Limiting plate structure, upper reactor inner component and suspension basket component

Abstract

The invention discloses a limiting plate structure, an upper reactor inner component and a suspension basket component, wherein the upper reactor inner component is used for installing the limiting plate structure, and the suspension basket component is used for providing support for the limiting plate structure. The limiting plate structure comprises a sliding cylinder and a lower end plate fixedon the bottom of the sliding cylinder, and a plurality of through holes are arranged on the lower end plate, the axis of each through hole is parallel to the axis of the sliding cylinder; a guiding device is arranged on the side wall of the sliding cylinder, after the lower end of the upper reactor inner component is embedded into the sliding cylinder from the upper end of the sliding cylinder, the guiding device is used to limit the movement state of the sliding cylinder relative to the upper reactor inner component; and the sliding cylinder only can slide up and down along the axis of the upper reactor inner component. The limiting plate structure can effectively avoid the problem that a fuel assembly is pressed by a coil spring to reduce the structural strength requirement of the fuelassembly.

Description

technical field [0001] The invention relates to the technical field of reactor structure design, in particular to a limiting plate structure, an upper reactor internal component and a hanging basket assembly. Background technique [0002] Nuclear reactors are generally equipped with dozens of core instruments for measuring the neutron flux rate of the core. During the operation of the nuclear reactor, these core instruments pass through the pressure vessel and the upper reactor internals, insert the fuel assembly, and are replaced when the reactor is shut down. Before refueling, with the hoisting of the upper reactor internals, these core instruments are drawn away from the fuel assembly to provide shielding and protection for this section of core instruments with high radiation dose. The simpler method is to install a An instrument bushing. When lifting the upper reactor internals before refueling, the instrument bushing gradually protrudes from the upper core plate to prov...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the existing fuel assembly proposed above needs to withstand the additional compression force exerted by the coil spring, resulting in high requirements on the structural strength of the fuel assembly, the present invention provides a limiting plate structure, an upper stack internal component and a hanging basket assembly , the upper internal components are used to install the limit plate structure, and the hanging basket assembly is used to provide support for the limit plate structure

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