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CN-224203848-U - Reactor control mechanism and reactor

CN224203848UCN 224203848 UCN224203848 UCN 224203848UCN-224203848-U

Abstract

The utility model discloses a reactor control mechanism and a reactor, and particularly relates to the technical field of nuclear reactors. The reactor control mechanism comprises a sleeve assembly, an air pressure unit and a liquid storage unit, wherein the sleeve assembly is arranged inside a reactor container, the liquid storage unit is arranged above the outside of the reactor container, the air pressure unit is arranged on the lateral surface of the outside of the reactor container, one end of the sleeve assembly is simultaneously communicated with the air pressure unit and the liquid storage unit, the liquid storage unit is used for storing liquid neutron absorption liquid, the air pressure unit is used for storing inert gas, and the sleeve assembly is used for controlling the reaction rate of the reactor. The utility model solves the technical problems of complex structure, easy rod clamping, higher reactor container height and unfavorable miniaturization of the reactor caused by mechanical control rods in the prior art, and provides the reactor control mechanism and the reactor with simple structure, reasonable layout, easy realization and high safety.

Inventors

  • Request for anonymity
  • Request for anonymity

Assignees

  • 中子科学研究院(合肥)有限公司

Dates

Publication Date
20260505
Application Date
20250410

Claims (10)

  1. 1. A reactor control mechanism is characterized by comprising a sleeve assembly (1), an air pressure unit (2) and a liquid storage unit (3), wherein the sleeve assembly (1) is arranged inside a reactor container (00), the liquid storage unit (3) is arranged above the outside of the reactor container (00), the air pressure unit (2) is arranged on the lateral surface of the outside of the reactor container (00), one end of the sleeve assembly (1) is simultaneously communicated with the air pressure unit (2) and the liquid storage unit (3), the liquid storage unit (3) is used for storing liquid neutron absorption liquid, the air pressure unit (2) is used for storing inert gas, and the sleeve assembly (1) is used for controlling the reactor reaction rate.
  2. 2. A reactor control mechanism as claimed in claim 1, characterized in that the sleeve assembly (1) comprises an inner tube (11) and an outer tube (12), the inner tube (11) being coaxial with the outer tube (12) and being arranged at intervals to form a sleeve structure, one end of the outer tube (12) being sealed and the other end being in communication with the gas pressure unit (2), one end of the inner tube (11) being open and the other end being in communication with the liquid storage unit (3), the open end of the inner tube (11) being close to the sealed end of the outer tube (12).
  3. 3. A reactor control mechanism according to claim 1, wherein the sleeve assembly (1) is provided in a U-shape.
  4. 4. A reactor control mechanism according to claim 2, characterized in that the gas pressure unit (2) comprises a gas pressure tank (21), the gas pressure tank (21) being in communication with the outer tube (12) via a first conduit (22), a pressure measuring module (23) being arranged in the gas pressure tank (21).
  5. 5. A reactor control mechanism according to claim 4, characterized in that the pneumatic unit (2) further comprises a second pipeline (24), one end of the second pipeline (24) is communicated with the first pipeline (22), the other end is communicated with the external environment, and electromagnetic valves (25) are arranged on the first pipeline (22) and the second pipeline (24).
  6. 6. A reactor control mechanism according to claim 2, characterized in that the reservoir unit (3) comprises a reservoir (31), the reservoir (31) being in communication with the inner tube (11).
  7. 7. A reactor control mechanism as claimed in claim 6, characterized in that the reservoir unit (3) further comprises a level measurement module (32), the level measurement module (32) being located inside the reservoir (31).
  8. 8. The reactor control mechanism of claim 1, wherein the liquid neutron absorbing liquid is any one of a boron-containing liquid, a gadolinium-containing liquid, a hafnium-containing liquid, and an erbium-containing liquid.
  9. 9. A reactor comprising a reactor control mechanism as claimed in any one of claims 3 to 8, said control mechanism being provided in plurality.
  10. 10. A reactor according to claim 9, further comprising a nuclear fuel assembly (4), each thimble assembly (1) being inserted into said nuclear fuel assembly (4) at a vertical end remote from the reservoir unit (3), the vertical end adjacent the reservoir unit (3) being adjacent the inner wall of the stack vessel (00), the elbow portion of the thimble assembly (1) being located at the bottom of the nuclear fuel assembly (4).

