Ball stopper applied to high-temperature gas-cooled reactor

Abstract

The invention provides a ball stopper applied to a high-temperature gas-cooled reactor. The ball stopper comprises a box body assembly, a power part, a magnetic transmission device, a rotor assembly and a shield, wherein the box body assembly comprises a box body with ball through holes and a rotor sink hole in the surface, as well as a ball inlet pipe and a ball outlet pipe which are connected with the box body; the ball through holes, the ball inlet pipe and the ball outlet pipe are coaxial and isometric and are perpendicular to the rotor sink hole; the rotor assembly comprises a bearing and a rotor; the rotor is supported in the rotor sink hole of the box body through the bearing and connected with an inner magnetic assembly of the magnetic transmission device; the rotor is provided with a rotor through hole; the diameter of the rotor through hole is the same as that of each of the ball through holes, the ball inlet pipe and the ball outlet pipe and is greater than that of a spherical element; the shield is connected with a bracket of the magnetic transmission device; the power part is arranged in the shield and connected with the bracket of the magnetic transmission device through a shaft coupler assembly. According to the ball stopper, the stopping and running functions can be performed on single column of spherical elements, and the operating reliability requirements of long-term intermittent running can be met.

Description

technical field [0001] The invention relates to reactor engineering, in particular to a ball stopper applied to a high-temperature gas-cooled reactor. Background technique [0002] The pebble bed high-temperature gas-cooled reactor uses spherical fuel elements (hereinafter referred to as spherical elements) to pass through the core multiple times to achieve non-stop continuous operation. In the HTR-PM demonstration power plant, the number of fuel balls that the dual stacks participate in circulation reaches 12,000 per day, the circulation speed is 250 balls / hour, and the fast circulation speed is as high as 375-500 balls / hour. The spent fuel of each is about 800. Chinese invention patent CN101083153B discloses a high-temperature gas-cooled reactor line refueling system for the HTR-PM project. Compared with the HTR-10 high-temperature gas-cooled experimental reactor, the fuel loading and unloading and cycle load of HTR-PM are greatly improved. In each ball flow pipeline sys...

AI Technical Summary

Problems solved by technology

The device is suitable for stopping and passing non-radioactive new fuel balls. For core circulating spherical elements or spent fuel elements with strong radioactivity and residual heat, on the one hand, the amount of single ball stopping is large and the ball stopping time is long. On the one hand, the amount of passing balls is large, so the temperature of the device is relatively high, and the cumulative γ-ray radiation dose is large, and the disclosed device cannot meet the reliability requirements of long-term operation

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