Pebble bed modular high temperature gas-cooled reactor fuel loading and unloading system

Abstract

The invention relates to a pebble-bed module type high-temperature gas cooled reactor fuel loading and unloading system which comprises a reactor (10), a reactor core fuel circulating system (20), a new fuel loading system (300) and a spent fuel unloading system (400). The reactor (10) comprises a reactor pressure container (11), a graphite coating reactor internal component (12), a central reactor core cylinder (13), a metal reactor internal component (15) and an unloading pipe (14), the reactor core fuel circulating system (20) comprises a reactor core unloading system (100) and a reactor core loading system (200) and further comprises a helium pneumatic conveying system (500), a compressed air pneumatic conveying system (600), a vacuum pumping system (700) and a helium supplying and recycling system (800), and the compressed air pneumatic conveying system (600), the vacuum pumping system (700) and the helium supplying and recycling system (800) are all connected with the helium pneumatic conveying system (500). The helium pneumatic conveying system (500) is further respectively connected with the reactor (10), the reactor core fuel circulating system (20), the new fuel loading system (300) and the spent fuel unloading system (400).

Description

technical field [0001] The invention belongs to the technical field of reactor engineering, in particular to a pebble bed modular high temperature gas-cooled reactor fuel loading and unloading system. Background technique [0002] The pebble bed modular high-temperature reactor utilizes the favorable geometric characteristics of spherical fuel elements, relies on the gravity of the elements and the pressurized gas in the pipeline, and uses the elements to run through the core multiple times, so that the chain reaction of the fuel elements is more sufficient, and the power of the core is flattened. , thus increasing the availability of the reactor and the load factor of the power plant. [0003] In the pebble bed modular high-temperature reactor commercial power station, the fuel loading and unloading system, under program and logic control, fully automatically executes the circulation, loading and unloading, burnup measurement, directional delivery and temporary storage of c...

AI Technical Summary

Problems solved by technology

Due to the complex structure of the broken ball separator, which generally adopts a horizontal structure, the flanges, shields, rollers and other parts on the shafting path must be manually removed during maintenance and disassembly. The isolation of radioactive atmosphere and the protection of maintenance personnel are very difficult

[0010] The above two invention patents respectively disclose a fuel delivery system suitable for a dual-zone single-stack with 10 passes through the core and an online refueling system suitable for a single-zone double-stack with 6 passes through the core from two aspects of process and layout. It does not solve the problems of safety isolation and broken tube protection, operation reliability and maintenance safety that commercial nuclear power plants must face

Images