Safe shutdown rod driving mechanism suitable for heat pipe reactor

Abstract

The invention belongs to the field of nuclear reactor reactivity control, and particularly discloses a safety shutdown rod driving mechanism suitable for a heat pipe reactor, which comprises a driving motor, a screw transmission pair, a latch device, a driving rod and an energy storage spring, the driving motor and the spiral transmission pair form an executing mechanism, the output end of the driving motor is connected with one end of the screw, and rotation of the driving motor is converted into linear motion of the nut. The driving rod slidably penetrates through the latch device, one end of the driving rod is in contact connection with the nut, the other end of the driving rod penetrates through the reactor core channel and is connected with a shutdown rod, and an energy storage spring is mounted at the other end of the shutdown rod. The safe shutdown driving mechanism provided by the invention is accurate in driving and transmission action, stable and reliable in operation, simple and feasible in structure, capable of realizing shutdown rod action under the power loss condition by utilizing the energy storage device, suitable for various emergency working conditions, timely in response and capable of meeting the safe shutdown requirement.

Description

technical field [0001] The invention relates to the field of nuclear reactor reactivity control, in particular to a safety shutdown rod driving mechanism suitable for a heat pipe reactor. Background technique [0002] Heat pipe cooling The reactor uses high-temperature alkali metal (sodium, potassium, lithium, etc.) heat pipes for core heat transfer. Specifically, one end of a certain length of heat pipe is inserted into the reactor to absorb the core heat, and the other end is connected to a heat exchanger or thermoelectric conversion system. Since the heat transfer process of the heat pipe is static and does not require external power to pump the coolant, it is considered to have good inherent safety and reliability, and has passive, fully static, and efficient heat transfer characteristics. In the 1980s, the United States put forward the concept of SPAR, a 100kWe space reactor based on heat pipes. Heat pipe reactor technology was applied to space reactors in the early st...

AI Technical Summary

Problems solved by technology

The safety shutdown rod driving mechanism is the emergency shutdown device of the heat pipe reactor, which requires accurate driving and transmission actions, stable and reliable operation, simple and easy structure, and can realize the shutdown rod action in time under the condition of power failure. It is suitable for various emergency working conditions, it can meet the requirements of safe shutdown, and the current safety shutdown rod drive mechanism still needs to be improved

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