.0A 2023-11-13 2023-11-13 Driving device of reactor control rod assembly Pending CN117292853A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311501472.0A CN117292853A (en) 2023-11-13 2023-11-13 Driving device of reactor control rod assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311501472.0A CN117292853A (en) 2023-11-13 2023-11-13 Driving device of reactor control rod assembly

Publications (1)

Publication Number Publication Date
CN117292853A true CN117292853A (en) 2023-12-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311501472.0A Pending CN117292853A (en) 2023-11-13 2023-11-13 Driving device of reactor control rod assembly

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Country Link
CN (1) CN117292853A (en)

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