Device for isolating and conveying fuel spheres of sphere bed high temperature reactor

Abstract

The invention provides a device for isolating and conveying fuel spheres of a sphere bed high temperature reactor, belonging to the technical field of reactor engineering. The device mainly comprises an end cover component, a box component, a rotating disc component and a driving component, wherein the main body of the rotating disc component is a rotating disc with two structural characteristics of a sphere guide groove and a sphere through hole; two arced supports are arranged above the sphere through hole and at two sides of the sphere guide groove; the end cover component is welded with a sphere through connecting pipe which passes through the end cover; two ear plates are machined at the lower part of the sphere through connecting pipe; and after being assembled, the ear plates of the sphere through connecting pipe in the end cover component are arranged at the upper part inside the sphere guide groove; and the sphere through connecting pipe on the box component is arranged in equal diameter and coaxial with the sphere through connecting pipe in the end cover component. By utilizing the device for isolating and conveying the fuel spheres of the sphere bed high temperature reactor in such a technical scheme, the fault that spheres are crushed and blocked is avoided, the reliability of single fuel sphere conveying and the utilizability of the reactor are ensured, the installation space of a pipeline system is effectively saved, and the working quantity in installation is reduced.

Description

technical field [0001] The invention relates to the technical field of reactor engineering, in particular to a fuel ball spacer conveying device for a pebble bed high-temperature reactor. Background technique [0002] The pebble bed high-temperature gas-cooled reactor uses spherical fuel elements to pass through the core multiple times to achieve continuous operation without stopping the reactor. After a series of processes, the consumed spent fuel is transported to the spent fuel storage system for interim storage in the plant, while a large number of fuel balls that do not reach the target are transported back to the core by pneumatic transport with helium to continue to react and recycle. Load new fuel elements into the core equal to the number of unloaded spent fuel to ensure the reactivity of the reactor. [0003] At some specific positions during core unloading, burnup measurement, spent fuel unloading, and new fuel loading, temporary storage pipe sections for spheric...

AI Technical Summary

Problems solved by technology

However, if there are broken balls or slag in the pipeline, due to the depth and space limitations of the receiving cup, the fuel balls in the receiving cup will be raised and exceed the shear plane, resulting in ball cutting or ball jamming failures, which must be Utilize the upstream auxiliary device, refer to the invention patent "Pebble Bed High Temperature Reactor Ball Flow Pipeline Locker" (Patent No. CN201010103320.1) to cut off the fuel elements in series, and after releasing the pressure of the pipeline, open the small flange on the opposite side of the rotor shaft Cover, with the help of a long-handled wrench and the square end of the rotor shaft, the components are forcibly chopped, and the highly radioactive spherical components in the upstream pipeline are safely discharged, and then the delivery device is reassembled, and a series of atmosphere replacement and pipeline pressure are carried out. System operation can only be resumed after operation

Outage maintenance has a great impact on the availability and economy of nuclear power plants, and may cause dose exposure to equipment maintenance personnel

With this combined device, the local pipeline system is complicated, and more than ten temporary storage pipe sections in the fuel loading and unloading system are complicated, and the system manufacturing and installation costs are high

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