Nuclear power plant neutron poison hanging sample device

Abstract

The invention discloses a device for suspending a nuclear power station neutron poison sample, which comprises an upper tube socket, a lower tube socket, a plurality of support frame beams between the upper tube socket and the lower tube socket, and sample suspension grooves formed on the outer side of the support frame beams and fixedly connected with the support frame beams. When the nuclear power station is in service, the suspension samples can be placed in the suspension grooves of the device provided by the invention and can be periodically extracted for test detection, so as to judge whether the neutron poison material in spent fuel storage frameworks is effective or not, and periodically detect the neutron poison material in the spent fuel storage frameworks of a spent fuel storage water tank in a tracking manner; and the spent fuel storage frameworks falling short of requirements can be replaced or repaired according to the detection result, thereby ensuring the safety storage of the spent fuel components in the nuclear power station.

Description

technical field [0001] The invention relates to the field of monitoring neutron poisons in spent fuel pools of nuclear power plants, in particular to a device for hanging samples of neutron poisons in spent fuel pools of nuclear power plants. To ensure the safety of the pool where the spent fuel storage grid is located and to maintain the safe storage of spent fuel assemblies in nuclear power plants without jamming fuel assemblies during spent fuel operation and storage. Background technique [0002] Neutron poisons are substances that strongly absorb neutrons without fission, such as boron, gadolinium, etc. Boron can effectively absorb neutrons in a wide range of neutron energy, so that the chain reaction in the reactor is inhibited. Because pure boron is hard and brittle and cannot be processed, boron-containing materials such as boron carbide and metal borides are actually used. Soluble boric acid was sprayed into the core during a reactor accident, causing the reactor t...

AI Technical Summary

Problems solved by technology

However, there is no domestic experience in setting up neutron poison suspension samples in spent fuel storage grids, and the information obtained so far on the neutron poison suspension samples of the AP1000 nuclear power unit constructed for the first time in China is only a conceptual description, not definite. Feasible solution

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