Description

Reactor control mechanism and reactor Technical Field The utility model relates to the technical field of nuclear reactors, in particular to a reactor control mechanism and a reactor. Background Since a liquid metal-cooled reactor or a gas-cooled reactor uses liquid metal or gas as a coolant, and a neutron absorbing material such as boric acid cannot be directly added to the coolant to perform reactivity control like a pressurized water reactor, conventionally, reactivity control is generally performed by a mechanical control rod system, and reactivity control is performed by inserting or extracting a rod-shaped neutron absorbing material into or from a reactor core. However, the mechanical control rod has a complex structure, and a large number of mechanical structures are included in the structure of the mechanical control rod, which brings about a safety risk due to the problems of mechanical structure failure, rod clamping and the like. In the process of up-and-down movement of the mechanical control rods, a large amount of movable space is needed, and enough height is needed to be reserved above the reactor core, so that the reactor container is high, the miniaturization of the device is not facilitated, and the construction cost is increased. Disclosure of utility model The utility model aims to solve the technical problems of complex structure, easy rod clamping, higher reactor container height and unfavorable miniaturization of a reactor caused by a mechanical control rod in the prior art, and provides the following technical scheme: The reactor control mechanism comprises a sleeve assembly, an air pressure unit and a liquid storage unit, wherein the sleeve assembly is arranged inside a reactor container, the liquid storage unit is arranged above the outside of the reactor container, the air pressure unit is arranged on the lateral surface of the outside of the reactor container, one end of the sleeve assembly is simultaneously communicated with the air pressure unit and the liquid storage unit, the liquid storage unit is used for storing liquid neutron absorption liquid, the air pressure unit is used for storing inert gas, and the sleeve assembly is used for controlling the reaction rate of the reactor. Further, the sleeve assembly comprises an inner pipe and an outer pipe, wherein the inner pipe and the outer pipe are coaxial and are arranged at intervals to form a sleeve structure, one end of the outer pipe is sealed, the other end of the outer pipe is communicated with the air pressure unit, one end of the inner pipe is open, the other end of the inner pipe is communicated with the liquid storage unit, and the open end of the inner pipe is close to the sealed end of the outer pipe. Preferably, the sleeve assembly is arranged in a U shape. The air pressure unit comprises an air pressure tank, the air pressure tank is communicated with the outer tube through a first pipeline, and a pressure measurement module is arranged in the air pressure tank. The air pressure unit further comprises a second pipeline, one end of the second pipeline is communicated with the first pipeline, the other end of the second pipeline is communicated with the external environment, and electromagnetic valves are arranged on the first pipeline and the second pipeline. The liquid storage unit comprises a liquid storage tank, and the liquid storage tank is communicated with the inner pipe. The liquid storage unit further comprises a liquid level measurement module, and the liquid level measurement module is located inside the liquid storage tank. The liquid neutron absorbing liquid is any one of boron-containing liquid, gadolinium-containing liquid, hafnium-containing liquid and erbium-containing liquid. A reactor comprising a reactor control mechanism according to any one of the embodiments described above, the control mechanism being provided in plurality. The reactor further comprises a nuclear fuel assembly into which the vertical end of each thimble assembly remote from the reservoir is inserted, the vertical end adjacent the reservoir being adjacent the inner wall of the reactor vessel, and the elbow portion of the thimble assembly being located at the bottom of the nuclear fuel assembly. The invention has the following advantages: (1) The control mechanism provided by the utility model can control the reaction rate of the reactor through the liquid neutron absorption liquid by mutually matching the sleeve component, the air pressure unit and the liquid storage unit, replaces a mechanical control rod commonly used in the prior art, and simultaneously, the sleeve component can optimize the length, the thickness, the pipe layout and the like according to the actual condition of a product, so that the overall structure design of the reactor is optimized. Meanwhile, the control mechanism has a simple structure, no complicated mechanical structure and reduces the equipment cost of the reactor control system, and the moving