Overball inspection and external inspecting system for loading-unloading system of ball-bed piled fuel component

Abstract

The ball bed piles the fuel element loading and unloading systematic ball examination method and outside installs the type examination system to belong to the ball bed type reactor fuel part examination area of technology. Is by installs has installed the type examination system outside ball pipeline outside, examines two examination coils using the distant field turbulent flow principle the voltage, and carries on the demodulation keleck and phase demodulation processing separately to this two examination coil voltage, obtains contains has had ball information demodulation keleck output voltage UOA and phase demodulation output voltage UOP, then carries on to this voltage UOA and UOP further analyzes and processing, thus judges in the ball pipeline whether has the ball process. This invention also proposed outside installs the type examination system. Uses this invention, the installment and the service does not need to destroy the ball pipeline, guaranteed installs the ex-denning pipeline the integrity and high-pressured gas tightness, reduces the radiation pollution; The sensor coil, the skeleton and other appendices with the radioactive fuel ball contact, are directly low to the entire examination sensor material radioresistance request, are advantageous in enhance the sensor the service life.

Description

Technical field: [0001] A ball-passing detection method for a pebble bed reactor fuel element loading and unloading system and an external detection system belong to the technical field of pebble bed reactor fuel element detection. Background technique [0002] At present, energy shortage has become one of the main problems plaguing countries all over the world, and it also poses a severe challenge to my country's sustainable development. Reasonable and orderly development of nuclear energy is an important means to solve the energy crisis, and has been highly valued by the country. The pebble bed high-temperature gas-cooled reactor is an advanced reactor type, which has the advantages of high power generation efficiency, good safety, and the ability to load and unload fuel without stopping the reactor. The pebble bed high-temperature gas-cooled reactors that have been built in the world include Germany's AVR reactor and THTR reactor, China's HTR-10 high-temperature gas-coole...

AI Technical Summary

Problems solved by technology

[0006] (1) The installation of the sensor destroys the integrity of the ball passing pipe. The structure and installation method of the sensor must ensure the high pressure airtightness of the ball passing pipe. Therefore, the sensor structure is complex and difficult to install

[0007] (2) After the sensor fails, the maintenance and replacement of the sensor must disassemble the ball pipe. The construction time is long, and it is easy to cause radiation pollution and affect the availability of the reactor.

[0008] (3) The sensor coil, skeleton and other accessories are in direct contact with the radioactive fuel ball, which requires high radiation resistance of the entire detection sensor material, which affects the service life of the sensor

Images