Hydraulic suspension type reactor shutdown rod and working method thereof

Abstract

The invention discloses a hydraulic suspension type reactor shutdown rod and a working method thereof. The hydraulic suspension type reactor shutdown rod comprises a control rod guide tube, a reactor core, a cladding, a neutron absorber and a main coolant pump; the control rod guide tube is installed in a reactor core, the cladding is located in the control rod guide tube, a gap is formed between the control rod guide tube and the cladding, the neutron absorber is arranged in the cladding, a discharge hole is formed in the side face of the control rod guide tube, and the buffer device is installed at a bottom inlet of the control rod guide tube. an outlet of the main coolant pump is communicated with a bottom inlet of the control rod guide pipe. According to the shutdown rod and the working method thereof, the use of a mechanical claw can be avoided, meanwhile, the diversity of shutdown is realized, and the safety is higher.

Description

technical field [0001] The invention belongs to the field of nuclear reactor shutdown rods, and relates to a hydraulic suspension type reactor shutdown rod and a working method thereof. Background technique [0002] At present, the shutdown rods of advanced reactors adopt passive and fail-safe design concepts. When an emergency control situation occurs, the shutdown rod drive mechanism will automatically power off, the shutdown rod mechanical claw will be disengaged, and the shutdown rod will be inserted into the reactor core by gravity. , to ensure the control of the reactor; the design of the reactor shutdown rod adopts the "single failure" principle, that is, when a shutdown rod fails and cannot be dropped, the automatic control of the reactor can still be guaranteed. The design of the above-mentioned reactor shutdown rods has the following disadvantages: first, the premise of the gravity drop of the shutdown rods is that the mechanical claws are disengaged, and the failu...

AI Technical Summary

Problems solved by technology

The design of the above-mentioned reactor shutdown rods has the following disadvantages: first, the premise of the gravity drop of the shutdown rods is that the mechanical claws are disengaged, and the failure of the mechanical device may cause the rods to be stuck; In the case of core insertion, emergency boron injection is required for pressurized water reactors, but for sodium-cooled fast reactors / lithium-cooled fast reactors / lead-cooled fast reactors / molten salt reactors, emergency boron injection is not feasible, and there is a lack of redundant shutdown thirdly, the shutdown rods all adopt the working mode of the shutdown rod drive mechanism and mechanical claws, and the diversity design of the shutdown methods is insufficient

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